feat: 实现可靠事件与证据 connector (#153)

docs: 同步 #151 机器身份与安全传输 v1

Bell/server/app/bell/integration/event_ingress/evidence.go

@@ -0,0 +1,117 @@
+package event_ingress
+
+import (
+	"bytes"
+	"context"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"gorm.io/gorm"
+
+	"go-admin/app/bell/integration/machine_identity"
+)
+
+type EvidenceClient struct {
+	Endpoint string
+	Signer   machine_identity.Signer
+	HTTP     interface {
+		Do(*http.Request) (*http.Response, error)
+	}
+}
+
+func NewEvidenceClient(endpoint string, signer machine_identity.Signer) (*EvidenceClient, error) {
+	parsed, err := url.Parse(endpoint)
+	if err != nil || parsed.Scheme != "https" || parsed.Host == "" || parsed.User != nil || parsed.Path != "" || parsed.RawQuery != "" || parsed.Fragment != "" {
+		return nil, errors.New("Sense evidence endpoint must be an HTTPS origin without userinfo")
+	}
+	transport := &http.Transport{TLSClientConfig: &tls.Config{MinVersion: tls.VersionTLS12}, TLSHandshakeTimeout: 5 * time.Second, ResponseHeaderTimeout: 5 * time.Second}
+	return &EvidenceClient{Endpoint: strings.TrimRight(endpoint, "/"), Signer: signer, HTTP: &http.Client{Transport: transport, Timeout: 8 * time.Second}}, nil
+}
+
+func (c EvidenceClient) Refresh(ctx context.Context, db *gorm.DB, status EvidenceStatus) error {
+	path := "/v1/evidence/" + status.EvidenceID
+	token, err := c.Signer.Mint("yovision-sense", []string{"evidence:read"}, http.MethodGet, path, nil)
+	if err != nil {
+		return c.degrade(db, status, "unavailable", "machine_identity_error")
+	}
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, c.Endpoint+path, nil)
+	if err != nil {
+		return c.degrade(db, status, "unavailable", "invalid_request")
+	}
+	request.Header.Set("Authorization", "Bearer "+token)
+	request.Header.Set("X-Request-ID", newCorrelationID())
+	response, err := c.HTTP.Do(request)
+	if err != nil {
+		code := "evidence_unavailable"
+		if errors.Is(err, context.DeadlineExceeded) || errors.Is(ctx.Err(), context.DeadlineExceeded) {
+			code = "evidence_timeout"
+		}
+		return c.degrade(db, status, "unavailable", code)
+	}
+	defer response.Body.Close()
+	body, readErr := io.ReadAll(io.LimitReader(response.Body, 64*1024+1))
+	if readErr != nil || len(body) > 64*1024 {
+		return c.degrade(db, status, "unavailable", "invalid_evidence_response")
+	}
+	if response.StatusCode == http.StatusNotFound {
+		return c.degrade(db, status, "unavailable", "evidence_not_found")
+	}
+	if response.StatusCode == http.StatusGone {
+		return c.degrade(db, status, "expired", "evidence_expired")
+	}
+	if response.StatusCode != http.StatusOK {
+		return c.degrade(db, status, "unavailable", "evidence_unavailable")
+	}
+	decoder := json.NewDecoder(bytes.NewReader(body))
+	decoder.DisallowUnknownFields()
+	var evidence Evidence
+	if err = decoder.Decode(&evidence); err != nil || evidence.EvidenceID != status.EvidenceID || evidence.OwnerID != status.OwnerID || validateEvidence(evidence) != nil {
+		return c.degrade(db, status, "unavailable", "invalid_evidence_response")
+	}
+	canonical, err := canonicalJSON(body)
+	if err != nil {
+		return c.degrade(db, status, "unavailable", "invalid_evidence_response")
+	}
+	now := time.Now().UTC()
+	var expiresAt *time.Time
+	if evidence.ExpiresAt != "" {
+		parsedExpiry, parseErr := time.Parse(time.RFC3339Nano, evidence.ExpiresAt)
+		if parseErr != nil {
+			return c.degrade(db, status, "unavailable", "invalid_evidence_response")
+		}
+		parsedExpiry = parsedExpiry.UTC()
+		expiresAt = &parsedExpiry
+	}
+	return db.Model(&EvidenceStatus{}).Where("event_id = ? AND evidence_id = ?", status.EventID, status.EvidenceID).Updates(map[string]any{"status": evidence.Status, "resolution": "current", "current_payload": canonical, "last_error": "", "expires_at": expiresAt, "checked_at": now, "updated_at": now}).Error
+}
+
+func (c EvidenceClient) degrade(db *gorm.DB, status EvidenceStatus, resolution, code string) error {
+	now := time.Now().UTC()
+	return db.Model(&EvidenceStatus{}).Where("event_id = ? AND evidence_id = ?", status.EventID, status.EvidenceID).Updates(map[string]any{"resolution": resolution, "last_error": code, "checked_at": now, "updated_at": now}).Error
+}
+
+func newCorrelationID() string {
+	raw := make([]byte, 16)
+	if _, err := rand.Read(raw); err != nil {
+		return "request-id-fallback"
+	}
+	return base64.RawURLEncoding.EncodeToString(raw)
+}
+
+func LoadEvidenceClient(getenv func(string) string) (*EvidenceClient, error) {
+	key, err := machine_identity.LoadPrivateKey(getenv("BELL_SENSE_PRIVATE_KEY_PATH"))
+	if err != nil {
+		return nil, fmt.Errorf("load Bell evidence key: %w", err)
+	}
+	signer := machine_identity.Signer{Principal: strings.TrimSpace(getenv("BELL_SENSE_PRINCIPAL_ID")), KeyID: strings.TrimSpace(getenv("BELL_SENSE_KEY_ID")), PrivateKey: key}
+	return NewEvidenceClient(strings.TrimSpace(getenv("BELL_SENSE_EVIDENCE_ENDPOINT")), signer)
+}

Bell/server/app/bell/integration/event_ingress/handler.go

@@ -0,0 +1,107 @@
+package event_ingress
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"regexp"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+
+	"go-admin/app/bell/integration/machine_identity"
+)
+
+const MaxRequestBytes = 64 * 1024
+
+var requestIDPattern = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9._:-]{15,127}$`)
+
+type Handler struct {
+	DB       *gorm.DB
+	Verifier machine_identity.Verifier
+	Enabled  bool
+	Resolver EvidenceRefresher
+}
+
+func (h Handler) Post(c *gin.Context) {
+	if !h.Enabled {
+		writeProblem(c, http.StatusServiceUnavailable, "connector_disabled", "event connector is disabled", "")
+		return
+	}
+	requestID := c.GetHeader("X-Request-ID")
+	if requestID == "" {
+		requestID = uuid.NewString()
+	} else if !requestIDPattern.MatchString(requestID) {
+		writeProblem(c, http.StatusBadRequest, "invalid_request_id", "X-Request-ID must be an opaque 16-128 character value", "")
+		return
+	}
+	c.Header("X-Request-ID", requestID)
+	if c.Request.URL.RawQuery != "" || c.Request.URL.Fragment != "" || c.Request.URL.EscapedPath() != "/v1/events" {
+		writeProblem(c, http.StatusBadRequest, "invalid_request_target", "event request target must be the normalized /v1/events path", "")
+		return
+	}
+	if relayHeader := c.GetHeader("X-YoVision-Relay-ID"); relayHeader != "" {
+		relayID := strings.TrimSpace(relayHeader)
+		if relayID != relayHeader || !validID(relayID) {
+			writeProblem(c, http.StatusBadRequest, "invalid_event", "relay identity header is invalid", "")
+			return
+		}
+	}
+	body, err := io.ReadAll(http.MaxBytesReader(c.Writer, c.Request.Body, MaxRequestBytes))
+	if err != nil {
+		writeProblem(c, http.StatusBadRequest, "invalid_event", "event payload is invalid or too large", "")
+		return
+	}
+	token, err := machine_identity.BearerToken(c.GetHeader("Authorization"))
+	if err != nil {
+		writeProblem(c, http.StatusUnauthorized, machineErrorCode(err), "machine identity was rejected", "")
+		return
+	}
+	if _, err = h.Verifier.Verify(token, "yovision-bell", "events:ingest", c.Request.Method, c.Request.URL.EscapedPath(), body); err != nil {
+		status := http.StatusUnauthorized
+		code := machineErrorCode(err)
+		if code == "machine_scope_denied" || code == "machine_audience_denied" {
+			status = http.StatusForbidden
+		}
+		writeProblem(c, status, code, "machine identity was rejected", "")
+		return
+	}
+	parsed, err := ParseEvent(body)
+	if err != nil {
+		if errors.Is(err, ErrUnsupportedSchema) {
+			writeProblem(c, http.StatusUnprocessableEntity, "unsupported_schema_version", "event schema version is unsupported", "")
+			return
+		}
+		writeProblem(c, http.StatusBadRequest, "invalid_event", "event payload failed validation", "")
+		return
+	}
+	result, err := (Service{DB: h.DB, Resolver: h.Resolver}).Ingest(c.Request.Context(), parsed)
+	if errors.Is(err, ErrIdempotencyConflict) {
+		writeProblem(c, http.StatusConflict, "idempotency_conflict", "idempotency key is already bound to another payload", result.EventID)
+		return
+	}
+	if err != nil {
+		writeProblem(c, http.StatusServiceUnavailable, "ingest_unavailable", "event ingest is temporarily unavailable", "")
+		return
+	}
+	status := http.StatusCreated
+	if result.Disposition == "duplicate" {
+		status = http.StatusOK
+	}
+	c.JSON(status, result)
+}
+
+func writeProblem(c *gin.Context, status int, code, message, existing string) {
+	c.Header("Content-Type", "application/problem+json")
+	c.JSON(status, Problem{Code: code, Message: message, ExistingEventID: existing})
+}
+
+func machineErrorCode(err error) string {
+	var machineErr *machine_identity.Error
+	if errors.As(err, &machineErr) {
+		return machineErr.Code
+	}
+	return "machine_token_invalid"
+}

Bell/server/app/bell/integration/event_ingress/model.go

@@ -0,0 +1,116 @@
+package event_ingress
+
+import (
+	"encoding/json"
+	"time"
+)
+
+const (
+	EventSchemaVersion    = "yovision.event/v1"
+	EvidenceSchemaVersion = "yovision.evidence-reference/v1"
+)
+
+type Event struct {
+	SchemaVersion string      `json:"schema_version"`
+	ProducerID    string      `json:"producer_id"`
+	SourceEventID string      `json:"source_event_id"`
+	SiteRef       string      `json:"site_ref"`
+	DeviceRef     string      `json:"device_ref"`
+	ProfileRef    string      `json:"profile_ref"`
+	EventType     string      `json:"event_type"`
+	OccurredAt    string      `json:"occurred_at"`
+	Severity      string      `json:"severity"`
+	Rule          Rule        `json:"rule"`
+	Model         Model       `json:"model"`
+	Observation   Observation `json:"observation"`
+	Region        Region      `json:"region"`
+	Evidence      []Evidence  `json:"evidence"`
+}
+
+type Rule struct {
+	RuleID  string `json:"rule_id"`
+	Version string `json:"version"`
+}
+
+type Model struct {
+	Name    string `json:"name"`
+	Version string `json:"version"`
+}
+
+type Observation struct {
+	TrackID        string    `json:"track_id"`
+	Category       string    `json:"category"`
+	Confidence     float64   `json:"confidence"`
+	BBoxNormalized []float64 `json:"bbox_normalized,omitempty"`
+}
+
+type Region struct {
+	RegionID          string `json:"region_id"`
+	Kind              string `json:"kind"`
+	CrossingDirection string `json:"crossing_direction,omitempty"`
+}
+
+type Evidence struct {
+	SchemaVersion   string             `json:"schema_version"`
+	EvidenceID      string             `json:"evidence_id"`
+	OwnerID         string             `json:"owner_id"`
+	Type            string             `json:"type"`
+	Status          string             `json:"status"`
+	CapturedAt      string             `json:"captured_at"`
+	StatusUpdatedAt string             `json:"status_updated_at"`
+	ExpiresAt       string             `json:"expires_at,omitempty"`
+	ContentType     string             `json:"content_type,omitempty"`
+	Integrity       *EvidenceIntegrity `json:"integrity,omitempty"`
+	Failure         *EvidenceFailure   `json:"failure,omitempty"`
+}
+
+type EvidenceIntegrity struct {
+	Algorithm string `json:"algorithm"`
+	Digest    string `json:"digest"`
+	SizeBytes int64  `json:"size_bytes"`
+}
+
+type EvidenceFailure struct {
+	Code      string `json:"code"`
+	Retryable bool   `json:"retryable"`
+}
+
+type IngestResult struct {
+	EventID       string `json:"event_id"`
+	ProducerID    string `json:"producer_id"`
+	SourceEventID string `json:"source_event_id"`
+	Disposition   string `json:"disposition"`
+	PayloadSHA256 string `json:"payload_sha256"`
+}
+
+type Problem struct {
+	Code            string `json:"code"`
+	Message         string `json:"message"`
+	Field           string `json:"field,omitempty"`
+	ExistingEventID string `json:"existing_event_id,omitempty"`
+}
+
+type ParsedEvent struct {
+	Event     Event
+	Canonical json.RawMessage
+	Digest    string
+	Occurred  time.Time
+}
+
+// EvidenceStatus is mutable Bell-owned resolution metadata kept separately
+// from the immutable Event and from Alert acknowledgement/close facts.
+type EvidenceStatus struct {
+	EventID        string          `gorm:"type:uuid;primaryKey"`
+	EvidenceID     string          `gorm:"size:128;primaryKey"`
+	OwnerID        string          `gorm:"size:128;not null;index"`
+	Status         string          `gorm:"size:16;not null"`
+	Resolution     string          `gorm:"size:16;not null;index"`
+	CurrentPayload json.RawMessage `gorm:"column:current_payload;type:jsonb;not null"`
+	LastError      string          `gorm:"size:64;not null;default:''"`
+	ExpiresAt      *time.Time      `gorm:"index"`
+	CheckedAt      *time.Time
+	CreatedAt      time.Time `gorm:"not null"`
+	UpdatedAt      time.Time `gorm:"not null"`
+}
+
+func (EvidenceStatus) TableName() string { return "bell_evidence_status" }

Bell/server/app/bell/integration/event_ingress/replay.go

@@ -0,0 +1,42 @@
+package event_ingress
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+// ReplayToken is Bell-owned security state. It is intentionally separate from
+// business Receipt idempotency and remains effective across process restarts.
+type ReplayToken struct {
+	Principal string    `gorm:"size:128;primaryKey"`
+	TokenID   string    `gorm:"size:64;primaryKey"`
+	ExpiresAt time.Time `gorm:"not null;index"`
+	CreatedAt time.Time `gorm:"not null"`
+}
+
+func (ReplayToken) TableName() string { return "bell_machine_token_replays" }
+
+type PersistentReplayStore struct{ DB *gorm.DB }
+
+func (s PersistentReplayStore) Consume(principal, tokenID string, expiresAt, now time.Time) bool {
+	if s.DB == nil {
+		return false
+	}
+	accepted := false
+	err := s.DB.Transaction(func(tx *gorm.DB) error {
+		if err := tx.Where("expires_at <= ?", now.UTC()).Delete(&ReplayToken{}).Error; err != nil {
+			return err
+		}
+		result := tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&ReplayToken{
+			Principal: principal, TokenID: tokenID, ExpiresAt: expiresAt.UTC(), CreatedAt: now.UTC(),
+		})
+		if result.Error != nil {
+			return result.Error
+		}
+		accepted = result.RowsAffected == 1
+		return nil
+	})
+	return err == nil && accepted
+}

Bell/server/app/bell/integration/event_ingress/runtime.go

@@ -0,0 +1,40 @@
+package event_ingress
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-admin-team/go-admin-core/sdk"
+
+	"go-admin/app/bell/integration/machine_identity"
+)
+
+func RegisterRuntime(engine *gin.Engine) error {
+	enabled := strings.EqualFold(strings.TrimSpace(os.Getenv("BELL_EVENT_INGRESS_ENABLED")), "true")
+	if !enabled {
+		return nil
+	}
+	db := sdk.Runtime.GetDbByKey("")
+	if db == nil {
+		return fmt.Errorf("Bell event ingress database is unavailable")
+	}
+	if !db.Migrator().HasTable(&ReplayToken{}) || !db.Migrator().HasTable(&EvidenceStatus{}) {
+		return fmt.Errorf("Bell event ingress migration is required")
+	}
+	registry, err := machine_identity.LoadRegistry(os.Getenv("BELL_MACHINE_PRINCIPAL_REGISTRY"), "yovision-bell")
+	if err != nil {
+		return fmt.Errorf("load Bell machine identity registry: %w", err)
+	}
+	var resolver EvidenceRefresher
+	if strings.EqualFold(strings.TrimSpace(os.Getenv("BELL_EVIDENCE_RESOLVER_ENABLED")), "true") {
+		resolver, err = LoadEvidenceClient(os.Getenv)
+		if err != nil {
+			return fmt.Errorf("load Bell evidence resolver: %w", err)
+		}
+	}
+	handler := Handler{DB: db, Enabled: true, Resolver: resolver, Verifier: machine_identity.Verifier{Registry: registry, Replay: PersistentReplayStore{DB: db}}}
+	engine.POST("/v1/events", handler.Post)
+	return nil
+}

Bell/server/app/bell/integration/event_ingress/service.go

@@ -0,0 +1,125 @@
+package event_ingress
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+
+	"go-admin/app/bell/event"
+	"go-admin/app/bell/receipt"
+)
+
+var ErrIdempotencyConflict = errors.New("idempotency_conflict")
+
+type EvidenceRefresher interface {
+	Refresh(context.Context, *gorm.DB, EvidenceStatus) error
+}
+
+type Service struct {
+	DB       *gorm.DB
+	Resolver EvidenceRefresher
+}
+
+func (s Service) Ingest(ctx context.Context, parsed ParsedEvent) (IngestResult, error) {
+	if s.DB == nil {
+		return IngestResult{}, errors.New("event database is unavailable")
+	}
+	var output IngestResult
+	err := s.DB.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		if tx.Dialector.Name() == "postgres" {
+			key := fmt.Sprintf("%d:%s:%s", len(parsed.Event.ProducerID), parsed.Event.ProducerID, parsed.Event.SourceEventID)
+			if err := tx.Exec("SELECT pg_advisory_xact_lock(hashtextextended(?, 0))", key).Error; err != nil {
+				return err
+			}
+		}
+		var existing struct {
+			EventID       string
+			PayloadSHA256 string
+		}
+		err := tx.Model(&receipt.Receipt{}).Clauses(clause.Locking{Strength: "UPDATE"}).
+			Select("event_id", "payload_sha256").Where("producer_id = ? AND source_event_id = ?", parsed.Event.ProducerID, parsed.Event.SourceEventID).First(&existing).Error
+		if err == nil {
+			if existing.PayloadSHA256 != parsed.Digest {
+				output.EventID = existing.EventID
+				return ErrIdempotencyConflict
+			}
+			output = IngestResult{EventID: existing.EventID, ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID, Disposition: "duplicate", PayloadSHA256: parsed.Digest}
+			return tx.Create(&receipt.IngestAudit{ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID, PayloadSHA256: parsed.Digest, Outcome: receipt.OutcomeReplay, ActorID: 0, CreatedAt: time.Now().UTC()}).Error
+		}
+		if !errors.Is(err, gorm.ErrRecordNotFound) {
+			return err
+		}
+		now := time.Now().UTC()
+		eventID := uuid.NewString()
+		var evidenceRef *string
+		if len(parsed.Event.Evidence) > 0 {
+			value := parsed.Event.Evidence[0].EvidenceID
+			evidenceRef = &value
+		}
+		item := event.Event{ID: eventID, ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID,
+			EventType: parsed.Event.EventType, OccurredAt: parsed.Occurred, Location: parsed.Event.SiteRef + "/" + parsed.Event.DeviceRef,
+			Severity: parsed.Event.Severity, EvidenceRef: evidenceRef, NormalizedPayload: parsed.Canonical, PayloadSHA256: parsed.Digest, ReceivedAt: now}
+		receiptItem := receipt.Receipt{ID: uuid.NewString(), EventID: eventID, ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID, PayloadSHA256: parsed.Digest, AcceptedAt: now}
+		if err := tx.Create(&item).Error; err != nil {
+			return err
+		}
+		if err := tx.Create(&receiptItem).Error; err != nil {
+			return err
+		}
+		for _, evidence := range parsed.Event.Evidence {
+			payload, marshalErr := json.Marshal(evidence)
+			if marshalErr != nil {
+				return marshalErr
+			}
+			canonical, canonicalErr := canonicalJSON(payload)
+			if canonicalErr != nil {
+				return canonicalErr
+			}
+			var expiresAt *time.Time
+			if evidence.ExpiresAt != "" {
+				parsedExpiry, parseErr := time.Parse(time.RFC3339Nano, evidence.ExpiresAt)
+				if parseErr != nil {
+					return parseErr
+				}
+				parsedExpiry = parsedExpiry.UTC()
+				expiresAt = &parsedExpiry
+			}
+			status := EvidenceStatus{EventID: eventID, EvidenceID: evidence.EvidenceID, OwnerID: evidence.OwnerID,
+				Status: evidence.Status, Resolution: "snapshot", CurrentPayload: canonical, ExpiresAt: expiresAt, CreatedAt: now, UpdatedAt: now}
+			if err := tx.Create(&status).Error; err != nil {
+				return err
+			}
+		}
+		if err := tx.Create(&receipt.IngestAudit{ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID, PayloadSHA256: parsed.Digest, Outcome: receipt.OutcomeAccepted, ActorID: 0, CreatedAt: now}).Error; err != nil {
+			return err
+		}
+		output = IngestResult{EventID: eventID, ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID, Disposition: "created", PayloadSHA256: parsed.Digest}
+		return nil
+	})
+	if errors.Is(err, ErrIdempotencyConflict) {
+		auditErr := s.DB.WithContext(ctx).Create(&receipt.IngestAudit{ProducerID: parsed.Event.ProducerID, SourceEventID: parsed.Event.SourceEventID, PayloadSHA256: parsed.Digest, Outcome: receipt.OutcomeConflict, ActorID: 0, CreatedAt: time.Now().UTC()}).Error
+		if auditErr != nil {
+			return IngestResult{}, fmt.Errorf("record conflict audit: %w", auditErr)
+		}
+		return output, ErrIdempotencyConflict
+	}
+	if err != nil || s.Resolver == nil {
+		return output, err
+	}
+	var statuses []EvidenceStatus
+	if err = s.DB.WithContext(ctx).Where("event_id = ?", output.EventID).Find(&statuses).Error; err != nil {
+		return IngestResult{}, err
+	}
+	for _, status := range statuses {
+		// Evidence lookup is supplementary. The immutable Event/Receipt boundary
+		// remains accepted even when Sense is unavailable.
+		_ = s.Resolver.Refresh(ctx, s.DB.WithContext(ctx), status)
+	}
+	return output, nil
+}

Bell/server/app/bell/integration/event_ingress/validation.go

@@ -0,0 +1,217 @@
+package event_ingress
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	ErrInvalidEvent      = errors.New("invalid_event")
+	ErrUnsupportedSchema = errors.New("unsupported_schema_version")
+	identifierPattern    = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9._:-]{0,127}$`)
+	hexDigestPattern     = regexp.MustCompile(`^[a-f0-9]{64}$`)
+)
+
+func ParseEvent(raw []byte) (ParsedEvent, error) {
+	var event Event
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(&event); err != nil {
+		return ParsedEvent{}, fmt.Errorf("%w: malformed or unknown member", ErrInvalidEvent)
+	}
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		return ParsedEvent{}, fmt.Errorf("%w: trailing JSON value", ErrInvalidEvent)
+	}
+	if event.SchemaVersion == "" {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if event.SchemaVersion != EventSchemaVersion {
+		return ParsedEvent{}, ErrUnsupportedSchema
+	}
+	occurred, err := time.Parse("2006-01-02T15:04:05.000Z", event.OccurredAt)
+	if err != nil || !validID(event.ProducerID) || !validID(event.SourceEventID) || !validID(event.SiteRef) ||
+		!validID(event.DeviceRef) || !validID(event.ProfileRef) || !validID(event.Rule.RuleID) ||
+		!validID(event.Observation.TrackID) || !validID(event.Region.RegionID) || event.Rule.Version == "" ||
+		len(event.Rule.Version) > 64 || event.Model.Name == "" || len(event.Model.Name) > 128 ||
+		event.Model.Version == "" || len(event.Model.Version) > 64 || event.Observation.Confidence < 0 ||
+		event.Observation.Confidence > 1 || math.IsNaN(event.Observation.Confidence) || math.IsInf(event.Observation.Confidence, 0) {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if event.EventType != "dangerous_area_entered" && event.EventType != "directional_line_crossed" {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if event.Severity != "low" && event.Severity != "medium" && event.Severity != "high" && event.Severity != "critical" {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if event.Observation.Category != "person" && event.Observation.Category != "vehicle" && event.Observation.Category != "other" {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if len(event.Observation.BBoxNormalized) != 0 && len(event.Observation.BBoxNormalized) != 4 {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	for _, value := range event.Observation.BBoxNormalized {
+		if value < 0 || value > 1 || math.IsNaN(value) || math.IsInf(value, 0) {
+			return ParsedEvent{}, ErrInvalidEvent
+		}
+	}
+	if (event.EventType == "dangerous_area_entered" && (event.Region.Kind != "area" || event.Region.CrossingDirection != "")) ||
+		(event.EventType == "directional_line_crossed" && (event.Region.Kind != "line" || (event.Region.CrossingDirection != "a_to_b" && event.Region.CrossingDirection != "b_to_a"))) {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if event.Evidence == nil || len(event.Evidence) > 8 {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	seenEvidence := map[string]bool{}
+	for _, evidence := range event.Evidence {
+		evidenceJSON, marshalErr := json.Marshal(evidence)
+		canonicalEvidence, canonicalErr := canonicalJSON(evidenceJSON)
+		if err := validateEvidence(evidence); err != nil || marshalErr != nil || canonicalErr != nil || seenEvidence[string(canonicalEvidence)] {
+			return ParsedEvent{}, ErrInvalidEvent
+		}
+		seenEvidence[string(canonicalEvidence)] = true
+	}
+	canonical, err := canonicalJSON(raw)
+	if err != nil {
+		return ParsedEvent{}, ErrInvalidEvent
+	}
+	if containsExplicitNull(raw) {
+		return ParsedEvent{}, fmt.Errorf("%w: optional members must be omitted", ErrInvalidEvent)
+	}
+	digest := sha256.Sum256(canonical)
+	return ParsedEvent{Event: event, Canonical: canonical, Digest: hex.EncodeToString(digest[:]), Occurred: occurred}, nil
+}
+
+func validateEvidence(value Evidence) error {
+	if value.SchemaVersion != EvidenceSchemaVersion || !validID(value.EvidenceID) || !validID(value.OwnerID) ||
+		(value.Type != "snapshot" && value.Type != "clip") {
+		return ErrInvalidEvent
+	}
+	if _, err := time.Parse(time.RFC3339Nano, value.CapturedAt); err != nil {
+		return ErrInvalidEvent
+	}
+	if _, err := time.Parse(time.RFC3339Nano, value.StatusUpdatedAt); err != nil {
+		return ErrInvalidEvent
+	}
+	if value.ExpiresAt != "" {
+		if _, err := time.Parse(time.RFC3339Nano, value.ExpiresAt); err != nil {
+			return ErrInvalidEvent
+		}
+	}
+	switch value.Status {
+	case "pending", "processing":
+		if value.ContentType != "" || value.Integrity != nil || value.Failure != nil {
+			return ErrInvalidEvent
+		}
+	case "success":
+		if value.Integrity == nil || value.Failure != nil || (value.ContentType != "image/jpeg" && value.ContentType != "image/png" && value.ContentType != "video/mp4") ||
+			value.Integrity.Algorithm != "sha256" || !hexDigestPattern.MatchString(value.Integrity.Digest) || value.Integrity.SizeBytes < 0 {
+			return ErrInvalidEvent
+		}
+	case "failed":
+		if value.Failure == nil || value.ContentType != "" || value.Integrity != nil ||
+			(value.Failure.Code != "capture_failed" && value.Failure.Code != "processing_failed" && value.Failure.Code != "expired" && value.Failure.Code != "unavailable") {
+			return ErrInvalidEvent
+		}
+	default:
+		return ErrInvalidEvent
+	}
+	return nil
+}
+
+func canonicalJSON(raw []byte) ([]byte, error) {
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.UseNumber()
+	var value any
+	if err := decoder.Decode(&value); err != nil {
+		return nil, err
+	}
+	value, err := normalizeJCSNumbers(value)
+	if err != nil {
+		return nil, err
+	}
+	var buffer bytes.Buffer
+	encoder := json.NewEncoder(&buffer)
+	encoder.SetEscapeHTML(false)
+	if err := encoder.Encode(value); err != nil {
+		return nil, err
+	}
+	canonical := bytes.TrimSuffix(buffer.Bytes(), []byte("\n"))
+	canonical = bytes.ReplaceAll(canonical, []byte(`\u2028`), []byte("\u2028"))
+	canonical = bytes.ReplaceAll(canonical, []byte(`\u2029`), []byte("\u2029"))
+	return canonical, nil
+}
+
+func normalizeJCSNumbers(value any) (any, error) {
+	switch typed := value.(type) {
+	case json.Number:
+		number, err := strconv.ParseFloat(string(typed), 64)
+		if err != nil || math.IsNaN(number) || math.IsInf(number, 0) {
+			return nil, errors.New("JSON number is outside the RFC 8785 domain")
+		}
+		if number == 0 {
+			return float64(0), nil
+		}
+		return number, nil
+	case []any:
+		for index, item := range typed {
+			normalized, err := normalizeJCSNumbers(item)
+			if err != nil {
+				return nil, err
+			}
+			typed[index] = normalized
+		}
+	case map[string]any:
+		for key, item := range typed {
+			normalized, err := normalizeJCSNumbers(item)
+			if err != nil {
+				return nil, err
+			}
+			typed[key] = normalized
+		}
+	}
+	return value, nil
+}
+
+func containsExplicitNull(raw []byte) bool {
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.UseNumber()
+	var value any
+	if decoder.Decode(&value) != nil {
+		return true
+	}
+	return hasNull(value)
+}
+
+func hasNull(value any) bool {
+	switch typed := value.(type) {
+	case nil:
+		return true
+	case []any:
+		for _, item := range typed {
+			if hasNull(item) {
+				return true
+			}
+		}
+	case map[string]any:
+		for _, item := range typed {
+			if hasNull(item) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func validID(value string) bool {
+	return identifierPattern.MatchString(value) && !strings.ContainsAny(strings.ToLower(value), "\\/@")
+}

Bell/server/app/bell/integration/machine_identity/registry.go

@@ -0,0 +1,68 @@
+package machine_identity
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"io"
+	"os"
+	"strings"
+)
+
+type registryDocument struct {
+	Version    string              `json:"version"`
+	Audience   string              `json:"audience"`
+	Principals []registryPrincipal `json:"principals"`
+}
+
+type registryPrincipal struct {
+	PrincipalID string        `json:"principal_id"`
+	Enabled     bool          `json:"enabled"`
+	Keys        []registryKey `json:"keys"`
+}
+
+type registryKey struct {
+	KeyID     string   `json:"kid"`
+	PublicKey string   `json:"public_key_base64url"`
+	Status    string   `json:"status"`
+	Scopes    []string `json:"scopes"`
+}
+
+func LoadRegistry(filePath, expectedAudience string) (*Registry, error) {
+	if strings.TrimSpace(filePath) == "" || !validAudiences[expectedAudience] {
+		return nil, errors.New("machine principal registry path and audience are required")
+	}
+	raw, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, errors.New("read machine principal registry")
+	}
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.DisallowUnknownFields()
+	var document registryDocument
+	if err = decoder.Decode(&document); err != nil {
+		return nil, errors.New("invalid machine principal registry")
+	}
+	if err = decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		return nil, errors.New("invalid machine principal registry")
+	}
+	if document.Version != "yovision.machine-principal-registry/v1" || document.Audience != expectedAudience || len(document.Principals) == 0 {
+		return nil, errors.New("invalid machine principal registry")
+	}
+	records := make([]KeyRecord, 0)
+	for _, principal := range document.Principals {
+		if len(principal.Keys) == 0 {
+			return nil, errors.New("invalid machine principal registry")
+		}
+		for _, key := range principal.Keys {
+			publicKey, decodeErr := base64.RawURLEncoding.Strict().DecodeString(key.PublicKey)
+			if decodeErr != nil || len(publicKey) != ed25519.PublicKeySize || (key.Status != "active" && key.Status != "revoked") {
+				return nil, errors.New("invalid machine principal registry")
+			}
+			records = append(records, KeyRecord{Principal: principal.PrincipalID, KeyID: key.KeyID, PublicKey: ed25519.PublicKey(publicKey), Audience: document.Audience,
+				Scopes: key.Scopes, Enabled: principal.Enabled, Revoked: key.Status == "revoked"})
+		}
+	}
+	return NewRegistry(records...)
+}

Bell/server/app/bell/integration/machine_identity/token.go

@@ -0,0 +1,363 @@
+package machine_identity
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io"
+	"net/url"
+	"os"
+	"path"
+	"regexp"
+	"slices"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	principalPattern = regexp.MustCompile(`^yv:(sense|brain|bell):[a-z0-9][a-z0-9.-]{0,62}$`)
+	keyIDPattern     = regexp.MustCompile(`^[A-Za-z0-9._-]{8,64}$`)
+	tokenIDPattern   = regexp.MustCompile(`^[A-Za-z0-9_-]{22,64}$`)
+	validAudiences   = map[string]bool{"yovision-sense": true, "yovision-brain": true, "yovision-bell": true}
+	validScopes      = map[string]bool{"source-config:write": true, "runtime-status:write": true, "events:ingest": true, "evidence:read": true}
+)
+
+const (
+	Version       = "yovision.machine-identity/v1"
+	TokenType     = "YOVISION-MACHINE+JWT"
+	MaxLifetime   = 5 * time.Minute
+	AllowedSkew   = 30 * time.Second
+	MaxKeyOverlap = 24 * time.Hour
+)
+
+type Error struct{ Code string }
+
+func (e *Error) Error() string { return e.Code }
+
+func codeError(code string) error { return &Error{Code: code} }
+
+// BearerToken deliberately has no cookie or query fallback.
+func BearerToken(authorization string) (string, error) {
+	parts := strings.Split(authorization, " ")
+	if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") || parts[1] == "" || strings.ContainsAny(parts[1], " \t\r\n,") {
+		return "", codeError("machine_token_missing")
+	}
+	return parts[1], nil
+}
+
+type Claims struct {
+	Version    string   `json:"ver"`
+	Issuer     string   `json:"iss"`
+	Subject    string   `json:"sub"`
+	Audience   string   `json:"aud"`
+	Scopes     []string `json:"scope"`
+	IssuedAt   int64    `json:"iat"`
+	NotBefore  int64    `json:"nbf"`
+	ExpiresAt  int64    `json:"exp"`
+	TokenID    string   `json:"jti"`
+	Method     string   `json:"htm"`
+	Path       string   `json:"htu"`
+	BodySHA256 string   `json:"body_sha256"`
+}
+
+type protectedHeader struct {
+	Algorithm string `json:"alg"`
+	Type      string `json:"typ"`
+	KeyID     string `json:"kid"`
+	Version   string `json:"ver"`
+}
+
+type KeyRecord struct {
+	Principal string
+	KeyID     string
+	PublicKey ed25519.PublicKey
+	Audience  string
+	Scopes    []string
+	Enabled   bool
+	Revoked   bool
+}
+
+type Registry struct {
+	mu   sync.RWMutex
+	keys map[string]KeyRecord
+}
+
+func NewRegistry(records ...KeyRecord) (*Registry, error) {
+	r := &Registry{keys: make(map[string]KeyRecord, len(records))}
+	for _, record := range records {
+		if !keyIDPattern.MatchString(record.KeyID) || !principalPattern.MatchString(record.Principal) || !validAudiences[record.Audience] || len(record.PublicKey) != ed25519.PublicKeySize || !validScopeList(record.Scopes) {
+			return nil, errors.New("invalid machine key record")
+		}
+		if _, exists := r.keys[record.KeyID]; exists {
+			return nil, errors.New("duplicate machine key id")
+		}
+		record.PublicKey = slices.Clone(record.PublicKey)
+		record.Scopes = slices.Clone(record.Scopes)
+		r.keys[record.KeyID] = record
+	}
+	return r, nil
+}
+
+func (r *Registry) Lookup(keyID string) (KeyRecord, bool) {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	record, ok := r.keys[keyID]
+	record.PublicKey = slices.Clone(record.PublicKey)
+	record.Scopes = slices.Clone(record.Scopes)
+	return record, ok
+}
+
+func (r *Registry) Revoke(keyID string) bool {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	record, ok := r.keys[keyID]
+	if !ok {
+		return false
+	}
+	record.Revoked = true
+	r.keys[keyID] = record
+	return true
+}
+
+type ReplayStore struct {
+	mu   sync.Mutex
+	used map[string]time.Time
+}
+
+// ReplayCache must atomically persist accepted (principal, jti) pairs until
+// expiry. ReplayStore is process-local and intended for tests or a single
+// uninterrupted process; connector implementations inject a durable store.
+type ReplayCache interface {
+	Consume(principal, tokenID string, expiresAt, now time.Time) bool
+}
+
+func NewReplayStore() *ReplayStore { return &ReplayStore{used: map[string]time.Time{}} }
+
+func (s *ReplayStore) Consume(principal, tokenID string, expiresAt, now time.Time) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	for key, expiry := range s.used {
+		if !expiry.After(now) {
+			delete(s.used, key)
+		}
+	}
+	key := principal + "\x00" + tokenID
+	if _, exists := s.used[key]; exists {
+		return false
+	}
+	s.used[key] = expiresAt
+	return true
+}
+
+type Signer struct {
+	Principal  string
+	KeyID      string
+	PrivateKey ed25519.PrivateKey
+	Now        func() time.Time
+}
+
+func LoadPrivateKey(path string) (ed25519.PrivateKey, error) {
+	if strings.TrimSpace(path) == "" {
+		return nil, errors.New("machine private key path is required")
+	}
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return nil, errors.New("read machine private key")
+	}
+	block, rest := pem.Decode(raw)
+	if block == nil || len(bytes.TrimSpace(rest)) != 0 || block.Type != "PRIVATE KEY" {
+		return nil, errors.New("machine private key must be one PKCS#8 PEM block")
+	}
+	parsed, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, errors.New("parse machine private key")
+	}
+	key, ok := parsed.(ed25519.PrivateKey)
+	if !ok || len(key) != ed25519.PrivateKeySize {
+		return nil, errors.New("machine private key is not Ed25519")
+	}
+	return slices.Clone(key), nil
+}
+
+func (s Signer) Mint(audience string, scopes []string, method, requestPath string, body []byte) (string, error) {
+	if !principalPattern.MatchString(s.Principal) || !keyIDPattern.MatchString(s.KeyID) || len(s.PrivateKey) != ed25519.PrivateKeySize || !validAudiences[audience] || !validScopeList(scopes) {
+		return "", errors.New("incomplete machine signer configuration")
+	}
+	normalizedPath, err := normalizePath(requestPath)
+	if err != nil {
+		return "", err
+	}
+	method = strings.ToUpper(method)
+	if !allowedMethod(method) {
+		return "", errors.New("unsupported machine request method")
+	}
+	now := time.Now().UTC()
+	if s.Now != nil {
+		now = s.Now().UTC()
+	}
+	tokenID, err := randomTokenID()
+	if err != nil {
+		return "", err
+	}
+	digest := sha256.Sum256(body)
+	claims := Claims{Version: Version, Issuer: s.Principal, Subject: s.Principal, Audience: audience,
+		Scopes: slices.Clone(scopes), IssuedAt: now.Unix(), NotBefore: now.Unix(), ExpiresAt: now.Add(MaxLifetime).Unix(),
+		TokenID: tokenID, Method: method, Path: normalizedPath, BodySHA256: hex.EncodeToString(digest[:])}
+	header := protectedHeader{Algorithm: "EdDSA", Type: TokenType, KeyID: s.KeyID, Version: Version}
+	headerJSON, _ := json.Marshal(header)
+	claimsJSON, _ := json.Marshal(claims)
+	signingInput := rawBase64(headerJSON) + "." + rawBase64(claimsJSON)
+	signature := ed25519.Sign(s.PrivateKey, []byte(signingInput))
+	return signingInput + "." + rawBase64(signature), nil
+}
+
+type Verifier struct {
+	Registry *Registry
+	Replay   ReplayCache
+	Now      func() time.Time
+}
+
+func (v Verifier) Verify(token, audience, requiredScope, method, requestPath string, body []byte) (Claims, error) {
+	if v.Registry == nil || v.Replay == nil {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	parts := strings.Split(token, ".")
+	if len(parts) != 3 || strings.Contains(token, "=") {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	headerBytes, err := decodeRaw(parts[0])
+	if err != nil {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	var header protectedHeader
+	if err = decodeClosed(headerBytes, &header); err != nil || header.Algorithm != "EdDSA" || header.Type != TokenType || header.Version != Version || !keyIDPattern.MatchString(header.KeyID) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	record, ok := v.Registry.Lookup(header.KeyID)
+	if !ok {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	signature, err := decodeRaw(parts[2])
+	if err != nil || len(signature) != ed25519.SignatureSize || !ed25519.Verify(record.PublicKey, []byte(parts[0]+"."+parts[1]), signature) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	if !record.Enabled || record.Revoked {
+		return Claims{}, codeError("machine_identity_revoked")
+	}
+	claimsBytes, err := decodeRaw(parts[1])
+	if err != nil {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	var claims Claims
+	if err = decodeClosed(claimsBytes, &claims); err != nil || !validClaimsShape(claims) || claims.Issuer != record.Principal || claims.Subject != record.Principal {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	now := time.Now().UTC()
+	if v.Now != nil {
+		now = v.Now().UTC()
+	}
+	nowUnix := now.Unix()
+	if claims.ExpiresAt-claims.IssuedAt <= 0 || claims.ExpiresAt-claims.IssuedAt > int64(MaxLifetime/time.Second) ||
+		claims.NotBefore < claims.IssuedAt || claims.NotBefore > claims.ExpiresAt || claims.IssuedAt > nowUnix+int64(AllowedSkew/time.Second) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	if claims.NotBefore > nowUnix+int64(AllowedSkew/time.Second) || claims.ExpiresAt < nowUnix-int64(AllowedSkew/time.Second) {
+		return Claims{}, codeError("machine_token_expired")
+	}
+	if claims.Audience != audience || record.Audience != audience {
+		return Claims{}, codeError("machine_audience_denied")
+	}
+	if !slices.Contains(claims.Scopes, requiredScope) || !slices.Contains(record.Scopes, requiredScope) {
+		return Claims{}, codeError("machine_scope_denied")
+	}
+	normalizedPath, err := normalizePath(requestPath)
+	digest := sha256.Sum256(body)
+	if err != nil || claims.Method != strings.ToUpper(method) || claims.Path != normalizedPath || claims.BodySHA256 != hex.EncodeToString(digest[:]) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	if !v.Replay.Consume(claims.Issuer, claims.TokenID, time.Unix(claims.ExpiresAt, 0).Add(AllowedSkew), now) {
+		return Claims{}, codeError("machine_token_replayed")
+	}
+	return claims, nil
+}
+
+func decodeClosed(raw []byte, target any) error {
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(target); err != nil {
+		return err
+	}
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		if err == nil {
+			return errors.New("trailing JSON value")
+		}
+		return err
+	}
+	return nil
+}
+
+func validClaimsShape(claims Claims) bool {
+	if claims.Version != Version || !principalPattern.MatchString(claims.Issuer) || claims.Subject != claims.Issuer || !validAudiences[claims.Audience] || !tokenIDPattern.MatchString(claims.TokenID) ||
+		len(claims.Scopes) == 0 || len(claims.Scopes) > 4 || !allowedMethod(claims.Method) || claims.Path == "" || len(claims.BodySHA256) != 64 {
+		return false
+	}
+	if !validScopeList(claims.Scopes) {
+		return false
+	}
+	_, err := hex.DecodeString(claims.BodySHA256)
+	return err == nil
+}
+
+func validScopeList(scopes []string) bool {
+	if len(scopes) == 0 || len(scopes) > 4 {
+		return false
+	}
+	seen := map[string]bool{}
+	for _, scope := range scopes {
+		if !validScopes[scope] || seen[scope] {
+			return false
+		}
+		seen[scope] = true
+	}
+	return true
+}
+
+func normalizePath(value string) (string, error) {
+	parsed, err := url.ParseRequestURI(value)
+	if err != nil || parsed.IsAbs() || parsed.Host != "" || parsed.RawQuery != "" || parsed.Fragment != "" || parsed.Path == "" || !strings.HasPrefix(parsed.Path, "/") || strings.Contains(parsed.Path, "\\") || strings.Contains(parsed.Path, "//") || path.Clean(parsed.Path) != parsed.Path {
+		return "", errors.New("machine request path must be a normalized absolute path without query or fragment")
+	}
+	return parsed.EscapedPath(), nil
+}
+
+func allowedMethod(method string) bool {
+	switch method {
+	case "GET", "POST", "PUT", "PATCH", "DELETE":
+		return true
+	default:
+		return false
+	}
+}
+
+func randomTokenID() (string, error) {
+	raw := make([]byte, 16)
+	if _, err := rand.Read(raw); err != nil {
+		return "", fmt.Errorf("generate machine token id: %w", err)
+	}
+	return rawBase64(raw), nil
+}
+
+func rawBase64(value []byte) string { return base64.RawURLEncoding.EncodeToString(value) }
+
+func decodeRaw(value string) ([]byte, error) {
+	return base64.RawURLEncoding.Strict().DecodeString(value)
+}

Bell/server/app/bell/integration/machine_identity/token_test.go

@@ -0,0 +1,219 @@
+package machine_identity
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+type crossLanguageVector struct {
+	PublicKey string `json:"public_key_base64url"`
+	Token     string `json:"token"`
+	Now       int64  `json:"now"`
+	Audience  string `json:"audience"`
+	Scope     string `json:"required_scope"`
+	Method    string `json:"method"`
+	Path      string `json:"path"`
+	Body      string `json:"body_base64"`
+}
+
+func testIdentity(t *testing.T) (Signer, *Registry, time.Time) {
+	t.Helper()
+	publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := time.Unix(1_800_000_000, 0).UTC()
+	registry, err := NewRegistry(KeyRecord{Principal: "yv:sense:site-a", KeyID: "sense-key-0001", PublicKey: publicKey,
+		Audience: "yovision-brain", Scopes: []string{"source-config:write"}, Enabled: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return Signer{Principal: "yv:sense:site-a", KeyID: "sense-key-0001", PrivateKey: privateKey, Now: func() time.Time { return now }}, registry, now
+}
+
+func errorCode(t *testing.T, err error) string {
+	t.Helper()
+	var coded *Error
+	if !errors.As(err, &coded) {
+		t.Fatalf("expected coded error, got %v", err)
+	}
+	return coded.Code
+}
+
+func TestMintAndVerifyRequestBoundToken(t *testing.T) {
+	signer, registry, now := testIdentity(t)
+	body := []byte(`{"revision":7}`)
+	token, err := signer.Mint("yovision-brain", []string{"source-config:write"}, "POST", "/machine/v1/source-config", body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	verifier := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return now }}
+	claims, err := verifier.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if claims.Issuer != signer.Principal || claims.Subject != signer.Principal || claims.ExpiresAt-claims.IssuedAt != 300 {
+		t.Fatalf("unexpected claims: %+v", claims)
+	}
+}
+
+func TestBearerTokenHasNoCookieOrQueryFallback(t *testing.T) {
+	if token, err := BearerToken("Bearer compact.token.value"); err != nil || token != "compact.token.value" {
+		t.Fatal(err)
+	}
+	for _, value := range []string{"", "compact.token.value", "Bearer", "Bearer one two", "Cookie compact.token.value"} {
+		if _, err := BearerToken(value); errorCode(t, err) != "machine_token_missing" {
+			t.Fatalf("accepted %q", value)
+		}
+	}
+}
+
+func TestRejectsReplayWrongAudienceScopeAndRequest(t *testing.T) {
+	signer, registry, now := testIdentity(t)
+	body := []byte(`{"revision":7}`)
+	mint := func() string {
+		token, err := signer.Mint("yovision-brain", []string{"source-config:write"}, "POST", "/machine/v1/source-config", body)
+		if err != nil {
+			t.Fatal(err)
+		}
+		return token
+	}
+	verifier := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return now }}
+	token := mint()
+	if _, err := verifier.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_token_replayed" {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(mint(), "yovision-bell", "source-config:write", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_audience_denied" {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(mint(), "yovision-brain", "events:ingest", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_scope_denied" {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(mint(), "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", []byte("changed")); errorCode(t, err) != "machine_token_invalid" {
+		t.Fatal(err)
+	}
+}
+
+func TestExpiryRevocationAndRotation(t *testing.T) {
+	signer, registry, now := testIdentity(t)
+	body := []byte("{}")
+	token, _ := signer.Mint("yovision-brain", []string{"source-config:write"}, "POST", "/machine/v1/source-config", body)
+	expired := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return now.Add(6 * time.Minute) }}
+	if _, err := expired.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_token_expired" {
+		t.Fatal(err)
+	}
+
+	oldPublic, oldPrivate, _ := ed25519.GenerateKey(rand.Reader)
+	newPublic, newPrivate, _ := ed25519.GenerateKey(rand.Reader)
+	rotation, err := NewRegistry(
+		KeyRecord{Principal: "yv:brain:node-a", KeyID: "brain-old-0001", PublicKey: oldPublic, Audience: "yovision-sense", Scopes: []string{"runtime-status:write"}, Enabled: true},
+		KeyRecord{Principal: "yv:brain:node-a", KeyID: "brain-new-0002", PublicKey: newPublic, Audience: "yovision-sense", Scopes: []string{"runtime-status:write"}, Enabled: true},
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	oldSigner := Signer{Principal: "yv:brain:node-a", KeyID: "brain-old-0001", PrivateKey: oldPrivate, Now: func() time.Time { return now }}
+	newSigner := Signer{Principal: "yv:brain:node-a", KeyID: "brain-new-0002", PrivateKey: newPrivate, Now: func() time.Time { return now }}
+	oldToken, _ := oldSigner.Mint("yovision-sense", []string{"runtime-status:write"}, "POST", "/machine/v1/runtime-status", body)
+	newToken, _ := newSigner.Mint("yovision-sense", []string{"runtime-status:write"}, "POST", "/machine/v1/runtime-status", body)
+	verify := Verifier{Registry: rotation, Replay: NewReplayStore(), Now: func() time.Time { return now }}
+	if _, err = verify.Verify(oldToken, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", body); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = verify.Verify(newToken, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", body); err != nil {
+		t.Fatal(err)
+	}
+	if !rotation.Revoke("brain-old-0001") {
+		t.Fatal("old key was not revoked")
+	}
+	oldAfterRevoke, _ := oldSigner.Mint("yovision-sense", []string{"runtime-status:write"}, "POST", "/machine/v1/runtime-status", body)
+	if _, err = verify.Verify(oldAfterRevoke, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", body); errorCode(t, err) != "machine_identity_revoked" {
+		t.Fatal(err)
+	}
+}
+
+func TestTransportPolicyRejectsUnsafeTLS(t *testing.T) {
+	safe := TransportPolicy{TLSMinVersion: tls.VersionTLS12, VerifyCertificate: true, VerifyHostname: true,
+		ConnectTimeout: time.Second, ResponseHeaderTimeout: time.Second, RequestTimeout: 2 * time.Second, MaxRequestBytes: 1024}
+	if err := safe.Validate(); err != nil {
+		t.Fatal(err)
+	}
+	unsafe := safe
+	unsafe.VerifyHostname = false
+	if err := unsafe.Validate(); err == nil {
+		t.Fatal("unsafe hostname policy accepted")
+	}
+	unsafe = safe
+	unsafe.TLSMinVersion = tls.VersionTLS11
+	if err := unsafe.Validate(); err == nil {
+		t.Fatal("TLS 1.1 accepted")
+	}
+}
+
+func TestVerifiesCrossLanguageVector(t *testing.T) {
+	vectorPath := filepath.Join("..", "..", "..", "..", "..", "..", "contracts", "tests", "machine-identity-v1", "cross-language-vector.json")
+	raw, err := os.ReadFile(vectorPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var vector crossLanguageVector
+	if err = json.Unmarshal(raw, &vector); err != nil {
+		t.Fatal(err)
+	}
+	publicKey, err := base64.RawURLEncoding.DecodeString(vector.PublicKey)
+	if err != nil {
+		t.Fatal(err)
+	}
+	body, err := base64.StdEncoding.DecodeString(vector.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	registry, err := NewRegistry(KeyRecord{Principal: "yv:brain:vector", KeyID: "brain-vector-0001", PublicKey: ed25519.PublicKey(publicKey), Audience: vector.Audience, Scopes: []string{vector.Scope}, Enabled: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	verifier := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return time.Unix(vector.Now, 0) }}
+	claims, err := verifier.Verify(vector.Token, vector.Audience, vector.Scope, vector.Method, vector.Path, body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if claims.Issuer != "yv:brain:vector" {
+		t.Fatalf("unexpected issuer: %s", claims.Issuer)
+	}
+}
+
+func TestLoadsExternalPublicRegistryAndRejectsWrongAudience(t *testing.T) {
+	publicKey, _, _ := ed25519.GenerateKey(rand.Reader)
+	document := map[string]any{
+		"version": "yovision.machine-principal-registry/v1", "audience": "yovision-bell",
+		"principals": []any{map[string]any{"principal_id": "yv:sense:site-a", "enabled": true, "keys": []any{map[string]any{
+			"kid": "sense-key-0001", "public_key_base64url": base64.RawURLEncoding.EncodeToString(publicKey), "status": "active", "scopes": []string{"events:ingest"},
+		}}}},
+	}
+	raw, _ := json.Marshal(document)
+	file := filepath.Join(t.TempDir(), "principals.json")
+	if err := os.WriteFile(file, raw, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	registry, err := LoadRegistry(file, "yovision-bell")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if record, ok := registry.Lookup("sense-key-0001"); !ok || record.Principal != "yv:sense:site-a" {
+		t.Fatal("registry record missing")
+	}
+	if _, err = LoadRegistry(file, "yovision-sense"); err == nil {
+		t.Fatal("wrong registry audience accepted")
+	}
+}

Bell/server/app/bell/integration/machine_identity/transport.go

@@ -0,0 +1,39 @@
+package machine_identity
+
+import (
+	"crypto/tls"
+	"errors"
+	"net/http"
+	"time"
+)
+
+type TransportPolicy struct {
+	TLSMinVersion         uint16
+	VerifyCertificate     bool
+	VerifyHostname        bool
+	ConnectTimeout        time.Duration
+	ResponseHeaderTimeout time.Duration
+	RequestTimeout        time.Duration
+	MaxRequestBytes       int64
+}
+
+func (p TransportPolicy) Validate() error {
+	if p.TLSMinVersion < tls.VersionTLS12 || !p.VerifyCertificate || !p.VerifyHostname || p.ConnectTimeout < 100*time.Millisecond || p.ConnectTimeout > 30*time.Second ||
+		p.ResponseHeaderTimeout < 100*time.Millisecond || p.ResponseHeaderTimeout > 30*time.Second || p.RequestTimeout < 100*time.Millisecond || p.RequestTimeout > 60*time.Second ||
+		p.MaxRequestBytes < 1 || p.MaxRequestBytes > 10*1024*1024 {
+		return errors.New("machine transport policy is unsafe")
+	}
+	return nil
+}
+
+func (p TransportPolicy) HTTPClient() (*http.Client, error) {
+	if err := p.Validate(); err != nil {
+		return nil, err
+	}
+	transport := &http.Transport{
+		TLSClientConfig:       &tls.Config{MinVersion: p.TLSMinVersion},
+		TLSHandshakeTimeout:   p.ConnectTimeout,
+		ResponseHeaderTimeout: p.ResponseHeaderTimeout,
+	}
+	return &http.Client{Transport: transport, Timeout: p.RequestTimeout}, nil
+}

Bell/server/app/bell/router/registry.go

@@ -9,6 +9,7 @@ import (
 	"github.com/go-admin-team/go-admin-core/sdk/config"
 	jwt "github.com/go-admin-team/go-admin-core/sdk/pkg/jwtauth"
 
+	"go-admin/app/bell/integration/event_ingress"
 	"go-admin/app/bell/synthetic"
 	"go-admin/common/middleware"
 )
@@ -32,6 +33,9 @@ func InitRouter() {
 	for _, register := range registrars {
 		register(v1, authMiddleware)
 	}
+	if err := event_ingress.RegisterRuntime(engine); err != nil {
+		log.Errorf("Bell event ingress init error: %v", err)
+	}
 	if synthetic.Enabled(config.ApplicationConfig.Mode, os.Getenv) {
 		registerSyntheticRouter(v1, authMiddleware)
 	}

Bell/server/cmd/migrate/migration/version/2026083112000_event_ingress.go

@@ -0,0 +1,29 @@
+package version
+
+import (
+	"runtime"
+
+	"go-admin/app/bell/integration/event_ingress"
+	"go-admin/cmd/migrate/migration"
+	common "go-admin/common/models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+func init() {
+	_, fileName, _, _ := runtime.Caller(0)
+	migration.Migrate.SetVersion(migration.GetFilename(fileName), migrateBellEventIngress)
+}
+
+func migrateBellEventIngress(db *gorm.DB, version string) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		if err := tx.AutoMigrate(
+			&event_ingress.ReplayToken{},
+			&event_ingress.EvidenceStatus{},
+		); err != nil {
+			return err
+		}
+		return tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&common.Migration{Version: version}).Error
+	})
+}

Bell/server/cmd/migrate/migration/version/2026083112000_event_ingress_test.go

@@ -0,0 +1,65 @@
+package version
+
+import (
+	"testing"
+	"time"
+
+	"go-admin/app/bell/integration/event_ingress"
+	common "go-admin/common/models"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func TestBellEventIngressMigrationIsIdempotent(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = db.AutoMigrate(&common.Migration{}); err != nil {
+		t.Fatal(err)
+	}
+
+	const version = "2026083112000"
+	for attempt := 0; attempt < 2; attempt++ {
+		if err = migrateBellEventIngress(db, version); err != nil {
+			t.Fatalf("migration attempt %d: %v", attempt+1, err)
+		}
+	}
+
+	for name, model := range map[string]any{
+		"replay tokens":     &event_ingress.ReplayToken{},
+		"evidence statuses": &event_ingress.EvidenceStatus{},
+	} {
+		if !db.Migrator().HasTable(model) {
+			t.Fatalf("%s table missing", name)
+		}
+		var count int64
+		if err = db.Model(model).Count(&count).Error; err != nil {
+			t.Fatalf("count %s: %v", name, err)
+		}
+		if count != 0 {
+			t.Fatalf("migration inserted %d %s fixtures", count, name)
+		}
+	}
+	if !db.Migrator().HasIndex(&event_ingress.ReplayToken{}, "ExpiresAt") {
+		t.Fatal("replay expiry index missing")
+	}
+
+	now := time.Now().UTC()
+	token := event_ingress.ReplayToken{Principal: "brain", TokenID: "token-1", ExpiresAt: now.Add(time.Minute), CreatedAt: now}
+	if err = db.Create(&token).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err = db.Create(&token).Error; err == nil {
+		t.Fatal("duplicate replay token accepted")
+	}
+
+	var applied int64
+	if err = db.Model(&common.Migration{}).Where("version = ?", version).Count(&applied).Error; err != nil {
+		t.Fatal(err)
+	}
+	if applied != 1 {
+		t.Fatalf("migration records=%d, want 1", applied)
+	}
+}

Bell/server/tests/integration/event_ingress/ingress_test.go

@@ -0,0 +1,404 @@
+package event_ingress_test
+
+import (
+	"bytes"
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-admin-team/go-admin-core/sdk"
+	"gorm.io/driver/postgres"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+
+	"go-admin/app/bell/event"
+	"go-admin/app/bell/integration/event_ingress"
+	"go-admin/app/bell/integration/machine_identity"
+	"go-admin/app/bell/receipt"
+)
+
+func TestPostgresConcurrentBusinessAndSecurityIdempotency(t *testing.T) {
+	dsn := os.Getenv("BELL_EVENT_INGRESS_TEST_DATABASE_URL")
+	if dsn == "" {
+		t.Skip("set BELL_EVENT_INGRESS_TEST_DATABASE_URL to run PostgreSQL concurrency verification")
+	}
+	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = db.AutoMigrate(&event.Event{}, &receipt.Receipt{}, &receipt.IngestAudit{}, &event_ingress.ReplayToken{}, &event_ingress.EvidenceStatus{}); err != nil {
+		t.Fatal(err)
+	}
+	parsed, err := event_ingress.ParseEvent(fixture(t, "dangerous-area.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	const workers = 12
+	var created, duplicate, failures atomic.Int32
+	var wait sync.WaitGroup
+	for range workers {
+		wait.Add(1)
+		go func() {
+			defer wait.Done()
+			result, ingestErr := (event_ingress.Service{DB: db}).Ingest(context.Background(), parsed)
+			if ingestErr != nil {
+				failures.Add(1)
+				return
+			}
+			if result.Disposition == "created" {
+				created.Add(1)
+			} else if result.Disposition == "duplicate" {
+				duplicate.Add(1)
+			}
+		}()
+	}
+	wait.Wait()
+	if created.Load() != 1 || duplicate.Load() != workers-1 || failures.Load() != 0 {
+		t.Fatalf("concurrent ingest created=%d duplicate=%d failures=%d", created.Load(), duplicate.Load(), failures.Load())
+	}
+
+	now := time.Now().UTC()
+	var consumed atomic.Int32
+	for range workers {
+		wait.Add(1)
+		go func() {
+			defer wait.Done()
+			if (event_ingress.PersistentReplayStore{DB: db}).Consume("yv:sense:school-a", "concurrent-token-id-0001", now.Add(time.Minute), now) {
+				consumed.Add(1)
+			}
+		}()
+	}
+	wait.Wait()
+	if consumed.Load() != 1 {
+		t.Fatalf("concurrent replay consume accepted %d requests", consumed.Load())
+	}
+}
+
+func TestRuntimeRegistrationIsOptionalAndMigrationGated(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	t.Setenv("BELL_EVENT_INGRESS_ENABLED", "")
+	disabled := gin.New()
+	if err := event_ingress.RegisterRuntime(disabled); err != nil || len(disabled.Routes()) != 0 {
+		t.Fatalf("disabled runtime err=%v routes=%#v", err, disabled.Routes())
+	}
+
+	db, err := gorm.Open(sqlite.Open("file:bell-runtime?mode=memory&cache=shared"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	sdk.Runtime.SetDb("", db)
+	t.Cleanup(func() { sdk.Runtime.SetDb("", nil) })
+	t.Setenv("BELL_EVENT_INGRESS_ENABLED", "true")
+	if err = event_ingress.RegisterRuntime(gin.New()); err == nil {
+		t.Fatal("enabled runtime started without formal migration")
+	}
+	if err = db.AutoMigrate(&event_ingress.ReplayToken{}, &event_ingress.EvidenceStatus{}); err != nil {
+		t.Fatal(err)
+	}
+	registryPath := writeRegistry(t, "yovision-bell", "yv:sense:school-a", "sense-key-0001")
+	t.Setenv("BELL_MACHINE_PRINCIPAL_REGISTRY", registryPath)
+	registered := gin.New()
+	if err = event_ingress.RegisterRuntime(registered); err != nil {
+		t.Fatalf("enabled runtime did not register after migration: %v", err)
+	}
+	routes := registered.Routes()
+	if len(routes) != 1 || routes[0].Method != http.MethodPost || routes[0].Path != "/v1/events" {
+		t.Fatalf("unexpected ingress routes: %#v", routes)
+	}
+}
+
+func TestContractFixtureIdempotencyConflictAndReplayPersistence(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	databasePath := filepath.Join(t.TempDir(), "bell-ingress.sqlite")
+	db := openDatabasePath(t, databasePath)
+	body := fixture(t, "dangerous-area.json")
+	publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+	registry, err := machine_identity.NewRegistry(machine_identity.KeyRecord{Principal: "yv:sense:school-a", KeyID: "sense-key-0001", PublicKey: publicKey, Audience: "yovision-bell", Scopes: []string{"events:ingest"}, Enabled: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := time.Date(2026, 8, 31, 1, 0, 0, 0, time.UTC)
+	signer := machine_identity.Signer{Principal: "yv:sense:school-a", KeyID: "sense-key-0001", PrivateKey: privateKey, Now: func() time.Time { return now }}
+	newHandler := func() event_ingress.Handler {
+		return event_ingress.Handler{DB: db, Enabled: true, Verifier: machine_identity.Verifier{Registry: registry, Replay: event_ingress.PersistentReplayStore{DB: db}, Now: func() time.Time { return now }}}
+	}
+
+	firstToken := mint(t, signer, body)
+	first := request(t, newHandler(), body, firstToken)
+	if first.Code != http.StatusCreated {
+		t.Fatalf("first ingest status=%d body=%s", first.Code, first.Body.String())
+	}
+	var created event_ingress.IngestResult
+	decode(t, first, &created)
+	if created.Disposition != "created" || created.PayloadSHA256 != "4cc1e93820195caf713ea675ff33f178c9d4997dd8a81cb61287e9fea0e3d5e1" {
+		t.Fatalf("unexpected created result: %+v", created)
+	}
+	sqlDatabase, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = sqlDatabase.Close(); err != nil {
+		t.Fatal(err)
+	}
+	db = openDatabasePath(t, databasePath)
+
+	// A new process-local Handler and replay store still reject the old token,
+	// proving that security replay state is durable rather than in-memory.
+	replayedToken := request(t, newHandler(), body, firstToken)
+	if replayedToken.Code != http.StatusUnauthorized || !strings.Contains(replayedToken.Body.String(), "machine_token_replayed") {
+		t.Fatalf("token replay status=%d body=%s", replayedToken.Code, replayedToken.Body.String())
+	}
+
+	duplicate := request(t, newHandler(), body, mint(t, signer, body))
+	if duplicate.Code != http.StatusOK {
+		t.Fatalf("business duplicate status=%d body=%s", duplicate.Code, duplicate.Body.String())
+	}
+	var duplicateResult event_ingress.IngestResult
+	decode(t, duplicate, &duplicateResult)
+	if duplicateResult.Disposition != "duplicate" || duplicateResult.EventID != created.EventID {
+		t.Fatalf("duplicate did not retain event identity: %+v", duplicateResult)
+	}
+	numericVariant := bytes.Replace(body, []byte(`0.93`), []byte(`0.930`), 1)
+	numericDuplicate := request(t, newHandler(), numericVariant, mint(t, signer, numericVariant))
+	if numericDuplicate.Code != http.StatusOK || !strings.Contains(numericDuplicate.Body.String(), created.PayloadSHA256) {
+		t.Fatalf("JCS-equivalent numeric payload was not a duplicate: %d %s", numericDuplicate.Code, numericDuplicate.Body.String())
+	}
+
+	var changed map[string]any
+	if err = json.Unmarshal(body, &changed); err != nil {
+		t.Fatal(err)
+	}
+	changed["severity"] = "critical"
+	conflicting, _ := json.Marshal(changed)
+	conflict := request(t, newHandler(), conflicting, mint(t, signer, conflicting))
+	if conflict.Code != http.StatusConflict || !strings.Contains(conflict.Body.String(), "idempotency_conflict") || !strings.Contains(conflict.Body.String(), created.EventID) {
+		t.Fatalf("conflict status=%d body=%s", conflict.Code, conflict.Body.String())
+	}
+	assertCount(t, db, &event.Event{}, 1)
+	assertCount(t, db, &receipt.Receipt{}, 1)
+	assertCount(t, db, &receipt.IngestAudit{}, 4)
+}
+
+func TestEvidenceDegradationIdentityErrorsAndDisabledConnector(t *testing.T) {
+	db := openDatabase(t)
+	publicKey, privateKey, _ := ed25519.GenerateKey(rand.Reader)
+	registry, _ := machine_identity.NewRegistry(machine_identity.KeyRecord{Principal: "yv:brain:school-a", KeyID: "brain-key-0001", PublicKey: publicKey, Audience: "yovision-bell", Scopes: []string{"events:ingest"}, Enabled: true})
+	now := time.Date(2026, 8, 31, 1, 0, 0, 0, time.UTC)
+	signer := machine_identity.Signer{Principal: "yv:brain:school-a", KeyID: "brain-key-0001", PrivateKey: privateKey, Now: func() time.Time { return now }}
+	handler := event_ingress.Handler{DB: db, Enabled: true, Verifier: machine_identity.Verifier{Registry: registry, Replay: event_ingress.PersistentReplayStore{DB: db}, Now: func() time.Time { return now }}}
+
+	pending := fixture(t, "dangerous-area.json")
+	if response := requestWithID(t, handler, pending, mint(t, signer, pending), "short"); response.Code != http.StatusBadRequest || !strings.Contains(response.Body.String(), "invalid_request_id") {
+		t.Fatalf("invalid request id status=%d body=%s", response.Code, response.Body.String())
+	}
+	missingRequestID := requestWithID(t, handler, pending, mint(t, signer, pending), "")
+	if missingRequestID.Code != http.StatusCreated || !requestIDPatternForTest(missingRequestID.Header().Get("X-Request-ID")) {
+		t.Fatalf("trusted hop did not create a request id: %d %s", missingRequestID.Code, missingRequestID.Body.String())
+	}
+	queryResponse := requestTarget(t, handler, pending, mint(t, signer, pending), "/v1/events?debug=true")
+	if queryResponse.Code != http.StatusBadRequest || !strings.Contains(queryResponse.Body.String(), "invalid_request_target") {
+		t.Fatalf("query target was accepted: %d %s", queryResponse.Code, queryResponse.Body.String())
+	}
+	if response := request(t, handler, pending, mint(t, signer, pending)); response.Code != http.StatusOK {
+		t.Fatalf("pending evidence rejected: %d %s", response.Code, response.Body.String())
+	}
+	failed := fixture(t, "directional-line-crossed.json")
+	if response := request(t, handler, failed, mint(t, signer, failed)); response.Code != http.StatusCreated {
+		t.Fatalf("failed evidence rejected: %d %s", response.Code, response.Body.String())
+	}
+	assertCount(t, db, &event.Event{}, 2)
+
+	wrongAudienceToken, err := signer.Mint("yovision-sense", []string{"events:ingest"}, http.MethodPost, "/v1/events", pending)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if response := request(t, handler, pending, wrongAudienceToken); response.Code != http.StatusForbidden {
+		t.Fatalf("wrong audience was not forbidden: %d %s", response.Code, response.Body.String())
+	}
+	if response := request(t, event_ingress.Handler{Enabled: false}, pending, "none"); response.Code != http.StatusServiceUnavailable {
+		t.Fatalf("disabled connector status=%d", response.Code)
+	}
+}
+
+func TestEvidenceResolverCurrentMissingExpiredAndTimeout(t *testing.T) {
+	db := openDatabase(t)
+	now := time.Date(2026, 8, 31, 1, 0, 0, 0, time.UTC)
+	status := event_ingress.EvidenceStatus{EventID: "event-1", EvidenceID: "ev-school-east-0001", OwnerID: "sense-school-a", Status: "pending", Resolution: "snapshot", CurrentPayload: json.RawMessage(`{"schema_version":"yovision.evidence-reference/v1","evidence_id":"ev-school-east-0001","owner_id":"sense-school-a","type":"snapshot","status":"pending","captured_at":"2026-08-31T00:00:01.125Z","status_updated_at":"2026-08-31T00:00:01.125Z"}`), CreatedAt: now, UpdatedAt: now}
+	if err := db.Create(&status).Error; err != nil {
+		t.Fatal(err)
+	}
+	_, privateKey, _ := ed25519.GenerateKey(rand.Reader)
+	signer := machine_identity.Signer{Principal: "yv:bell:school-a", KeyID: "bell-key-0001", PrivateKey: privateKey, Now: func() time.Time { return now }}
+	response := func(code int, body string) *http.Response {
+		return &http.Response{StatusCode: code, Body: io.NopCloser(strings.NewReader(body)), Header: make(http.Header)}
+	}
+	client := event_ingress.EvidenceClient{Endpoint: "https://sense.example", Signer: signer, HTTP: doFunc(func(*http.Request) (*http.Response, error) {
+		return response(http.StatusNotFound, `{}`), nil
+	})}
+	if err := client.Refresh(context.Background(), db, status); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.First(&status, "event_id = ? AND evidence_id = ?", "event-1", "ev-school-east-0001").Error; err != nil || status.Resolution != "unavailable" || status.LastError != "evidence_not_found" {
+		t.Fatalf("missing resolution=%s error=%s db=%v", status.Resolution, status.LastError, err)
+	}
+	client.HTTP = doFunc(func(*http.Request) (*http.Response, error) { return response(http.StatusGone, `{}`), nil })
+	if err := client.Refresh(context.Background(), db, status); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.First(&status, "event_id = ? AND evidence_id = ?", "event-1", "ev-school-east-0001").Error; err != nil || status.Resolution != "expired" {
+		t.Fatalf("expired resolution=%s db=%v", status.Resolution, err)
+	}
+	current := `{"schema_version":"yovision.evidence-reference/v1","evidence_id":"ev-school-east-0001","owner_id":"sense-school-a","type":"snapshot","status":"success","captured_at":"2026-08-31T00:00:01.125Z","status_updated_at":"2026-08-31T00:00:02.125Z","content_type":"image/jpeg","integrity":{"algorithm":"sha256","digest":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","size_bytes":1}}`
+	client.HTTP = doFunc(func(*http.Request) (*http.Response, error) { return response(http.StatusOK, current), nil })
+	if err := client.Refresh(context.Background(), db, status); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.First(&status, "event_id = ? AND evidence_id = ?", "event-1", "ev-school-east-0001").Error; err != nil || status.Resolution != "current" || status.Status != "success" || status.LastError != "" {
+		t.Fatalf("current status=%s resolution=%s error=%s db=%v", status.Status, status.Resolution, status.LastError, err)
+	}
+	client.HTTP = doFunc(func(*http.Request) (*http.Response, error) { return nil, context.DeadlineExceeded })
+	if err := client.Refresh(context.Background(), db, status); err != nil {
+		t.Fatal(err)
+	}
+	if err := db.First(&status, "event_id = ? AND evidence_id = ?", "event-1", "ev-school-east-0001").Error; err != nil || status.Resolution != "unavailable" || status.LastError != "evidence_timeout" {
+		t.Fatalf("timeout resolution=%s error=%s db=%v", status.Resolution, status.LastError, err)
+	}
+}
+
+func openDatabase(t *testing.T) *gorm.DB {
+	return openDatabasePath(t, filepath.Join(t.TempDir(), "bell-ingress.sqlite"))
+}
+
+func openDatabasePath(t *testing.T, databasePath string) *gorm.DB {
+	t.Helper()
+	db, err := gorm.Open(sqlite.Open(databasePath), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = db.AutoMigrate(&event.Event{}, &receipt.Receipt{}, &receipt.IngestAudit{}, &event_ingress.ReplayToken{}, &event_ingress.EvidenceStatus{}); err != nil {
+		t.Fatal(err)
+	}
+	sqlDatabase, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = sqlDatabase.Close() })
+	return db
+}
+
+func fixture(t *testing.T, name string) []byte {
+	t.Helper()
+	path := filepath.Join("..", "..", "..", "..", "..", "contracts", "events", "v1", "examples", name)
+	body, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return body
+}
+
+func writeRegistry(t *testing.T, audience, principal, keyID string) string {
+	t.Helper()
+	publicKey, _, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+	document := map[string]any{
+		"version": "yovision.machine-principal-registry/v1", "audience": audience,
+		"principals": []any{map[string]any{
+			"principal_id": principal, "enabled": true,
+			"keys": []any{map[string]any{
+				"kid": keyID, "public_key_base64url": base64.RawURLEncoding.EncodeToString(publicKey),
+				"status": "active", "scopes": []string{"events:ingest"},
+			}},
+		}},
+	}
+	encoded, err := json.Marshal(document)
+	if err != nil {
+		t.Fatal(err)
+	}
+	path := filepath.Join(t.TempDir(), "registry.json")
+	if err = os.WriteFile(path, encoded, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}
+
+func mint(t *testing.T, signer machine_identity.Signer, body []byte) string {
+	t.Helper()
+	token, err := signer.Mint("yovision-bell", []string{"events:ingest"}, http.MethodPost, "/v1/events", body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return token
+}
+
+func request(t *testing.T, handler event_ingress.Handler, body []byte, token string) *httptest.ResponseRecorder {
+	return requestWithID(t, handler, body, token, "request-id-0000001")
+}
+
+func requestWithID(t *testing.T, handler event_ingress.Handler, body []byte, token, requestID string) *httptest.ResponseRecorder {
+	return requestTargetWithID(t, handler, body, token, "/v1/events", requestID)
+}
+
+func requestTarget(t *testing.T, handler event_ingress.Handler, body []byte, token, target string) *httptest.ResponseRecorder {
+	return requestTargetWithID(t, handler, body, token, target, "request-id-0000001")
+}
+
+func requestTargetWithID(t *testing.T, handler event_ingress.Handler, body []byte, token, target, requestID string) *httptest.ResponseRecorder {
+	t.Helper()
+	request := httptest.NewRequest(http.MethodPost, target, bytes.NewReader(body))
+	request.Header.Set("Authorization", "Bearer "+token)
+	request.Header.Set("X-Request-ID", requestID)
+	response := httptest.NewRecorder()
+	context, _ := gin.CreateTestContext(response)
+	context.Request = request
+	handler.Post(context)
+	return response
+}
+
+func requestIDPatternForTest(value string) bool {
+	if len(value) < 16 || len(value) > 128 {
+		return false
+	}
+	for index, r := range value {
+		if !(r >= 'A' && r <= 'Z' || r >= 'a' && r <= 'z' || r >= '0' && r <= '9' || index > 0 && strings.ContainsRune("._:-", r)) {
+			return false
+		}
+	}
+	return true
+}
+
+func decode(t *testing.T, response *httptest.ResponseRecorder, target any) {
+	t.Helper()
+	if err := json.Unmarshal(response.Body.Bytes(), target); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func assertCount(t *testing.T, db *gorm.DB, model any, expected int64) {
+	t.Helper()
+	var count int64
+	if err := db.Model(model).Count(&count).Error; err != nil || count != expected {
+		t.Fatalf("count %T=%d expected=%d err=%v", model, count, expected, err)
+	}
+}
+
+type doFunc func(*http.Request) (*http.Response, error)
+
+func (function doFunc) Do(request *http.Request) (*http.Response, error) { return function(request) }

Brain/pyproject.toml

@@ -8,7 +8,7 @@ version = "0.1.0"
 description = "Headless inference delivery unit for YoVision"
 readme = "README.md"
 requires-python = "==3.11.*"
-dependencies = []
+dependencies = ["cryptography==50.0.1"]
 
 [project.optional-dependencies]
 # The wheel backend is selected by the official PyTorch index documented in

Brain/src/yovision_brain/app/__main__.py

@@ -11,6 +11,7 @@ from yovision_brain.config import ConfigError
 from yovision_brain.decode import DecoderError
 from yovision_brain.events import JsonLinesSink
 from yovision_brain.input import InputError
+from yovision_brain.integration.event_export import build_event_export_sink
 from yovision_brain.rules import RuleConfigError
 
 from .runner import run_pipeline
@@ -38,14 +39,16 @@ def main(argv: list[str] | None = None) -> int:
     stream = sys.stdout
     owned_stream = None
     try:
-        if args.output != "-":
+        export_sink = build_event_export_sink(raw.get("event_export"), base_dir=config_path.parent)
+        if export_sink is None and args.output != "-":
             try:
                 owned_stream = Path(args.output).open("w", encoding="utf-8", newline="\n")
             except OSError:
                 print(json.dumps({"status": "error", "message": "event output cannot be opened"}), file=sys.stderr)
                 return 2
             stream = owned_stream
-        summary = run_pipeline(raw, JsonLinesSink(stream), base_dir=config_path.parent)
+        sink = export_sink if export_sink is not None else JsonLinesSink(stream)
+        summary = run_pipeline(raw, sink, base_dir=config_path.parent)
     except (ConfigError, DecoderError, InputError, RuleConfigError, RuntimeError, ValueError) as exc:
         print(json.dumps({"status": "error", "message": str(exc)}, ensure_ascii=False), file=sys.stderr)
         return 3

Brain/src/yovision_brain/integration/event_export/__init__.py

@@ -0,0 +1,30 @@
+"""Map Brain-internal candidates to the frozen anonymous event contract."""
+
+from .mapper import (
+    EVENT_SCHEMA_VERSION,
+    EVIDENCE_SCHEMA_VERSION,
+    EventExportError,
+    canonical_json,
+    canonical_json_bytes,
+    export_event,
+    payload_sha256,
+)
+from .replay import SQLiteReplayCache
+from .client import DeliveryResult, EventDeliveryError, HTTPSMachineIdentitySender
+from .runtime import EventExportSink, build_event_export_sink
+
+__all__ = [
+    "EVENT_SCHEMA_VERSION",
+    "EVIDENCE_SCHEMA_VERSION",
+    "EventExportError",
+    "EventDeliveryError",
+    "DeliveryResult",
+    "EventExportSink",
+    "HTTPSMachineIdentitySender",
+    "SQLiteReplayCache",
+    "canonical_json",
+    "canonical_json_bytes",
+    "export_event",
+    "payload_sha256",
+    "build_event_export_sink",
+]

Brain/src/yovision_brain/integration/event_export/client.py

@@ -0,0 +1,167 @@
+"""Synchronous, request-bound HTTPS delivery for Brain event exports."""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import re
+import secrets
+import urllib.error
+import urllib.request
+from dataclasses import dataclass
+from typing import Protocol
+from urllib.parse import urlsplit
+
+from yovision_brain.integration.machine_identity import Signer, TransportPolicy
+
+EVENT_PATH = "/v1/events"
+_REQUEST_ID = re.compile(r"^[A-Za-z0-9][A-Za-z0-9._:-]{15,127}$")
+
+
+class EventDeliveryError(RuntimeError):
+    """An event was not accepted; callers must retain or reproduce the fact."""
+
+    def __init__(self, code: str, *, terminal: bool) -> None:
+        super().__init__(code)
+        self.code = code
+        self.terminal = terminal
+
+
+@dataclass(frozen=True, slots=True)
+class DeliveryResult:
+    disposition: str
+    request_id: str
+
+
+class _Headers(Protocol):
+    def get(self, name: str, default: str | None = None) -> str | None: ...
+
+
+class _Response(Protocol):
+    status: int
+    headers: _Headers
+
+    def read(self, amount: int = -1) -> bytes: ...
+    def close(self) -> None: ...
+
+
+class _Opener(Protocol):
+    def open(self, request: urllib.request.Request, timeout: float) -> _Response: ...
+
+
+class HTTPSMachineIdentitySender:
+    def __init__(
+        self,
+        endpoint: str,
+        signer: Signer,
+        policy: TransportPolicy,
+        *,
+        opener: _Opener | None = None,
+    ) -> None:
+        parsed = urlsplit(endpoint)
+        if (
+            parsed.scheme != "https"
+            or not parsed.hostname
+            or parsed.username is not None
+            or parsed.password is not None
+            or parsed.path not in {"", "/"}
+            or parsed.query
+            or parsed.fragment
+        ):
+            raise ValueError("event export endpoint must be an HTTPS origin")
+        policy.validate()
+        self._endpoint = endpoint.rstrip("/")
+        self._signer = signer
+        self._policy = policy
+        self._opener = opener or urllib.request.build_opener(
+            urllib.request.HTTPSHandler(context=policy.ssl_context())
+        )
+
+    def send(self, body: bytes) -> DeliveryResult:
+        if len(body) > self._policy.max_request_bytes:
+            raise EventDeliveryError("event_request_too_large", terminal=True)
+        request_id = "req-" + secrets.token_urlsafe(16)
+        if not _REQUEST_ID.fullmatch(request_id):  # pragma: no cover - defensive invariant
+            raise RuntimeError("generated request id is invalid")
+        token = self._signer.mint(
+            "yovision-sense", ("events:ingest",), "POST", EVENT_PATH, body
+        )
+        request = urllib.request.Request(
+            self._endpoint + EVENT_PATH,
+            data=body,
+            method="POST",
+            headers={
+                "Authorization": "Bearer " + token,
+                "Content-Type": "application/json",
+                "X-Request-ID": request_id,
+            },
+        )
+        try:
+            response = self._opener.open(
+                request, timeout=self._policy.request_timeout_ms / 1000
+            )
+        except urllib.error.HTTPError as exc:
+            response_body = exc.read(64 * 1024 + 1)
+            code = _problem_code(response_body) or "event_delivery_rejected"
+            raise EventDeliveryError(
+                code,
+                terminal=400 <= exc.code < 500 and exc.code != 429,
+            ) from None
+        except (OSError, TimeoutError, urllib.error.URLError):
+            raise EventDeliveryError("event_delivery_unavailable", terminal=False) from None
+
+        try:
+            response_body = response.read(64 * 1024 + 1)
+            if len(response_body) > 64 * 1024:
+                raise EventDeliveryError("event_response_invalid", terminal=False)
+            if response.status not in {200, 201, 202}:
+                raise EventDeliveryError(
+                    "event_delivery_rejected",
+                    terminal=400 <= response.status < 500 and response.status != 429,
+                )
+            response_request_id = response.headers.get("X-Request-ID")
+            if response_request_id != request_id:
+                raise EventDeliveryError("event_response_invalid", terminal=False)
+            disposition = _disposition(response_body, response.status, body)
+            return DeliveryResult(disposition=disposition, request_id=request_id)
+        finally:
+            response.close()
+
+
+def _problem_code(body: bytes) -> str | None:
+    try:
+        value = json.loads(body)
+    except (UnicodeDecodeError, json.JSONDecodeError):
+        return None
+    code = value.get("code") if isinstance(value, dict) else None
+    return code if isinstance(code, str) and re.fullmatch(r"[a-z][a-z0-9_]{0,63}", code) else None
+
+
+def _disposition(body: bytes, status: int, request_body: bytes) -> str:
+    try:
+        value = json.loads(body)
+    except (UnicodeDecodeError, json.JSONDecodeError):
+        raise EventDeliveryError("event_response_invalid", terminal=False) from None
+    disposition = value.get("disposition") if isinstance(value, dict) else None
+    allowed = {"accepted", "created", "duplicate"}
+    if disposition not in allowed:
+        raise EventDeliveryError("event_response_invalid", terminal=False)
+    if status == 202 and disposition != "accepted":
+        raise EventDeliveryError("event_response_invalid", terminal=False)
+    try:
+        sent = json.loads(request_body)
+        response_identity = (
+            value["producer_id"],
+            value["source_event_id"],
+            value["payload_sha256"],
+        )
+        expected_identity = (
+            sent["producer_id"],
+            sent["source_event_id"],
+            hashlib.sha256(request_body).hexdigest(),
+        )
+    except (KeyError, TypeError, UnicodeDecodeError, json.JSONDecodeError):
+        raise EventDeliveryError("event_response_invalid", terminal=False) from None
+    if response_identity != expected_identity:
+        raise EventDeliveryError("event_response_invalid", terminal=False)
+    return disposition

Brain/src/yovision_brain/integration/event_export/mapper.py

@@ -0,0 +1,378 @@
+"""Safe, deterministic Brain producer mapping for ``yovision.event/v1``."""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import math
+import re
+from datetime import datetime, timedelta, timezone
+from decimal import Decimal
+from typing import Mapping, Sequence
+
+from yovision_brain.events import INTERNAL_EVENT_SCHEMA, InternalEventCandidate
+
+EVENT_SCHEMA_VERSION = "yovision.event/v1"
+EVIDENCE_SCHEMA_VERSION = "yovision.evidence-reference/v1"
+
+_REFERENCE = re.compile(r"^[A-Za-z0-9][A-Za-z0-9._:-]{0,127}$")
+_SHA256 = re.compile(r"^[a-f0-9]{64}$")
+_URL = re.compile(r"^[A-Za-z][A-Za-z0-9+.-]*://")
+_WINDOWS_PATH = re.compile(r"^[A-Za-z]:[\\/]")
+_SENSITIVE_NAMES = frozenset(
+    {
+        "path",
+        "url",
+        "uri",
+        "password",
+        "secret",
+        "token",
+        "credential",
+        "signed_url",
+        "camera_url",
+        "face",
+        "face_id",
+        "face_template",
+        "alert",
+        "ack",
+        "close",
+        "notification",
+    }
+)
+_EVIDENCE_FIELDS = frozenset(
+    {
+        "schema_version",
+        "evidence_id",
+        "owner_id",
+        "type",
+        "status",
+        "captured_at",
+        "status_updated_at",
+        "expires_at",
+        "content_type",
+        "integrity",
+        "failure",
+    }
+)
+
+
+class EventExportError(ValueError):
+    """The internal candidate cannot safely satisfy the frozen contract."""
+
+
+def export_event(
+    candidate: InternalEventCandidate,
+    *,
+    producer_id: str,
+    site_ref: str,
+    device_ref: str | None = None,
+    severity: str,
+    evidence: Sequence[Mapping[str, object]] = (),
+    region_ref: str | None = None,
+    crossing_direction: str | None = None,
+    category: str | None = None,
+) -> dict[str, object]:
+    """Return a new closed v1 payload without mutating the internal candidate.
+
+    The candidate's already stable ``event_id`` is the source identity. Callers
+    must persist and retry the returned payload unchanged; transport attempts do
+    not participate in either identity field.
+    """
+
+    if candidate.schema != INTERNAL_EVENT_SCHEMA:
+        raise EventExportError("unsupported internal event candidate schema")
+    producer_id = _reference("producer_id", producer_id)
+    source_event_id = _reference("source_event_id", candidate.event_id)
+    site_ref = _reference("site_ref", site_ref)
+    device_ref = _reference("device_ref", device_ref or candidate.logical_input_id)
+    profile_ref = _reference("profile_ref", candidate.profile_id)
+    rule_id = _reference("rule.rule_id", candidate.rule_id)
+    region_id = _reference("region.region_id", region_ref or candidate.rule_id)
+    track_id = _reference("observation.track_id", candidate.track_id)
+
+    event_type = {
+        "danger_area_entered": "dangerous_area_entered",
+        "dangerous_area_entered": "dangerous_area_entered",
+        "directional_line_crossed": "directional_line_crossed",
+    }.get(candidate.event_type)
+    if event_type is None:
+        raise EventExportError("unsupported event type")
+    if severity not in {"low", "medium", "high", "critical"}:
+        raise EventExportError("unsupported severity")
+
+    observation = _observation(candidate, track_id=track_id, category=category)
+    region: dict[str, object] = {
+        "region_id": region_id,
+        "kind": "area" if event_type == "dangerous_area_entered" else "line",
+    }
+    if event_type == "directional_line_crossed":
+        if crossing_direction not in {"a_to_b", "b_to_a"}:
+            raise EventExportError("line events require a contract crossing_direction")
+        region["crossing_direction"] = crossing_direction
+    elif crossing_direction is not None:
+        raise EventExportError("area events cannot carry crossing_direction")
+
+    if len(evidence) > 8:
+        raise EventExportError("at most eight evidence references are allowed")
+    mapped_evidence = [_evidence_reference(item) for item in evidence]
+    if len({canonical_json_bytes(item) for item in mapped_evidence}) != len(mapped_evidence):
+        raise EventExportError("duplicate evidence references are not allowed")
+
+    payload: dict[str, object] = {
+        "schema_version": EVENT_SCHEMA_VERSION,
+        "producer_id": producer_id,
+        "source_event_id": source_event_id,
+        "site_ref": site_ref,
+        "device_ref": device_ref,
+        "profile_ref": profile_ref,
+        "event_type": event_type,
+        "occurred_at": _event_timestamp(candidate.occurred_at_ns),
+        "severity": severity,
+        "rule": {"rule_id": rule_id, "version": _bounded_text("rule.version", candidate.rule_version, 64)},
+        "model": {
+            "name": _bounded_text("model.name", candidate.model_name, 128),
+            "version": _bounded_text("model.version", candidate.model_version, 64),
+        },
+        "observation": observation,
+        "region": region,
+        "evidence": mapped_evidence,
+    }
+    _reject_unsafe(payload)
+    canonical_json_bytes(payload)  # Reject non-finite or unsupported values now.
+    return payload
+
+
+def canonical_json(value: object) -> str:
+    """Serialize the closed event-domain JCS subset used by frozen fixtures.
+
+    Contract values use JSON strings, containers, booleans, integers and finite
+    ordinary decimals. Integer-valued floats are normalized to their JSON number
+    form; the checked-in RFC 8785 vector fixes cross-language digest behavior.
+    """
+
+    return _encode_jcs(_normalize_numbers(value))
+
+
+def canonical_json_bytes(value: object) -> bytes:
+    return canonical_json(value).encode("utf-8")
+
+
+def payload_sha256(event: Mapping[str, object]) -> str:
+    return hashlib.sha256(canonical_json_bytes(event)).hexdigest()
+
+
+def _observation(
+    candidate: InternalEventCandidate, *, track_id: str, category: str | None
+) -> dict[str, object]:
+    internal = candidate.observation
+    confidence = internal.get("confidence")
+    if isinstance(confidence, bool) or not isinstance(confidence, (int, float)):
+        raise EventExportError("observation confidence must be numeric")
+    confidence = float(confidence)
+    if not math.isfinite(confidence) or not 0 <= confidence <= 1:
+        raise EventExportError("observation confidence must be finite and between zero and one")
+
+    internal_category = internal.get("category")
+    exported_category = category or {
+        "anonymous_target": "person",
+        "person": "person",
+        "vehicle": "vehicle",
+        "other": "other",
+    }.get(internal_category)
+    if exported_category not in {"person", "vehicle", "other"}:
+        raise EventExportError("observation category requires an explicit anonymous contract mapping")
+
+    result: dict[str, object] = {
+        "track_id": track_id,
+        "category": exported_category,
+        "confidence": confidence,
+    }
+    box = internal.get("box")
+    if box is not None:
+        if not isinstance(box, Mapping) or set(box) != {"left", "top", "right", "bottom"}:
+            raise EventExportError("internal observation box is malformed")
+        if candidate.frame_width <= 0 or candidate.frame_height <= 0:
+            raise EventExportError("frame dimensions must be positive")
+        coordinates = (box["left"], box["top"], box["right"], box["bottom"])
+        if any(isinstance(value, bool) or not isinstance(value, (int, float)) for value in coordinates):
+            raise EventExportError("box coordinates must be numeric")
+        normalized = [
+            float(coordinates[0]) / candidate.frame_width,
+            float(coordinates[1]) / candidate.frame_height,
+            float(coordinates[2]) / candidate.frame_width,
+            float(coordinates[3]) / candidate.frame_height,
+        ]
+        if any(not math.isfinite(value) or not 0 <= value <= 1 for value in normalized):
+            raise EventExportError("normalized box coordinates must be finite and between zero and one")
+        result["bbox_normalized"] = normalized
+    return result
+
+
+def _evidence_reference(source: Mapping[str, object]) -> dict[str, object]:
+    if not isinstance(source, Mapping):
+        raise EventExportError("evidence reference must be an object")
+    unknown = set(source) - _EVIDENCE_FIELDS
+    if unknown:
+        raise EventExportError(f"evidence reference contains forbidden fields: {sorted(unknown)!r}")
+    required = {
+        "schema_version",
+        "evidence_id",
+        "owner_id",
+        "type",
+        "status",
+        "captured_at",
+        "status_updated_at",
+    }
+    missing = required - set(source)
+    if missing:
+        raise EventExportError(f"evidence reference is missing fields: {sorted(missing)!r}")
+    result = dict(source)
+    if result["schema_version"] != EVIDENCE_SCHEMA_VERSION:
+        raise EventExportError("unsupported evidence schema version")
+    _reference("evidence.evidence_id", result["evidence_id"])
+    _reference("evidence.owner_id", result["owner_id"])
+    if result["type"] not in {"snapshot", "clip"}:
+        raise EventExportError("unsupported evidence type")
+    status = result["status"]
+    if status not in {"pending", "processing", "success", "failed"}:
+        raise EventExportError("unsupported evidence status")
+    for field in ("captured_at", "status_updated_at", "expires_at"):
+        if field in result:
+            _date_time(field, result[field])
+
+    if status in {"pending", "processing"}:
+        if any(field in result for field in ("content_type", "integrity", "failure")):
+            raise EventExportError(f"{status} evidence cannot claim content or failure")
+    elif status == "success":
+        if "failure" in result or "content_type" not in result or "integrity" not in result:
+            raise EventExportError("successful evidence requires content metadata and no failure")
+        if result["content_type"] not in {"image/jpeg", "image/png", "video/mp4"}:
+            raise EventExportError("unsupported evidence content type")
+        integrity = result["integrity"]
+        if not isinstance(integrity, Mapping) or set(integrity) != {"algorithm", "digest", "size_bytes"}:
+            raise EventExportError("evidence integrity is malformed")
+        if integrity["algorithm"] != "sha256" or not isinstance(integrity["digest"], str) or not _SHA256.fullmatch(integrity["digest"]):
+            raise EventExportError("evidence integrity must contain a SHA-256 digest")
+        if isinstance(integrity["size_bytes"], bool) or not isinstance(integrity["size_bytes"], int) or integrity["size_bytes"] < 0:
+            raise EventExportError("evidence size must be a non-negative integer")
+    else:
+        if "content_type" in result or "integrity" in result or "failure" not in result:
+            raise EventExportError("failed evidence requires only failure metadata")
+        failure = result["failure"]
+        if not isinstance(failure, Mapping) or set(failure) != {"code", "retryable"}:
+            raise EventExportError("evidence failure is malformed")
+        if failure["code"] not in {"capture_failed", "processing_failed", "expired", "unavailable"}:
+            raise EventExportError("unsupported evidence failure code")
+        if not isinstance(failure["retryable"], bool):
+            raise EventExportError("evidence retryable must be boolean")
+    _reject_unsafe(result)
+    return result
+
+
+def _reference(name: str, value: object) -> str:
+    if not isinstance(value, str) or not _REFERENCE.fullmatch(value):
+        raise EventExportError(f"{name} is not a valid logical reference")
+    return value
+
+
+def _bounded_text(name: str, value: object, maximum: int) -> str:
+    if not isinstance(value, str) or not 1 <= len(value) <= maximum:
+        raise EventExportError(f"{name} must be 1..{maximum} characters")
+    return value
+
+
+def _event_timestamp(nanoseconds: int) -> str:
+    if isinstance(nanoseconds, bool) or not isinstance(nanoseconds, int) or nanoseconds < 0:
+        raise EventExportError("occurred_at_ns must be a non-negative integer")
+    seconds, remainder = divmod(nanoseconds, 1_000_000_000)
+    value = datetime(1970, 1, 1, tzinfo=timezone.utc) + timedelta(
+        seconds=seconds, milliseconds=remainder // 1_000_000
+    )
+    return value.strftime("%Y-%m-%dT%H:%M:%S.") + f"{value.microsecond // 1000:03d}Z"
+
+
+def _date_time(name: str, value: object) -> None:
+    if not isinstance(value, str):
+        raise EventExportError(f"evidence {name} must be a date-time string")
+    try:
+        parsed = datetime.fromisoformat(value.replace("Z", "+00:00"))
+    except ValueError as exc:
+        raise EventExportError(f"evidence {name} must be a valid date-time") from exc
+    if parsed.tzinfo is None:
+        raise EventExportError(f"evidence {name} must include a timezone")
+
+
+def _reject_unsafe(value: object, *, key: str = "") -> None:
+    if isinstance(value, Mapping):
+        for child_key, child in value.items():
+            lowered = str(child_key).lower()
+            if lowered in _SENSITIVE_NAMES or lowered.endswith("_path") or lowered.endswith("_url"):
+                raise EventExportError(f"sensitive field {child_key!r} is forbidden")
+            _reject_unsafe(child, key=lowered)
+    elif isinstance(value, (list, tuple)):
+        for child in value:
+            _reject_unsafe(child, key=key)
+    elif isinstance(value, str):
+        if _URL.match(value) or _WINDOWS_PATH.match(value) or value.startswith(("/", "\\\\")):
+            raise EventExportError(f"path or URL value in {key or 'payload'} is forbidden")
+
+
+def _normalize_numbers(value: object) -> object:
+    if value is None or isinstance(value, (str, bool, int)):
+        return value
+    if isinstance(value, float):
+        if not math.isfinite(value):
+            raise EventExportError("canonical JSON rejects non-finite numbers")
+        if value == 0:
+            return 0
+        return value
+    if isinstance(value, Mapping):
+        if any(not isinstance(key, str) for key in value):
+            raise EventExportError("canonical JSON object keys must be strings")
+        return {key: _normalize_numbers(child) for key, child in value.items()}
+    if isinstance(value, (list, tuple)):
+        return [_normalize_numbers(child) for child in value]
+    raise EventExportError(f"canonical JSON does not support {type(value).__name__}")
+
+
+def _encode_jcs(value: object) -> str:
+    if value is None:
+        return "null"
+    if value is True:
+        return "true"
+    if value is False:
+        return "false"
+    if isinstance(value, str):
+        return json.dumps(value, ensure_ascii=False, separators=(",", ":"))
+    if isinstance(value, int):
+        return str(value)
+    if isinstance(value, float):
+        return _jcs_float(value)
+    if isinstance(value, list):
+        return "[" + ",".join(_encode_jcs(item) for item in value) + "]"
+    if isinstance(value, Mapping):
+        # Frozen contract keys are ASCII. Sorting them is therefore identical
+        # to RFC 8785's UTF-16 code-unit ordering without accepting extensions.
+        return "{" + ",".join(
+            _encode_jcs(key) + ":" + _encode_jcs(value[key]) for key in sorted(value)
+        ) + "}"
+    raise EventExportError(f"canonical JSON does not support {type(value).__name__}")
+
+
+def _jcs_float(value: float) -> str:
+    if not math.isfinite(value):
+        raise EventExportError("canonical JSON rejects non-finite numbers")
+    if value == 0:
+        return "0"
+    rendered = repr(value).lower()
+    absolute = abs(value)
+    if 1e-6 <= absolute < 1e21 and "e" in rendered:
+        return format(Decimal(rendered), "f")
+    if "e" in rendered:
+        mantissa, exponent = rendered.split("e", 1)
+        sign = ""
+        if exponent.startswith(("+", "-")):
+            sign, exponent = exponent[0], exponent[1:]
+        exponent = exponent.lstrip("0") or "0"
+        rendered = mantissa + "e" + sign + exponent
+    return rendered[:-2] if rendered.endswith(".0") else rendered

Brain/src/yovision_brain/integration/event_export/replay.py

@@ -0,0 +1,69 @@
+"""Durable atomic replay protection owned by the Brain connector."""
+
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+
+
+class SQLiteReplayCache:
+    """SQLite implementation of the machine-identity ``ReplayCache`` protocol.
+
+    A primary key makes consumption atomic across threads and processes. Entries
+    remain durable across connector restarts until their verifier expiry passes.
+    """
+
+    def __init__(self, database: str | Path, *, timeout_seconds: float = 5.0) -> None:
+        self._database = str(Path(database))
+        self._timeout_seconds = timeout_seconds
+        if timeout_seconds <= 0:
+            raise ValueError("SQLite replay timeout must be positive")
+        with self._connect() as connection:
+            connection.execute("PRAGMA journal_mode=WAL")
+            connection.execute(
+                """
+                CREATE TABLE IF NOT EXISTS machine_token_replay (
+                    principal TEXT NOT NULL,
+                    token_id TEXT NOT NULL,
+                    expires_at INTEGER NOT NULL,
+                    PRIMARY KEY (principal, token_id)
+                ) WITHOUT ROWID
+                """
+            )
+
+    def consume(self, principal: str, token_id: str, expires_at: int, now: int) -> bool:
+        if not principal or not token_id:
+            raise ValueError("replay identity must be non-empty")
+        if any(isinstance(value, bool) or not isinstance(value, int) for value in (expires_at, now)):
+            raise ValueError("replay timestamps must be integers")
+        if expires_at <= now:
+            return False
+
+        connection = self._connect()
+        try:
+            connection.execute("BEGIN IMMEDIATE")
+            connection.execute("DELETE FROM machine_token_replay WHERE expires_at <= ?", (now,))
+            try:
+                connection.execute(
+                    "INSERT INTO machine_token_replay (principal, token_id, expires_at) VALUES (?, ?, ?)",
+                    (principal, token_id, expires_at),
+                )
+            except sqlite3.IntegrityError:
+                connection.rollback()
+                return False
+            connection.commit()
+            return True
+        except BaseException:
+            connection.rollback()
+            raise
+        finally:
+            connection.close()
+
+    def _connect(self) -> sqlite3.Connection:
+        connection = sqlite3.connect(
+            self._database,
+            timeout=self._timeout_seconds,
+            isolation_level=None,
+        )
+        connection.execute(f"PRAGMA busy_timeout={int(self._timeout_seconds * 1000)}")
+        return connection

Brain/src/yovision_brain/integration/event_export/runtime.py

@@ -0,0 +1,134 @@
+"""Closed runtime configuration and event sink for Brain-to-Sense export."""
+
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Mapping
+
+from yovision_brain.events import InternalEventCandidate
+from yovision_brain.integration.machine_identity import (
+    Signer,
+    TransportPolicy,
+    load_private_key,
+)
+
+from .client import HTTPSMachineIdentitySender
+from .mapper import canonical_json_bytes, export_event
+
+
+class EventExportSink:
+    def __init__(
+        self,
+        sender: HTTPSMachineIdentitySender,
+        *,
+        producer_id: str,
+        site_ref: str,
+        severity: str,
+        region_refs: Mapping[str, str],
+        crossing_directions: Mapping[str, str],
+    ) -> None:
+        self._sender = sender
+        self._producer_id = producer_id
+        self._site_ref = site_ref
+        self._severity = severity
+        self._region_refs = dict(region_refs)
+        self._crossing_directions = dict(crossing_directions)
+
+    def write(self, candidate: InternalEventCandidate) -> None:
+        event = export_event(
+            candidate,
+            producer_id=self._producer_id,
+            site_ref=self._site_ref,
+            severity=self._severity,
+            region_ref=self._region_refs.get(candidate.rule_id),
+            crossing_direction=self._crossing_directions.get(candidate.rule_id),
+        )
+        # Mapping and serialization happen before minting, so the exact bytes are
+        # bound to the machine token and remain unchanged for this delivery.
+        self._sender.send(canonical_json_bytes(event))
+
+
+def build_event_export_sink(raw: object, *, base_dir: Path) -> EventExportSink | None:
+    if raw is None:
+        return None
+    config = _object("event_export", raw)
+    _closed(
+        "event_export",
+        config,
+        {
+            "enabled", "endpoint", "producer_id", "site_ref", "severity",
+            "region_refs", "crossing_directions", "machine_identity", "transport",
+        },
+    )
+    enabled = config.get("enabled", False)
+    if not isinstance(enabled, bool):
+        raise ValueError("event_export.enabled must be a boolean")
+    if not enabled:
+        if set(config) != {"enabled"}:
+            raise ValueError("disabled event_export may only contain enabled")
+        return None
+
+    identity = _object("event_export.machine_identity", config.get("machine_identity"))
+    _closed(
+        "event_export.machine_identity",
+        identity,
+        {"principal", "key_id", "private_key_path"},
+    )
+    transport_raw = _object("event_export.transport", config.get("transport"))
+    _closed(
+        "event_export.transport",
+        transport_raw,
+        {
+            "tls_min_version", "verify_certificate", "verify_hostname",
+            "connect_timeout_ms", "response_header_timeout_ms", "request_timeout_ms",
+            "max_request_bytes",
+        },
+    )
+    policy = TransportPolicy(**transport_raw)  # type: ignore[arg-type]
+    policy.validate()
+    key_path = _string("private_key_path", identity.get("private_key_path"))
+    resolved_key_path = Path(key_path)
+    if not resolved_key_path.is_absolute():
+        resolved_key_path = base_dir / resolved_key_path
+    signer = Signer(
+        _string("principal", identity.get("principal")),
+        _string("key_id", identity.get("key_id")),
+        load_private_key(resolved_key_path),
+    )
+    return EventExportSink(
+        HTTPSMachineIdentitySender(
+            _string("endpoint", config.get("endpoint")), signer, policy
+        ),
+        producer_id=_string("producer_id", config.get("producer_id")),
+        site_ref=_string("site_ref", config.get("site_ref")),
+        severity=_string("severity", config.get("severity")),
+        region_refs=_string_map("region_refs", config.get("region_refs", {})),
+        crossing_directions=_string_map(
+            "crossing_directions", config.get("crossing_directions", {})
+        ),
+    )
+
+
+def _object(name: str, value: object) -> Mapping[str, object]:
+    if not isinstance(value, Mapping) or any(not isinstance(key, str) for key in value):
+        raise ValueError(f"{name} must be an object")
+    return value
+
+
+def _closed(name: str, value: Mapping[str, object], allowed: set[str]) -> None:
+    unknown = set(value) - allowed
+    if unknown:
+        raise ValueError(f"{name} contains unsupported fields")
+
+
+def _string(name: str, value: object) -> str:
+    if not isinstance(value, str) or not value.strip():
+        raise ValueError(f"event_export.{name} must be a non-empty string")
+    return value
+
+
+def _string_map(name: str, value: object) -> Mapping[str, str]:
+    mapping = _object(f"event_export.{name}", value)
+    if any(not isinstance(item, str) or not item for item in mapping.values()):
+        raise ValueError(f"event_export.{name} values must be non-empty strings")
+    return mapping  # type: ignore[return-value]

Brain/src/yovision_brain/integration/machine_identity/__init__.py

@@ -0,0 +1,37 @@
+"""Independent service-to-service machine identity for Brain connectors."""
+
+from .token import (
+    ALLOWED_SKEW_SECONDS,
+    MAX_KEY_OVERLAP_SECONDS,
+    MAX_LIFETIME_SECONDS,
+    VERSION,
+    Claims,
+    KeyRecord,
+    MachineIdentityError,
+    Registry,
+    ReplayStore,
+    Signer,
+    Verifier,
+    load_private_key,
+    load_registry,
+    bearer_token,
+)
+from .transport import TransportPolicy
+
+__all__ = [
+    "ALLOWED_SKEW_SECONDS",
+    "MAX_KEY_OVERLAP_SECONDS",
+    "MAX_LIFETIME_SECONDS",
+    "VERSION",
+    "Claims",
+    "KeyRecord",
+    "MachineIdentityError",
+    "Registry",
+    "ReplayStore",
+    "Signer",
+    "TransportPolicy",
+    "Verifier",
+    "load_private_key",
+    "load_registry",
+    "bearer_token",
+]

Brain/src/yovision_brain/integration/machine_identity/token.py

@@ -0,0 +1,336 @@
+"""Ed25519 request-bound machine tokens.
+
+This module never accepts browser cookies, GoAdmin JWTs, query tokens, or
+shared secrets. HTTP adapters must obtain the compact token exclusively from
+the Authorization bearer header and pass the request body unchanged.
+"""
+
+from __future__ import annotations
+
+import base64
+import hashlib
+import json
+import posixpath
+import re
+import secrets
+import threading
+import time
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Callable, Iterable, Protocol
+from urllib.parse import urlsplit
+
+from cryptography.exceptions import InvalidSignature
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric.ed25519 import (
+    Ed25519PrivateKey,
+    Ed25519PublicKey,
+)
+
+VERSION = "yovision.machine-identity/v1"
+TOKEN_TYPE = "YOVISION-MACHINE+JWT"
+MAX_LIFETIME_SECONDS = 300
+ALLOWED_SKEW_SECONDS = 30
+MAX_KEY_OVERLAP_SECONDS = 24 * 60 * 60
+_METHODS = frozenset({"GET", "POST", "PUT", "PATCH", "DELETE"})
+_AUDIENCES = frozenset({"yovision-sense", "yovision-brain", "yovision-bell"})
+_SCOPES = frozenset({"source-config:write", "runtime-status:write", "events:ingest", "evidence:read"})
+_PRINCIPAL = re.compile(r"^yv:(sense|brain|bell):[a-z0-9][a-z0-9.-]{0,62}$")
+_KEY_ID = re.compile(r"^[A-Za-z0-9._-]{8,64}$")
+_TOKEN_ID = re.compile(r"^[A-Za-z0-9_-]{22,64}$")
+
+
+class MachineIdentityError(ValueError):
+    """A stable, non-secret authentication failure."""
+
+    def __init__(self, code: str) -> None:
+        super().__init__(code)
+        self.code = code
+
+
+def bearer_token(authorization: str) -> str:
+    """Extract only an Authorization bearer token; there is no cookie/query fallback."""
+    parts = authorization.split(" ")
+    if len(parts) != 2 or parts[0].lower() != "bearer" or not parts[1] or any(character in parts[1] for character in " \t\r\n,"):
+        raise MachineIdentityError("machine_token_missing")
+    return parts[1]
+
+
+@dataclass(frozen=True)
+class Claims:
+    ver: str
+    iss: str
+    sub: str
+    aud: str
+    scope: tuple[str, ...]
+    iat: int
+    nbf: int
+    exp: int
+    jti: str
+    htm: str
+    htu: str
+    body_sha256: str
+
+
+@dataclass(frozen=True)
+class KeyRecord:
+    principal: str
+    key_id: str
+    public_key: Ed25519PublicKey
+    audience: str
+    scopes: frozenset[str]
+    enabled: bool = True
+    revoked: bool = False
+
+
+class Registry:
+    def __init__(self, records: Iterable[KeyRecord]) -> None:
+        self._lock = threading.RLock()
+        self._records: dict[str, KeyRecord] = {}
+        for record in records:
+            if not _KEY_ID.fullmatch(record.key_id) or not _PRINCIPAL.fullmatch(record.principal) or record.audience not in _AUDIENCES or not _valid_scopes(record.scopes):
+                raise ValueError("invalid machine key record")
+            if record.key_id in self._records:
+                raise ValueError("duplicate machine key id")
+            self._records[record.key_id] = record
+
+    def lookup(self, key_id: str) -> KeyRecord | None:
+        with self._lock:
+            return self._records.get(key_id)
+
+    def revoke(self, key_id: str) -> bool:
+        with self._lock:
+            record = self._records.get(key_id)
+            if record is None:
+                return False
+            self._records[key_id] = KeyRecord(
+                principal=record.principal,
+                key_id=record.key_id,
+                public_key=record.public_key,
+                audience=record.audience,
+                scopes=record.scopes,
+                enabled=record.enabled,
+                revoked=True,
+            )
+            return True
+
+
+class ReplayStore:
+    """Process-local replay cache for tests or one uninterrupted process."""
+    def __init__(self) -> None:
+        self._lock = threading.Lock()
+        self._used: dict[tuple[str, str], int] = {}
+
+    def consume(self, principal: str, token_id: str, expires_at: int, now: int) -> bool:
+        with self._lock:
+            self._used = {key: expiry for key, expiry in self._used.items() if expiry > now}
+            key = (principal, token_id)
+            if key in self._used:
+                return False
+            self._used[key] = expires_at
+            return True
+
+
+class ReplayCache(Protocol):
+    """Connector implementations provide an atomic durable implementation."""
+
+    def consume(self, principal: str, token_id: str, expires_at: int, now: int) -> bool: ...
+
+
+def load_private_key(path: str | Path) -> Ed25519PrivateKey:
+    if not str(path).strip():
+        raise ValueError("machine private key path is required")
+    try:
+        raw = Path(path).read_bytes()
+        key = serialization.load_pem_private_key(raw, password=None)
+    except (OSError, ValueError, TypeError) as exc:
+        raise ValueError("invalid machine private key file") from exc
+    if not isinstance(key, Ed25519PrivateKey):
+        raise ValueError("machine private key is not Ed25519")
+    return key
+
+
+def load_registry(path: str | Path, expected_audience: str) -> Registry:
+    if not str(path).strip() or expected_audience not in _AUDIENCES:
+        raise ValueError("machine principal registry path and audience are required")
+    try:
+        document = json.loads(Path(path).read_text(encoding="utf-8"))
+    except (OSError, UnicodeDecodeError, json.JSONDecodeError) as exc:
+        raise ValueError("invalid machine principal registry") from exc
+    if not isinstance(document, dict) or set(document) != {"version", "audience", "principals"} or document["version"] != "yovision.machine-principal-registry/v1" or document["audience"] != expected_audience or not isinstance(document["principals"], list) or not document["principals"]:
+        raise ValueError("invalid machine principal registry")
+    records: list[KeyRecord] = []
+    try:
+        for principal in document["principals"]:
+            if not isinstance(principal, dict) or set(principal) != {"principal_id", "enabled", "keys"} or not isinstance(principal["enabled"], bool) or not isinstance(principal["keys"], list) or not principal["keys"]:
+                raise ValueError
+            for key in principal["keys"]:
+                if not isinstance(key, dict) or set(key) != {"kid", "public_key_base64url", "status", "scopes"} or key["status"] not in {"active", "revoked"} or not isinstance(key["scopes"], list):
+                    raise ValueError
+                public_key = Ed25519PublicKey.from_public_bytes(_b64decode(key["public_key_base64url"]))
+                records.append(KeyRecord(principal["principal_id"], key["kid"], public_key, expected_audience, frozenset(key["scopes"]), principal["enabled"], key["status"] == "revoked"))
+    except (KeyError, TypeError, ValueError):
+        raise ValueError("invalid machine principal registry") from None
+    return Registry(records)
+
+
+class Signer:
+    def __init__(
+        self,
+        principal: str,
+        key_id: str,
+        private_key: Ed25519PrivateKey,
+        *,
+        clock: Callable[[], int] | None = None,
+    ) -> None:
+        if not _PRINCIPAL.fullmatch(principal) or not _KEY_ID.fullmatch(key_id) or not isinstance(private_key, Ed25519PrivateKey):
+            raise ValueError("incomplete machine signer configuration")
+        self._principal = principal
+        self._key_id = key_id
+        self._private_key = private_key
+        self._clock = clock or (lambda: int(time.time()))
+
+    def mint(self, audience: str, scopes: Iterable[str], method: str, request_path: str, body: bytes) -> str:
+        normalized_path = _normalize_path(request_path)
+        normalized_method = method.upper()
+        scope_values = tuple(scopes)
+        if audience not in _AUDIENCES or not _valid_scopes(scope_values) or normalized_method not in _METHODS:
+            raise ValueError("invalid machine token request")
+        now = int(self._clock())
+        header = {"alg": "EdDSA", "typ": TOKEN_TYPE, "kid": self._key_id, "ver": VERSION}
+        claims = {
+            "ver": VERSION,
+            "iss": self._principal,
+            "sub": self._principal,
+            "aud": audience,
+            "scope": list(scope_values),
+            "iat": now,
+            "nbf": now,
+            "exp": now + MAX_LIFETIME_SECONDS,
+            "jti": secrets.token_urlsafe(16),
+            "htm": normalized_method,
+            "htu": normalized_path,
+            "body_sha256": hashlib.sha256(body).hexdigest(),
+        }
+        encoded_header = _encode_json(header)
+        encoded_claims = _encode_json(claims)
+        signing_input = f"{encoded_header}.{encoded_claims}".encode("ascii")
+        signature = self._private_key.sign(signing_input)
+        return f"{encoded_header}.{encoded_claims}.{_b64encode(signature)}"
+
+
+class Verifier:
+    def __init__(
+        self,
+        registry: Registry,
+        replay_store: ReplayCache,
+        *,
+        clock: Callable[[], int] | None = None,
+    ) -> None:
+        self._registry = registry
+        self._replay_store = replay_store
+        self._clock = clock or (lambda: int(time.time()))
+
+    def verify(
+        self,
+        token: str,
+        audience: str,
+        required_scope: str,
+        method: str,
+        request_path: str,
+        body: bytes,
+    ) -> Claims:
+        parts = token.split(".")
+        if len(parts) != 3 or "=" in token:
+            raise MachineIdentityError("machine_token_invalid")
+        header = _decode_object(parts[0], {"alg", "typ", "kid", "ver"})
+        if header.get("alg") != "EdDSA" or header.get("typ") != TOKEN_TYPE or header.get("ver") != VERSION or not isinstance(header.get("kid"), str) or not _KEY_ID.fullmatch(header["kid"]):
+            raise MachineIdentityError("machine_token_invalid")
+        record = self._registry.lookup(header["kid"])
+        if record is None:
+            raise MachineIdentityError("machine_token_invalid")
+        try:
+            record.public_key.verify(_b64decode(parts[2]), f"{parts[0]}.{parts[1]}".encode("ascii"))
+        except (InvalidSignature, ValueError):
+            raise MachineIdentityError("machine_token_invalid") from None
+        if not record.enabled or record.revoked:
+            raise MachineIdentityError("machine_identity_revoked")
+
+        raw = _decode_object(parts[1], {"ver", "iss", "sub", "aud", "scope", "iat", "nbf", "exp", "jti", "htm", "htu", "body_sha256"})
+        claims = _claims_from_object(raw)
+        if claims.iss != record.principal or claims.sub != record.principal:
+            raise MachineIdentityError("machine_token_invalid")
+        now = int(self._clock())
+        if claims.exp - claims.iat <= 0 or claims.exp - claims.iat > MAX_LIFETIME_SECONDS or claims.nbf < claims.iat or claims.nbf > claims.exp or claims.iat > now + ALLOWED_SKEW_SECONDS:
+            raise MachineIdentityError("machine_token_invalid")
+        if claims.nbf > now + ALLOWED_SKEW_SECONDS or claims.exp < now - ALLOWED_SKEW_SECONDS:
+            raise MachineIdentityError("machine_token_expired")
+        if claims.aud != audience or record.audience != audience:
+            raise MachineIdentityError("machine_audience_denied")
+        if required_scope not in claims.scope or required_scope not in record.scopes:
+            raise MachineIdentityError("machine_scope_denied")
+        if claims.htm != method.upper() or claims.htu != _normalize_path(request_path) or claims.body_sha256 != hashlib.sha256(body).hexdigest():
+            raise MachineIdentityError("machine_token_invalid")
+        if not self._replay_store.consume(claims.iss, claims.jti, claims.exp + ALLOWED_SKEW_SECONDS, now):
+            raise MachineIdentityError("machine_token_replayed")
+        return claims
+
+
+def _claims_from_object(value: dict[str, object]) -> Claims:
+    try:
+        scope = value["scope"]
+        if not isinstance(scope, list) or not _valid_scopes(scope):
+            raise ValueError
+        integer_fields = ("iat", "nbf", "exp")
+        if any(not isinstance(value[field], int) or isinstance(value[field], bool) for field in integer_fields):
+            raise ValueError
+        string_fields = ("ver", "iss", "sub", "aud", "jti", "htm", "htu", "body_sha256")
+        if any(not isinstance(value[field], str) for field in string_fields):
+            raise ValueError
+        claims = Claims(scope=tuple(scope), **{key: value[key] for key in string_fields + integer_fields})
+        if claims.ver != VERSION or not _PRINCIPAL.fullmatch(claims.iss) or claims.iss != claims.sub or claims.aud not in _AUDIENCES or not _TOKEN_ID.fullmatch(claims.jti) or claims.htm not in _METHODS or len(claims.body_sha256) != 64:
+            raise ValueError
+        bytes.fromhex(claims.body_sha256)
+        _normalize_path(claims.htu)
+        return claims
+    except (KeyError, TypeError, ValueError):
+        raise MachineIdentityError("machine_token_invalid") from None
+
+
+def _normalize_path(value: str) -> str:
+    split = urlsplit(value)
+    if not value.startswith("/") or split.scheme or split.netloc or split.query or split.fragment or "\\" in split.path or "//" in split.path or posixpath.normpath(split.path) != split.path:
+        raise ValueError("machine request path must be normalized and contain no query or fragment")
+    return split.path
+
+
+def _valid_scopes(scopes: Iterable[str]) -> bool:
+    values = tuple(scopes)
+    return 1 <= len(values) <= 4 and len(set(values)) == len(values) and all(scope in _SCOPES for scope in values)
+
+
+def _encode_json(value: dict[str, object]) -> str:
+    return _b64encode(json.dumps(value, ensure_ascii=True, separators=(",", ":"), sort_keys=True).encode("utf-8"))
+
+
+def _decode_object(value: str, expected_keys: set[str]) -> dict[str, object]:
+    try:
+        decoded = json.loads(_b64decode(value).decode("utf-8"))
+    except (UnicodeDecodeError, ValueError, json.JSONDecodeError):
+        raise MachineIdentityError("machine_token_invalid") from None
+    if not isinstance(decoded, dict) or set(decoded) != expected_keys:
+        raise MachineIdentityError("machine_token_invalid")
+    return decoded
+
+
+def _b64encode(value: bytes) -> str:
+    return base64.urlsafe_b64encode(value).rstrip(b"=").decode("ascii")
+
+
+def _b64decode(value: str) -> bytes:
+    if not value or "=" in value:
+        raise ValueError("invalid base64url")
+    decoded = base64.b64decode(value + "=" * (-len(value) % 4), altchars=b"-_", validate=True)
+    if _b64encode(decoded) != value:
+        raise ValueError("non-canonical base64url")
+    return decoded

Brain/src/yovision_brain/integration/machine_identity/transport.py

@@ -0,0 +1,37 @@
+"""Fail-closed HTTPS transport policy for Brain connectors."""
+
+from __future__ import annotations
+
+import ssl
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class TransportPolicy:
+    tls_min_version: str
+    verify_certificate: bool
+    verify_hostname: bool
+    connect_timeout_ms: int
+    response_header_timeout_ms: int
+    request_timeout_ms: int
+    max_request_bytes: int
+
+    def validate(self) -> None:
+        if (
+            self.tls_min_version not in {"1.2", "1.3"}
+            or not self.verify_certificate
+            or not self.verify_hostname
+            or not 100 <= self.connect_timeout_ms <= 30_000
+            or not 100 <= self.response_header_timeout_ms <= 30_000
+            or not 100 <= self.request_timeout_ms <= 60_000
+            or not 1 <= self.max_request_bytes <= 10 * 1024 * 1024
+        ):
+            raise ValueError("machine transport policy is unsafe")
+
+    def ssl_context(self) -> ssl.SSLContext:
+        self.validate()
+        context = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
+        context.minimum_version = ssl.TLSVersion.TLSv1_3 if self.tls_min_version == "1.3" else ssl.TLSVersion.TLSv1_2
+        context.check_hostname = True
+        context.verify_mode = ssl.CERT_REQUIRED
+        return context

Brain/tests/app/test_event_export_connector.py

@@ -0,0 +1,254 @@
+from __future__ import annotations
+
+import io
+import hashlib
+import json
+import re
+import urllib.error
+from pathlib import Path
+
+import pytest
+from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
+from cryptography.hazmat.primitives import serialization
+
+import yovision_brain.app.__main__ as cli
+import yovision_brain.integration.event_export.runtime as export_runtime
+from yovision_brain.integration.event_export import (
+    EventDeliveryError,
+    HTTPSMachineIdentitySender,
+)
+from yovision_brain.integration.machine_identity import (
+    KeyRecord,
+    Registry,
+    ReplayStore,
+    Signer,
+    TransportPolicy,
+    Verifier,
+    bearer_token,
+)
+
+FIXTURE = Path(__file__).parents[1] / "fixtures" / "events" / "area.json"
+
+
+def _policy() -> TransportPolicy:
+    return TransportPolicy(
+        tls_min_version="1.2",
+        verify_certificate=True,
+        verify_hostname=True,
+        connect_timeout_ms=1_000,
+        response_header_timeout_ms=1_000,
+        request_timeout_ms=2_000,
+        max_request_bytes=64 * 1024,
+    )
+
+
+class _Response:
+    status = 202
+
+    def __init__(self, body: bytes, request_id: str) -> None:
+        self.body = body
+        self.headers = {"X-Request-ID": request_id}
+        self.closed = False
+
+    def read(self, amount: int = -1) -> bytes:
+        return self.body[:amount] if amount >= 0 else self.body
+
+    def close(self) -> None:
+        self.closed = True
+
+
+class _VerifyingOpener:
+    def __init__(self, verifier: Verifier) -> None:
+        self.verifier = verifier
+        self.requests = []
+
+    def open(self, request, timeout: float) -> _Response:  # noqa: ANN001
+        self.requests.append((request, timeout))
+        body = request.data
+        self.verifier.verify(
+            bearer_token(request.get_header("Authorization")),
+            "yovision-sense",
+            "events:ingest",
+            request.method,
+            "/v1/events",
+            body,
+        )
+        event = json.loads(body)
+        return _Response(json.dumps({
+            "producer_id": event["producer_id"],
+            "source_event_id": event["source_event_id"],
+            "payload_sha256": hashlib.sha256(body).hexdigest(),
+            "disposition": "accepted",
+        }).encode(), request.get_header("X-request-id"))
+
+
+def test_sender_binds_exact_path_body_and_safe_request_id() -> None:
+    private_key = Ed25519PrivateKey.generate()
+    signer = Signer("yv:brain:school-a", "brain-key-0001", private_key, clock=lambda: 100)
+    registry = Registry(
+        [
+            KeyRecord(
+                principal="yv:brain:school-a",
+                key_id="brain-key-0001",
+                public_key=private_key.public_key(),
+                audience="yovision-sense",
+                scopes=frozenset({"events:ingest"}),
+            )
+        ]
+    )
+    opener = _VerifyingOpener(Verifier(registry, ReplayStore(), clock=lambda: 100))
+    sender = HTTPSMachineIdentitySender(
+        "https://sense.example:8443", signer, _policy(), opener=opener
+    )
+
+    result = sender.send(
+        b'{"producer_id":"brain-school-a","schema_version":"yovision.event/v1",'
+        b'"source_event_id":"evt-1"}'
+    )
+
+    request, timeout = opener.requests[0]
+    assert request.full_url == "https://sense.example:8443/v1/events"
+    assert request.method == "POST"
+    assert request.get_header("Content-type") == "application/json"
+    assert re.fullmatch(r"[A-Za-z0-9][A-Za-z0-9._:-]{15,127}", result.request_id)
+    assert request.get_header("X-request-id") == result.request_id
+    assert (result.disposition, timeout) == ("accepted", 2.0)
+
+
+def test_sender_rejects_plaintext_and_marks_conflict_terminal() -> None:
+    key = Ed25519PrivateKey.generate()
+    signer = Signer("yv:brain:school-a", "brain-key-0001", key)
+    with pytest.raises(ValueError, match="HTTPS origin"):
+        HTTPSMachineIdentitySender("http://sense.example", signer, _policy())
+
+    class ConflictOpener:
+        def open(self, request, timeout: float):  # noqa: ANN001, ARG002
+            raise urllib.error.HTTPError(
+                request.full_url,
+                409,
+                "Conflict",
+                {},
+                io.BytesIO(b'{"code":"event_identity_conflict"}'),
+            )
+
+    sender = HTTPSMachineIdentitySender(
+        "https://sense.example", signer, _policy(), opener=ConflictOpener()
+    )
+    with pytest.raises(EventDeliveryError) as caught:
+        sender.send(b"{}")
+    assert (caught.value.code, caught.value.terminal) == (
+        "event_identity_conflict",
+        True,
+    )
+
+
+def test_disabled_connector_keeps_existing_json_lines_output(tmp_path: Path) -> None:
+    raw = json.loads(FIXTURE.read_text(encoding="utf-8"))
+    raw["event_export"] = {"enabled": False}
+    config = tmp_path / "brain.json"
+    config.write_text(json.dumps(raw), encoding="utf-8")
+    output = tmp_path / "events.jsonl"
+
+    assert cli.main(["--config", str(config), "--output", str(output)]) == 0
+    assert json.loads(output.read_text(encoding="utf-8"))["schema"] == (
+        "brain.internal.event-candidate/v1"
+    )
+
+
+def test_delivery_failure_is_nonzero_and_not_silently_reported_as_success(
+    monkeypatch: pytest.MonkeyPatch,
+    capsys: pytest.CaptureFixture[str],
+    tmp_path: Path,
+) -> None:
+    class FailingSink:
+        def write(self, candidate) -> None:  # noqa: ANN001, ARG002
+            raise EventDeliveryError("event_delivery_unavailable", terminal=False)
+
+    monkeypatch.setattr(cli, "build_event_export_sink", lambda raw, base_dir: FailingSink())
+    unused_output = tmp_path / "disabled-json-lines-target"
+    unused_output.write_text("must remain unchanged", encoding="utf-8")
+    result = cli.main(
+        ["--config", str(FIXTURE), "--output", str(unused_output)]
+    )
+
+    assert result == 3
+    error = json.loads(capsys.readouterr().err.splitlines()[0])
+    assert error == {"status": "error", "message": "event_delivery_unavailable"}
+    assert unused_output.read_text(encoding="utf-8") == "must remain unchanged"
+
+
+def test_inline_private_key_material_is_rejected_without_echo(
+    tmp_path: Path, capsys: pytest.CaptureFixture[str]
+) -> None:
+    raw = json.loads(FIXTURE.read_text(encoding="utf-8"))
+    marker = "INLINE-PRIVATE-MATERIAL-MUST-NOT-LEAK"
+    raw["event_export"] = {
+        "enabled": True,
+        "endpoint": "https://sense.example",
+        "producer_id": "brain-school-a",
+        "site_ref": "site-school-a",
+        "severity": "high",
+        "region_refs": {},
+        "crossing_directions": {},
+        "machine_identity": {
+            "principal": "yv:brain:school-a",
+            "key_id": "brain-key-0001",
+            "private_key_path": "external.pem",
+            "private_key": marker,
+        },
+        "transport": {},
+    }
+    config = tmp_path / "brain.json"
+    config.write_text(json.dumps(raw), encoding="utf-8")
+
+    assert cli.main(["--config", str(config)]) == 3
+    assert marker not in capsys.readouterr().err
+
+
+def test_enabled_config_loads_machine_key_only_from_external_path(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    key_path = tmp_path / "brain-machine.pem"
+    key_path.write_bytes(
+        Ed25519PrivateKey.generate().private_bytes(
+            serialization.Encoding.PEM,
+            serialization.PrivateFormat.PKCS8,
+            serialization.NoEncryption(),
+        )
+    )
+    captured = {}
+
+    class Sender:
+        def __init__(self, endpoint, signer, policy) -> None:  # noqa: ANN001
+            captured.update(endpoint=endpoint, signer=signer, policy=policy)
+
+    monkeypatch.setattr(export_runtime, "HTTPSMachineIdentitySender", Sender)
+    sink = export_runtime.build_event_export_sink(
+        {
+            "enabled": True,
+            "endpoint": "https://sense.example",
+            "producer_id": "brain-school-a",
+            "site_ref": "site-school-a",
+            "severity": "high",
+            "region_refs": {},
+            "crossing_directions": {},
+            "machine_identity": {
+                "principal": "yv:brain:school-a",
+                "key_id": "brain-key-0001",
+                "private_key_path": key_path.name,
+            },
+            "transport": {
+                "tls_min_version": "1.2",
+                "verify_certificate": True,
+                "verify_hostname": True,
+                "connect_timeout_ms": 1_000,
+                "response_header_timeout_ms": 1_000,
+                "request_timeout_ms": 2_000,
+                "max_request_bytes": 64 * 1024,
+            },
+        },
+        base_dir=tmp_path,
+    )
+
+    assert sink is not None
+    assert captured["endpoint"] == "https://sense.example"

Brain/tests/integration/event_export/test_mapper.py

@@ -0,0 +1,148 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+
+from yovision_brain.events import INTERNAL_EVENT_SCHEMA, InternalEventCandidate
+from yovision_brain.integration.event_export import EventExportError, canonical_json, export_event, payload_sha256
+
+ROOT = Path(__file__).resolve().parents[4]
+
+
+def _candidate(**changes: object) -> InternalEventCandidate:
+    values: dict[str, object] = {
+        "schema": INTERNAL_EVENT_SCHEMA,
+        "event_id": "evt-area-20260831-0001",
+        "logical_input_id": "camera-east-gate",
+        "event_type": "danger_area_entered",
+        "occurred_at_ns": 1_788_134_401_125_000_000,
+        "rule_id": "rule-east-danger",
+        "rule_version": "3",
+        "model_name": "anonymous-detector",
+        "model_version": "2026.08",
+        "profile_id": "profile-main-stream",
+        "frame_width": 100,
+        "frame_height": 100,
+        "track_id": "track-0042",
+        "observation": {
+            "category": "anonymous_target",
+            "confidence": 0.93,
+            "box": {"left": 12, "top": 20, "right": 31, "bottom": 74},
+            "anchor": {"x": 0.21, "y": 0.74},
+        },
+        "reason": "entered polygon",
+    }
+    values.update(changes)
+    return InternalEventCandidate(**values)  # type: ignore[arg-type]
+
+
+def _fixture(relative: str) -> dict[str, object]:
+    return json.loads((ROOT / relative).read_text(encoding="utf-8"))
+
+
+def test_brain_mapper_matches_frozen_producer_fixture_and_jcs_digest() -> None:
+    pending = _fixture("contracts/evidence/v1/examples/pending.json")
+    expected = _fixture("contracts/events/v1/examples/dangerous-area.json")
+    event = export_event(
+        _candidate(),
+        producer_id="brain-school-a",
+        site_ref="site-school-a",
+        severity="high",
+        evidence=[pending],
+        region_ref="region-east-danger",
+    )
+
+    assert event == expected
+    assert payload_sha256(event) == "4cc1e93820195caf713ea675ff33f178c9d4997dd8a81cb61287e9fea0e3d5e1"
+
+
+def test_retry_mapping_preserves_original_identity_and_payload() -> None:
+    candidate = _candidate()
+    arguments = {
+        "producer_id": "brain-school-a",
+        "site_ref": "site-school-a",
+        "severity": "high",
+        "evidence": [_fixture("contracts/evidence/v1/examples/pending.json")],
+        "region_ref": "region-east-danger",
+    }
+    first = export_event(candidate, **arguments)
+    retry = export_event(candidate, **arguments)
+
+    assert (first["producer_id"], first["source_event_id"]) == (
+        "brain-school-a",
+        candidate.event_id,
+    )
+    assert retry == first
+    assert payload_sha256(retry) == payload_sha256(first)
+
+
+@pytest.mark.parametrize("fixture", ["pending.json", "failed.json"])
+def test_evidence_degradation_states_are_exported_unchanged(fixture: str) -> None:
+    evidence = _fixture(f"contracts/evidence/v1/examples/{fixture}")
+    candidate = _candidate()
+    if fixture == "failed.json":
+        candidate = _candidate(
+            event_id="evt-line-20260831-0002",
+            logical_input_id="camera-north-corridor",
+            event_type="directional_line_crossed",
+            occurred_at_ns=1_788_134_590_000_000_000,
+            rule_id="rule-north-one-way",
+            rule_version="1",
+            track_id="track-0088",
+            observation={"category": "anonymous_target", "confidence": 0.88},
+        )
+    event = export_event(
+        candidate,
+        producer_id="brain-school-a",
+        site_ref="site-school-a",
+        severity="medium" if fixture == "failed.json" else "high",
+        evidence=[evidence],
+        region_ref="line-north-one-way" if fixture == "failed.json" else "region-east-danger",
+        crossing_direction="b_to_a" if fixture == "failed.json" else None,
+    )
+
+    assert event["evidence"] == [evidence]
+
+
+@pytest.mark.parametrize(
+    "unsafe",
+    [
+        {"local_path": "D:/captures/frame.jpg"},
+        {"url": "https://example.invalid/signed"},
+        {"token": "not-a-real-token"},
+    ],
+)
+def test_evidence_rejects_paths_urls_and_sensitive_fields(unsafe: dict[str, object]) -> None:
+    evidence = _fixture("contracts/evidence/v1/examples/pending.json")
+    evidence.update(unsafe)
+    with pytest.raises(EventExportError, match="forbidden"):
+        export_event(
+            _candidate(),
+            producer_id="brain-school-a",
+            site_ref="site-school-a",
+            severity="high",
+            evidence=[evidence],
+            region_ref="region-east-danger",
+        )
+
+
+def test_failed_evidence_cannot_claim_success_content() -> None:
+    evidence = _fixture("contracts/evidence/v1/examples/failed.json")
+    evidence["content_type"] = "video/mp4"
+    with pytest.raises(EventExportError, match="failed evidence"):
+        export_event(
+            _candidate(),
+            producer_id="brain-school-a",
+            site_ref="site-school-a",
+            severity="high",
+            evidence=[evidence],
+            region_ref="region-east-danger",
+        )
+
+
+def test_jcs_normalizes_number_lexemes_and_negative_zero() -> None:
+    assert canonical_json({"small": 1e-7, "fixed": 1e20, "zero": -0.0}) == (
+        '{"fixed":100000000000000000000,"small":1e-7,"zero":0}'
+    )

Brain/tests/integration/event_export/test_replay.py

@@ -0,0 +1,56 @@
+from __future__ import annotations
+
+from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
+import pytest
+
+from yovision_brain.integration.event_export import SQLiteReplayCache
+from yovision_brain.integration.machine_identity import (
+    KeyRecord,
+    MachineIdentityError,
+    Registry,
+    Signer,
+    Verifier,
+)
+
+
+def test_replay_cache_rejects_same_jti_after_connector_restart(tmp_path) -> None:
+    now = 1_800_000_000
+    private_key = Ed25519PrivateKey.generate()
+    registry = Registry(
+        [
+            KeyRecord(
+                principal="yv:brain:node-a",
+                key_id="brain-key-0001",
+                public_key=private_key.public_key(),
+                audience="yovision-sense",
+                scopes=frozenset({"events:ingest"}),
+            )
+        ]
+    )
+    token = Signer(
+        "yv:brain:node-a",
+        "brain-key-0001",
+        private_key,
+        clock=lambda: now,
+    ).mint("yovision-sense", ["events:ingest"], "POST", "/v1/events", b"{}")
+    database = tmp_path / "machine-replay.sqlite3"
+
+    first_process = Verifier(registry, SQLiteReplayCache(database), clock=lambda: now)
+    claims = first_process.verify(
+        token, "yovision-sense", "events:ingest", "POST", "/v1/events", b"{}"
+    )
+    assert claims.iss == "yv:brain:node-a"
+
+    restarted_process = Verifier(registry, SQLiteReplayCache(database), clock=lambda: now)
+    with pytest.raises(MachineIdentityError, match="machine_token_replayed") as caught:
+        restarted_process.verify(
+            token, "yovision-sense", "events:ingest", "POST", "/v1/events", b"{}"
+        )
+    assert caught.value.code == "machine_token_replayed"
+
+
+def test_replay_cache_atomically_reuses_expired_identity(tmp_path) -> None:
+    cache = SQLiteReplayCache(tmp_path / "machine-replay.sqlite3")
+    assert cache.consume("yv:brain:node-a", "jti-one", expires_at=110, now=100)
+    assert not cache.consume("yv:brain:node-a", "jti-one", expires_at=110, now=101)
+    assert cache.consume("yv:brain:node-a", "jti-one", expires_at=130, now=110)

Sense/server/app/sense/integration/bell_connector/client.go

@@ -0,0 +1,187 @@
+package bell_connector
+
+import (
+	"bytes"
+	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/machine_identity"
+)
+
+type HTTPDoer interface {
+	Do(*http.Request) (*http.Response, error)
+}
+
+var requestIDPattern = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9._:-]{15,127}$`)
+
+type Client struct {
+	Endpoint        string
+	RelayID         string
+	Signer          machine_identity.Signer
+	HTTP            HTTPDoer
+	Enabled         bool
+	MaxRequestBytes int64
+}
+
+func NewClient(endpoint, relayID string, signer machine_identity.Signer, policy machine_identity.TransportPolicy) (*Client, error) {
+	parsed, err := url.Parse(endpoint)
+	if err != nil || parsed.Scheme != "https" || parsed.Host == "" || parsed.User != nil || parsed.Path != "" || parsed.RawQuery != "" || parsed.Fragment != "" {
+		return nil, errors.New("Bell connector endpoint must be an HTTPS origin")
+	}
+	httpClient, err := policy.HTTPClient()
+	if err != nil {
+		return nil, err
+	}
+	return &Client{Endpoint: strings.TrimRight(endpoint, "/"), RelayID: relayID, Signer: signer, HTTP: httpClient, Enabled: true, MaxRequestBytes: policy.MaxRequestBytes}, nil
+}
+
+func (c Client) Send(ctx context.Context, body []byte) (IngestResult, error) {
+	if !c.Enabled {
+		return IngestResult{}, &DeliveryError{Code: "connector_disabled", Detail: "Bell connector is disabled", Terminal: true}
+	}
+	if c.HTTP == nil || !json.Valid(body) || (strings.TrimSpace(c.RelayID) != "" && !safeIdentifier(c.RelayID)) {
+		return IngestResult{}, errors.New("Bell connector is not configured")
+	}
+	maximum := c.MaxRequestBytes
+	if maximum == 0 {
+		maximum = MaxInboundBytes
+	}
+	if maximum < 1 || int64(len(body)) > maximum {
+		return IngestResult{}, &DeliveryError{Code: "event_request_too_large", Detail: "event exceeds the configured request limit", Terminal: true}
+	}
+	requestID, err := newRequestID()
+	if err != nil {
+		return IngestResult{}, fmt.Errorf("generate request correlation id: %w", err)
+	}
+	token, err := c.Signer.Mint("yovision-bell", []string{"events:ingest"}, http.MethodPost, "/v1/events", body)
+	if err != nil {
+		return IngestResult{}, fmt.Errorf("mint Bell machine token: %w", err)
+	}
+	request, err := http.NewRequestWithContext(ctx, http.MethodPost, strings.TrimRight(c.Endpoint, "/")+"/v1/events", bytes.NewReader(body))
+	if err != nil {
+		return IngestResult{}, err
+	}
+	request.Header.Set("Authorization", "Bearer "+token)
+	request.Header.Set("Content-Type", "application/json")
+	request.Header.Set("X-Request-ID", requestID)
+	if strings.TrimSpace(c.RelayID) != "" {
+		request.Header.Set("X-YoVision-Relay-ID", c.RelayID)
+	}
+	response, err := c.HTTP.Do(request)
+	if err != nil {
+		return IngestResult{}, fmt.Errorf("deliver event to Bell: %w", err)
+	}
+	defer response.Body.Close()
+	responseBody, err := io.ReadAll(io.LimitReader(response.Body, 64*1024+1))
+	if err != nil || len(responseBody) > 64*1024 {
+		return IngestResult{}, errors.New("Bell response is invalid")
+	}
+	if response.StatusCode == http.StatusCreated || response.StatusCode == http.StatusOK {
+		if response.Header.Get("X-Request-ID") != requestID {
+			return IngestResult{}, errors.New("Bell response request id is invalid")
+		}
+		var result IngestResult
+		if json.Unmarshal(responseBody, &result) != nil || result.EventID == "" || result.PayloadSHA256 == "" || (result.Disposition != "created" && result.Disposition != "duplicate") {
+			return IngestResult{}, errors.New("Bell response is invalid")
+		}
+		identity, parseErr := parseEventIdentity(body)
+		if parseErr != nil || result.ProducerID != identity.ProducerID || result.SourceEventID != identity.SourceEventID {
+			return IngestResult{}, errors.New("Bell response changed event identity")
+		}
+		canonical, canonicalErr := canonicalPayload(body)
+		if canonicalErr != nil {
+			return IngestResult{}, errors.New("delivered event cannot be canonicalized")
+		}
+		digest := sha256.Sum256(canonical)
+		if result.PayloadSHA256 != hex.EncodeToString(digest[:]) {
+			return IngestResult{}, errors.New("Bell response payload digest does not match the delivered event")
+		}
+		return result, nil
+	}
+	var problem Problem
+	_ = json.Unmarshal(responseBody, &problem)
+	terminal := response.StatusCode >= 400 && response.StatusCode < 500 && response.StatusCode != http.StatusTooManyRequests
+	if problem.Code == "" {
+		problem.Code = "bell_unavailable"
+	}
+	return IngestResult{}, &DeliveryError{Code: problem.Code, Detail: problem.Message, Terminal: terminal}
+}
+
+func newRequestID() (string, error) {
+	raw := make([]byte, 16)
+	if _, err := rand.Read(raw); err != nil {
+		return "", err
+	}
+	value := base64.RawURLEncoding.EncodeToString(raw)
+	if !requestIDPattern.MatchString(value) {
+		return "", errors.New("generated request id is invalid")
+	}
+	return value, nil
+}
+
+func canonicalPayload(raw []byte) ([]byte, error) {
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.UseNumber()
+	var value any
+	if err := decoder.Decode(&value); err != nil {
+		return nil, err
+	}
+	value, err := normalizeJCSNumbers(value)
+	if err != nil {
+		return nil, err
+	}
+	var buffer bytes.Buffer
+	encoder := json.NewEncoder(&buffer)
+	encoder.SetEscapeHTML(false)
+	if err := encoder.Encode(value); err != nil {
+		return nil, err
+	}
+	canonical := bytes.TrimSuffix(buffer.Bytes(), []byte("\n"))
+	canonical = bytes.ReplaceAll(canonical, []byte(`\u2028`), []byte("\u2028"))
+	canonical = bytes.ReplaceAll(canonical, []byte(`\u2029`), []byte("\u2029"))
+	return canonical, nil
+}
+
+func normalizeJCSNumbers(value any) (any, error) {
+	switch typed := value.(type) {
+	case json.Number:
+		number, err := strconv.ParseFloat(string(typed), 64)
+		if err != nil || math.IsNaN(number) || math.IsInf(number, 0) {
+			return nil, errors.New("JSON number is outside the RFC 8785 domain")
+		}
+		if number == 0 {
+			return float64(0), nil
+		}
+		return number, nil
+	case []any:
+		for index, item := range typed {
+			normalized, err := normalizeJCSNumbers(item)
+			if err != nil {
+				return nil, err
+			}
+			typed[index] = normalized
+		}
+	case map[string]any:
+		for key, item := range typed {
+			normalized, err := normalizeJCSNumbers(item)
+			if err != nil {
+				return nil, err
+			}
+			typed[key] = normalized
+		}
+	}
+	return value, nil
+}

Sense/server/app/sense/integration/bell_connector/handlers.go

@@ -0,0 +1,144 @@
+package bell_connector
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"regexp"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/machine_identity"
+)
+
+const MaxInboundBytes = 64 * 1024
+
+var inboundRequestIDPattern = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9._:-]{15,127}$`)
+
+type IngressHandler struct {
+	DB              *gorm.DB
+	Verifier        machine_identity.Verifier
+	EvidenceOwnerID string
+	Now             func() time.Time
+}
+
+func (h IngressHandler) Post(c *gin.Context) {
+	if !prepareMachineRequest(c, "/v1/events") {
+		return
+	}
+	body, err := io.ReadAll(http.MaxBytesReader(c.Writer, c.Request.Body, MaxInboundBytes))
+	if err != nil {
+		problem(c, http.StatusBadRequest, "invalid_event", "event payload is invalid or too large")
+		return
+	}
+	token, err := machine_identity.BearerToken(c.GetHeader("Authorization"))
+	if err != nil {
+		problem(c, http.StatusUnauthorized, machineCode(err), "machine identity was rejected")
+		return
+	}
+	if _, err = h.Verifier.Verify(token, "yovision-sense", "events:ingest", c.Request.Method, c.Request.URL.EscapedPath(), body); err != nil {
+		status := http.StatusUnauthorized
+		if code := machineCode(err); code == "machine_scope_denied" || code == "machine_audience_denied" {
+			status = http.StatusForbidden
+		}
+		problem(c, status, machineCode(err), "machine identity was rejected")
+		return
+	}
+	now := time.Now().UTC()
+	if h.Now != nil {
+		now = h.Now().UTC()
+	}
+	result, err := AcceptEvent(c.Request.Context(), h.DB, body, h.EvidenceOwnerID, now)
+	if errors.Is(err, ErrInboundConflict) {
+		problem(c, http.StatusConflict, "idempotency_conflict", "event identity is bound to another payload")
+		return
+	}
+	if err != nil {
+		problem(c, http.StatusBadRequest, "invalid_event", "event payload was rejected")
+		return
+	}
+	status := http.StatusAccepted
+	if result.Disposition == "duplicate" {
+		status = http.StatusOK
+	}
+	c.JSON(status, result)
+}
+
+type EvidenceHandler struct {
+	DB       *gorm.DB
+	Verifier machine_identity.Verifier
+	Now      func() time.Time
+}
+
+func (h EvidenceHandler) Get(c *gin.Context) {
+	path := c.Request.URL.EscapedPath()
+	if !prepareMachineRequest(c, path) || !safeIdentifier(c.Param("evidence_id")) {
+		if !c.Writer.Written() {
+			problem(c, http.StatusBadRequest, "evidence_not_found", "evidence reference is invalid")
+		}
+		return
+	}
+	token, err := machine_identity.BearerToken(c.GetHeader("Authorization"))
+	if err != nil {
+		problem(c, http.StatusUnauthorized, machineCode(err), "machine identity was rejected")
+		return
+	}
+	if _, err = h.Verifier.Verify(token, "yovision-sense", "evidence:read", c.Request.Method, path, nil); err != nil {
+		status := http.StatusUnauthorized
+		if code := machineCode(err); code == "machine_scope_denied" || code == "machine_audience_denied" {
+			status = http.StatusForbidden
+		}
+		problem(c, status, machineCode(err), "machine identity was rejected")
+		return
+	}
+	var record EvidenceRecord
+	if err = h.DB.WithContext(c.Request.Context()).First(&record, "evidence_id = ?", c.Param("evidence_id")).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			problem(c, http.StatusNotFound, "evidence_not_found", "evidence reference is unknown")
+			return
+		}
+		problem(c, http.StatusServiceUnavailable, "evidence_unavailable", "evidence metadata is temporarily unavailable")
+		return
+	}
+	now := time.Now().UTC()
+	if h.Now != nil {
+		now = h.Now().UTC()
+	}
+	if record.ExpiresAt != nil && !record.ExpiresAt.After(now) {
+		problem(c, http.StatusGone, "evidence_expired", "evidence reference has expired")
+		return
+	}
+	c.Data(http.StatusOK, "application/json", record.Payload)
+}
+
+func prepareMachineRequest(c *gin.Context, expectedPath string) bool {
+	requestID := c.GetHeader("X-Request-ID")
+	if requestID == "" {
+		requestID = uuid.NewString()
+	} else if !inboundRequestIDPattern.MatchString(requestID) {
+		problem(c, http.StatusBadRequest, "invalid_request_id", "X-Request-ID is invalid")
+		return false
+	}
+	c.Header("X-Request-ID", requestID)
+	if c.Request.URL.RawQuery != "" || c.Request.URL.Fragment != "" || c.Request.URL.EscapedPath() != expectedPath {
+		problem(c, http.StatusBadRequest, "invalid_request_target", "request target is invalid")
+		return false
+	}
+	return true
+}
+
+func machineCode(err error) string {
+	var machineErr *machine_identity.Error
+	if errors.As(err, &machineErr) {
+		return machineErr.Code
+	}
+	return "machine_token_invalid"
+}
+
+func problem(c *gin.Context, status int, code, message string) {
+	c.Header("Content-Type", "application/problem+json")
+	c.JSON(status, Problem{Code: code, Message: message})
+}

Sense/server/app/sense/integration/bell_connector/ingress.go

@@ -0,0 +1,130 @@
+package bell_connector
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+var ErrInboundConflict = errors.New("idempotency_conflict")
+
+func AcceptEvent(ctx context.Context, db *gorm.DB, payload []byte, evidenceOwnerID string, now time.Time) (AcceptResult, error) {
+	identity, err := parseEventIdentity(payload)
+	if err != nil {
+		return AcceptResult{}, err
+	}
+	canonical, err := canonicalPayload(payload)
+	if err != nil {
+		return AcceptResult{}, err
+	}
+	digestBytes := sha256.Sum256(canonical)
+	digest := hex.EncodeToString(digestBytes[:])
+	result := AcceptResult{ProducerID: identity.ProducerID, SourceEventID: identity.SourceEventID, PayloadSHA256: digest}
+	err = db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		if tx.Dialector.Name() == "postgres" {
+			key := fmt.Sprintf("%d:%s:%s", len(identity.ProducerID), identity.ProducerID, identity.SourceEventID)
+			if lockErr := tx.Exec("SELECT pg_advisory_xact_lock(hashtextextended(?, 0))", key).Error; lockErr != nil {
+				return lockErr
+			}
+		}
+		var existing InboundEvent
+		lookup := tx.Clauses(clause.Locking{Strength: "UPDATE"}).Where("producer_id = ? AND source_event_id = ?", identity.ProducerID, identity.SourceEventID).First(&existing).Error
+		if lookup == nil {
+			if existing.PayloadSHA256 != digest {
+				return ErrInboundConflict
+			}
+			result.Disposition = "duplicate"
+			return nil
+		}
+		if !errors.Is(lookup, gorm.ErrRecordNotFound) {
+			return lookup
+		}
+		fact := InboundEvent{ID: uuid.NewString(), ProducerID: identity.ProducerID, SourceEventID: identity.SourceEventID, Payload: append([]byte(nil), canonical...), PayloadSHA256: digest, ReceivedAt: now.UTC()}
+		if err := tx.Create(&fact).Error; err != nil {
+			return err
+		}
+		if _, err := EnqueueEvent(tx, canonical, now); err != nil {
+			return err
+		}
+		if err := retainEvidence(tx, canonical, evidenceOwnerID, now); err != nil {
+			return err
+		}
+		result.Disposition = "accepted"
+		return nil
+	})
+	return result, err
+}
+
+func retainEvidence(tx *gorm.DB, payload []byte, ownerID string, now time.Time) error {
+	var envelope struct {
+		Evidence []json.RawMessage `json:"evidence"`
+	}
+	decoder := json.NewDecoder(bytes.NewReader(payload))
+	if err := decoder.Decode(&envelope); err != nil {
+		return err
+	}
+	for _, raw := range envelope.Evidence {
+		var metadata struct {
+			EvidenceID string `json:"evidence_id"`
+			OwnerID    string `json:"owner_id"`
+			Status     string `json:"status"`
+			ExpiresAt  string `json:"expires_at"`
+		}
+		if err := json.Unmarshal(raw, &metadata); err != nil || !safeIdentifier(metadata.EvidenceID) || !safeIdentifier(metadata.OwnerID) {
+			return errors.New("invalid evidence metadata")
+		}
+		if ownerID != "" && metadata.OwnerID != ownerID {
+			continue
+		}
+		canonical, err := canonicalPayload(raw)
+		if err != nil {
+			return err
+		}
+		var expiresAt *time.Time
+		if metadata.ExpiresAt != "" {
+			parsed, parseErr := time.Parse(time.RFC3339Nano, metadata.ExpiresAt)
+			if parseErr != nil {
+				return parseErr
+			}
+			parsed = parsed.UTC()
+			expiresAt = &parsed
+		}
+		record := EvidenceRecord{EvidenceID: metadata.EvidenceID, OwnerID: metadata.OwnerID, Status: metadata.Status, Payload: canonical, ExpiresAt: expiresAt, UpdatedAt: now.UTC()}
+		var existing EvidenceRecord
+		lookup := tx.Clauses(clause.Locking{Strength: "UPDATE"}).First(&existing, "evidence_id = ?", metadata.EvidenceID).Error
+		if lookup == nil {
+			if existing.OwnerID != metadata.OwnerID || !validEvidenceTransition(existing.Status, metadata.Status) {
+				return errors.New("evidence metadata transition is invalid")
+			}
+		} else if !errors.Is(lookup, gorm.ErrRecordNotFound) {
+			return lookup
+		}
+		if err := tx.Clauses(clause.OnConflict{Columns: []clause.Column{{Name: "evidence_id"}}, DoUpdates: clause.AssignmentColumns([]string{"status", "payload", "expires_at", "updated_at"})}).Create(&record).Error; err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func validEvidenceTransition(from, to string) bool {
+	if from == to {
+		return true
+	}
+	switch from {
+	case "pending":
+		return to == "processing" || to == "success" || to == "failed"
+	case "processing":
+		return to == "success" || to == "failed"
+	default:
+		return false
+	}
+}

Sense/server/app/sense/integration/bell_connector/model.go

@@ -0,0 +1,79 @@
+package bell_connector
+
+import (
+	"encoding/json"
+	"time"
+)
+
+const OutboxType = "bell_event_v1"
+
+type eventIdentity struct {
+	SchemaVersion string `json:"schema_version"`
+	ProducerID    string `json:"producer_id"`
+	SourceEventID string `json:"source_event_id"`
+}
+
+type IngestResult struct {
+	EventID       string `json:"event_id"`
+	ProducerID    string `json:"producer_id"`
+	SourceEventID string `json:"source_event_id"`
+	Disposition   string `json:"disposition"`
+	PayloadSHA256 string `json:"payload_sha256"`
+}
+
+type Problem struct {
+	Code            string `json:"code"`
+	Message         string `json:"message"`
+	ExistingEventID string `json:"existing_event_id,omitempty"`
+}
+
+type DeliveryError struct {
+	Code       string
+	Detail     string
+	Terminal   bool
+	RetryAfter time.Duration
+}
+
+func (e *DeliveryError) Error() string { return e.Code + ": " + e.Detail }
+
+// ReplayToken is Sense-owned verification state for authenticated evidence
+// requests. It is never shared with Bell's replay table or business receipts.
+type ReplayToken struct {
+	Principal string    `gorm:"size:128;primaryKey"`
+	TokenID   string    `gorm:"size:64;primaryKey"`
+	ExpiresAt time.Time `gorm:"not null;index"`
+	CreatedAt time.Time `gorm:"not null"`
+}
+
+func (ReplayToken) TableName() string { return "sense_machine_token_replays" }
+
+// InboundEvent is the Sense-owned local fact for an event received from Brain.
+// The immutable payload and Bell Outbox row are created in one transaction.
+type InboundEvent struct {
+	ID            string          `gorm:"size:36;primaryKey"`
+	ProducerID    string          `gorm:"size:128;not null;uniqueIndex:sense_inbound_event_key"`
+	SourceEventID string          `gorm:"size:128;not null;uniqueIndex:sense_inbound_event_key"`
+	Payload       json.RawMessage `gorm:"column:payload;type:jsonb;not null"`
+	PayloadSHA256 string          `gorm:"type:char(64);not null"`
+	ReceivedAt    time.Time       `gorm:"not null"`
+}
+
+func (InboundEvent) TableName() string { return "sense_inbound_events" }
+
+type EvidenceRecord struct {
+	EvidenceID string          `gorm:"size:128;primaryKey"`
+	OwnerID    string          `gorm:"size:128;not null;index"`
+	Status     string          `gorm:"size:16;not null;index"`
+	Payload    json.RawMessage `gorm:"column:payload;type:jsonb;not null"`
+	ExpiresAt  *time.Time      `gorm:"index"`
+	UpdatedAt  time.Time       `gorm:"not null"`
+}
+
+func (EvidenceRecord) TableName() string { return "sense_evidence_metadata" }
+
+type AcceptResult struct {
+	ProducerID    string `json:"producer_id"`
+	SourceEventID string `json:"source_event_id"`
+	Disposition   string `json:"disposition"`
+	PayloadSHA256 string `json:"payload_sha256"`
+}

Sense/server/app/sense/integration/bell_connector/outbox.go

@@ -0,0 +1,166 @@
+package bell_connector
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/outbox"
+)
+
+func EnqueueEvent(tx *gorm.DB, payload []byte, now time.Time) (outbox.Message, error) {
+	identity, err := parseEventIdentity(payload)
+	if err != nil {
+		return outbox.Message{}, err
+	}
+	keyDigest := sha256.Sum256([]byte(identity.ProducerID + "\x00" + identity.SourceEventID))
+	return outbox.Enqueue(tx, outbox.EnqueueInput{
+		InternalType:   OutboxType,
+		BusinessRef:    identity.SourceEventID,
+		IdempotencyKey: "bell-event-v1:" + hex.EncodeToString(keyDigest[:]),
+		PayloadJSON:    append([]byte(nil), payload...),
+	}, now)
+}
+
+func parseEventIdentity(payload []byte) (eventIdentity, error) {
+	decoder := json.NewDecoder(bytes.NewReader(payload))
+	var identity eventIdentity
+	if err := decoder.Decode(&identity); err != nil || !json.Valid(payload) || identity.SchemaVersion != "yovision.event/v1" ||
+		!safeIdentifier(identity.ProducerID) || !safeIdentifier(identity.SourceEventID) {
+		return eventIdentity{}, errors.New("invalid yovision.event/v1 payload")
+	}
+	return identity, nil
+}
+
+func safeIdentifier(value string) bool {
+	if value == "" || len(value) > 128 || strings.ContainsAny(value, "\\/@\x00\r\n") {
+		return false
+	}
+	for index, r := range value {
+		allowed := r >= 'A' && r <= 'Z' || r >= 'a' && r <= 'z' || r >= '0' && r <= '9' || (index > 0 && strings.ContainsRune("._:-", r))
+		if !allowed {
+			return false
+		}
+	}
+	return true
+}
+
+type Relay struct {
+	DB      *gorm.DB
+	Client  *Client
+	Now     func() time.Time
+	Backoff func(int) time.Duration
+}
+
+func (r Relay) DeliverBatch(ctx context.Context, worker string, limit int) (int, error) {
+	if r.DB == nil || r.Client == nil || strings.TrimSpace(worker) == "" || limit < 1 || limit > 100 {
+		return 0, errors.New("invalid Bell relay configuration")
+	}
+	items, err := r.claim(worker, limit)
+	if err != nil {
+		return 0, err
+	}
+	delivered := 0
+	queueRelay := outbox.NewRelay(r.DB)
+	queueRelay.Now = r.now
+	if r.Backoff != nil {
+		queueRelay.Backoff = r.Backoff
+	}
+	for _, item := range items {
+		_, deliveryErr := r.Client.Send(ctx, []byte(item.PayloadJSON))
+		if deliveryErr == nil {
+			if err = queueRelay.MarkSuccess(item.ID, worker); err != nil {
+				return delivered, err
+			}
+			delivered++
+			continue
+		}
+		var classified *DeliveryError
+		if errors.As(deliveryErr, &classified) && classified.Terminal {
+			if err = r.markTerminal(item, worker, classified.Code); err != nil {
+				return delivered, err
+			}
+			continue
+		}
+		if err = queueRelay.MarkFailure(item.ID, worker, deliveryErr.Error()); err != nil {
+			return delivered, err
+		}
+	}
+	return delivered, nil
+}
+
+func (r Relay) claim(worker string, limit int) ([]outbox.Message, error) {
+	now := r.now()
+	leaseUntil := now.Add(30 * time.Second)
+	claimed := make([]outbox.Message, 0, limit)
+	err := r.DB.Transaction(func(tx *gorm.DB) error {
+		var candidates []outbox.Message
+		query := tx.Where("internal_type = ? AND (((state IN ?) AND available_at <= ?) OR (state = ? AND lease_until < ?))", OutboxType, []string{outbox.StatePending, outbox.StateRetry}, now, outbox.StateProcessing, now).Order("available_at, created_at").Limit(limit)
+		if tx.Dialector.Name() == "postgres" {
+			query = query.Clauses(clause.Locking{Strength: "UPDATE", Options: "SKIP LOCKED"})
+		}
+		if err := query.Find(&candidates).Error; err != nil {
+			return err
+		}
+		for _, item := range candidates {
+			result := tx.Model(&outbox.Message{}).Where("id = ? AND version = ?", item.ID, item.Version).Updates(map[string]any{"state": outbox.StateProcessing, "lease_owner": worker, "lease_until": leaseUntil, "version": gorm.Expr("version + 1"), "updated_at": now})
+			if result.Error != nil {
+				return result.Error
+			}
+			if result.RowsAffected == 1 {
+				item.State, item.LeaseOwner, item.LeaseUntil, item.Version = outbox.StateProcessing, worker, &leaseUntil, item.Version+1
+				claimed = append(claimed, item)
+			}
+		}
+		return nil
+	})
+	return claimed, err
+}
+
+func (r Relay) markTerminal(item outbox.Message, worker, detail string) error {
+	now := r.now()
+	return r.DB.Transaction(func(tx *gorm.DB) error {
+		result := tx.Model(&outbox.Message{}).Where("id = ? AND state = ? AND lease_owner = ?", item.ID, outbox.StateProcessing, worker).Updates(map[string]any{
+			"state": outbox.StateDead, "attempt_count": gorm.Expr("attempt_count + 1"), "last_error": detail,
+			"lease_owner": "", "lease_until": nil, "version": gorm.Expr("version + 1"), "updated_at": now,
+		})
+		if result.Error != nil || result.RowsAffected != 1 {
+			if result.Error != nil {
+				return result.Error
+			}
+			return errors.New("Bell outbox lease lost")
+		}
+		return tx.Create(&outbox.Attempt{MessageID: item.ID, Number: item.AttemptCount + 1, Outcome: outbox.StateDead, Detail: detail, Worker: worker, CreatedAt: now}).Error
+	})
+}
+
+func (r Relay) now() time.Time {
+	if r.Now != nil {
+		return r.Now().UTC()
+	}
+	return time.Now().UTC()
+}
+
+func PreserveIdentity(before, after []byte) error {
+	left, err := parseEventIdentity(before)
+	if err != nil {
+		return err
+	}
+	right, err := parseEventIdentity(after)
+	if err != nil {
+		return err
+	}
+	if left.ProducerID != right.ProducerID || left.SourceEventID != right.SourceEventID {
+		return fmt.Errorf("relay changed original event identity")
+	}
+	return nil
+}

Sense/server/app/sense/integration/bell_connector/replay.go

@@ -0,0 +1,29 @@
+package bell_connector
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+type PersistentReplayStore struct{ DB *gorm.DB }
+
+func (s PersistentReplayStore) Consume(principal, tokenID string, expiresAt, now time.Time) bool {
+	if s.DB == nil {
+		return false
+	}
+	accepted := false
+	err := s.DB.Transaction(func(tx *gorm.DB) error {
+		if err := tx.Where("expires_at <= ?", now.UTC()).Delete(&ReplayToken{}).Error; err != nil {
+			return err
+		}
+		result := tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&ReplayToken{Principal: principal, TokenID: tokenID, ExpiresAt: expiresAt.UTC(), CreatedAt: now.UTC()})
+		if result.Error != nil {
+			return result.Error
+		}
+		accepted = result.RowsAffected == 1
+		return nil
+	})
+	return err == nil && accepted
+}

Sense/server/app/sense/integration/bell_connector/runtime.go

@@ -0,0 +1,89 @@
+package bell_connector
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/machine_identity"
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/outbox"
+)
+
+type Environment func(string) string
+
+func StartRuntime(ctx context.Context, engine *gin.Engine, db *gorm.DB, getenv Environment) error {
+	if getenv == nil {
+		getenv = os.Getenv
+	}
+	ingressEnabled := enabled(getenv("SENSE_EVENT_INGRESS_ENABLED"))
+	relayEnabled := enabled(getenv("SENSE_BELL_CONNECTOR_ENABLED"))
+	if !ingressEnabled && !relayEnabled {
+		return nil
+	}
+	if engine == nil || db == nil {
+		return errors.New("Sense connector runtime requires engine and database")
+	}
+	for _, model := range []any{&InboundEvent{}, &EvidenceRecord{}, &ReplayToken{}, &outbox.Message{}, &outbox.DeliveryRecord{}, &outbox.Attempt{}} {
+		if !db.Migrator().HasTable(model) {
+			return fmt.Errorf("Sense connector migration is not applied for %T", model)
+		}
+	}
+	if ingressEnabled {
+		registry, err := machine_identity.LoadRegistry(getenv("SENSE_MACHINE_PRINCIPAL_REGISTRY"), "yovision-sense")
+		if err != nil {
+			return fmt.Errorf("load Sense machine identity registry: %w", err)
+		}
+		verifier := machine_identity.Verifier{Registry: registry, Replay: PersistentReplayStore{DB: db}}
+		engine.POST("/v1/events", (IngressHandler{DB: db, Verifier: verifier, EvidenceOwnerID: strings.TrimSpace(getenv("SENSE_EVIDENCE_OWNER_ID"))}).Post)
+		engine.GET("/v1/evidence/:evidence_id", (EvidenceHandler{DB: db, Verifier: verifier}).Get)
+	}
+	if !relayEnabled {
+		return nil
+	}
+	privateKey, err := machine_identity.LoadPrivateKey(getenv("SENSE_BELL_PRIVATE_KEY_PATH"))
+	if err != nil {
+		return err
+	}
+	signer := machine_identity.Signer{Principal: strings.TrimSpace(getenv("SENSE_BELL_PRINCIPAL_ID")), KeyID: strings.TrimSpace(getenv("SENSE_BELL_KEY_ID")), PrivateKey: privateKey}
+	policy := machine_identity.TransportPolicy{TLSMinVersion: tls.VersionTLS12, VerifyCertificate: true, VerifyHostname: true, ConnectTimeout: 5 * time.Second, ResponseHeaderTimeout: 10 * time.Second, RequestTimeout: 15 * time.Second, MaxRequestBytes: MaxInboundBytes}
+	client, err := NewClient(strings.TrimSpace(getenv("SENSE_BELL_ENDPOINT")), strings.TrimSpace(getenv("SENSE_RELAY_ID")), signer, policy)
+	if err != nil {
+		return err
+	}
+	interval := 2 * time.Second
+	if raw := strings.TrimSpace(getenv("SENSE_BELL_RELAY_INTERVAL_MS")); raw != "" {
+		milliseconds, parseErr := strconv.Atoi(raw)
+		if parseErr != nil || milliseconds < 100 || milliseconds > 60000 {
+			return errors.New("SENSE_BELL_RELAY_INTERVAL_MS must be between 100 and 60000")
+		}
+		interval = time.Duration(milliseconds) * time.Millisecond
+	}
+	go runRelay(ctx, Relay{DB: db, Client: client}, interval)
+	return nil
+}
+
+func runRelay(ctx context.Context, relay Relay, interval time.Duration) {
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-ticker.C:
+			if _, err := relay.DeliverBatch(ctx, "sense-bell-runtime", 50); err != nil && ctx.Err() == nil {
+				log.Printf("Sense Bell connector delivery failed: %v", err)
+			}
+		}
+	}
+}
+
+func enabled(value string) bool { return strings.EqualFold(strings.TrimSpace(value), "true") }

Sense/server/app/sense/integration/machine_identity/registry.go

@@ -0,0 +1,68 @@
+package machine_identity
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"io"
+	"os"
+	"strings"
+)
+
+type registryDocument struct {
+	Version    string              `json:"version"`
+	Audience   string              `json:"audience"`
+	Principals []registryPrincipal `json:"principals"`
+}
+
+type registryPrincipal struct {
+	PrincipalID string        `json:"principal_id"`
+	Enabled     bool          `json:"enabled"`
+	Keys        []registryKey `json:"keys"`
+}
+
+type registryKey struct {
+	KeyID     string   `json:"kid"`
+	PublicKey string   `json:"public_key_base64url"`
+	Status    string   `json:"status"`
+	Scopes    []string `json:"scopes"`
+}
+
+func LoadRegistry(filePath, expectedAudience string) (*Registry, error) {
+	if strings.TrimSpace(filePath) == "" || !validAudiences[expectedAudience] {
+		return nil, errors.New("machine principal registry path and audience are required")
+	}
+	raw, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, errors.New("read machine principal registry")
+	}
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.DisallowUnknownFields()
+	var document registryDocument
+	if err = decoder.Decode(&document); err != nil {
+		return nil, errors.New("invalid machine principal registry")
+	}
+	if err = decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		return nil, errors.New("invalid machine principal registry")
+	}
+	if document.Version != "yovision.machine-principal-registry/v1" || document.Audience != expectedAudience || len(document.Principals) == 0 {
+		return nil, errors.New("invalid machine principal registry")
+	}
+	records := make([]KeyRecord, 0)
+	for _, principal := range document.Principals {
+		if len(principal.Keys) == 0 {
+			return nil, errors.New("invalid machine principal registry")
+		}
+		for _, key := range principal.Keys {
+			publicKey, decodeErr := base64.RawURLEncoding.Strict().DecodeString(key.PublicKey)
+			if decodeErr != nil || len(publicKey) != ed25519.PublicKeySize || (key.Status != "active" && key.Status != "revoked") {
+				return nil, errors.New("invalid machine principal registry")
+			}
+			records = append(records, KeyRecord{Principal: principal.PrincipalID, KeyID: key.KeyID, PublicKey: ed25519.PublicKey(publicKey), Audience: document.Audience,
+				Scopes: key.Scopes, Enabled: principal.Enabled, Revoked: key.Status == "revoked"})
+		}
+	}
+	return NewRegistry(records...)
+}

Sense/server/app/sense/integration/machine_identity/token.go

@@ -0,0 +1,363 @@
+package machine_identity
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io"
+	"net/url"
+	"os"
+	"path"
+	"regexp"
+	"slices"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	principalPattern = regexp.MustCompile(`^yv:(sense|brain|bell):[a-z0-9][a-z0-9.-]{0,62}$`)
+	keyIDPattern     = regexp.MustCompile(`^[A-Za-z0-9._-]{8,64}$`)
+	tokenIDPattern   = regexp.MustCompile(`^[A-Za-z0-9_-]{22,64}$`)
+	validAudiences   = map[string]bool{"yovision-sense": true, "yovision-brain": true, "yovision-bell": true}
+	validScopes      = map[string]bool{"source-config:write": true, "runtime-status:write": true, "events:ingest": true, "evidence:read": true}
+)
+
+const (
+	Version       = "yovision.machine-identity/v1"
+	TokenType     = "YOVISION-MACHINE+JWT"
+	MaxLifetime   = 5 * time.Minute
+	AllowedSkew   = 30 * time.Second
+	MaxKeyOverlap = 24 * time.Hour
+)
+
+type Error struct{ Code string }
+
+func (e *Error) Error() string { return e.Code }
+
+func codeError(code string) error { return &Error{Code: code} }
+
+// BearerToken deliberately has no cookie or query fallback.
+func BearerToken(authorization string) (string, error) {
+	parts := strings.Split(authorization, " ")
+	if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") || parts[1] == "" || strings.ContainsAny(parts[1], " \t\r\n,") {
+		return "", codeError("machine_token_missing")
+	}
+	return parts[1], nil
+}
+
+type Claims struct {
+	Version    string   `json:"ver"`
+	Issuer     string   `json:"iss"`
+	Subject    string   `json:"sub"`
+	Audience   string   `json:"aud"`
+	Scopes     []string `json:"scope"`
+	IssuedAt   int64    `json:"iat"`
+	NotBefore  int64    `json:"nbf"`
+	ExpiresAt  int64    `json:"exp"`
+	TokenID    string   `json:"jti"`
+	Method     string   `json:"htm"`
+	Path       string   `json:"htu"`
+	BodySHA256 string   `json:"body_sha256"`
+}
+
+type protectedHeader struct {
+	Algorithm string `json:"alg"`
+	Type      string `json:"typ"`
+	KeyID     string `json:"kid"`
+	Version   string `json:"ver"`
+}
+
+type KeyRecord struct {
+	Principal string
+	KeyID     string
+	PublicKey ed25519.PublicKey
+	Audience  string
+	Scopes    []string
+	Enabled   bool
+	Revoked   bool
+}
+
+type Registry struct {
+	mu   sync.RWMutex
+	keys map[string]KeyRecord
+}
+
+func NewRegistry(records ...KeyRecord) (*Registry, error) {
+	r := &Registry{keys: make(map[string]KeyRecord, len(records))}
+	for _, record := range records {
+		if !keyIDPattern.MatchString(record.KeyID) || !principalPattern.MatchString(record.Principal) || !validAudiences[record.Audience] || len(record.PublicKey) != ed25519.PublicKeySize || !validScopeList(record.Scopes) {
+			return nil, errors.New("invalid machine key record")
+		}
+		if _, exists := r.keys[record.KeyID]; exists {
+			return nil, errors.New("duplicate machine key id")
+		}
+		record.PublicKey = slices.Clone(record.PublicKey)
+		record.Scopes = slices.Clone(record.Scopes)
+		r.keys[record.KeyID] = record
+	}
+	return r, nil
+}
+
+func (r *Registry) Lookup(keyID string) (KeyRecord, bool) {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	record, ok := r.keys[keyID]
+	record.PublicKey = slices.Clone(record.PublicKey)
+	record.Scopes = slices.Clone(record.Scopes)
+	return record, ok
+}
+
+func (r *Registry) Revoke(keyID string) bool {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	record, ok := r.keys[keyID]
+	if !ok {
+		return false
+	}
+	record.Revoked = true
+	r.keys[keyID] = record
+	return true
+}
+
+type ReplayStore struct {
+	mu   sync.Mutex
+	used map[string]time.Time
+}
+
+// ReplayCache must atomically persist accepted (principal, jti) pairs until
+// expiry. ReplayStore is process-local and intended for tests or a single
+// uninterrupted process; connector implementations inject a durable store.
+type ReplayCache interface {
+	Consume(principal, tokenID string, expiresAt, now time.Time) bool
+}
+
+func NewReplayStore() *ReplayStore { return &ReplayStore{used: map[string]time.Time{}} }
+
+func (s *ReplayStore) Consume(principal, tokenID string, expiresAt, now time.Time) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	for key, expiry := range s.used {
+		if !expiry.After(now) {
+			delete(s.used, key)
+		}
+	}
+	key := principal + "\x00" + tokenID
+	if _, exists := s.used[key]; exists {
+		return false
+	}
+	s.used[key] = expiresAt
+	return true
+}
+
+type Signer struct {
+	Principal  string
+	KeyID      string
+	PrivateKey ed25519.PrivateKey
+	Now        func() time.Time
+}
+
+func LoadPrivateKey(path string) (ed25519.PrivateKey, error) {
+	if strings.TrimSpace(path) == "" {
+		return nil, errors.New("machine private key path is required")
+	}
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return nil, errors.New("read machine private key")
+	}
+	block, rest := pem.Decode(raw)
+	if block == nil || len(bytes.TrimSpace(rest)) != 0 || block.Type != "PRIVATE KEY" {
+		return nil, errors.New("machine private key must be one PKCS#8 PEM block")
+	}
+	parsed, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, errors.New("parse machine private key")
+	}
+	key, ok := parsed.(ed25519.PrivateKey)
+	if !ok || len(key) != ed25519.PrivateKeySize {
+		return nil, errors.New("machine private key is not Ed25519")
+	}
+	return slices.Clone(key), nil
+}
+
+func (s Signer) Mint(audience string, scopes []string, method, requestPath string, body []byte) (string, error) {
+	if !principalPattern.MatchString(s.Principal) || !keyIDPattern.MatchString(s.KeyID) || len(s.PrivateKey) != ed25519.PrivateKeySize || !validAudiences[audience] || !validScopeList(scopes) {
+		return "", errors.New("incomplete machine signer configuration")
+	}
+	normalizedPath, err := normalizePath(requestPath)
+	if err != nil {
+		return "", err
+	}
+	method = strings.ToUpper(method)
+	if !allowedMethod(method) {
+		return "", errors.New("unsupported machine request method")
+	}
+	now := time.Now().UTC()
+	if s.Now != nil {
+		now = s.Now().UTC()
+	}
+	tokenID, err := randomTokenID()
+	if err != nil {
+		return "", err
+	}
+	digest := sha256.Sum256(body)
+	claims := Claims{Version: Version, Issuer: s.Principal, Subject: s.Principal, Audience: audience,
+		Scopes: slices.Clone(scopes), IssuedAt: now.Unix(), NotBefore: now.Unix(), ExpiresAt: now.Add(MaxLifetime).Unix(),
+		TokenID: tokenID, Method: method, Path: normalizedPath, BodySHA256: hex.EncodeToString(digest[:])}
+	header := protectedHeader{Algorithm: "EdDSA", Type: TokenType, KeyID: s.KeyID, Version: Version}
+	headerJSON, _ := json.Marshal(header)
+	claimsJSON, _ := json.Marshal(claims)
+	signingInput := rawBase64(headerJSON) + "." + rawBase64(claimsJSON)
+	signature := ed25519.Sign(s.PrivateKey, []byte(signingInput))
+	return signingInput + "." + rawBase64(signature), nil
+}
+
+type Verifier struct {
+	Registry *Registry
+	Replay   ReplayCache
+	Now      func() time.Time
+}
+
+func (v Verifier) Verify(token, audience, requiredScope, method, requestPath string, body []byte) (Claims, error) {
+	if v.Registry == nil || v.Replay == nil {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	parts := strings.Split(token, ".")
+	if len(parts) != 3 || strings.Contains(token, "=") {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	headerBytes, err := decodeRaw(parts[0])
+	if err != nil {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	var header protectedHeader
+	if err = decodeClosed(headerBytes, &header); err != nil || header.Algorithm != "EdDSA" || header.Type != TokenType || header.Version != Version || !keyIDPattern.MatchString(header.KeyID) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	record, ok := v.Registry.Lookup(header.KeyID)
+	if !ok {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	signature, err := decodeRaw(parts[2])
+	if err != nil || len(signature) != ed25519.SignatureSize || !ed25519.Verify(record.PublicKey, []byte(parts[0]+"."+parts[1]), signature) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	if !record.Enabled || record.Revoked {
+		return Claims{}, codeError("machine_identity_revoked")
+	}
+	claimsBytes, err := decodeRaw(parts[1])
+	if err != nil {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	var claims Claims
+	if err = decodeClosed(claimsBytes, &claims); err != nil || !validClaimsShape(claims) || claims.Issuer != record.Principal || claims.Subject != record.Principal {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	now := time.Now().UTC()
+	if v.Now != nil {
+		now = v.Now().UTC()
+	}
+	nowUnix := now.Unix()
+	if claims.ExpiresAt-claims.IssuedAt <= 0 || claims.ExpiresAt-claims.IssuedAt > int64(MaxLifetime/time.Second) ||
+		claims.NotBefore < claims.IssuedAt || claims.NotBefore > claims.ExpiresAt || claims.IssuedAt > nowUnix+int64(AllowedSkew/time.Second) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	if claims.NotBefore > nowUnix+int64(AllowedSkew/time.Second) || claims.ExpiresAt < nowUnix-int64(AllowedSkew/time.Second) {
+		return Claims{}, codeError("machine_token_expired")
+	}
+	if claims.Audience != audience || record.Audience != audience {
+		return Claims{}, codeError("machine_audience_denied")
+	}
+	if !slices.Contains(claims.Scopes, requiredScope) || !slices.Contains(record.Scopes, requiredScope) {
+		return Claims{}, codeError("machine_scope_denied")
+	}
+	normalizedPath, err := normalizePath(requestPath)
+	digest := sha256.Sum256(body)
+	if err != nil || claims.Method != strings.ToUpper(method) || claims.Path != normalizedPath || claims.BodySHA256 != hex.EncodeToString(digest[:]) {
+		return Claims{}, codeError("machine_token_invalid")
+	}
+	if !v.Replay.Consume(claims.Issuer, claims.TokenID, time.Unix(claims.ExpiresAt, 0).Add(AllowedSkew), now) {
+		return Claims{}, codeError("machine_token_replayed")
+	}
+	return claims, nil
+}
+
+func decodeClosed(raw []byte, target any) error {
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(target); err != nil {
+		return err
+	}
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		if err == nil {
+			return errors.New("trailing JSON value")
+		}
+		return err
+	}
+	return nil
+}
+
+func validClaimsShape(claims Claims) bool {
+	if claims.Version != Version || !principalPattern.MatchString(claims.Issuer) || claims.Subject != claims.Issuer || !validAudiences[claims.Audience] || !tokenIDPattern.MatchString(claims.TokenID) ||
+		len(claims.Scopes) == 0 || len(claims.Scopes) > 4 || !allowedMethod(claims.Method) || claims.Path == "" || len(claims.BodySHA256) != 64 {
+		return false
+	}
+	if !validScopeList(claims.Scopes) {
+		return false
+	}
+	_, err := hex.DecodeString(claims.BodySHA256)
+	return err == nil
+}
+
+func validScopeList(scopes []string) bool {
+	if len(scopes) == 0 || len(scopes) > 4 {
+		return false
+	}
+	seen := map[string]bool{}
+	for _, scope := range scopes {
+		if !validScopes[scope] || seen[scope] {
+			return false
+		}
+		seen[scope] = true
+	}
+	return true
+}
+
+func normalizePath(value string) (string, error) {
+	parsed, err := url.ParseRequestURI(value)
+	if err != nil || parsed.IsAbs() || parsed.Host != "" || parsed.RawQuery != "" || parsed.Fragment != "" || parsed.Path == "" || !strings.HasPrefix(parsed.Path, "/") || strings.Contains(parsed.Path, "\\") || strings.Contains(parsed.Path, "//") || path.Clean(parsed.Path) != parsed.Path {
+		return "", errors.New("machine request path must be a normalized absolute path without query or fragment")
+	}
+	return parsed.EscapedPath(), nil
+}
+
+func allowedMethod(method string) bool {
+	switch method {
+	case "GET", "POST", "PUT", "PATCH", "DELETE":
+		return true
+	default:
+		return false
+	}
+}
+
+func randomTokenID() (string, error) {
+	raw := make([]byte, 16)
+	if _, err := rand.Read(raw); err != nil {
+		return "", fmt.Errorf("generate machine token id: %w", err)
+	}
+	return rawBase64(raw), nil
+}
+
+func rawBase64(value []byte) string { return base64.RawURLEncoding.EncodeToString(value) }
+
+func decodeRaw(value string) ([]byte, error) {
+	return base64.RawURLEncoding.Strict().DecodeString(value)
+}

Sense/server/app/sense/integration/machine_identity/token_test.go

@@ -0,0 +1,219 @@
+package machine_identity
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+type crossLanguageVector struct {
+	PublicKey string `json:"public_key_base64url"`
+	Token     string `json:"token"`
+	Now       int64  `json:"now"`
+	Audience  string `json:"audience"`
+	Scope     string `json:"required_scope"`
+	Method    string `json:"method"`
+	Path      string `json:"path"`
+	Body      string `json:"body_base64"`
+}
+
+func testIdentity(t *testing.T) (Signer, *Registry, time.Time) {
+	t.Helper()
+	publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := time.Unix(1_800_000_000, 0).UTC()
+	registry, err := NewRegistry(KeyRecord{Principal: "yv:sense:site-a", KeyID: "sense-key-0001", PublicKey: publicKey,
+		Audience: "yovision-brain", Scopes: []string{"source-config:write"}, Enabled: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return Signer{Principal: "yv:sense:site-a", KeyID: "sense-key-0001", PrivateKey: privateKey, Now: func() time.Time { return now }}, registry, now
+}
+
+func errorCode(t *testing.T, err error) string {
+	t.Helper()
+	var coded *Error
+	if !errors.As(err, &coded) {
+		t.Fatalf("expected coded error, got %v", err)
+	}
+	return coded.Code
+}
+
+func TestMintAndVerifyRequestBoundToken(t *testing.T) {
+	signer, registry, now := testIdentity(t)
+	body := []byte(`{"revision":7}`)
+	token, err := signer.Mint("yovision-brain", []string{"source-config:write"}, "POST", "/machine/v1/source-config", body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	verifier := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return now }}
+	claims, err := verifier.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if claims.Issuer != signer.Principal || claims.Subject != signer.Principal || claims.ExpiresAt-claims.IssuedAt != 300 {
+		t.Fatalf("unexpected claims: %+v", claims)
+	}
+}
+
+func TestBearerTokenHasNoCookieOrQueryFallback(t *testing.T) {
+	if token, err := BearerToken("Bearer compact.token.value"); err != nil || token != "compact.token.value" {
+		t.Fatal(err)
+	}
+	for _, value := range []string{"", "compact.token.value", "Bearer", "Bearer one two", "Cookie compact.token.value"} {
+		if _, err := BearerToken(value); errorCode(t, err) != "machine_token_missing" {
+			t.Fatalf("accepted %q", value)
+		}
+	}
+}
+
+func TestRejectsReplayWrongAudienceScopeAndRequest(t *testing.T) {
+	signer, registry, now := testIdentity(t)
+	body := []byte(`{"revision":7}`)
+	mint := func() string {
+		token, err := signer.Mint("yovision-brain", []string{"source-config:write"}, "POST", "/machine/v1/source-config", body)
+		if err != nil {
+			t.Fatal(err)
+		}
+		return token
+	}
+	verifier := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return now }}
+	token := mint()
+	if _, err := verifier.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_token_replayed" {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(mint(), "yovision-bell", "source-config:write", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_audience_denied" {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(mint(), "yovision-brain", "events:ingest", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_scope_denied" {
+		t.Fatal(err)
+	}
+	if _, err := verifier.Verify(mint(), "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", []byte("changed")); errorCode(t, err) != "machine_token_invalid" {
+		t.Fatal(err)
+	}
+}
+
+func TestExpiryRevocationAndRotation(t *testing.T) {
+	signer, registry, now := testIdentity(t)
+	body := []byte("{}")
+	token, _ := signer.Mint("yovision-brain", []string{"source-config:write"}, "POST", "/machine/v1/source-config", body)
+	expired := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return now.Add(6 * time.Minute) }}
+	if _, err := expired.Verify(token, "yovision-brain", "source-config:write", "POST", "/machine/v1/source-config", body); errorCode(t, err) != "machine_token_expired" {
+		t.Fatal(err)
+	}
+
+	oldPublic, oldPrivate, _ := ed25519.GenerateKey(rand.Reader)
+	newPublic, newPrivate, _ := ed25519.GenerateKey(rand.Reader)
+	rotation, err := NewRegistry(
+		KeyRecord{Principal: "yv:brain:node-a", KeyID: "brain-old-0001", PublicKey: oldPublic, Audience: "yovision-sense", Scopes: []string{"runtime-status:write"}, Enabled: true},
+		KeyRecord{Principal: "yv:brain:node-a", KeyID: "brain-new-0002", PublicKey: newPublic, Audience: "yovision-sense", Scopes: []string{"runtime-status:write"}, Enabled: true},
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	oldSigner := Signer{Principal: "yv:brain:node-a", KeyID: "brain-old-0001", PrivateKey: oldPrivate, Now: func() time.Time { return now }}
+	newSigner := Signer{Principal: "yv:brain:node-a", KeyID: "brain-new-0002", PrivateKey: newPrivate, Now: func() time.Time { return now }}
+	oldToken, _ := oldSigner.Mint("yovision-sense", []string{"runtime-status:write"}, "POST", "/machine/v1/runtime-status", body)
+	newToken, _ := newSigner.Mint("yovision-sense", []string{"runtime-status:write"}, "POST", "/machine/v1/runtime-status", body)
+	verify := Verifier{Registry: rotation, Replay: NewReplayStore(), Now: func() time.Time { return now }}
+	if _, err = verify.Verify(oldToken, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", body); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = verify.Verify(newToken, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", body); err != nil {
+		t.Fatal(err)
+	}
+	if !rotation.Revoke("brain-old-0001") {
+		t.Fatal("old key was not revoked")
+	}
+	oldAfterRevoke, _ := oldSigner.Mint("yovision-sense", []string{"runtime-status:write"}, "POST", "/machine/v1/runtime-status", body)
+	if _, err = verify.Verify(oldAfterRevoke, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", body); errorCode(t, err) != "machine_identity_revoked" {
+		t.Fatal(err)
+	}
+}
+
+func TestTransportPolicyRejectsUnsafeTLS(t *testing.T) {
+	safe := TransportPolicy{TLSMinVersion: tls.VersionTLS12, VerifyCertificate: true, VerifyHostname: true,
+		ConnectTimeout: time.Second, ResponseHeaderTimeout: time.Second, RequestTimeout: 2 * time.Second, MaxRequestBytes: 1024}
+	if err := safe.Validate(); err != nil {
+		t.Fatal(err)
+	}
+	unsafe := safe
+	unsafe.VerifyHostname = false
+	if err := unsafe.Validate(); err == nil {
+		t.Fatal("unsafe hostname policy accepted")
+	}
+	unsafe = safe
+	unsafe.TLSMinVersion = tls.VersionTLS11
+	if err := unsafe.Validate(); err == nil {
+		t.Fatal("TLS 1.1 accepted")
+	}
+}
+
+func TestVerifiesCrossLanguageVector(t *testing.T) {
+	vectorPath := filepath.Join("..", "..", "..", "..", "..", "..", "contracts", "tests", "machine-identity-v1", "cross-language-vector.json")
+	raw, err := os.ReadFile(vectorPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var vector crossLanguageVector
+	if err = json.Unmarshal(raw, &vector); err != nil {
+		t.Fatal(err)
+	}
+	publicKey, err := base64.RawURLEncoding.DecodeString(vector.PublicKey)
+	if err != nil {
+		t.Fatal(err)
+	}
+	body, err := base64.StdEncoding.DecodeString(vector.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	registry, err := NewRegistry(KeyRecord{Principal: "yv:brain:vector", KeyID: "brain-vector-0001", PublicKey: ed25519.PublicKey(publicKey), Audience: vector.Audience, Scopes: []string{vector.Scope}, Enabled: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	verifier := Verifier{Registry: registry, Replay: NewReplayStore(), Now: func() time.Time { return time.Unix(vector.Now, 0) }}
+	claims, err := verifier.Verify(vector.Token, vector.Audience, vector.Scope, vector.Method, vector.Path, body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if claims.Issuer != "yv:brain:vector" {
+		t.Fatalf("unexpected issuer: %s", claims.Issuer)
+	}
+}
+
+func TestLoadsExternalPublicRegistryAndRejectsWrongAudience(t *testing.T) {
+	publicKey, _, _ := ed25519.GenerateKey(rand.Reader)
+	document := map[string]any{
+		"version": "yovision.machine-principal-registry/v1", "audience": "yovision-bell",
+		"principals": []any{map[string]any{"principal_id": "yv:sense:site-a", "enabled": true, "keys": []any{map[string]any{
+			"kid": "sense-key-0001", "public_key_base64url": base64.RawURLEncoding.EncodeToString(publicKey), "status": "active", "scopes": []string{"events:ingest"},
+		}}}},
+	}
+	raw, _ := json.Marshal(document)
+	file := filepath.Join(t.TempDir(), "principals.json")
+	if err := os.WriteFile(file, raw, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	registry, err := LoadRegistry(file, "yovision-bell")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if record, ok := registry.Lookup("sense-key-0001"); !ok || record.Principal != "yv:sense:site-a" {
+		t.Fatal("registry record missing")
+	}
+	if _, err = LoadRegistry(file, "yovision-sense"); err == nil {
+		t.Fatal("wrong registry audience accepted")
+	}
+}

Sense/server/app/sense/integration/machine_identity/transport.go

@@ -0,0 +1,39 @@
+package machine_identity
+
+import (
+	"crypto/tls"
+	"errors"
+	"net/http"
+	"time"
+)
+
+type TransportPolicy struct {
+	TLSMinVersion         uint16
+	VerifyCertificate     bool
+	VerifyHostname        bool
+	ConnectTimeout        time.Duration
+	ResponseHeaderTimeout time.Duration
+	RequestTimeout        time.Duration
+	MaxRequestBytes       int64
+}
+
+func (p TransportPolicy) Validate() error {
+	if p.TLSMinVersion < tls.VersionTLS12 || !p.VerifyCertificate || !p.VerifyHostname || p.ConnectTimeout < 100*time.Millisecond || p.ConnectTimeout > 30*time.Second ||
+		p.ResponseHeaderTimeout < 100*time.Millisecond || p.ResponseHeaderTimeout > 30*time.Second || p.RequestTimeout < 100*time.Millisecond || p.RequestTimeout > 60*time.Second ||
+		p.MaxRequestBytes < 1 || p.MaxRequestBytes > 10*1024*1024 {
+		return errors.New("machine transport policy is unsafe")
+	}
+	return nil
+}
+
+func (p TransportPolicy) HTTPClient() (*http.Client, error) {
+	if err := p.Validate(); err != nil {
+		return nil, err
+	}
+	transport := &http.Transport{
+		TLSClientConfig:       &tls.Config{MinVersion: p.TLSMinVersion},
+		TLSHandshakeTimeout:   p.ConnectTimeout,
+		ResponseHeaderTimeout: p.ResponseHeaderTimeout,
+	}
+	return &http.Client{Transport: transport, Timeout: p.RequestTimeout}, nil
+}

Sense/server/app/sense/local_event/outbox.go

@@ -8,12 +8,12 @@ import (
 
 	"gorm.io/gorm"
 
-	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/outbox"
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
 )
 
 // CreateWithOutbox commits the local candidate and its internal delivery
-// record atomically. The payload remains Sense-internal and is not a Bell or
-// Brain contract.
+// record atomically. The payload is the frozen anonymous event contract; it
+// never carries the candidate's internal evidence path or delivery attempts.
 func CreateWithOutbox(ctx context.Context, db *gorm.DB, candidate EventCandidate, payload map[string]interface{}, now time.Time) error {
 	encoded, err := json.Marshal(payload)
 	if err != nil {
@@ -23,7 +23,7 @@ func CreateWithOutbox(ctx context.Context, db *gorm.DB, candidate EventCandidate
 		if err := tx.Create(&candidate).Error; err != nil {
 			return fmt.Errorf("create local event candidate: %w", err)
 		}
-		_, err = outbox.Enqueue(tx, outbox.EnqueueInput{InternalType: "local_event_candidate", BusinessRef: candidate.ID, IdempotencyKey: "local-event:" + candidate.ID + ":v1", PayloadJSON: encoded}, now)
+		_, err = bell_connector.EnqueueEvent(tx, encoded, now)
 		return err
 	})
 }

Sense/server/app/sense/local_event/outbox_test.go

@@ -2,6 +2,9 @@ package local_event
 
 import (
 	"context"
+	"encoding/json"
+	"os"
+	"path/filepath"
 	"testing"
 	"time"
 
@@ -9,6 +12,7 @@ import (
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
 	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/outbox"
 )
 
@@ -24,7 +28,18 @@ func TestCreateWithOutboxCommitsAndRollsBackAtomically(t *testing.T) {
 	}
 	now := time.Date(2026, 8, 28, 10, 0, 0, 0, time.UTC)
 	candidate := EventCandidate{ID: uuid.NewString(), OccurredAt: now, SourceRef: "SEN-CAM-01", RuleRef: "rule-1", RuleName: "区域闯入", CandidateState: CandidateStateCandidate, EvidenceState: EvidenceStatePending, RetainUntil: now.Add(24 * time.Hour)}
-	if err = CreateWithOutbox(context.Background(), db, candidate, map[string]interface{}{"eventId": candidate.ID}, now); err != nil {
+	fixturePath := filepath.Join("..", "..", "..", "..", "..", "contracts", "events", "v1", "examples", "dangerous-area.json")
+	fixture, err := os.ReadFile(fixturePath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var payload map[string]interface{}
+	if err = json.Unmarshal(fixture, &payload); err != nil {
+		t.Fatal(err)
+	}
+	payload["producer_id"] = "sense-local"
+	payload["source_event_id"] = candidate.ID
+	if err = CreateWithOutbox(context.Background(), db, candidate, payload, now); err != nil {
 		t.Fatal(err)
 	}
 	var candidates, messages int64
@@ -33,9 +48,13 @@ func TestCreateWithOutboxCommitsAndRollsBackAtomically(t *testing.T) {
 	if candidates != 1 || messages != 1 {
 		t.Fatalf("candidates=%d messages=%d", candidates, messages)
 	}
+	var message outbox.Message
+	if err = db.First(&message).Error; err != nil || message.InternalType != bell_connector.OutboxType {
+		t.Fatalf("local event did not enqueue Bell contract delivery: type=%s err=%v", message.InternalType, err)
+	}
 	duplicate := candidate
 	duplicate.ID = candidate.ID
-	if err = CreateWithOutbox(context.Background(), db, duplicate, map[string]interface{}{"eventId": duplicate.ID}, now); err == nil {
+	if err = CreateWithOutbox(context.Background(), db, duplicate, payload, now); err == nil {
 		t.Fatal("expected duplicate transaction failure")
 	}
 	db.Model(&EventCandidate{}).Count(&candidates)

Sense/server/cmd/api/bell_connector_test.go

@@ -0,0 +1,119 @@
+package api
+
+import (
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-admin-team/go-admin-core/sdk"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/outbox"
+)
+
+func TestBellConnectorRuntimeWiringIsOptionalAndMigrationGated(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	db, err := gorm.Open(sqlite.Open("file:sense-api-bell-connector?mode=memory&cache=shared"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	engine := gin.New()
+	disabled := func(string) string { return "" }
+	if err = startBellConnectorRuntime(context.Background(), engine, db, disabled); err != nil {
+		t.Fatalf("disabled connector prevented Sense startup: %v", err)
+	}
+	if len(engine.Routes()) != 0 {
+		t.Fatalf("disabled connector registered routes: %#v", engine.Routes())
+	}
+	enabled := func(key string) string {
+		if key == "SENSE_EVENT_INGRESS_ENABLED" {
+			return "true"
+		}
+		return ""
+	}
+	if err = startBellConnectorRuntime(context.Background(), gin.New(), db, enabled); err == nil {
+		t.Fatal("enabled connector started without its formal migration")
+	}
+
+	if err = db.AutoMigrate(
+		&bell_connector.InboundEvent{}, &bell_connector.EvidenceRecord{}, &bell_connector.ReplayToken{},
+		&outbox.Message{}, &outbox.DeliveryRecord{}, &outbox.Attempt{},
+	); err != nil {
+		t.Fatal(err)
+	}
+	registryPath := writeSenseRegistry(t)
+	runtimeEnvironment := func(key string) string {
+		switch key {
+		case "SENSE_EVENT_INGRESS_ENABLED":
+			return "true"
+		case "SENSE_MACHINE_PRINCIPAL_REGISTRY":
+			return registryPath
+		default:
+			return ""
+		}
+	}
+	registered := gin.New()
+	if err = startBellConnectorRuntime(context.Background(), registered, db, runtimeEnvironment); err != nil {
+		t.Fatalf("enabled connector did not register after migration: %v", err)
+	}
+	routes := registered.Routes()
+	if len(routes) != 2 || routes[0].Path != "/v1/events" || routes[1].Path != "/v1/evidence/:evidence_id" {
+		t.Fatalf("unexpected connector routes: %#v", routes)
+	}
+}
+
+func TestConnectorRuntimeUsesOnlyTheExplicitDefaultDatabase(t *testing.T) {
+	defaultDB, err := gorm.Open(sqlite.Open("file:sense-default-runtime?mode=memory&cache=shared"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	secondaryDB, err := gorm.Open(sqlite.Open("file:sense-secondary-runtime?mode=memory&cache=shared"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	sdk.Runtime.SetDb("", defaultDB)
+	sdk.Runtime.SetDb("analytics", secondaryDB)
+	t.Cleanup(func() {
+		sdk.Runtime.SetDb("", nil)
+		sdk.Runtime.SetDb("analytics", nil)
+	})
+	if selected := defaultRuntimeDatabase(); selected != defaultDB {
+		t.Fatalf("runtime selected a non-default database: %p", selected)
+	}
+}
+
+func writeSenseRegistry(t *testing.T) string {
+	t.Helper()
+	publicKey, _, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatal(err)
+	}
+	document := map[string]any{
+		"version":  "yovision.machine-principal-registry/v1",
+		"audience": "yovision-sense",
+		"principals": []any{map[string]any{
+			"principal_id": "yv:brain:school-a", "enabled": true,
+			"keys": []any{map[string]any{
+				"kid": "brain-key-0001", "public_key_base64url": base64.RawURLEncoding.EncodeToString(publicKey),
+				"status": "active", "scopes": []string{"events:ingest"},
+			}},
+		}},
+	}
+	encoded, err := json.Marshal(document)
+	if err != nil {
+		t.Fatal(err)
+	}
+	path := filepath.Join(t.TempDir(), "sense-registry.json")
+	if err = os.WriteFile(path, encoded, 0o600); err != nil {
+		t.Fatal(err)
+	}
+	return path
+}

Sense/server/cmd/api/server.go

@@ -17,9 +17,11 @@ import (
 	"github.com/go-admin-team/go-admin-core/sdk/pkg"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
+	"gorm.io/gorm"
 
 	"git.ilapage.cn/ila/yovision/Sense/server/app/admin/models"
 	"git.ilapage.cn/ila/yovision/Sense/server/app/admin/router"
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
 	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/media"
 	"git.ilapage.cn/ila/yovision/Sense/server/common/database"
 	"git.ilapage.cn/ila/yovision/Sense/server/common/global"
@@ -88,15 +90,19 @@ func run() error {
 	}
 	runtimeCtx, runtimeCancel := context.WithCancel(context.Background())
 	defer runtimeCancel()
-	var runtimeDBFound bool
-	for _, db := range sdk.Runtime.GetDb() {
-		runtimeDBFound = true
+	db := defaultRuntimeDatabase()
+	if db != nil {
+		engine, engineOK := sdk.Runtime.GetEngine().(*gin.Engine)
+		if !engineOK || engine == nil {
+			return errors.New("Sense connector runtime requires Gin engine")
+		}
+		if err := startBellConnectorRuntime(runtimeCtx, engine, db, os.Getenv); err != nil {
+			return fmt.Errorf("Bell connector runtime unavailable: %w", err)
+		}
 		if err := media.StartRuntime(runtimeCtx, db); err != nil {
 			return fmt.Errorf("MediaMTX runtime unavailable: %w", err)
 		}
-		break
-	}
-	if !runtimeDBFound {
+	} else {
 		log.Error("MediaMTX runtime unavailable: Sense database is not initialized")
 	}
 
@@ -166,6 +172,14 @@ func run() error {
 	return nil
 }
 
+func startBellConnectorRuntime(ctx context.Context, engine *gin.Engine, db *gorm.DB, getenv bell_connector.Environment) error {
+	return bell_connector.StartRuntime(ctx, engine, db, getenv)
+}
+
+func defaultRuntimeDatabase() *gorm.DB {
+	return sdk.Runtime.GetDbByKey("")
+}
+
 //var Router runtime.Router
 
 func tip() {

Sense/server/cmd/migrate/migration/version/2026083112000_bell_connector.go

@@ -0,0 +1,30 @@
+package version
+
+import (
+	"runtime"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
+	"git.ilapage.cn/ila/yovision/Sense/server/cmd/migrate/migration"
+	common "git.ilapage.cn/ila/yovision/Sense/server/common/models"
+)
+
+func init() {
+	_, fileName, _, _ := runtime.Caller(0)
+	migration.Migrate.SetVersion(migration.GetFilename(fileName), migrateSenseBellConnector)
+}
+
+func migrateSenseBellConnector(db *gorm.DB, version string) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		if err := tx.AutoMigrate(
+			&bell_connector.InboundEvent{},
+			&bell_connector.EvidenceRecord{},
+			&bell_connector.ReplayToken{},
+		); err != nil {
+			return err
+		}
+		return tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&common.Migration{Version: version}).Error
+	})
+}

Sense/server/cmd/migrate/migration/version/2026083112000_bell_connector_test.go

@@ -0,0 +1,66 @@
+package version
+
+import (
+	"testing"
+	"time"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
+	common "git.ilapage.cn/ila/yovision/Sense/server/common/models"
+)
+
+func TestSenseBellConnectorMigrationIsIdempotent(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = db.AutoMigrate(&common.Migration{}); err != nil {
+		t.Fatal(err)
+	}
+
+	const version = "2026083112000"
+	for attempt := 0; attempt < 2; attempt++ {
+		if err = migrateSenseBellConnector(db, version); err != nil {
+			t.Fatalf("migration attempt %d: %v", attempt+1, err)
+		}
+	}
+
+	for name, model := range map[string]any{
+		"inbound events":   &bell_connector.InboundEvent{},
+		"evidence records": &bell_connector.EvidenceRecord{},
+		"replay tokens":    &bell_connector.ReplayToken{},
+	} {
+		if !db.Migrator().HasTable(model) {
+			t.Fatalf("%s table missing", name)
+		}
+		var count int64
+		if err = db.Model(model).Count(&count).Error; err != nil {
+			t.Fatalf("count %s: %v", name, err)
+		}
+		if count != 0 {
+			t.Fatalf("migration inserted %d %s fixtures", count, name)
+		}
+	}
+	if !db.Migrator().HasIndex(&bell_connector.ReplayToken{}, "ExpiresAt") {
+		t.Fatal("replay expiry index missing")
+	}
+
+	now := time.Now().UTC()
+	token := bell_connector.ReplayToken{Principal: "sense", TokenID: "token-1", ExpiresAt: now.Add(time.Minute), CreatedAt: now}
+	if err = db.Create(&token).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err = db.Create(&token).Error; err == nil {
+		t.Fatal("duplicate replay token accepted")
+	}
+
+	var applied int64
+	if err = db.Model(&common.Migration{}).Where("version = ?", version).Count(&applied).Error; err != nil {
+		t.Fatal(err)
+	}
+	if applied != 1 {
+		t.Fatalf("migration records=%d, want 1", applied)
+	}
+}

Sense/tests/integration/bell_connector/connector_test.go

@@ -0,0 +1,235 @@
+package bell_connector_test
+
+import (
+	"bytes"
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/bell_connector"
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/integration/machine_identity"
+	"git.ilapage.cn/ila/yovision/Sense/server/app/sense/outbox"
+)
+
+func TestPersistentOutboxRetriesWithoutChangingOriginalIdentity(t *testing.T) {
+	db, databasePath := openDatabase(t)
+	body := fixture(t)
+	_, privateKey, _ := ed25519.GenerateKey(rand.Reader)
+	signer := machine_identity.Signer{Principal: "yv:sense:school-a", KeyID: "sense-key-0001", PrivateKey: privateKey, Now: func() time.Time { return time.Date(2026, 8, 31, 1, 0, 0, 0, time.UTC) }}
+	var attempts atomic.Int32
+	var received [][]byte
+	server := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		payload := make([]byte, request.ContentLength)
+		_, _ = request.Body.Read(payload)
+		received = append(received, payload)
+		requestID := request.Header.Get("X-Request-ID")
+		writer.Header().Set("X-Request-ID", requestID)
+		if request.Header.Get("X-YoVision-Relay-ID") != "sense-school-a" || !strings.HasPrefix(request.Header.Get("Authorization"), "Bearer ") || len(requestID) < 16 || len(requestID) > 128 {
+			http.Error(writer, "missing relay identity", http.StatusUnauthorized)
+			return
+		}
+		if attempts.Add(1) == 1 {
+			writer.WriteHeader(http.StatusServiceUnavailable)
+			_, _ = writer.Write([]byte(`{"code":"ingest_unavailable","message":"temporarily unavailable"}`))
+			return
+		}
+		writer.Header().Set("Content-Type", "application/json")
+		writer.WriteHeader(http.StatusCreated)
+		_, _ = writer.Write([]byte(`{"event_id":"bell-event-1","producer_id":"brain-school-a","source_event_id":"evt-area-20260831-0001","disposition":"created","payload_sha256":"4cc1e93820195caf713ea675ff33f178c9d4997dd8a81cb61287e9fea0e3d5e1"}`))
+	}))
+	defer server.Close()
+
+	now := time.Date(2026, 8, 31, 1, 0, 0, 0, time.UTC)
+	if _, err := bell_connector.EnqueueEvent(db, body, now); err != nil {
+		t.Fatal(err)
+	}
+	client := &bell_connector.Client{Endpoint: server.URL, RelayID: "sense-school-a", Signer: signer, HTTP: server.Client(), Enabled: true}
+	relay := bell_connector.Relay{DB: db, Client: client, Now: func() time.Time { return now }, Backoff: func(int) time.Duration { return 0 }}
+	if delivered, err := relay.DeliverBatch(context.Background(), "worker-1", 10); err != nil || delivered != 0 {
+		t.Fatalf("unavailable delivery=%d err=%v", delivered, err)
+	}
+	var queued outbox.Message
+	if err := db.First(&queued).Error; err != nil || queued.State != outbox.StateRetry {
+		t.Fatalf("outbox was not retained for retry: state=%s err=%v", queued.State, err)
+	}
+	sqlDatabase, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = sqlDatabase.Close(); err != nil {
+		t.Fatal(err)
+	}
+	db = openDatabasePath(t, databasePath)
+	if err = db.First(&queued).Error; err != nil {
+		t.Fatal(err)
+	}
+
+	// Constructing a new relay simulates restart; the durable row is claimed
+	// and delivered with its original bytes and business identity.
+	restarted := bell_connector.Relay{DB: db, Client: client, Now: func() time.Time { return now }, Backoff: func(int) time.Duration { return 0 }}
+	if delivered, err := restarted.DeliverBatch(context.Background(), "worker-2", 10); err != nil || delivered != 1 {
+		t.Fatalf("recovery delivery=%d err=%v", delivered, err)
+	}
+	if len(received) != 2 || string(received[0]) != string(body) || string(received[1]) != string(body) || bell_connector.PreserveIdentity(received[0], received[1]) != nil {
+		t.Fatal("relay changed the frozen payload or original identity")
+	}
+	if err := db.First(&queued).Error; err != nil || queued.State != outbox.StateDelivered {
+		t.Fatalf("outbox not delivered: state=%s err=%v", queued.State, err)
+	}
+}
+
+func TestTerminalConflictDisabledTimeoutAndReplayRestart(t *testing.T) {
+	db, databasePath := openDatabase(t)
+	body := fixture(t)
+	_, privateKey, _ := ed25519.GenerateKey(rand.Reader)
+	signer := machine_identity.Signer{Principal: "yv:sense:school-a", KeyID: "sense-key-0001", PrivateKey: privateKey}
+	policy := machine_identity.TransportPolicy{TLSMinVersion: tls.VersionTLS12, VerifyCertificate: true, VerifyHostname: true, ConnectTimeout: time.Second, ResponseHeaderTimeout: time.Second, RequestTimeout: time.Second, MaxRequestBytes: 64 * 1024}
+	if _, err := bell_connector.NewClient("https://user:pass@bell.example", "sense-school-a", signer, policy); err == nil || !strings.Contains(err.Error(), "HTTPS origin") {
+		t.Fatalf("endpoint userinfo was not rejected: %v", err)
+	}
+	conflictServer := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		writer.WriteHeader(http.StatusConflict)
+		_, _ = writer.Write([]byte(`{"code":"idempotency_conflict","message":"conflict","existing_event_id":"bell-1"}`))
+	}))
+	defer conflictServer.Close()
+	if _, err := bell_connector.EnqueueEvent(db, body, time.Now()); err != nil {
+		t.Fatal(err)
+	}
+	client := &bell_connector.Client{Endpoint: conflictServer.URL, Signer: signer, HTTP: conflictServer.Client(), Enabled: true}
+	if _, err := (bell_connector.Relay{DB: db, Client: client}).DeliverBatch(context.Background(), "worker", 1); err != nil {
+		t.Fatal(err)
+	}
+	var message outbox.Message
+	if err := db.First(&message).Error; err != nil || message.State != outbox.StateDead {
+		t.Fatalf("terminal conflict was retried: state=%s err=%v", message.State, err)
+	}
+	if _, err := (bell_connector.Client{Enabled: false}).Send(context.Background(), body); err == nil || !strings.Contains(err.Error(), "connector_disabled") {
+		t.Fatalf("disabled connector error=%v", err)
+	}
+	cancelled, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := client.Send(cancelled, body); err == nil {
+		t.Fatal("cancelled/timeout request unexpectedly succeeded")
+	}
+
+	now := time.Now().UTC()
+	firstStore := bell_connector.PersistentReplayStore{DB: db}
+	if !firstStore.Consume("yv:bell:school-a", "abcdefghijklmnopqrstuv", now.Add(time.Minute), now) {
+		t.Fatal("first replay consume failed")
+	}
+	sqlDatabase, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = sqlDatabase.Close(); err != nil {
+		t.Fatal(err)
+	}
+	db = openDatabasePath(t, databasePath)
+	restartedStore := bell_connector.PersistentReplayStore{DB: db}
+	if restartedStore.Consume("yv:bell:school-a", "abcdefghijklmnopqrstuv", now.Add(time.Minute), now) {
+		t.Fatal("replay was accepted after store restart")
+	}
+}
+
+func TestBrainIngressAndBellEvidenceEndpoint(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	db, _ := openDatabase(t)
+	brainPublic, brainPrivate, _ := ed25519.GenerateKey(rand.Reader)
+	bellPublic, bellPrivate, _ := ed25519.GenerateKey(rand.Reader)
+	registry, err := machine_identity.NewRegistry(
+		machine_identity.KeyRecord{Principal: "yv:brain:school-a", KeyID: "brain-key-0001", PublicKey: brainPublic, Audience: "yovision-sense", Scopes: []string{"events:ingest"}, Enabled: true},
+		machine_identity.KeyRecord{Principal: "yv:bell:school-a", KeyID: "bell-key-0001", PublicKey: bellPublic, Audience: "yovision-sense", Scopes: []string{"evidence:read"}, Enabled: true},
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := time.Date(2026, 8, 31, 1, 0, 0, 0, time.UTC)
+	verifier := machine_identity.Verifier{Registry: registry, Replay: bell_connector.PersistentReplayStore{DB: db}, Now: func() time.Time { return now }}
+	body := fixture(t)
+	brainSigner := machine_identity.Signer{Principal: "yv:brain:school-a", KeyID: "brain-key-0001", PrivateKey: brainPrivate, Now: func() time.Time { return now }}
+	token, err := brainSigner.Mint("yovision-sense", []string{"events:ingest"}, http.MethodPost, "/v1/events", body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	request := httptest.NewRequest(http.MethodPost, "/v1/events", bytes.NewReader(body))
+	request.Header.Set("Authorization", "Bearer "+token)
+	request.Header.Set("X-Request-ID", "request-id-0000001")
+	response := httptest.NewRecorder()
+	ginContext, _ := gin.CreateTestContext(response)
+	ginContext.Request = request
+	(bell_connector.IngressHandler{DB: db, Verifier: verifier, EvidenceOwnerID: "sense-school-a", Now: func() time.Time { return now }}).Post(ginContext)
+	if response.Code != http.StatusAccepted {
+		t.Fatalf("Brain ingress status=%d body=%s", response.Code, response.Body.String())
+	}
+	var evidence bell_connector.EvidenceRecord
+	if err = db.First(&evidence, "evidence_id = ?", "ev-school-east-0001").Error; err != nil {
+		t.Fatal(err)
+	}
+	bellSigner := machine_identity.Signer{Principal: "yv:bell:school-a", KeyID: "bell-key-0001", PrivateKey: bellPrivate, Now: func() time.Time { return now }}
+	path := "/v1/evidence/ev-school-east-0001"
+	token, err = bellSigner.Mint("yovision-sense", []string{"evidence:read"}, http.MethodGet, path, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	getRequest := httptest.NewRequest(http.MethodGet, path, nil)
+	getRequest.Header.Set("Authorization", "Bearer "+token)
+	getRequest.Header.Set("X-Request-ID", "request-id-0000002")
+	getResponse := httptest.NewRecorder()
+	getContext, _ := gin.CreateTestContext(getResponse)
+	getContext.Request = getRequest
+	getContext.Params = gin.Params{{Key: "evidence_id", Value: "ev-school-east-0001"}}
+	(bell_connector.EvidenceHandler{DB: db, Verifier: verifier, Now: func() time.Time { return now }}).Get(getContext)
+	if getResponse.Code != http.StatusOK || !bytes.Equal(getResponse.Body.Bytes(), evidence.Payload) {
+		t.Fatalf("evidence lookup status=%d body=%s", getResponse.Code, getResponse.Body.String())
+	}
+}
+
+func openDatabase(t *testing.T) (*gorm.DB, string) {
+	databasePath := filepath.Join(t.TempDir(), "sense-bell-connector.sqlite")
+	return openDatabasePath(t, databasePath), databasePath
+}
+
+func openDatabasePath(t *testing.T, databasePath string) *gorm.DB {
+	t.Helper()
+	db, err := gorm.Open(sqlite.Open(databasePath), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = db.AutoMigrate(&outbox.Message{}, &outbox.DeliveryRecord{}, &outbox.Attempt{}, &bell_connector.ReplayToken{}, &bell_connector.InboundEvent{}, &bell_connector.EvidenceRecord{}); err != nil {
+		t.Fatal(err)
+	}
+	sqlDatabase, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = sqlDatabase.Close() })
+	return db
+}
+
+func fixture(t *testing.T) []byte {
+	t.Helper()
+	path := filepath.Join("..", "..", "..", "..", "contracts", "events", "v1", "examples", "dangerous-area.json")
+	body, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var event map[string]any
+	if json.Unmarshal(body, &event) != nil {
+		t.Fatal("invalid fixture")
+	}
+	return body
+}

Sense/tests/integration/bell_connector/go.mod

@@ -0,0 +1,72 @@
+module git.ilapage.cn/ila/yovision/Sense/tests/integration/bell_connector
+
+go 1.26.5
+
+require (
+	git.ilapage.cn/ila/yovision/Sense/server v0.0.0
+	gorm.io/driver/sqlite v1.6.0
+	gorm.io/gorm v1.31.2
+)
+
+require (
+	dario.cat/mergo v1.0.1 // indirect
+	github.com/BurntSushi/toml v1.5.0 // indirect
+	github.com/andeya/ameda v1.5.3 // indirect
+	github.com/andeya/goutil v1.1.2 // indirect
+	github.com/bitly/go-simplejson v0.5.1 // indirect
+	github.com/bmatcuk/doublestar/v4 v4.10.0 // indirect
+	github.com/bytedance/go-tagexpr/v2 v2.9.11 // indirect
+	github.com/bytedance/gopkg v0.1.4 // indirect
+	github.com/bytedance/sonic v1.15.2 // indirect
+	github.com/bytedance/sonic/loader v0.5.2 // indirect
+	github.com/casbin/casbin/v2 v2.135.0 // indirect
+	github.com/casbin/govaluate v1.10.0 // indirect
+	github.com/chanxuehong/rand v0.0.0-20211009035549-2f07823e8e99 // indirect
+	github.com/chanxuehong/wechat v0.0.0-20230222024006-36f0325263cd // indirect
+	github.com/cloudwego/base64x v0.1.7 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.15 // indirect
+	github.com/ghodss/yaml v1.0.0 // indirect
+	github.com/gin-contrib/sse v1.1.1 // indirect
+	github.com/gin-gonic/gin v1.12.0 // indirect
+	github.com/go-admin-team/go-admin-core v1.5.3-rc.3.0.20250408121721-2763de5dcdf4 // indirect
+	github.com/go-admin-team/go-admin-core/plugins/logger/zap v1.5.2 // indirect
+	github.com/go-admin-team/go-admin-core/sdk v1.5.3-rc.3.0.20250408121721-2763de5dcdf4 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.30.3 // indirect
+	github.com/goccy/go-json v0.10.6 // indirect
+	github.com/goccy/go-yaml v1.19.2 // indirect
+	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.4.0 // indirect
+	github.com/leodido/go-urn v1.5.0 // indirect
+	github.com/mattn/go-isatty v0.0.24 // indirect
+	github.com/mattn/go-sqlite3 v1.14.49 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/nyaruka/phonenumbers v1.2.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.4.3 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/quic-go/qpack v0.6.0 // indirect
+	github.com/quic-go/quic-go v0.61.0 // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.2 // indirect
+	go.mongodb.org/mongo-driver/v2 v2.8.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.27.0 // indirect
+	golang.org/x/arch v0.30.0 // indirect
+	golang.org/x/crypto v0.54.0 // indirect
+	golang.org/x/net v0.57.0 // indirect
+	golang.org/x/sys v0.47.0 // indirect
+	golang.org/x/text v0.40.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)
+
+replace git.ilapage.cn/ila/yovision/Sense/server => ../../../server

Sense/tests/integration/bell_connector/go.sum

@@ -0,0 +1,204 @@
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contracts/machine-identity/v1/README.md

@@ -0,0 +1,62 @@
+# Machine identity contract v1
+
+`yovision.machine-identity/v1` defines service-to-service identity for YoVision connectors. It is deliberately separate from Sense and Bell users, GoAdmin JWT/Cookie state, database roles and operating-system accounts.
+
+## Authentication mechanism
+
+Every request uses HTTPS and one compact Ed25519 JWS in `Authorization: Bearer <token>`. The protected header is closed and contains `alg=EdDSA`, `typ=YOVISION-MACHINE+JWT`, `kid` and `ver=yovision.machine-identity/v1`. The closed claims object contains:
+
+mTLS is not the primary v1 identity mechanism. A customer PKI may add mTLS later as transport hardening, but it cannot replace or weaken the v1 principal, audience, scope, request binding, replay and revocation checks.
+
+- one instance-specific `iss`/`sub` principal;
+- one exact service `aud`;
+- the minimum required `scope` values;
+- `iat`, `nbf`, `exp` and a single-use random `jti`;
+- uppercase HTTP method `htm`, normalized absolute-path reference `htu`, and lowercase SHA-256 `body_sha256`.
+
+Tokens live for at most 300 seconds. Consumers allow at most 30 seconds of clock skew, verify the signature and active key/principal before authorization, then atomically consume `jti` until `exp + skew`. Retrying transport creates a new token and `jti`; business idempotency keys remain unchanged.
+
+Production consumers persist the replay key `(principal, jti)` in their own durable store so a process restart cannot reopen the replay window. The checked-in process-local replay stores are adapter test/default primitives only; connector tasks must inject an atomic durable implementation and test restart behavior without sharing a database across products.
+
+The v1 scopes are:
+
+| Caller | Audience | Scope |
+|---|---|---|
+| Sense | `yovision-brain` | `source-config:write` |
+| Brain | `yovision-sense` | `runtime-status:write` |
+| Brain or Sense | `yovision-bell` | `events:ingest` |
+| Bell | `yovision-sense` | `evidence:read` |
+
+No wildcard audience or scope exists. A relay authenticates as its own transport principal and never replaces the original event producer identity.
+
+## Key lifecycle
+
+Private Ed25519 keys are generated per product instance and stored outside the repository in an OS-protected file or secret store. Runtime configuration contains only the private-key path. Public registries are local consumer configuration, not a shared database.
+
+Rotation first registers a new `kid`, switches the caller, and removes the old key after an overlap no longer than 24 hours. A disabled principal or revoked `kid` is rejected on every request, including tokens that have not expired. Emergency rollback disables the connector; it never enables a shared password, browser token, query token, plaintext transport or signature bypass.
+
+## Threat boundary
+
+v1 protects against token modification, wrong audience/scope, expired or premature tokens, captured-token replay, key/principal revocation and accidental credential mixing. It does not protect a host after administrator/root compromise, a stolen usable private key before revocation, compromised TLS trust roots, endpoint implementation flaws or denial of service. Rate and body-size limits remain consumer responsibilities.
+
+See `../transport/v1/README.md` for HTTPS and request policy. Stable failures are defined in `errors.md`; callers and logs must expose only the stable code, principal/kid when already authenticated, and correlation ID—never the token, signature, private/public key material or complete Authorization header.
+
+## Compatibility
+
+v1 is closed. New optional claims require all consumers to accept them before producers emit them. Any change to signing input, algorithm, claim meaning, replay semantics, maximum lifetime, audience or scope meaning publishes a new major version. Consumers keep the last accepted major during a controlled migration; rollback disables the new producer version without weakening verification.
+
+## Reproducible verification
+
+From the repository root:
+
+```powershell
+pwsh -NoProfile -File contracts/tests/machine-identity-v1/run.ps1
+
+cd Sense/server
+go test -race ./app/sense/integration/machine_identity
+
+cd ../../Bell/server
+go test -race ./app/bell/integration/machine_identity
+```
+
+The isolated contract test validates both JSON Schemas, the fixed Go/Python Ed25519 vector, request binding, exact audience/scope, expiry, replay, rotation overlap, revocation, bearer-only extraction and verified TLS policy. Product connector tasks remain responsible for injecting a durable replay store and testing restart recovery.

contracts/machine-identity/v1/errors.md

@@ -0,0 +1,14 @@
+# Machine identity v1 stable errors
+
+| Code | Meaning | Retry |
+|---|---|---|
+| `machine_token_missing` | Authorization bearer token is absent or malformed | No, fix request |
+| `machine_token_invalid` | Header, claims, signature, request binding or key is invalid | No |
+| `machine_token_expired` | Token is outside its accepted time window | Mint a new token |
+| `machine_audience_denied` | Exact audience does not match | No |
+| `machine_scope_denied` | Required scope is absent or not granted to the key | No |
+| `machine_identity_revoked` | Principal or key is disabled/revoked | No; operator action |
+| `machine_token_replayed` | The same principal/jti was already accepted | Retry with a new token and the same business idempotency key |
+| `machine_transport_required` | HTTPS policy is not satisfied | No; fix deployment |
+
+Responses and audit facts never include the token, signature, key material or Authorization header.

contracts/machine-identity/v1/machine-token.schema.json

@@ -0,0 +1,28 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://yovision.local/contracts/machine-identity/v1/machine-token.schema.json",
+  "title": "YoVision machine token claims v1",
+  "type": "object",
+  "additionalProperties": false,
+  "required": ["ver", "iss", "sub", "aud", "scope", "iat", "nbf", "exp", "jti", "htm", "htu", "body_sha256"],
+  "properties": {
+    "ver": {"const": "yovision.machine-identity/v1"},
+    "iss": {"type": "string", "pattern": "^yv:(sense|brain|bell):[a-z0-9][a-z0-9.-]{0,62}$"},
+    "sub": {"type": "string", "pattern": "^yv:(sense|brain|bell):[a-z0-9][a-z0-9.-]{0,62}$"},
+    "aud": {"enum": ["yovision-sense", "yovision-brain", "yovision-bell"]},
+    "scope": {
+      "type": "array",
+      "minItems": 1,
+      "maxItems": 4,
+      "uniqueItems": true,
+      "items": {"enum": ["source-config:write", "runtime-status:write", "events:ingest", "evidence:read"]}
+    },
+    "iat": {"type": "integer", "minimum": 0},
+    "nbf": {"type": "integer", "minimum": 0},
+    "exp": {"type": "integer", "minimum": 0},
+    "jti": {"type": "string", "pattern": "^[A-Za-z0-9_-]{22,64}$"},
+    "htm": {"type": "string", "pattern": "^(GET|POST|PUT|PATCH|DELETE)$"},
+    "htu": {"type": "string", "pattern": "^/[A-Za-z0-9._~!$&'()*+,;=:@%/-]*$"},
+    "body_sha256": {"type": "string", "pattern": "^[a-f0-9]{64}$"}
+  }
+}

contracts/machine-identity/v1/principal-registry.schema.json

@@ -0,0 +1,38 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://yovision.local/contracts/machine-identity/v1/principal-registry.schema.json",
+  "title": "YoVision machine principal registry v1",
+  "type": "object",
+  "additionalProperties": false,
+  "required": ["version", "audience", "principals"],
+  "properties": {
+    "version": {"const": "yovision.machine-principal-registry/v1"},
+    "audience": {"enum": ["yovision-sense", "yovision-brain", "yovision-bell"]},
+    "principals": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "additionalProperties": false,
+        "required": ["principal_id", "enabled", "keys"],
+        "properties": {
+          "principal_id": {"type": "string", "pattern": "^yv:(sense|brain|bell):[a-z0-9][a-z0-9.-]{0,62}$"},
+          "enabled": {"type": "boolean"},
+          "keys": {
+            "type": "array",
+            "items": {
+              "type": "object",
+              "additionalProperties": false,
+              "required": ["kid", "public_key_base64url", "status", "scopes"],
+              "properties": {
+                "kid": {"type": "string", "pattern": "^[A-Za-z0-9._-]{8,64}$"},
+                "public_key_base64url": {"type": "string", "pattern": "^[A-Za-z0-9_-]{43}$"},
+                "status": {"enum": ["active", "revoked"]},
+                "scopes": {"type": "array", "minItems": 1, "maxItems": 4, "uniqueItems": true, "items": {"enum": ["source-config:write", "runtime-status:write", "events:ingest", "evidence:read"]}}
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}

contracts/tests/machine-identity-v1/cross-language-vector.json

@@ -0,0 +1,11 @@
+{
+  "version": "yovision.machine-token-vector/v1",
+  "public_key_base64url": "ebVWLo_mVPlAeLES6KmLp5AfhTrmlb7X4OORC60ElmQ",
+  "token": "eyJhbGciOiJFZERTQSIsImtpZCI6ImJyYWluLXZlY3Rvci0wMDAxIiwidHlwIjoiWU9WSVNJT04tTUFDSElORStKV1QiLCJ2ZXIiOiJ5b3Zpc2lvbi5tYWNoaW5lLWlkZW50aXR5L3YxIn0.eyJhdWQiOiJ5b3Zpc2lvbi1zZW5zZSIsImJvZHlfc2hhMjU2IjoiNDA5NDQzYTZlZTVhYTI5NmRjY2Q2YzBkMTkzZTIxNDU2OGRhYTAwNTNiNjYxNTVmYmE4YWRjYTk5NWI3ODIzZCIsImV4cCI6MTgwMDAwMDMwMCwiaHRtIjoiUE9TVCIsImh0dSI6Ii9tYWNoaW5lL3YxL3J1bnRpbWUtc3RhdHVzIiwiaWF0IjoxODAwMDAwMDAwLCJpc3MiOiJ5djpicmFpbjp2ZWN0b3IiLCJqdGkiOiJBUUlEQkFVR0J3Z0pDZ3NNRFE0UEVBIiwibmJmIjoxODAwMDAwMDAwLCJzY29wZSI6WyJydW50aW1lLXN0YXR1czp3cml0ZSJdLCJzdWIiOiJ5djpicmFpbjp2ZWN0b3IiLCJ2ZXIiOiJ5b3Zpc2lvbi5tYWNoaW5lLWlkZW50aXR5L3YxIn0.zrvo_7lRiDX1D6po6OlfQg4hDg6XXlyUEmNMYgpuRl3ArXSjvGuOLivDousIyLtRO4bYJu9xMAWX1cea7MdVBQ",
+  "now": 1800000000,
+  "audience": "yovision-sense",
+  "required_scope": "runtime-status:write",
+  "method": "POST",
+  "path": "/machine/v1/runtime-status",
+  "body_base64": "eyJzdGF0dXMiOiJydW5uaW5nIn0="
+}

contracts/tests/machine-identity-v1/requirements.txt

@@ -0,0 +1,2 @@
+cryptography==50.0.1
+jsonschema==4.25.1

contracts/tests/machine-identity-v1/run.ps1

@@ -0,0 +1,33 @@
+[CmdletBinding()]
+param()
+
+$ErrorActionPreference = 'Stop'
+$testDirectory = $PSScriptRoot
+$requirements = Join-Path $testDirectory 'requirements.txt'
+$tempRoot = [IO.Path]::GetFullPath([IO.Path]::GetTempPath())
+$workDirectory = Join-Path $tempRoot ("yovision-machine-identity-v1-{0}" -f [Guid]::NewGuid().ToString('N'))
+
+try {
+    New-Item -ItemType Directory -Path $workDirectory | Out-Null
+    $virtualEnvironment = Join-Path $workDirectory '.venv'
+    python -m venv $virtualEnvironment
+    if ($LASTEXITCODE -ne 0) { throw 'Failed to create the isolated Python environment.' }
+
+    $python = Join-Path $virtualEnvironment 'Scripts\python.exe'
+    $env:PIP_DISABLE_PIP_VERSION_CHECK = '1'
+    $env:PYTHONDONTWRITEBYTECODE = '1'
+    & $python -m pip install --quiet --requirement $requirements
+    if ($LASTEXITCODE -ne 0) { throw 'Failed to install pinned machine-identity test dependencies.' }
+
+    & $python $testDirectory\test_contract.py
+    if ($LASTEXITCODE -ne 0) { throw 'Machine-identity v1 contract tests failed.' }
+}
+finally {
+    $resolvedWorkDirectory = [IO.Path]::GetFullPath($workDirectory)
+    if (-not $resolvedWorkDirectory.StartsWith($tempRoot, [StringComparison]::OrdinalIgnoreCase)) {
+        throw "Refusing to remove a temporary directory outside $tempRoot"
+    }
+    if (Test-Path -LiteralPath $resolvedWorkDirectory) {
+        Remove-Item -LiteralPath $resolvedWorkDirectory -Recurse -Force
+    }
+}

contracts/tests/machine-identity-v1/test_contract.py

@@ -0,0 +1,181 @@
+from __future__ import annotations
+
+import json
+import base64
+import ssl
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[3]
+sys.path.insert(0, str(ROOT / "Brain" / "src"))
+
+from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
+from jsonschema import Draft202012Validator
+
+from yovision_brain.integration.machine_identity import (
+    KeyRecord,
+    MachineIdentityError,
+    Registry,
+    ReplayStore,
+    Signer,
+    TransportPolicy,
+    Verifier,
+    load_registry,
+    bearer_token,
+)
+
+
+class ContractFilesTest(unittest.TestCase):
+    def test_closed_claim_and_registry_schemas(self) -> None:
+        claims = json.loads((ROOT / "contracts/machine-identity/v1/machine-token.schema.json").read_text(encoding="utf-8"))
+        registry = json.loads((ROOT / "contracts/machine-identity/v1/principal-registry.schema.json").read_text(encoding="utf-8"))
+        transport = json.loads((ROOT / "contracts/transport/v1/transport-policy.schema.json").read_text(encoding="utf-8"))
+        Draft202012Validator.check_schema(claims)
+        Draft202012Validator.check_schema(registry)
+        Draft202012Validator.check_schema(transport)
+        self.assertFalse(claims["additionalProperties"])
+        self.assertEqual(claims["properties"]["ver"]["const"], "yovision.machine-identity/v1")
+        self.assertEqual(claims["properties"]["scope"]["items"]["enum"], [
+            "source-config:write", "runtime-status:write", "events:ingest", "evidence:read"
+        ])
+        self.assertFalse(registry["additionalProperties"])
+        self.assertEqual(transport["properties"]["verify_certificate"]["const"], True)
+        self.assertEqual(transport["properties"]["verify_hostname"]["const"], True)
+
+        vector = json.loads((ROOT / "contracts/tests/machine-identity-v1/cross-language-vector.json").read_text(encoding="utf-8"))
+        claims_object = json.loads(base64.urlsafe_b64decode(vector["token"].split(".")[1] + "=="))
+        Draft202012Validator(claims).validate(claims_object)
+        Draft202012Validator(transport).validate({
+            "version": "yovision.transport/v1", "tls_min_version": "1.2", "verify_certificate": True,
+            "verify_hostname": True, "connect_timeout_ms": 1000, "response_header_timeout_ms": 1000,
+            "request_timeout_ms": 5000, "max_request_bytes": 1048576,
+        })
+
+    def test_brain_dependency_is_frozen(self) -> None:
+        pyproject = (ROOT / "Brain/pyproject.toml").read_text(encoding="utf-8")
+        self.assertIn('dependencies = ["cryptography==50.0.1"]', pyproject)
+
+    def test_contract_documents_fail_closed(self) -> None:
+        identity = (ROOT / "contracts/machine-identity/v1/README.md").read_text(encoding="utf-8")
+        transport = (ROOT / "contracts/transport/v1/README.md").read_text(encoding="utf-8")
+        for required in ("300 seconds", "30 seconds", "24 hours", "jti", "revoked", "browser token"):
+            self.assertIn(required, identity)
+        for required in ("TLS 1.2", "hostname verification", "query-string credentials", "disables the connector"):
+            self.assertIn(required, transport)
+
+    def test_python_verifies_cross_language_vector(self) -> None:
+        vector = json.loads((ROOT / "contracts/tests/machine-identity-v1/cross-language-vector.json").read_text(encoding="utf-8"))
+        raw_key = base64.urlsafe_b64decode(vector["public_key_base64url"] + "=")
+        from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PublicKey
+        registry = Registry([KeyRecord("yv:brain:vector", "brain-vector-0001", Ed25519PublicKey.from_public_bytes(raw_key), vector["audience"], frozenset({vector["required_scope"]}))])
+        verifier = Verifier(registry, ReplayStore(), clock=lambda: vector["now"])
+        claims = verifier.verify(vector["token"], vector["audience"], vector["required_scope"], vector["method"], vector["path"], base64.b64decode(vector["body_base64"]))
+        self.assertEqual(claims.iss, "yv:brain:vector")
+
+
+class BrainAdapterTest(unittest.TestCase):
+    def setUp(self) -> None:
+        self.now = 1_800_000_000
+        self.private = Ed25519PrivateKey.generate()
+        self.record = KeyRecord(
+            principal="yv:brain:node-a",
+            key_id="brain-key-0001",
+            public_key=self.private.public_key(),
+            audience="yovision-sense",
+            scopes=frozenset({"runtime-status:write"}),
+        )
+        self.registry = Registry([self.record])
+        self.signer = Signer("yv:brain:node-a", "brain-key-0001", self.private, clock=lambda: self.now)
+
+    def mint(self, body: bytes = b"{}") -> str:
+        return self.signer.mint("yovision-sense", ["runtime-status:write"], "POST", "/machine/v1/runtime-status", body)
+
+    def verify(self, token: str, body: bytes = b"{}", **changes: str):
+        verifier = Verifier(self.registry, changes.pop("replay", ReplayStore()), clock=lambda: int(changes.pop("now", self.now)))
+        return verifier.verify(
+            token,
+            changes.pop("audience", "yovision-sense"),
+            changes.pop("scope", "runtime-status:write"),
+            changes.pop("method", "POST"),
+            changes.pop("path", "/machine/v1/runtime-status"),
+            body,
+        )
+
+    def assert_code(self, code: str, callback) -> None:
+        with self.assertRaises(MachineIdentityError) as caught:
+            callback()
+        self.assertEqual(caught.exception.code, code)
+        self.assertEqual(str(caught.exception), code)
+
+    def test_valid_token_and_replay_rejection(self) -> None:
+        token = self.mint()
+        replay = ReplayStore()
+        first = Verifier(self.registry, replay, clock=lambda: self.now)
+        claims = first.verify(token, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", b"{}")
+        self.assertEqual(claims.iss, "yv:brain:node-a")
+        self.assert_code("machine_token_replayed", lambda: first.verify(token, "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", b"{}"))
+
+    def test_bearer_token_has_no_cookie_or_query_fallback(self) -> None:
+        self.assertEqual(bearer_token("Bearer compact.token.value"), "compact.token.value")
+        for value in ("", "compact.token.value", "Bearer", "Bearer one two", "Cookie compact.token.value"):
+            self.assert_code("machine_token_missing", lambda value=value: bearer_token(value))
+
+    def test_wrong_audience_scope_body_and_expiry(self) -> None:
+        self.assert_code("machine_audience_denied", lambda: self.verify(self.mint(), audience="yovision-bell"))
+        self.assert_code("machine_scope_denied", lambda: self.verify(self.mint(), scope="events:ingest"))
+        self.assert_code("machine_token_invalid", lambda: self.verify(self.mint(), body=b"changed"))
+        self.assert_code("machine_token_expired", lambda: self.verify(self.mint(), now=str(self.now + 361)))
+
+    def test_tampering_revocation_and_rotation(self) -> None:
+        token = self.mint()
+        parts = token.split(".")
+        tampered = f"{parts[0]}.{parts[1][:-1]}A.{parts[2]}"
+        self.assert_code("machine_token_invalid", lambda: self.verify(tampered))
+        self.assertTrue(self.registry.revoke("brain-key-0001"))
+        self.assert_code("machine_identity_revoked", lambda: self.verify(self.mint()))
+
+        new_private = Ed25519PrivateKey.generate()
+        overlap = Registry([
+            self.record,
+            KeyRecord("yv:brain:node-a", "brain-key-0002", new_private.public_key(), "yovision-sense", frozenset({"runtime-status:write"})),
+        ])
+        new_signer = Signer("yv:brain:node-a", "brain-key-0002", new_private, clock=lambda: self.now)
+        verifier = Verifier(overlap, ReplayStore(), clock=lambda: self.now)
+        verifier.verify(self.mint(), "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", b"{}")
+        verifier.verify(new_signer.mint("yovision-sense", ["runtime-status:write"], "POST", "/machine/v1/runtime-status", b"{}"), "yovision-sense", "runtime-status:write", "POST", "/machine/v1/runtime-status", b"{}")
+
+    def test_transport_policy_requires_verified_tls(self) -> None:
+        policy = TransportPolicy("1.2", True, True, 1000, 1000, 2000, 1024)
+        context = policy.ssl_context()
+        self.assertGreaterEqual(context.minimum_version, ssl.TLSVersion.TLSv1_2)
+        self.assertTrue(context.check_hostname)
+        self.assertEqual(context.verify_mode, ssl.CERT_REQUIRED)
+        with self.assertRaises(ValueError):
+            TransportPolicy("1.1", True, True, 1000, 1000, 2000, 1024).validate()
+        with self.assertRaises(ValueError):
+            TransportPolicy("1.2", True, False, 1000, 1000, 2000, 1024).validate()
+
+    def test_loads_external_public_registry_and_rejects_wrong_audience(self) -> None:
+        from cryptography.hazmat.primitives import serialization
+        raw_public = self.private.public_key().public_bytes(serialization.Encoding.Raw, serialization.PublicFormat.Raw)
+        document = {
+            "version": "yovision.machine-principal-registry/v1",
+            "audience": "yovision-sense",
+            "principals": [{
+                "principal_id": "yv:brain:node-a", "enabled": True,
+                "keys": [{"kid": "brain-key-0001", "public_key_base64url": base64.urlsafe_b64encode(raw_public).rstrip(b"=").decode(), "status": "active", "scopes": ["runtime-status:write"]}],
+            }],
+        }
+        with tempfile.TemporaryDirectory() as directory:
+            path = Path(directory) / "principals.json"
+            path.write_text(json.dumps(document), encoding="utf-8")
+            registry = load_registry(path, "yovision-sense")
+            self.assertIsNotNone(registry.lookup("brain-key-0001"))
+            with self.assertRaises(ValueError):
+                load_registry(path, "yovision-bell")
+
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)

contracts/transport/v1/README.md

@@ -0,0 +1,12 @@
+# Machine transport policy v1
+
+`yovision.transport/v1` applies to every connector protected by machine identity v1.
+
+- HTTPS is mandatory. TLS 1.2 is the minimum and TLS 1.3 is preferred.
+- Certificate-chain and hostname verification are mandatory. `InsecureSkipVerify`, plaintext fallback and query-string credentials are forbidden.
+- Connection, response-header and total request timeouts are explicit and bounded; consumers enforce a route-specific body limit before decoding.
+- `X-Request-ID` is an opaque 16–128 character correlation value. It may be generated by the caller or first trusted hop, is never an authentication factor, and must not contain credentials or personal data.
+- Retry only timeout, connection loss, `429` and `5xx` according to the connector policy. Authentication/authorization failures and contract `4xx` responses are terminal until configuration changes.
+- Each retry signs a new machine token and `jti`. The business idempotency key and payload remain unchanged.
+
+Transport failures must not start Sense, Brain or Bell with weakened authentication. Rollback disables the connector and preserves local facts, Outbox/Receipt state and last-known-good configuration.

contracts/transport/v1/transport-policy.schema.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://yovision.local/contracts/transport/v1/transport-policy.schema.json",
+  "title": "YoVision machine transport policy v1",
+  "type": "object",
+  "additionalProperties": false,
+  "required": ["version", "tls_min_version", "verify_certificate", "verify_hostname", "connect_timeout_ms", "response_header_timeout_ms", "request_timeout_ms", "max_request_bytes"],
+  "properties": {
+    "version": {"const": "yovision.transport/v1"},
+    "tls_min_version": {"enum": ["1.2", "1.3"]},
+    "verify_certificate": {"const": true},
+    "verify_hostname": {"const": true},
+    "connect_timeout_ms": {"type": "integer", "minimum": 100, "maximum": 30000},
+    "response_header_timeout_ms": {"type": "integer", "minimum": 100, "maximum": 30000},
+    "request_timeout_ms": {"type": "integer", "minimum": 100, "maximum": 60000},
+    "max_request_bytes": {"type": "integer", "minimum": 1, "maximum": 10485760}
+  }
+}

docs/02-architecture-and-code-map.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Architecture-and-Code-Map
 wiki_url: https://git.ilapage.cn/ila/yovision/wiki/Architecture-and-Code-Map.-
-wiki_revision: 812e822990d8c8e82445bd19ced67aca8c10aba4
-synchronized_at: 2026-08-31T01:58:55Z
+wiki_revision: 41c2193b2f1edb37abe1e8994d65d02207549039
+synchronized_at: 2026-08-31T03:18:12Z
 <!-- gitea-wiki-mirror:end -->
 
 # 架构与代码地图
@@ -344,3 +344,13 @@ Brain internal candidate / Sense local event
 
 Brain candidate、Sense candidate/Outbox 与 Bell Event/Receipt/Alert 继续是各自内部模型。当前没有新增可运行的跨端 ingress/relay，不能把冻结 Schema 解释为端到端链路已完成。
 <!-- standard-event-evidence-v1:end -->
+
+<!-- machine-identity-v1:start -->
+## 三项目机器身份与安全传输 v1
+
+工单 #151 已于 2026-08-31 验收并通过 PR #162 合入 `dev`。共享事实源为 `contracts/machine-identity/v1/**` 与 `contracts/transport/v1/**`；Sense、Brain、Bell 分别在自己的 `integration/machine_identity/` 中保留独立适配，不共享用户、JWT、Cookie、Casbin、数据库或业务实现。
+
+v1 使用 HTTPS 上的 Ed25519 短期请求绑定 JWS。每个部署实例拥有独立 principal、`kid` 和仓库外私钥；消费者使用本地外部公钥注册表，按精确 audience 与最小 scope 授权。令牌绑定 HTTP 方法、规范化路径和正文 SHA-256，有效期最多 300 秒、时钟偏差最多 30 秒，并以 `(principal,jti)` 原子防重放。TLS 最低 1.2，证书链与主机名验证不可关闭。
+
+Sense/Bell 使用 Go 标准库 Ed25519，Brain 冻结 `cryptography==50.0.1`。固定跨语言向量证明 Go/Python 可互相验签。#151 只提供身份、注册表、传输策略及可注入 replay 接口；#152/#153 才注册业务 endpoint，并必须使用各产品独立的持久原子 replay store验证重启，不能共享数据库。
+<!-- machine-identity-v1:end -->

docs/03-business-rules-and-glossary.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Business-Rules-and-Glossary
 wiki_url: https://git.ilapage.cn/ila/yovision/wiki/Business-Rules-and-Glossary.-
-wiki_revision: bc4a1a7be268028fa85717b71f48f7dd75cc7e52
-synchronized_at: 2026-08-31T01:59:04Z
+wiki_revision: 7a91edf3ca35ade3e254937c4a68b53d816a3eea
+synchronized_at: 2026-08-31T03:18:24Z
 <!-- gitea-wiki-mirror:end -->
 
 # 业务规则与术语
@@ -262,3 +262,15 @@ synchronized_at: 2026-08-31T01:59:04Z
 - **Bell 所有权**：Bell 独占内部 Event/Receipt、规则、Alert、ack、close、通知与用户审计；上游不得写入这些状态。
 - **兼容与回退**：未知主版本终止接收但保留已有事实；破坏性变化发布新主版本。回退停用新生产者版本，不删除 Outbox、Receipt、Event 或审计。
 <!-- standard-event-evidence-v1:end -->
+
+<!-- machine-identity-v1:start -->
+## 机器身份、权限和重放规则
+
+- 机器 principal 格式为 `yv:<sense|brain|bell>:<instance>`，每个产品实例独立；不得替代、携带或映射 Sense/Bell 用户身份。
+- v1 audience 只允许 `yovision-sense`、`yovision-brain`、`yovision-bell`；scope 只允许 `source-config:write`、`runtime-status:write`、`events:ingest`、`evidence:read`，没有通配符。
+- 机器令牌只能从 Authorization Bearer 读取，不接受管理员密码、浏览器 JWT/Cookie、query token、共享 secret 或其他产品用户身份。
+- 相同 `(principal,jti)` 只能成功一次；传输重试必须签发新令牌和 jti，但业务幂等键与载荷保持不变。
+- 私钥只存在于仓库外受操作系统保护的文件或秘密存储；运行配置只引用路径。公钥注册表属于各消费者本地配置，不是共享数据库。
+- 轮换先登记新 `kid`，最多并存 24 小时，切换后移除旧 key；禁用 principal 或吊销 `kid` 对每次请求即时生效。
+- 回退只能关闭 connector 并恢复三端独立运行，不得降级为明文、共享管理员身份、共享 JWT 或跳过签名/TLS 验证。
+<!-- machine-identity-v1:end -->

docs/04-local-development-and-verification.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Local-Development-and-Verification
 wiki_url: https://git.ilapage.cn/ila/yovision/wiki/Local-Development-and-Verification.-
-wiki_revision: d11757b202117e028878802e1e8a9ba9df1a8e89
-synchronized_at: 2026-08-31T01:59:13Z
+wiki_revision: 771fdd92eb03e9dff7d3ae20b7cb89f1ca288959
+synchronized_at: 2026-08-31T03:18:34Z
 <!-- gitea-wiki-mirror:end -->
 
 # 本地开发与验证
@@ -679,3 +679,30 @@ git diff --check
 
 这些测试只验证冻结契约，不验证 #153 产品 mapper/relay/ingress、#151 机器身份、实际证据存储/授权、网络断线补投或跨项目 E2E。
 <!-- standard-event-evidence-v1:end -->
+
+<!-- machine-identity-v1:start -->
+## 机器身份与安全传输 v1 验证
+
+从仓库根目录执行隔离契约测试：
+
+```powershell
+pwsh -NoProfile -File contracts/tests/machine-identity-v1/run.ps1
+```
+
+脚本在系统临时目录建立虚拟环境，按固定 `cryptography==50.0.1` 和 `jsonschema==4.25.1` 验证封闭 Schema、Go/Python 固定 Ed25519 向量、请求绑定、Bearer-only、错 audience/scope、过期、重放、轮换、吊销和 TLS policy，结束后删除所属临时目录。
+
+三端定向验证：
+
+```powershell
+cd Sense/server
+go test -race ./app/sense/integration/machine_identity
+
+cd ../../Bell/server
+go test -race ./app/bell/integration/machine_identity
+
+cd ../..
+Brain\.venv\Scripts\python.exe contracts\tests\machine-identity-v1\test_contract.py
+```
+
+这些测试只证明 #151 身份和传输基础。真实客户 PKI/网络、现场时钟漂移、业务 endpoint、断网补投以及持久 replay 重启恢复由 #152/#153/#155 验证；不得用进程内 replay store替代生产结论。
+<!-- machine-identity-v1:end -->

docs/06-troubleshooting.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Troubleshooting
 wiki_url: https://git.ilapage.cn/ila/yovision/wiki/Troubleshooting
-wiki_revision: 046624c1b2d7963ef733b4c9687d5dec14771388
-synchronized_at: 2026-08-27T09:05:32Z
+wiki_revision: 75bf70f375f58356e968b45139b54fcae391d1e8
+synchronized_at: 2026-08-31T03:18:53Z
 <!-- gitea-wiki-mirror:end -->
 
 # 故障排查
@@ -161,3 +161,18 @@ synchronized_at: 2026-08-27T09:05:32Z
 3. 若同步提示本地镜像有未提交修改，先核对改动归属并停止覆盖。
 4. Wiki 页面缺失、没有 revision、MCP/API 凭据不可用或映射准备删除/重命名时停止，由工单确认后处理。
 5. PowerShell 显示乱码时先区分文件编码和控制台输出编码，不默认另起 PowerShell 或使用 `-ExecutionPolicy Bypass`。
+
+<!-- machine-identity-v1:start -->
+## 机器身份 v1 排错
+
+| 现象/错误码 | 常见原因 | 检查 | 安全处理 |
+|---|---|---|---|
+| `machine_token_missing` | 未使用 Authorization Bearer 或格式错误 | 检查 connector 配置，不粘贴令牌 | 修复调用方；不改用 Cookie/query token |
+| `machine_token_invalid` | 签名、kid、请求方法/路径/正文摘要或封闭字段不匹配 | 核对版本、kid 和请求绑定 | 停止重试，修复配置/实现 |
+| `machine_token_expired` | 时钟偏差或令牌超过 5 分钟 | 检查双方 UTC 时钟 | 校时并签发新令牌，不延长长期 token |
+| `machine_audience_denied` / `machine_scope_denied` | 目标产品或最小权限不匹配 | 核对公钥注册表和调用方向 | 修正精确授权，不添加通配符 |
+| `machine_identity_revoked` | principal/key 已禁用或吊销 | 核对当前 kid 与轮换状态 | 切换已批准新 key；不得恢复旧 key绕过吊销 |
+| `machine_token_replayed` | 同一 jti 被再次使用 | 检查重试是否重新签名 | 新建 jti，保留业务幂等键 |
+
+排错日志只记录稳定错误码、已认证 principal/kid 和 correlation ID；不得记录令牌、签名、密钥、完整 Authorization header 或秘密路径。无法安全恢复时关闭 connector，三端保持独立运行。
+<!-- machine-identity-v1:end -->

docs/delivery/deployment-and-operations.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Deployment-and-Operations
 wiki_url: https://git.ilapage.cn/ila/yovision/wiki/Deployment-and-Operations.-
-wiki_revision: 0a772b0511044d98430ebd93304faa3dee57183d
-synchronized_at: 2026-08-31T01:39:35Z
+wiki_revision: 54d720aa07d2c40684da3fc04378393c7f318a04
+synchronized_at: 2026-08-31T03:20:15Z
 <!-- gitea-wiki-mirror:end -->
 
 # YoVision 部署与运维
@@ -142,3 +142,15 @@ Sense\start_sense.bat
 
 因此现阶段部署仍按 Sense、Brain 各自独立入口进行，不得手工共享数据库、用户 JWT/Cookie、摄像头凭据、文件目录或临时 JSON 字段来提前打通。需要停用或回退时保持两端独立运行，并保留上一已确认的配置与最后已知状态；未知协议主版本必须停止摄取而不是覆盖投影。
 <!-- sense-brain-contracts-v1:end -->
+
+<!-- machine-identity-v1:start -->
+## 机器身份部署与轮换边界
+
+#151 已冻结机器身份和传输基础，但 #152/#153 尚未注册业务 connector，因此当前不得手工拼接 endpoint 或临时共享凭据提前打通。
+
+部署时为每个调用实例独立生成 Ed25519 私钥，保存到仓库外受 ACL/秘密存储保护的位置；产品配置只记录私钥路径、principal、kid、目标 audience 和最小 scope。消费者从仓库外公钥注册表读取受信 principal/kid。不得把私钥、完整令牌、Authorization header、管理员密码、浏览器 JWT/Cookie 或 query token写入配置样例、日志、工单和备份。
+
+传输固定使用 HTTPS，TLS 最低 1.2并验证证书链与主机名。轮换按“先登记新公钥 → 调用方切换新 kid → 验证流量 → 24 小时内移除旧 key”执行；应急吊销直接禁用 principal 或 key，并同时停用相关 connector。回退保持 Sense、Brain、Bell 独立运行，保留 Outbox、Receipt、Event 和最后已知状态。
+
+#152/#153 必须为各产品注入自己的持久原子 `(principal,jti)` replay store并验证重启；内存 replay store 只用于适配测试或不重启的单进程原语。
+<!-- machine-identity-v1:end -->