Algis DumbrisandClaude Opus 4.6
050b3cbde3
Add public A2A Agent Card endpoint that exposes registered agents as skills for cross-platform agent discovery. Includes admin CLI for updating agent capabilities, which populate skill tags and descriptions in the card. - internal/a2a: new package with AgentCard generator, HTTP handler, and tests - agents store/service: add ListAllActiveAgents (excludes human accounts) - admin socket: add agent.update_capabilities command - admin CLI: add `agent update-capabilities --name --capabilities` subcommand - main.go: register /.well-known/agent-card.json route (public, no auth) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
package a2a
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import (
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"context"
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"encoding/json"
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"net/http"
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)
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// AgentLister abstracts the operation of listing active non-human agents.
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type AgentLister interface {
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ListAllActiveAgents(ctx context.Context) ([]AgentInfo, error)
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}
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// NewAgentCardHandler returns an http.HandlerFunc that serves the A2A Agent
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// Card JSON document at /.well-known/agent-card.json.
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//
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// The handler is public (no auth required) because Agent Cards are meant for
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// discovery. If configuredBaseURL is empty the base URL is derived from the
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// incoming request (respecting X-Forwarded-* headers).
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func NewAgentCardHandler(agentLister AgentLister, configuredBaseURL string, version string) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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return
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}
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// Derive base URL from request if not configured.
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baseURL := configuredBaseURL
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if baseURL == "" {
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scheme := "http"
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if r.TLS != nil {
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scheme = "https"
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}
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if proto := r.Header.Get("X-Forwarded-Proto"); proto != "" {
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scheme = proto
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}
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host := r.Host
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if fwdHost := r.Header.Get("X-Forwarded-Host"); fwdHost != "" {
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host = fwdHost
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}
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baseURL = scheme + "://" + host
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}
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agents, err := agentLister.ListAllActiveAgents(r.Context())
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if err != nil {
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http.Error(w, "internal error", http.StatusInternalServerError)
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return
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}
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card := GenerateAgentCard(baseURL, version, agents)
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w.Header().Set("Content-Type", "application/json")
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w.Header().Set("Cache-Control", "public, max-age=60")
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json.NewEncoder(w).Encode(card)
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}
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}
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