Rewrite test to use 3-tier auth fallback (from dialog-engine pattern):
ANTHROPIC_API_KEY → CLAUDE_CODE_OAUTH_TOKEN → macOS Keychain.
No dedicated API key required — works with Claude subscription.
- Auto-start/stop SynapBus server (--auto-server flag)
- Dialog-engine tool loop pattern (max rounds + forced text termination)
- Token usage and cost tracking
- Add spec for E2E agent testing framework (011)
Tested: two Claude agents (Alice, Bob) autonomously exchange messages
through SynapBus MCP Streamable HTTP. Cost: ~$0.07 per run.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
