- Add REGISTRATION_TOKEN config for new secure registration flow
- Add agent_secret and credentials_path config options
- Update HTTP client to use X-Agent-Id/X-Agent-Secret headers
- Add credential persistence to ~/.letsbe-agent/credentials.json
- Load persisted credentials on startup to survive restarts
- Verify credentials via heartbeat before skipping registration
- Maintain backward compatibility with legacy Bearer token auth
The agent now:
1. First tries to load persisted credentials
2. Validates them via heartbeat
3. Falls back to registration if invalid/missing
4. Persists new credentials after successful registration
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>