- JwtAuthenticationFilter extracts JWT from Authorization header or query param, validates via JwtService
- SecurityConfig creates stateless SecurityFilterChain with public/protected endpoint split
- AgentRegistrationController requires bootstrap token, returns accessToken + refreshToken + serverPublicKey
- New POST /agents/{id}/refresh endpoint issues new access JWT from valid refresh token
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>