Phase 7: Built-in Hooks (audit_log, dangerous_confirmation, security_scan) Phase 8: Plugin system (PluginManager, PluginSandbox, PluginManifest) Phase 9: Skills registry (SkillRegistry, local/plugin/MCP loaders) Phase 10: TeamLeader, RemoteTransport, BackgroundTaskManager
Add Day 1 agent runtime foundations with task and event schemas, verifier support, capability metadata, graph event tracing, and regression coverage while preserving the direct execution path.