Add @mariozechner/pi-ai mock to restart.integration.test.ts and
project-runtime.test.ts to fix module linking errors. Fix call count
assertions in executor and restart tests to account for the
retry-without-task_done behavior.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add ProjectRuntime interface with InProcessRuntime and ChildProcessRuntime implementations
- Implement HybridExecutor for multi-project task orchestration
- Add IPC protocol for host-worker communication in child-process mode
- Implement health monitoring with automatic restart for child processes
- Add comprehensive tests for hybrid-executor and project-runtime
- Update AGENTS.md with multi-project runtime documentation
- Add changeset for hybrid-executor-runtime release
