Learning
Highlights
- Fixed BYOXPC startup by forcing mach‑service mode even when launchd doesn’t forward --mach-service, avoiding the libxpc/xpc_main breakpoint.
- Added tested external runner install guidance (BYOXPC and MachMe) plus a quick smoke request and troubleshooting notes in the user guide.
- Moved sb_api_validator into controller/tools/ and updated build/docs to match.