# Roadmap: v1.54 Subprocess Error Diagnostics

## Result

`v1.54` is complete.

## Phases

- [x] **Phase 94: Subprocess Error Contracts**
- [x] **Phase 95: Service And Frontdoor Subprocess Diagnostics**
- [x] **Phase 96: Closure And Regression Audit**

## Outcome

`v1.54` now has:

- structured subprocess failure messages that include context, returncode, and
  command strings
- better operator diagnostics for `aitp_service._run()` and
  `migrate_local_install()`
- subprocess error contract tests plus a green maintainability/full-suite
  baseline
