# Phase 93: Closure And Regression Audit - Context

**Gathered:** 2026-04-11
**Status:** Implemented and verified
**Mode:** Final closure phase for `v1.53`

<domain>
## Phase Boundary

Close `v1.53` with maintainability-budget confirmation and a fresh full-suite
baseline.

</domain>

<decisions>
## Implementation Decisions

### Locked decisions

- require the maintainability watch budget to stay green because the touched
  hotspot file is watchlisted
- keep backlog `999.11` marked partial rather than pretending this one slice
  closes subprocess/state-file/planning-noise friction too

</decisions>

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*Phase: 93-closure-and-regression-audit*
*Context captured on 2026-04-11 after Phase 93 implementation and verification*
