# Phase 1.0BZ: exact SDL stage cleanup gate

Status: `PATCH_TARGET_HASHES_BOUND_EXACT_FAILED_STAGE_CLEANUP_ALLOWED_ONCE`

Date: 2026-07-30

The BY fixture read the WSL `.git` indirection and hashed all four expected
patch targets. Their exact hashes are recorded in the manifest. The indirection
explains why Windows Git could not open this WSL-created worktree.

BZ permits one forced WSL Git worktree removal for only the exact failed
`build/phase10bd/sdl-source` stage. This destructive cleanup is bounded to the
hash-recorded, dirty derived checkout; it does not include other temporary
worktrees, the clean SDL source, build outputs or any device. No retry or source
change is authorized.