When a task adds/removes a dependency without regenerating the lockfile,
the inferred `pnpm install --frozen-lockfile` (and yarn/bun equivalents)
in the AI-merge clean room fails with ERR_PNPM_OUTDATED_LOCKFILE, dead-
ending the merge. Detect that specific frozen-refusal and retry once
non-frozen (pnpm gets explicit --no-frozen-lockfile to override any CI
default), regenerating the lockfile and recomputing the install marker.
A configured worktreeInitCommand keeps its authoritative frozen intent
and still hard-fails. Surfaced via the merge:ai-deps-sync run-audit event.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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