docs(rules): git-hazards #8 — vanished staged file means a coworker committed it - #338
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…ommitted it Session-distilled (2026-07): a staged file disappearing from a shared checkout, with git status flapping A→M across consecutive calls, was nearly misdiagnosed as pre-commit stash loss. The real cause was a coworker Claude session committing the file to main mid-flight. Codify the discriminator (git log -1 -- <path> before any recovery), the blind-restore downgrade risk, and status-flapping as the coworker tell. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LpXfWJDmEAgZ29o7Kkj9Ff
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Please fix the broken links before merging.
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What
Adds hazard #8 to
git-hazards.md(and bumps the header to "Eight traps"): in a shared checkout, a staged file that vanishes — withgit statusflappingA→Macross consecutive calls — usually means a coworker session committed it mid-flight, not that pre-commit's stash dance lost it.Codifies:
git log --oneline -3(did HEAD move?) +git log -1 -- <path>HEAD:<path>firstWhy
Distilled from a live incident this session: the wrong theory was minutes from being acted on, and the restored copy would have downgraded the committed version (it lacked frontmatter the coworker had added).
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https://claude.ai/code/session_01LpXfWJDmEAgZ29o7Kkj9Ff