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git-guardrails

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Use when a repository needs Git safety controls: guard destructive commands, set up gitignore or fix gitignore when untracked files keep appearing, or install or repair a repository-local pre-commit hook from project gates, including package-manager-native commit-time checks. Not for remote, credential, publish, deploy, or irreversible changes.

.devin/skills/git-guardrails/SKILL.md

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Sep 28, 2026
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Apache-2.0

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# Manage Git repository guardrails

## Contract

| Field | Bound contract |
|---|---|
| Trigger | A repository needs destructive-command protection, deterministic `.gitignore` composition, or installing or repairing one repository-local pre-commit owner from project gates; this includes `set up gitignore`, `fix gitignore`, `untracked files keep appearing`, and package-manager-native commit-time checks. |
| Authority | Reversible local: guard mode writes only the installed hook and one merged settings entry; `setup-gitignore` mode writes only the repository `.gitignore`; `setup-pre-commit` mode writes only hook configuration, dependency manifests, lockfiles, a temporary probe file, a staged trivial change, and the local Git hook. Rollback is mode-specific cleanup or restoration. No remote, credential, or release mutation. |
| Side effect | Installs a command guard and settings registration, or deterministically composes `.gitignore`, or selects/installs one pre-commit manager and runs repository-native checks. |
| Done | The chosen mode meets its gate: guard mode passes all 16 payloads and registers the hook; `setup-gitignore` mode produces deterministic managed sections and reports before/after untracked counts; `setup-pre-commit` mode has exactly one manager owning the hook, its all-files command passes without formatter residue, a deliberate failing probe blocks, and the restored passing probe exits zero. |

## Inputs

- Mode (required, chosen by the user): `guard`, `setup-gitignore`, or `setup-pre-commit`.