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holocron/plugins/git/skills/pc-author/references/create-config.md
Defame1297 af8b46cd57 chore(plugins): sync generated content mirrors
Regenerate plugins/*/skills/ from plugins/*/.apm/ after the previous
four commits, via scripts/sync-plugin-content.sh --all. The mirror is
generated output (ADR-0017) that check-plugin-content-sync's pre-push
hook diffs against .apm/; nothing here is hand-edited.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EeH8SCbcrCAQrtymkNuhKP
2026-09-07 20:43:51 +00:00

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Markdown

---
source_keys:
- context7-pre-commit-com
- pre-commit-com
---
# Creating a `.pre-commit-config.yaml`
Reached from `SKILL.md`'s Route table when the repo has no config yet. Self-contained — the modify
flow's file is not needed here. `SKILL.md`'s three common gates still apply.
## Steps
1. Detect what languages are actually in the repo with a shallow extension scan, rather than
inferring them from the project's name or README:
```bash
rtk git ls-files | grep -oE '\.[a-z]+$' | sort | uniq -c | sort -rn
```
2. Read `references/hooks-by-language.md` and map the detected extensions to recommended hooks.
Take the repo URL, `rev` and args from that file rather than from memory — a `rev` that does not
exist is the most common way a fresh config fails on its first run.
For a deliberately minimal starting point instead of a full recommendation set,
`pre-commit sample-config > .pre-commit-config.yaml` prints a small starter config to build on.
3. State the proposed config in full and wait for the user's confirmation.
4. Write `.pre-commit-config.yaml`, then run `pre-commit validate-config`. If it exits non-zero,
show the error, fix it in place, and re-validate.