## Summary
`lefthook.yml` has been in the repo since #4147, but nothing installs
lefthook and nothing runs `lefthook install`, so the pre-push hook it
describes has never fired for anyone. #3977 had removed the `lefthook`
devDependency a week before #4147 landed, and #4147 only added the
config file.
This supplies the missing half:
```diff
+ "prepare": "lefthook install",
+ "lefthook": "^2.1.10",
"onlyBuiltDependencies": [
+ "lefthook",
```
With those in place, `pnpm install` wires the hook up on clone, and the
format and lint checks actually run before a push instead of first
failing in CI.
Also here: the pre-push jobs run in parallel rather than in sequence,
and `CONTRIBUTING.md` documents the hook, including how to skip it and
the fact that GitButler only runs hooks when "Run hooks" is enabled in
its settings.
`lefthook@2.1.10` is the current release.
Adds a lefthook `pre-push` job that runs the same checks as CI
code-quality (`oxfmt --check .` + `oxlint .`), so formatting/lint
failures are caught locally before they reach a PR. Uses the existing
lefthook setup - no new tooling.
Caveat noted in the config: GitButler uses its own git implementation
and only runs hooks when "Run hooks" is enabled in its per-project
settings; with that off, this protects plain `git push`. Enable that
setting to have it fire on `but push` too.
Chris Arderne