Lefthook

Create or update Lefthook configuration with exact option names, practical defaults, and clear debugging steps. Explain the tool briefly, then produce a working config for the current repository.

Use this skill when the task mentions:

• lefthook.yml, .lefthook.yml, .config/lefthook.yml, lefthook-local.yml, or another lefthook-local.* file
• Git hooks such as pre-commit, commit-msg, pre-push, post-merge, or post-checkout
• lefthook install, lefthook run, lefthook dump, or lefthook validate
• choosing between commands, jobs, and scripts
• placeholders such as {staged_files}, {push_files}, {all_files}, {files}, or {1}
• hook bugs such as commands not running, wrong files matching, fixed files not restaged, or local-only wrappers leaking into shared config

Non-Negotiables