add precommit skill for fixing pre-commit hook failures

.claude/skills/precommit/SKILL.md

@@ -0,0 +1,61 @@
+---
+name: precommit
+description: Run pre-commit hooks and fix any failures. Use when the user asks to run pre-commit, fix CI, fix clippy, fix formatting, or when preparing code for a PR.
+---
+
+# Fix Pre-commit Failures
+
+Run pre-commit and fix all failures before committing or pushing.
+
+## Run it
+
+```bash
+cd /Users/ahafeez/dev/plano && pre-commit run --all-files
+```
+
+Requires `["all"]` sandbox permissions (jemalloc build needs temp dir access).
+
+## Hooks and how to fix each
+
+### check-yaml
+YAML syntax errors. Fix the YAML file directly. Excludes `config/envoy.template*`.
+
+### end-of-file-fixer / trailing-whitespace
+Auto-fixed by the hook. Just re-stage the files and re-run.
+
+### cargo-fmt
+```bash
+cd crates && cargo fmt --all
+```
+Then re-stage changed files.
+
+### cargo-clippy
+Runs `cargo clippy --locked --all-targets --all-features -- -D warnings`.
+
+Common fixes:
+- `collapsible_match`: Collapse `if` inside a `match` arm into a guard clause. Add a fallthrough arm if the guard makes the match non-exhaustive.
+- `dead_code`: Remove unused fields/functions, or add `#[allow(dead_code)]` if intentional.
+- `unused_imports`: Remove the import.
+- `clippy::too_many_arguments`: Add `#[allow(clippy::too_many_arguments)]`.
+
+**Important**: Clippy runs on the full workspace including `hermesllm`, `common`, `llm_gateway`, `prompt_gateway` — not just `brightstaff`. Pre-existing warnings in other crates will fail CI too. Fix them.
+
+### cargo-test
+```bash
+cd crates && cargo test --lib
+```
+Fix failing tests. If a test fails due to your change, update the test. If it's pre-existing, still fix it.
+
+### gitleaks
+Hardcoded secrets detected. Remove the secret, use env vars instead.
+
+### black
+Python formatting. Auto-fixes on first run. Re-stage and re-run.
+
+## Workflow
+
+1. Run `pre-commit run --all-files`
+2. For each failure: fix the issue
+3. Stage fixes with `git add`
+4. Run `pre-commit run --all-files` again until all pass
+5. Then commit