adding git hooks to catch pipeline issues before pushing

docs/development/agents-md-index.md

@@ -153,18 +153,25 @@ Adjust `max_files` to show more/fewer files before truncation:
 
 ### Pre-commit Hook (Optional)
 
-Add to `.git/hooks/pre-commit`:
+The repository now includes a versioned hook at `.githooks/pre-commit`.
+
+Install it once per clone:
 
 ```bash
-#!/bin/bash
-# Regenerate AGENTS.md if documentation changed
-if git diff --cached --name-only | grep -qE '^(docs|scripts|work-summary)/'; then
-    echo "Regenerating AGENTS.md..."
-    make generate-agents-index
-    git add AGENTS.md
-fi
+make install-git-hooks
 ```
 
+The hook currently runs:
+
+```bash
+make pre-commit
+```
+
+That checks:
+
+- `cargo fmt --all -- --check`
+- `cargo deny check`
+
 ### CI/CD Integration
 
 Add to your CI pipeline to ensure the index stays current:
@@ -208,4 +215,4 @@ attune/
 - [Vercel Blog: AGENTS.md outperforms .md skills](https://vercel.com/blog/agents-md-outperforms-skills-in-our-agent-evals)
 - Template: `AGENTS.md.template` (edit this)
 - Script: `scripts/generate_agents_md_index.py`
-- Output: `AGENTS.md` (generated, do not edit)
+- Output: `AGENTS.md` (generated, do not edit)