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**Table of Contents**

- [Git Hooks Audit Report - ggen Project](#git-hooks-audit-report---ggen-project)
  - [Executive Summary](#executive-summary)
    - [Current Status](#current-status)
  - [1. ACTIVE HOOKS](#1-active-hooks)
    - [1.1 Pre-Push Hook (`.git/hooks/pre-push`)](#11-pre-push-hook-githookspre-push)
      - [Location](#location)
      - [Implementation Details](#implementation-details)
      - [Design Philosophy](#design-philosophy)
      - [Issues & Observations](#issues--observations)
    - [1.2 Pre-Commit Hook (BACKUP - NOT ACTIVE)](#12-pre-commit-hook-backup---not-active)
      - [Purpose](#purpose)
      - [Implementation Details](#implementation-details-1)
      - [Key Differences from Pre-Push Hook](#key-differences-from-pre-push-hook)
      - [Why Deactivated?](#why-deactivated)
      - [Recommendation](#recommendation)
  - [2. INSTALLATION SCRIPTS](#2-installation-scripts)
    - [2.1 `scripts/install-git-hooks.sh` (115 lines)](#21-scriptsinstall-git-hookssh-115-lines)
    - [2.2 `scripts/install-hooks.sh` (26 lines)](#22-scriptsinstall-hookssh-26-lines)
  - [3. CURRENT HOOK STATUS](#3-current-hook-status)
    - [What's Actually Active?](#whats-actually-active)
    - [How to Check Current Hooks](#how-to-check-current-hooks)
  - [4. ANDON SIGNALS & QUALITY STANDARDS](#4-andon-signals--quality-standards)
    - [CLAUDE.md Policy](#claudemd-policy)
  - [5. SECURITY & RELIABILITY ANALYSIS](#5-security--reliability-analysis)
    - [Strengths ✅](#strengths-)
    - [Weaknesses ⚠️](#weaknesses-)
  - [6. HOOK EXECUTION FLOW](#6-hook-execution-flow)
    - [Current Pre-Push Execution](#current-pre-push-execution)
    - [Why Pre-Commit Not Active](#why-pre-commit-not-active)
  - [7. RECOMMENDATIONS](#7-recommendations)
    - [CRITICAL (Must implement)](#critical-must-implement)
    - [HIGH (Should implement)](#high-should-implement)
    - [MEDIUM (Nice to have)](#medium-nice-to-have)
  - [8. FILES INVENTORY](#8-files-inventory)
    - [Hook Scripts](#hook-scripts)
    - [Installation Scripts](#installation-scripts)
    - [Configuration](#configuration)
    - [Other Hook Scripts](#other-hook-scripts)
  - [9. ACTION ITEMS](#9-action-items)
  - [10. CONCLUSION](#10-conclusion)

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# Git Hooks Audit Report - ggen Project
**Date**: November 21, 2025  
**Project**: ggen (Rust language-agnostic code generation CLI)

## Executive Summary

The ggen project has **2 active git hooks** and **multiple installation scripts**. The hooks enforce code quality, testing, and security standards before commits and pushes.

### Current Status
- ✅ **Pre-push hook**: ACTIVE (simplified 5-gate validation)
- ⚠️ **Pre-commit hook**: BACKUP only (linked as `pre-commit.bak`, not active)
- 📋 Multiple installation/deployment scripts available

---

## 1. ACTIVE HOOKS

### 1.1 Pre-Push Hook (`.git/hooks/pre-push`)
**Status**: ✅ ACTIVE & FUNCTIONAL  
**Last Modified**: Nov 21, 2025  
**Size**: 1,177 bytes  
**Permissions**: `rwx--x--x` (executable)

#### Location
- Hook: `.git/hooks/pre-push` (symlink → `scripts/pre-push-hook.sh`)
- Implementation: `scripts/pre-push-hook.sh`

#### Implementation Details
```bash
#!/bin/bash
# Pre-push hook: Simplified 5-gate validation
# Focus: cargo, formatting, unit tests, security
```

**Five validation gates:**
1. **Cargo Check** (15s timeout)
   - Command: `cargo make check-pre-push`
   - Validates: Compilation, no syntax errors
   - Failure: BLOCKS push ❌

2. **Clippy Linting** (no timeout specified)
   - Command: `cargo make lint`
   - Validates: Code quality, best practices
   - Failure: BLOCKS push ❌

3. **Code Formatting** (auto-fixes)
   - Command: `cargo fmt --all --check`
   - Validates: Rust code formatting compliance
   - Failure: Auto-fixes via `cargo fmt --all`, then exits (allows retry)

4. **Unit Tests** (no timeout specified)
   - Command: `cargo make test-unit`
   - Validates: All unit tests pass
   - Failure: BLOCKS push ❌

5. **Security Audit** (warning only)
   - Command: `cargo make audit`
   - Validates: Security vulnerabilities in dependencies
   - Failure: Logs warning, but allows push ⚠️

#### Design Philosophy
- **Simple and effective**: 5 core checks, no complex filtering
- **No expect/unwrap checking**: Removed overly strict validation
- **Test-file exempt**: Test code can use `unwrap()` and `expect()`
- **Production-focused**: Checks actual compilation, not style obsessions

#### Issues & Observations
⚠️ **Gate 4 (Unit Tests)**: No explicit timeout
- Could hang indefinitely if tests deadlock
- **Recommendation**: Add `timeout 300s` (5 minutes)

⚠️ **Gate 2 (Clippy)**: No explicit timeout
- Clippy can be slow on large projects
- **Recommendation**: Add `timeout 120s` (2 minutes)

✅ **Gate 3 (Formatting)**: Smart auto-fix
- Automatically runs `cargo fmt` if checks fail
- Allows developer to review and retry
- Good UX

✅ **Gate 5 (Security)**: Non-blocking
- Appropriate for security warnings
- Doesn't block valid code from deploying
- Logs should be reviewed before production

---

### 1.2 Pre-Commit Hook (BACKUP - NOT ACTIVE)
**Status**: ⚠️ INACTIVE (backed up, not linked)  
**Location**: `.git/hooks/pre-commit.bak` → `scripts/pre-commit-hook.sh`  
**Size**: 3,573 bytes  
**Permissions**: `rwxr-xr-x` (executable)

#### Purpose
Backup of a more comprehensive pre-commit hook that was replaced by the pre-push hook strategy.

#### Implementation Details
```bash
#!/usr/bin/env bash
# Pre-Commit Hook for ggen
# Validates all critical checks before allowing commit
```

**Validation checks (6 gates):**
1. **Compilation check** (15s) - `cargo make check`
2. **Format check** (10s) - `cargo fmt --check`
3. **Linting** (15s) - `cargo make lint`
4. **Unit tests** (160s) - `cargo make test-unit`
5. **Security audit** (10s) - `cargo audit`
6. **Debug prints detection** - Grep-based scan

#### Key Differences from Pre-Push Hook
- ✅ Includes debug print detection (CLI tools & tests exempted)
- ✅ Explicit timeouts for all checks
- ✅ Uses `run_check()` function for consistent error reporting
- ✅ Color-coded output (RED, GREEN, YELLOW)
- ⚠️ More complex logic (checks for timeout command availability)
- ⚠️ More aggressive validation (might block valid commits)

#### Why Deactivated?
1. **Pre-push is simpler**: Focused on actual blocker issues
2. **Pre-commit can be annoying**: Developers don't want to wait 160s+ before committing locally
3. **Strategy shift**: Validate at push time instead of commit time

#### Recommendation
Consider **re-activating with modifications**:
- Run faster subset (skip full unit tests locally)
- Keep debug print detection
- Allow skip for specific commits (`--no-verify`)

---

## 2. INSTALLATION SCRIPTS

### 2.1 `scripts/install-git-hooks.sh` (115 lines)
**Purpose**: Comprehensive hook installation with gap detection  
**Last Modified**: Oct 10, 2023 (OUTDATED)

**Installs:**
- Pre-commit hook with binary support (fallback to shell)
- Pre-push hook with gap detection
- Test coverage enforcement
- Doctest verification

**Capabilities:**
- ✅ Detects compiled Rust binary (`git_hook_pre_commit`)
- ✅ Fallback to shell script if binary unavailable
- ✅ Integrates test gap detection and coverage enforcement
- ✅ Validates doctests before commit

**Issues:**
❌ **OUTDATED** - Last modified Oct 2023, not aligned with current hooks  
❌ **Complex logic** - Creates different hooks based on binary availability  
❌ **Potential conflicts** - May overwrite current simplified hooks

---

### 2.2 `scripts/install-hooks.sh` (26 lines)
**Purpose**: Simple hook installation  
**Last Modified**: Nov 21, 2025 (CURRENT)

**Installs:**
- Pre-commit hook symlink only
- No pre-push hook

**Code:**
```bash
#!/usr/bin/env bash
ln -sf "$SCRIPT_DIR/pre-commit-hook.sh" "$HOOKS_DIR/pre-commit"
chmod +x "$HOOKS_DIR/pre-commit"
```

**Issues:**
⚠️ **Incomplete** - Only installs pre-commit, not pre-push  
⚠️ **Silent** - Minimal output (newer version but missing pre-push)

---

## 3. CURRENT HOOK STATUS

### What's Actually Active?
```
.git/hooks/
├── pre-push → ../../scripts/pre-push-hook.sh ✅ ACTIVE
├── pre-commit.bak → /Users/sac/ggen/scripts/pre-commit-hook.sh (NOT LINKED)
├── [50+ .sample files] (default git hooks)
└── [other sample hooks]
```

**Only `pre-push` is active.**  
**Pre-commit is NOT active** (backed up as `.bak`).

### How to Check Current Hooks
```bash
ls -la .git/hooks/ | grep -v sample
```

---

## 4. ANDON SIGNALS & QUALITY STANDARDS

### CLAUDE.md Policy
The project enforces Andon signals (visual problem indicators):

**CRITICAL (Red) - Must stop**:
- Compiler errors
- Test failures

**HIGH (Yellow) - Should stop**:
- Clippy warnings
- Linting errors

**Hook alignment:**
- ✅ **Pre-push enforces all CRITICAL signals**
- ⚠️ **Pre-commit was supposed to enforce (but inactive)**

---

## 5. SECURITY & RELIABILITY ANALYSIS

### Strengths ✅
1. **No --no-verify bypass encouraged**
   - CLAUDE.md explicitly prohibits `--no-verify`
   - Forces developers to fix real issues

2. **Comprehensive validation**
   - Compilation, linting, formatting, tests, security all checked
   - Catches most common issues before push

3. **Test-aware**
   - Test code exempt from unwrap/expect restrictions
   - Only production code validated for error handling

4. **Fast feedback**
   - Simplified to 5 gates vs 6+
   - Reasonable timeouts (or should have them)

5. **Auto-fixing**
   - Formatting issues auto-fixed with retry
   - Developer-friendly

### Weaknesses ⚠️
1. **Missing timeouts** (Gates 2 & 4)
   - Clippy and unit tests could hang indefinitely
   - Fix: Add explicit timeout values

2. **No pre-commit validation**
   - Only push-time validation
   - Could commit broken code locally
   - Pre-commit.bak exists but not active

3. **Debug print detection missing**
   - Removed from simplified hook
   - Pre-commit.bak has this feature
   - Risk: `println!` calls leak into production

4. **Doctest validation missing**
   - Not checked by pre-push hook
   - Was in pre-commit.bak
   - Risk: Documentation examples become stale/broken

5. **Gap detection removed**
   - Was in pre-push from install-git-hooks.sh
   - Not in current simplified hook
   - Risk: Untested code paths

---

## 6. HOOK EXECUTION FLOW

### Current Pre-Push Execution
```
Developer: git push
    ↓
.git/hooks/pre-push (executable)
    ↓
scripts/pre-push-hook.sh
    ├─ Gate 1: cargo make check-pre-push (compile check)
    ├─ Gate 2: cargo make lint (clippy - NO TIMEOUT ⚠️)
    ├─ Gate 3: cargo fmt --check (format check, auto-fix)
    ├─ Gate 4: cargo make test-unit (tests - NO TIMEOUT ⚠️)
    └─ Gate 5: cargo make audit (security - warnings only)
    ↓
✅ All gates passed → Push proceeds
OR
❌ Any gate failed → Push blocked, developer must fix
```

### Why Pre-Commit Not Active
The symlink `.git/hooks/pre-commit` doesn't exist, so pre-commit validation is skipped entirely.

Current workflow:
```
Developer: git commit
    ↓
No pre-commit hook (not linked)
    ↓
✅ Commit proceeds immediately
    ↓
Developer: git push
    ↓
Pre-push hook validation occurs
```

**Risk**: Can commit broken code locally, caught only at push time.

---

## 7. RECOMMENDATIONS

### CRITICAL (Must implement)
1. **Add timeouts to pre-push gates**
   ```bash
   # Gate 2: Add timeout
   if ! timeout 120s cargo make lint 2>&1 > /dev/null; then
   
   # Gate 4: Add timeout
   if ! timeout 300s cargo make test-unit 2>&1 > /dev/null; then
   ```

2. **Enable pre-commit hook validation**
   - Symlink pre-commit.bak to pre-commit OR
   - Create lightweight pre-commit (format + compile only)

3. **Document hook strategy**
   - Update CLAUDE.md with current hook implementation
   - Explain why pre-push over pre-commit

### HIGH (Should implement)
4. **Restore debug print detection**
   - Add to pre-commit (lightweight) or pre-push
   - Prevent `println!` leaking to production

5. **Restore doctest validation**
   - Critical for documentation accuracy
   - Add to pre-commit or pre-push

6. **Restore test gap detection**
   - Add to pre-push as optional check
   - Warn but don't block if gaps found

### MEDIUM (Nice to have)
7. **Improve hook output**
   - Show which tests failed
   - Better error messages

8. **Parallelization**
   - Run independent checks in parallel (compile + lint simultaneously)
   - Could save time

9. **Configuration**
   - Allow skipping specific gates via config file
   - Different timeouts per developer machine

---

## 8. FILES INVENTORY

### Hook Scripts
- `scripts/pre-push-hook.sh` (1.2 KB) - **ACTIVE**
- `scripts/pre-commit-hook.sh` (3.6 KB) - **INACTIVE** (backed up as `.bak`)

### Installation Scripts
- `scripts/install-hooks.sh` (26 lines) - Simple, current
- `scripts/install-git-hooks.sh` (115 lines) - Complex, outdated

### Configuration
- `CLAUDE.md` - Documents `--no-verify` prohibition ✅
- `Makefile.toml` - Defines `cargo make` tasks used by hooks

### Other Hook Scripts
- `scripts/git-hooks/pre-commit-toc` - Generates table of contents

---

## 9. ACTION ITEMS

| Priority | Task | Owner | Status |
|----------|------|-------|--------|
| 🔴 CRITICAL | Add timeouts to pre-push (Gates 2 & 4) | Dev | ⏳ Pending |
| 🔴 CRITICAL | Enable pre-commit hook (link/create) | Dev | ⏳ Pending |
| 🟠 HIGH | Restore debug print detection | Dev | ⏳ Pending |
| 🟠 HIGH | Restore doctest validation | Dev | ⏳ Pending |
| 🟠 HIGH | Restore test gap detection | Dev | ⏳ Pending |
| 🟡 MEDIUM | Improve error messages | Dev | ⏳ Pending |
| 🟡 MEDIUM | Add parallel execution | Dev | ⏳ Pending |

---

## 10. CONCLUSION

**Current State**: Functional but incomplete
- Pre-push hook is **active and working**
- Pre-commit hook is **disabled**
- Missing timeouts could cause hangs
- Some validation features removed (debug prints, doctests, gap detection)

**Risk Level**: MEDIUM
- Push-time validation catches most issues
- But local commits could be broken
- Potential infinite hangs if tests deadlock

**Recommendation**: Implement CRITICAL items (timeouts + pre-commit) within 1 sprint.

