tools-repo-review

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---
name: tools-repo-review
description: Comprehensive GitHub repository analysis for engineering managers with contribution stats, code quality review, team health metrics, and actionable management outputs
---

# Repo Review Skill (Engineering Manager Edition)

This skill enables AI-powered repository analysis with three modes: contribution statistics, code quality assessment, and team/manager insights. Supports org-wide reviews, single repos, and saved repo groups.

## Prerequisites

- Git CLI installed
- GitHub CLI (`gh`) for org-wide reviews
- Optional: Python 3.10+ with matplotlib for PNG chart generation

## Quick Start

```
Review https://github.com/org/repo
Review the UP organization
Review my side-projects group
```

## Progressive Onboarding

On first use, gather context through conversation:

### Initial Questions
1. **Role**: Engineering Manager | Tech Lead | IC
2. **Focus**: Full review | Quick stats | Code quality only
3. **Time period**: 30 days | 90 days | YTD | Custom

Save preferences to `config.yaml` for future sessions.

### Follow-up Questions (as needed)
- "I found 5 contributors. Focus on anyone specific?"
- "Compare against previous review?"
- "Flag contributors with < X commits?"

---

## Analysis Modes

### Mode 1: Contribution Statistics

Gather quantitative metrics using git commands:

```bash
# Clone repo to temp directory
git clone --quiet <repo_url> /tmp/repo_review_temp

# Contribution stats by author
git log --numstat --format="COMMIT|%H|%an|%ad" --date=short --since="2025-01-01" --all

# Weekly breakdown
git log --format="%ad" --date=short --since="2025-01-01" | sort | uniq -c

# Files touched by author
git log --author="Name" --name-only --pretty=format: | sort | uniq -c | sort -rn

# File type breakdown
git log --numstat --format="" | awk '{print $3}' | grep -oE '\.[^.]+$' | sort | uniq -c | sort -rn
```

**Output metrics:**
- Commits per author
- Lines added/deleted/net per author
- File type breakdown (frontend/backend/config/infra/docs)
- Weekly/monthly activity patterns

### Mode 2: Code Quality Review

Examine the codebase for:

**Architecture & Patterns**
- Project structure organization
- Component/module boundaries
- DRY compliance
- Separation of concerns

**Type Safety**
- TypeScript strictness
- `any` usage
- Proper type exports

**Error Handling**
- Try/catch patterns
- Error boundaries
- Validation at boundaries

**Database/API Patterns**
- Query structure
- N+1 detection
- Input validation

**Security**
- Auth implementation
- Secret handling
- Input sanitization

**Testing Indicators**
- Test file presence
- Coverage indicators
- Test patterns

### Mode 3: Team/Manager Assessment

Combine quantitative data with qualitative code review:

**Per-Contributor Analysis:**
- Volume and consistency
- Scope of work (full-stack vs narrow)
- Quality signals
- Growth indicators

**Team Health:**
- Bus factor
- Knowledge silos
- Cross-functional work
- Velocity trends

---

## Review Targets

### 1. Single Repository

```
Review https://github.com/org/repo
Review https://github.com/org/repo --since 2025-06-01
```

### 2. Organization-Wide

```
Review the UP organization
Review all repos in UP org
```

Uses GitHub CLI:
```bash
gh repo list UP --limit 100 --json name,sshUrl,url
```

### 3. Saved Groups

```
Review my side-projects group
Review client-work group
```

### 4. Managing Groups

```
Add https://github.com/user/repo to side-projects
Create a new group called "experiments"
Remove old-project from experiments
Show all my saved groups
```

---

## Visualization Options

### Mermaid Diagrams (for markdown reports)

**Contribution Timeline:**
```mermaid
gantt
    title Contribution Timeline
    dateFormat YYYY-MM-DD
    section Contributor1
    Feature A     :2025-12-30, 2d
    Feature B     :2026-01-02, 1d
    section Contributor2
    Bug Fix       :2026-01-01, 1d
```

**Work Breakdown:**
```mermaid
pie title Work Breakdown
    "Frontend" : 45
    "Backend" : 30
    "Config" : 15