Repo Analysis

Repo Analysis

Overview

A structured workflow for turning a cloned codebase into an actionable analysis. The goal is to extract transferable knowledge — patterns, techniques, and ideas — not just describe what the code does.

When to Use

• You just cloned a repo from GitHub that looks interesting
• You want to understand how a project is architected before adopting its patterns
• You need to compare a reference implementation to your current approach
• You're evaluating whether to adopt a library or framework used in the repo

Workflow

0. Pre-flight

Before starting, confirm:

- Repo is cloned to: ~/references/{repo-name}/
- analysis.md does NOT already exist (or needs refresh)

If not cloned yet:

git clone https://github.com/{owner}/{repo} ~/references/{repo-name}

Step 1 — Stack Identification (5 min)

Collect the essentials without reading code yet:

# Language breakdown
find ~/references/{repo-name} -type f | grep -E "\.(py|ts|go|rs|java|rb|kt)$" | sed 's/.*\.//' | sort | uniq -c | sort -rn

# Dependency manifest
cat ~/references/{repo-name}/requirements.txt 2>/dev/null
cat ~/references/{repo-name}/pyproject.toml 2>/dev/null
cat ~/references/{repo-name}/package.json 2>/dev/null | python3 -c "import sys,json; d=json.load(sys.stdin); print('\n'.join(list(d.get('dependencies',{}).keys())[:20]))"

# CI/CD and infra
ls ~/references/{repo-name}/.github/workflows/ 2>/dev/null
cat ~/references/{repo-name}/Dockerfile 2>/dev/null | head -20
cat ~/references/{repo-name}/docker-compose.yml 2>/dev/null | head -30

Fill in: Tech Stack table in analysis.md

Step 2 — Architecture Overview (10 min)

Understand the shape before diving into code:

# Top-level structure
ls ~/references/{repo-name}/src/ 2>/dev/null || ls ~/references/{repo-name}/app/ 2>/dev/null || ls ~/references/{repo-name}/

# Module count and size
find ~/references/{repo-name} -name "*.py" -not -path "*/.git/*" | head -30

Questions to answer:

• What are the top-level modules and their single responsibility?
• Where does data enter the system? Where does it exit?
• What's the test structure? (mirrors source? separate?)
• Is there a clear separation of concerns?

Fill in: Architecture Overview section

Step 3 — Pattern Extraction (15 min)

Read the most interesting parts — not everything. Focus on:

1. Entry points — main files, routers, CLI definitions
2. Core domain logic — the non-trivial business logic
3. Infrastructure adapters — how they wire up databases, APIs, external services
4. Tests — what the test strategy reveals about the design

For each notable pattern:

Name:       Short descriptive name
File:       ~/references/{repo-name}/path/to/file.py
Lines:      L{start}-{end}
What:       What problem this solves
Why novel:  Why this is worth noting
Snippet:    (paste key 5-15 lines)
Adopt?:     Yes / Adapted / No

Fill in: Key Patterns section

Step 4 — Assessment (5 min)

Be opinionated. Rate each dimension:

Fill in: Strengths + Weaknesses sections

Step 5 — Adoption Planning (5 min)

Convert findings into concrete actions:

For each pattern worth adopting:
  □ WHAT to adopt (be specific — not "their architecture", but "their repository pattern")
  □ WHERE to apply it in my system
  □ HOW HARD (drop-in / light adaptation / significant rework)
  □ PRIORITY (high / medium / backlog)

Fill in: "What to Adopt" section

Step 6 — Save and Extract

# Save analysis (should already be at ~/references/{repo-name}/analysis.md)
# Then extract to knowledge base:
# "Use the context-curator agent to extract ~/references/{repo-name}/analysis.md"

Output Checklist

• Tech stack fully documented
• Architecture flow described
• ≥ 3 patterns extracted with code snippets
• Strengths and weaknesses are specific (not generic)
• Adoption items are actionable with clear "where" and "how"
• context-curator run to extract to KB

Tips

• Don't read everything — skim for the interesting 20%
• Focus on what's different from your current approach
• Patterns > implementations — you want the idea, not the code verbatim
• Use repo-analyst agent for automated analysis generation