repository-onboarding

A command that creates a complete guide for learning an unfamiliar code repository. A repository is the project’s files, code history, and documentation.

In plain words
What is it for?
It helps identify entry points, explain major components and system flows, map dependencies, find existing documentation, and create progressive walkthroughs and exercises.
Why use it?
It turns a large codebase into a structured learning path instead of requiring a new developer to discover every component and relationship alone.

Command for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/diffbot/mcp-code-graph/repository-onboarding
Clone the repo
git clone --depth 1 https://github.com/diffbot/mcp-code-graph

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 170 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00170
Opus 5 $0.00000 $0.00085
Sonnet 5 $0.00000 $0.00034
Haiku 4.5 $0.00000 $0.00017

Measured 2d ago against content hash cb051fc492c4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

repository-onboarding scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/commands/repository-onboarding.md · 19 lines

What it actually says

Complete Repository Onboarding

Generate comprehensive onboarding guide for the entire repository.

This command creates complete onboarding materials by:

  1. Identifying all key components and entry points
  2. Mapping learning paths based on system architecture
  3. Generating progressive code walkthroughs
  4. Creating hands-on exercises for each major component
  5. Providing complete system understanding

Follow these steps:

  1. Use nodes-semantic-search to find main application components and entry points
  2. Get implementation details with get-code for key components
  3. Map learning dependencies with get-usage-dependency-links
  4. Find logical system flow with find-direct-connections
  5. Search for all existing documentation with docs-semantic-search
  6. Generate structured repository onboarding guide with progressive complexity

This command is ideal for: new developer onboarding, complete system understanding, and comprehensive training.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 19 lines · 0 tokens per session scan A cb051fc492c4

Subscribe to this mod's changes

repository-onboarding is a command published in the GitHub repository diffbot/mcp-code-graph (402 stars, last pushed 9mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 170 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.