handbook

handbook is a command for coding agents from ruizrica/toolkit. It costs 0 tokens per session (694 once invoked), scanned A, original, MIT.

A command that analyses a code project and writes a structured handbook describing what it does, how it is organised, how parts communicate, and where it can be extended.

In plain words
What is it for?
Creating project documentation in a HANDBOOK.md file, with sections covering the system overview, modules, data flow, integrations, configuration, and extension points.
Why use it?
It reduces the time needed for an AI assistant or developer to understand an unfamiliar codebase before making changes.

Command

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/ruizrica/toolkit/handbook
Clone the repo
git clone --depth 1 https://github.com/ruizrica/toolkit

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for handbook

README.md
[![agentmods](https://agentmods.dev/badge/commands/ruizrica/toolkit/handbook.svg)](https://agentmods.dev/commands/ruizrica/toolkit/handbook)
Your own site
<a href="https://agentmods.dev/commands/ruizrica/toolkit/handbook"><img src="https://agentmods.dev/badge/commands/ruizrica/toolkit/handbook.svg" alt="Measured on agentmods" height="20"></a>
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 694 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 $0.00694
Opus 5 $0.00000 $0.00347
Sonnet 5 $0.00000 $0.00139
Haiku 4.5 $0.00000 $0.00069

Measured 4d ago against content hash 4f32bd8eb7ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

handbook 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 4d 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.

docs/commands/handbook.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/handbook

Generate a comprehensive, AI-optimized project handbook. This command analyzes your codebase and creates structured documentation designed to help AI assistants understand and work with your project.

Usage

/handbook [--path PROJECT_PATH] [--output FILENAME] [--verbose]

Arguments

Argument Required Default Description
--path No . Path to the project to analyze
--output No HANDBOOK.md Output filename
--verbose No false Show detailed analysis progress

Output Structure

The handbook is organized into four layers:

Layer 1: System Overview

  • Purpose - What the project does and why it exists
  • Tech Stack - Languages, frameworks, and tools used
  • Architecture - High-level system design

Layer 2: Module Map

  • Core Modules - Primary functionality areas
  • Data Layer - Database, storage, and data flow
  • Utilities - Helper functions and shared code

Layer 3: Integration Guide

  • APIs - External and internal API documentation
  • Interfaces - How components communicate
  • Configuration - Settings and environment variables

Layer 4: Extension Points

  • Design Patterns - Patterns used throughout the codebase
  • Customization Areas - Where and how to extend functionality

Examples

# Generate handbook for current project
/handbook

# Analyze a specific project
/handbook --path ./my-project

# Custom output file
/handbook --output PROJECT_DOCS.md

# Full options
/handbook --path ./api --output API_HANDBOOK.md --verbose

Sample Output

# Project Handbook: MyApp

## Layer 1: System Overview

### Purpose
MyApp is a task management application that enables teams to...

### Tech Stack
- **Frontend**: React 18, TypeScript, Tailwind CSS
- **Backend**: Node.js, Express, PostgreSQL
- **Infrastructure**: Docker, AWS Lambda

### Architecture
The application follows a microservices architecture with...

## Layer 2: Module Map

### Core Modules
- `src/auth/` - Authentication and authorization
- `src/tasks/` - Task CRUD operations
- `src/teams/` - Team management

...

Read the full file on GitHub · 115 lines

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. 4d ago First seen · 115 lines · 0 tokens per session scan A 4f32bd8eb7ab

Subscribe to this mod's changes

handbook is a command published in the GitHub repository ruizrica/toolkit (5 stars, last pushed 19d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 694 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 2026-08-31.