onboard

onboard is a skill for Claude Code, Codex from viknesh20-20/claude-code-tool-kit. It costs 40 tokens per session (784 once invoked), scanned A, original, MIT.

A codebase guide generator that examines a project's files, tools, history, and structure. It explains how the project is organized and where important code starts running.

In plain words
What is it for?
It helps prepare onboarding documents covering the project purpose, programming languages, frameworks, databases, tests, build tools, contributors, and key entry points.
Why use it?
It reduces the time new developers spend figuring out an unfamiliar project and its technology choices.

Skill for Claude CodeCodex

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 skills/viknesh20-20/claude-code-tool-kit/onboard
Any agent
npx skills add viknesh20-20/claude-code-tool-kit --skill onboard
Clone the repo
git clone --depth 1 https://github.com/viknesh20-20/claude-code-tool-kit

Made for: Claude Code, Codex.

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 onboard

README.md
[![agentmods](https://agentmods.dev/badge/skills/viknesh20-20/claude-code-tool-kit/onboard.svg)](https://agentmods.dev/skills/viknesh20-20/claude-code-tool-kit/onboard)
Your own site
<a href="https://agentmods.dev/skills/viknesh20-20/claude-code-tool-kit/onboard"><img src="https://agentmods.dev/badge/skills/viknesh20-20/claude-code-tool-kit/onboard.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 784 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 $0.00040 $0.00784
Opus 5 $0.00020 $0.00392
Sonnet 5 $0.00008 $0.00157
Haiku 4.5 $0.00004 $0.00078

Measured 4d ago against content hash 085e7de3e7f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

onboard 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.

.claude/skills/onboard/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Codebase Onboarding

Auto-Scan

!find . -type f -not -path "*/node_modules/*" -not -path "*/.git/*" -not -path "*/vendor/*" -not -path "*/__pycache__/*" -not -path "*/target/*" -not -path "*/dist/*" -not -path "*/build/*" -not -path "*/.next/*" 2>/dev/null | wc -l

Project Files

!ls package.json requirements.txt pyproject.toml go.mod Cargo.toml *.csproj *.sln Gemfile composer.json mix.exs Makefile Dockerfile docker-compose* 2>/dev/null

Directory Structure

!tree -L 2 -I "node_modules|.git|vendor|__pycache__|target|dist|build|.next" 2>/dev/null || find . -type d -maxdepth 2 -not -path "*/node_modules/*" -not -path "*/.git/*" 2>/dev/null

README

!cat README.md 2>/dev/null | head -50

Git Activity

!git log --oneline -20 2>/dev/null !git shortlog -sn --no-merges 2>/dev/null | head -10


Onboarding Guide Generation

Section 1: Project Overview

  • What this project does (from README + code analysis)
  • Who maintains it (from git history)
  • How active it is (recent commits, contributors)

Section 2: Tech Stack

Detect and document:

  • Language(s) and version(s)
  • Framework(s)
  • Database(s)
  • Package manager
  • Test framework
  • Build tools
  • CI/CD system

Section 3: Directory Map

Annotated directory tree:

src/
├── components/   # UI components
├── services/     # Business logic
├── utils/        # Shared utilities
├── types/        # Type definitions
└── config/       # Configuration

Section 4: Key Entry Points

  • Application entry point (main file, index, app)
  • API routes / endpoints
  • Database schema / models
  • Configuration files
  • Environment variables needed

Section 5: How to Run

  • Prerequisites (runtime versions, tools)
  • Installation steps
  • Development server command
  • Test command
  • Build command

Section 6: Architecture Patterns

  • Code organization pattern (MVC, hexagonal, feature-based, etc.)
  • State management approach
  • Data flow (request lifecycle)
  • Error handling strategy
  • Authentication/authorization approach

Read the full file on GitHub · 93 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 · 93 lines · 40 tokens per session scan A 085e7de3e7f8

Subscribe to this mod's changes

onboard is a skill published in the GitHub repository viknesh20-20/claude-code-tool-kit (7 stars, last pushed 4mo ago), licensed MIT. It adds 40 tokens to every session and 784 once invoked, about $0.0002 per session on Opus 5. 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.

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