AG Kit is a toolkit that gives Google Antigravity coding agents a structured workspace with rules, skills, specialist agents, workflows, persistent memory, orchestration, MCP guidance, and a safety hook. It is for building and operating agent workflows in Antigravity, and its catalogue entries provide parts of that workspace contract.
Borrowing it
Nothing to install: this file belongs to vudovn/ag-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vudovn/ag-kit/main/CLAUDE.mdgit clone --depth 1 https://github.com/vudovn/ag-kitWrote 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.
[](https://agentmods.dev/instructions/vudovn/ag-kit/claude-md)<a href="https://agentmods.dev/instructions/vudovn/ag-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/vudovn/ag-kit/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/vudovn/ag-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/vudovn/ag-kit/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01069 | $0.01069 |
| Opus 5.5 | $0.00428 | $0.00428 |
| Sonnet 5.5 | $0.00214 | $0.00214 |
| Haiku 4.5 | $0.00107 | $0.00107 |
Grade A, and why
ag-kit CLAUDE.md 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
What this is
AG Kit is an Antigravity-first AI agent engineering kit. The product is the .agents/ workspace contract itself (rules, skills, agents, workflows, memory, hooks) — Markdown + JSON consumed by the Google Antigravity runtime, not compiled code. Three deliverables live in one repo:
.agents/— the toolkit: 20 specialist agents (agent/), ~50 skills (skills/), 13 slash-command workflows (workflows/), 6 rules (rules/), persistent memory templates (memory/), plus the Antigravity runtime layer (antigravity.jsoncontract,hooks.jsonPreToolUse safety gate,hooks/*.mjstooling, JSON schemas).cli/— published npm package@vudovn/ag-kit(Node ≥18, ESM). Installs the kit into user projects viagiget. Entry:cli/bin/index.js, managed-tree logic incli/lib/managed-tree.js.web/— docs site (Next.js 16 + MDX + Tailwind 4, React 19). Content data lives in JSON catalogs underweb/src.
Python ≥3.10 (with PyYAML) runs the toolkit validators; Node ≥22 runs the Antigravity tooling.
Commands
All from repo root unless noted.
# Toolkit (.agents/) — run after ANY change to managed components
npm run generate:agents # regenerate manifest.json, manifest.lock.json, DEPENDENCY_GRAPH.md
npm run check:agents # manifest --check + graph --check + validate_kit.py (what CI runs)
npm run test:toolkit # python -m unittest discover -s .agents/scripts/tests -v
# Antigravity runtime layer
npm run check:antigravity # doctor: validates contract, hooks, schemas
npm run test:antigravity # node --test .agents/hooks/tests/antigravity.test.mjs
npm run build:antigravity-plugin
# CLI
npm run test:cli # or: cd cli && node --test test/*.test.js
node --test cli/test/managed-tree.test.js # single test file
# Web (deps installed per-package: npm ci in cli/ and web/)
npm run lint:web
npm run typecheck:web
npm run build:web # next build --webpack (not turbopack)
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.
- 1mo ago First seen · 66 lines · 1,069 tokens per session scan A 0f35f4b806f1
ag-kit CLAUDE.md is an instructions file published in the GitHub repository vudovn/ag-kit (8,199 stars, last pushed 3d ago), licensed MIT. It adds 1,069 tokens to every session, about $0.0043 per session on Opus 5.5. 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 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.