Kubb is a modular code-generation framework that turns OpenAPI descriptions into type-safe TypeScript code, Zod schemas, and TanStack Query integrations. It is used by TypeScript developers to generate client code and related interfaces from API specifications. The catalogue contains extensions such as skills, commands, hooks, agents, and a plugin that support Kubb workflows.
Borrowing it
Nothing to install: this file belongs to kubb-labs/kubb. 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/kubb-labs/kubb/main/AGENTS.mdgit clone --depth 1 https://github.com/kubb-labs/kubbWrote 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/kubb-labs/kubb/agents-md)<a href="https://agentmods.dev/instructions/kubb-labs/kubb/agents-md"><img src="https://agentmods.dev/badge/instructions/kubb-labs/kubb/agents-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/kubb-labs/kubb/agents-md"><img src="https://agentmods.dev/badge/instructions/kubb-labs/kubb/agents-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 | $0.01232 | $0.01232 |
| Opus 5.5 | $0.00493 | $0.00493 |
| Sonnet 5.5 | $0.00246 | $0.00246 |
| Haiku 4.5 | $0.00123 | $0.00123 |
Grade A, and why
kubb AGENTS.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 7d 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 — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Kubb is a code-generation toolkit for generating TypeScript, React-Query, Zod, Faker.js, MSW and more from OpenAPI specifications. It uses a plugin-based architecture with an Abstract Syntax Tree (AST) layer.
High-level architecture
Kubb is built from:
- Core engine (
@kubb/core) runs the plugin system and orchestrates code generation - Authoring kit (
@kubb/kit, reached through thekubb/kitsubpath) bundles the helpers for building plugins, generators, adapters, resolvers, and renderers - Adapters (
@kubb/adapter-oas) transform OpenAPI specs into an AST - Renderers and utilities turn the AST into code
- The CLI is the entry point for code generation
- MCP server adds Model Context Protocol integration for AI assistants
Project structure and commands
The full folder structure, repository setup, and commands live in CONTRIBUTING.md.
Repository setup
| Aspect | Choice |
|---|---|
| Monorepo | pnpm workspaces + Turborepo |
| Module system | ESM-only (type: "module") |
| Node version | 22 |
| Package manager | pnpm 11+ |
| Linter | oxlint |
| Formatter | oxfmt |
| Bundler | tsdown |
| Tests | Vitest |
| Versioning | Changesets |
| CI/CD | GitHub Actions |
Plugin ecosystem
Plugins are maintained in a separate monorepo at kubb-labs/plugins. Each extension ships its metadata in kubb-extension.json and its docs in packages/<name>/docs/. The registry reads both from the npm tarball, and kubb.dev renders them at /extensions/kubb-labs/<name>.
docs/overview.mdis required.docs/options.mdanddocs/guides/<id>.mdare optional.- Every file starts with a
# Titleline. The paragraph after it is the description. Use no frontmatter or raw HTML, and write links as absolutehttps://URLs. overview.mdhas no install commands. kubb.dev renders installation and dependencies from the manifest.
When an extension's options change here, update its docs/options.md in the same PR.
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.
- 7d ago Changed · +15 lines · +351 tokens per session 9dd01ed6f0c7
- 11d ago Changed · +11 lines · +317 tokens per session 24be1638d45d
- 18d ago Changed · -6 lines · -9 tokens per session 15466b93df25
- 21d ago Changed · -20 lines · -123 tokens per session 0b2582c67159
- 29d ago Changed · -7 lines · -380 tokens per session 3d4c29dd1758
- 1mo ago Changed · +51 tokens per session 2a313bd6b479
- 1mo ago First seen · 80 lines · 1,025 tokens per session scan A 15802634657e
kubb AGENTS.md is an instructions file published in the GitHub repository kubb-labs/kubb (1,825 stars, last pushed today), licensed MIT. It adds 1,232 tokens to every session, about $0.0049 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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.