openapi-to-skills: Instructions file for Claude Code

CLAUDE.md

openapi-to-skills CLAUDE.md is an instructions file for Claude Code from neutree-ai/openapi-to-skills. It costs 621 tokens per session, scanned A, original, Apache-2.0.

Instructions for a command-line tool that converts an OpenAPI specification, a machine-readable description of an API, into Agent Skills: structured Markdown instructions for AI agents. It describes the parser, renderer, templates, writer, and command-line interface.

In plain words
What is it for?
Use it when developing or extending the OpenAPI-to-Skills converter, its TypeScript components, Markdown templates, file output, or command-line commands.
Why use it?
It explains how API definitions become organized agent instructions and where each part of that conversion is implemented.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is neutree-ai/openapi-to-skills's own configuration. It tells Claude Code how to work on openapi-to-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything openapi-to-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to neutree-ai/openapi-to-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/neutree-ai/openapi-to-skills/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/neutree-ai/openapi-to-skills

Made for: Claude Code.

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 openapi-to-skills CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/neutree-ai/openapi-to-skills/claude-md/github.svg)](https://agentmods.dev/instructions/neutree-ai/openapi-to-skills/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/neutree-ai/openapi-to-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/neutree-ai/openapi-to-skills/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.

agentmods 80×15 button for openapi-to-skills CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/neutree-ai/openapi-to-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/neutree-ai/openapi-to-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 621 This file is loaded in full into every session.
When invoked 621 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00621 $0.00621
Opus 5 $0.00311 $0.00311
Sonnet 5 $0.00124 $0.00124
Haiku 4.5 $0.00062 $0.00062

Measured 10d ago against content hash e0b07cab487b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

openapi-to-skills 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 10d 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.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenAPI to Skills

A CLI tool that converts OpenAPI specifications into Agent Skills format - structured markdown documentation optimized for AI agents.

Architecture

OpenAPI Spec (YAML/JSON)
         │
         ▼
┌─────────────────┐
│     Parser      │  ──▶  SkillDocument (IR)
└─────────────────┘
         │
         ▼
┌─────────────────┐
│    Renderer     │  ──▶  Markdown files (via eta templates)
└─────────────────┘
         │
         ▼
┌─────────────────┐
│     Writer      │  ──▶  File system
└─────────────────┘

Core Components

Component File Responsibility
Types src/types.ts All TypeScript interfaces including IR (SkillDocument)
Parser src/parser.ts OpenAPI → IR. Handles filtering, grouping by tags
Renderer src/renderer.ts IR → Markdown via eta templates
Writer src/writer.ts File system abstraction for testability
Converter src/converter.ts Orchestrates Parser → Renderer → Writer
CLI src/cli.ts Command-line interface using citty
Templates templates/*.md.eta Eta templates for markdown generation

Development

Commands

bun install              # Install dependencies
bun test                 # Run all tests (unit + e2e)
bun test src/            # Run unit tests only
bun test e2e/            # Run e2e snapshot tests only
bun run dev              # Run CLI in dev mode
bun run lint             # Check with Biome
bun run lint:fix         # Auto-fix lint issues
bun run snapshot:update  # Regenerate e2e snapshots

Testing Strategy

  • Unit tests: src/*.test.ts - Test Parser, Renderer, Converter in isolation with mocks
  • E2E tests: e2e/snapshot.test.ts - Compare CLI output against expected snapshots
  • Snapshots: examples/input/examples/output/ (both committed to git)

Adding a New E2E Test Case

  1. Add spec to examples/input/{name}.yaml
  2. Run bun run snapshot:update
  3. Commit both input and generated output

Read the full file on GitHub · 74 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. 10d ago First seen · 74 lines · 621 tokens per session scan A e0b07cab487b

Subscribe to this mod's changes

openapi-to-skills CLAUDE.md is an instructions file published in the GitHub repository neutree-ai/openapi-to-skills (340 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 621 tokens to every session, about $0.0031 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 2026-08-30.

Related

Other instructions, from other repositories

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.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

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).

microsoft/vscode · 6,785 tokens

spec-kit AGENTS.md

AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.

github/spec-kit · 7,104 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).

microsoft/vscode · 5,001 tokens

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.

langchain-ai/langchain · 4,469 tokens