openapi-spec-generation

openapi-spec-generation is a skill for Claude Code, Codex from sileo-oss/agentflow-community. It costs 42 tokens per session (5,927 once invoked), scanned A, original, ODbL-1.0.

A tool for creating and maintaining OpenAPI 3.1 specifications, which are structured descriptions of how a web API works, from code or design documents.

In plain words
What is it for?
Use it when documenting an API, starting with an API design, generating client libraries, or validating that an implementation matches its specification.
Why use it?
It helps keep API documentation and the agreed interface between clients and servers consistent. It can also support SDK generation and checking whether code follows the API contract.

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/sileo-oss/agentflow-community/openapi-spec-generation
Any agent
npx skills add sileo-oss/agentflow-community --skill openapi-spec-generation
Clone the repo
git clone --depth 1 https://github.com/sileo-oss/agentflow-community

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 openapi-spec-generation

README.md
[![agentmods](https://agentmods.dev/badge/skills/sileo-oss/agentflow-community/openapi-spec-generation.svg)](https://agentmods.dev/skills/sileo-oss/agentflow-community/openapi-spec-generation)
Your own site
<a href="https://agentmods.dev/skills/sileo-oss/agentflow-community/openapi-spec-generation"><img src="https://agentmods.dev/badge/skills/sileo-oss/agentflow-community/openapi-spec-generation.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,927 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00042 $0.05927
Opus 5 $0.00021 $0.02964
Sonnet 5 $0.00008 $0.01185
Haiku 4.5 $0.00004 $0.00593

Measured 4d ago against content hash 1118b4b95405, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openapi-spec-generation scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- lang: curl
collections/4f450d0f-0a72-47a5-8ec8-fc8fefd469ae/skills/openapi-spec-generation/SKILL.md · 1,027 lines

The source is not reproduced here

Licensed ODbL-1.0

The repository is licensed ODbL-1.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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 · 1,027 lines · 42 tokens per session scan A 1118b4b95405

Subscribe to this mod's changes

openapi-spec-generation is a skill published in the GitHub repository sileo-oss/agentflow-community (2 stars, last pushed 5mo ago), licensed ODbL-1.0. It adds 42 tokens to every session and 5,927 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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