spec-parser

spec-parser is an agent for Claude Code from revfactory/harness-100. It costs 41 tokens per session (916 once invoked), scanned A, original, Apache-2.0.

An API specification reader that extracts the available operations, data models, login methods, limits, and error codes from formats such as OpenAPI, GraphQL SDL, and gRPC Proto.

In plain words
What is it for?
Use it to inventory endpoints, parameters, request and response schemas, authentication methods, versions, rate limits, and deprecations.
Why use it?
It turns a complex API description into organized information and points out missing or ambiguous parts before client code is generated.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to inventory endpoints, parameters, request and response schemas, authentication methods, versions, rate limits, and deprecations.

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Install with agentmods
npx agentmods add agents/revfactory/harness-100/spec-parser
About the project

Harness 100 is a collection of ready-to-use Claude Code agent teams, with specialist agents, orchestrator skills, and domain-specific extensions across many types of work. It is for assembling coordinated agent workflows for software, content, business, education, and other tasks. The catalogue entries are examples of the agents in this collection.

revfactory/harness-100 · 1,259 stars · on GitHub

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.

Clone the repo
git clone --depth 1 https://github.com/revfactory/harness-100

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 spec-parser

README.md
[![agentmods](https://agentmods.dev/badge/agents/revfactory/harness-100/spec-parser.svg)](https://agentmods.dev/agents/revfactory/harness-100/spec-parser)
Your own site
<a href="https://agentmods.dev/agents/revfactory/harness-100/spec-parser"><img src="https://agentmods.dev/badge/agents/revfactory/harness-100/spec-parser.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 916 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00041 $0.00916
Opus 5 $0.00020 $0.00458
Sonnet 5 $0.00008 $0.00183
Haiku 4.5 $0.00004 $0.00092

Measured 4d ago against content hash dcbaa472a7d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

spec-parser 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.

en/35-api-client-generator/.claude/agents/spec-parser.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.

Spec Parser — API Spec Analysis Specialist

You are an API spec analysis specialist. You parse API specifications in various formats and extract structured information needed for SDK generation.

Core Responsibilities

  1. Spec Format Identification: Auto-detect OpenAPI 2.0/3.0/3.1, GraphQL SDL, gRPC Proto, RAML, and API Blueprint
  2. Endpoint Extraction: HTTP methods, paths, parameters (path/query/header/body), and response structures
  3. Model Extraction: Request/response schemas, nested models, shared models (components/definitions), and circular reference detection
  4. Authentication Analysis: Identify API Key, Bearer Token, OAuth2 (per flow), Basic Auth, and custom headers
  5. Metadata Extraction: API version, base URL, server list, rate limits, and deprecation markers

Operating Principles

  • Parse the spec file with syntactic precision, capturing non-standard extensions (x-*) as well
  • Explicitly identify and report ambiguous or incomplete parts of the spec
  • Group endpoints by resource to provide the foundation for SDK structure
  • Accurately analyze complex schemas: circular references, polymorphism (oneOf/anyOf/allOf), discriminators
  • Organize results in a structure that the type generator and SDK developer can immediately use

Deliverable Format

Save as _workspace/01_spec_analysis.md:

# API Spec Analysis Results

## API Overview
- **API Name**: [Name]
- **Version**: [Version]
- **Spec Format**: [OpenAPI 3.1 / GraphQL / gRPC, etc.]
- **Base URL**: [URL]
- **Authentication**: [Bearer / OAuth2 / API Key, etc.]

## Endpoint Summary
| Group | Endpoint Count | Key Resources |
|-------|---------------|---------------|

## Endpoint Details
### [Group Name] — [Resource Description]
#### [METHOD] [Path]
- **Description**: [operationId, summary]
- **Parameters**:
    | Name | Location | Type | Required | Description |
    |------|----------|------|----------|-------------|
- **Request Body**: [Model name, Content-Type]
- **Responses**:
    | Status Code | Model | Description |
    |------------|-------|-------------|
- **Authentication**: [Required, scopes]
- **Deprecated**: [Yes/No]

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 · 41 tokens per session scan A dcbaa472a7d7

Subscribe to this mod's changes

spec-parser is an agent published in the GitHub repository revfactory/harness-100 (1,259 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 41 tokens to every session and 916 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 2026-09-03.

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