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    🛡️OpenAPI Contract Guard

    1

    OpenAPI Contract Guard is a specialized developer tool designed to catch breaking changes and linting violations in your API specifications before they reach production.

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    🛡️OpenAPI Contract Guard

    🛡️OpenAPI Contract Guard

    Example session with this skill installed

    Check schema/v1.json and schema/v2.json for breaking changes and lint errors.

    • Read your context and instructions
    • Compiled the openapi contract guard
    • Generated the UI component

    API Contract Audit

    [BREAKING] OAS-DIFF-001: Removed property user_id from User schema.
    [WARNING] OAS-LINT-024: Missing description for GET /orders.

    Remediation: Restore user_id or mark as deprecated if transitioning to uuid.

    openapi-contract-guard.tsx

    TSX · React component

    Generated

    Example file from a real run - the skill writes it into your workspace.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Identify breaking changes between two versions of an OpenAPI specAudit Swagger files for missing documentation and style violationsPrevent deployment of APIs that would break downstream client appsGenerate remediation guides for API schema inconsistencies

    About this skill

    What it does

    OpenAPI Contract Guard is a specialized developer tool designed to catch breaking changes and linting violations in your API specifications before they reach production. It analyzes OpenAPI and Swagger files to identify risks that could impact downstream consumers, such as removed endpoints, modified property types, or missing documentation.

    Why use this skill

    Manual API reviews are error-prone and time-consuming. This skill automates the detection of "silent breakages" that simple linters often miss. It provides a structured heuristic analysis of the differences between two versions of a spec, ensuring your team maintains strict backward compatibility. By integrating this into your workflow, you prevent broken client integrations and reduce the overhead of manual contract testing.

    • Automated Breaking Change Detection: Instantly identifies removals or modifications of existing endpoints and fields.
    • Comprehensive Linting: Surfaces style and structural issues following best practices.
    • Remediation Guidance: Every finding includes technical evidence and specific steps to fix the issue.
    • Format Agnostic: While the core scanner processes JSON, the skill handles YAML-to-JSON conversion seamlessly.

    Supported tools

    Supports OpenAPI 3.x and Swagger 2.0 specifications in both JSON and YAML formats. It uses a custom Python-based heuristic engine for deep diff analysis.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

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    Fresh listing

    Recently published to Agensi

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    Trust & safety

    Security scanned

    Verified clean 3 months ago

    • Passed all security checks, Safe to install

    Listed3 months ago

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