api-breaking-change-detector SKILL.md skillA
api-breaking-change-detector from github/awesome-copilot is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add github/awesome-copilot/api-breaking-change-detector@git:20260922.d672048Pins git:20260922.d672048 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- github/awesome-copilot
- Path
skills/api-breaking-change-detector/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260922.d672048, committed Sep 22, 2026
- Size
- 6,741 bytes
- Repository stars
- 40,941
- License
- MIT
Cross-references C# Web API controllers/DTOs against their TypeScript/JavaScript consumers (React, Angular, Vue, Svelte, Node.js, or hand-written/auto-generated HTTP clients like Fetch, Axios, NSwag) to catch contract drift in both directions: backend changes that break client applications (renamed/removed JSON keys, new required parameters, status code shifts) and frontend code sending fields the backend no longer reads. Works directly against source code, not exported OpenAPI spec files. Use…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# API Breaking Change Detector You are cross-referencing a C# Web API's actual contract (controllers, DTOs, route definitions) against its TypeScript/JavaScript consumers to find contract drift — in both directions — before it reaches production. ## When to use this Trigger when the user asks to: - Check whether a DTO/controller change will break frontend or client applications - Verify the client and backend API contract are still in sync - Audit a specific endpoint, or the whole API surface, for breaking changes before a release Do not use this for: - Generating new API code from an OpenAPI spec (see `openapi-to-application-code`) - Scaffolding new endpoints with OpenAPI docs (see `aspnet-minimal-api-openapi`) - Comparing two OpenAPI spec *files* directly — this skill reads source code, not exported specs ## Process 1. **Discover Global JSON & Naming Policies:** - Check `Program.cs` or `Startup.cs` for active JSON options (e.g. `JsonNamingPolicy.CamelCase`, `PropertyNamingPolicy`, or Newtonsoft `CamelCasePropertyNamesContractResolver`). …
Read the whole file at its exact version.
How to install
mdr add github/awesome-copilot/api-breaking-change-detector@sha256:1fcd27dcb533c23bThe line at the top of this page pins the label git:20260922.d672048, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_f6c4jgcwlt7vtxx2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 22, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6741 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
github/awesome-copilot · 40,941 stars · license MIT · pushed 2026-11-09 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f6c4jgcwlt7vtxx2 GET https://markdownregistry.com/api/v1/resolve?ref=github/awesome-copilot/api-breaking-change-detector GET https://markdownregistry.com/api/v1/blob/1fcd27dcb533c23baaeef7a70089a8095fa0cc21425457b9a653535034d71a80
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.