api-design-and-evolution SKILL.md skillA
api-design-and-evolution from magnus919/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add magnus919/agent-skills/api-design-and-evolution@git:20261004.affec9dPins git:20261004.affec9d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- magnus919/agent-skills
- Path
api-design-and-evolution/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261004.affec9d, committed Oct 4, 2026
- First version recorded
- Jul 13, 2026
- Size
- 9,394 bytes
- Repository stars
- 166
- License
- MIT
Design, govern, document, review, and evolve consumer-facing APIs and event interfaces. Use when choosing REST/HTTP, GraphQL, RPC, events, webhooks, or streaming; writing OpenAPI or AsyncAPI contracts; assessing an API landscape, ownership, duplication, lifecycle, discoverability, retirement, gateways, service meshes, north-south or east-west traffic, routing, policy, observability, or failure boundaries; defining schemas, pagination, mutations, errors, idempotency, or compatibility; or…
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 Design And Evolution Design an interface as a durable agreement with its consumers, not a route list. Start with the consumer job, domain meaning, authority boundary, and failure modes; then choose the interface style and contract format. Keep facts, assumptions, and policy decisions distinguishable. ## When to use Use for a new or changed REST/HTTP API, GraphQL schema, RPC operation, event or message contract, webhook, or streaming interface. Use it before implementation and again whenever consumer-visible behavior changes. ## When not to use Do not use this as an ADR template, a complete product-discovery method, a security assessment, or an implementation test plan. Hand those concerns to [adr-authoring](../adr-authoring/SKILL.md), [product-discovery](../product-discovery/SKILL.md), [secure-software-engineering](../secure-software-engineering/SKILL.md), and [verification-methodology](../verification-methodology/SKILL.md), respectively. ## Workflow 1. **Classify the scope.** If the request spans more than one interface, start [templates/api-landscape-assessment.md](templates/api-landscape-assessment.md) and …
Read the whole file at its exact version.
How to install
mdr add magnus919/agent-skills/api-design-and-evolution@sha256:92fa87bbef188de5The line at the top of this page pins the label git:20261004.affec9d, 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_pskflqmshg3hghrd)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Jul 13, 2026 and Oct 4, 2026, about one every 28 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261004.affec9d latest | 2026-10-04 | affec9d | 9,394 B | A | view · diff |
| git:20260821.cc0274f | 2026-08-21 | cc0274f | 8,885 B | A | view · diff |
| git:20260802.c5fd9c9 | 2026-08-02 | c5fd9c9 | 6,568 B | A | view · diff |
| git:20260713.24f0f0e | 2026-07-13 | 24f0f0e | 6,345 B | A | view |
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 (9394 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
magnus919/agent-skills · 166 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pskflqmshg3hghrd GET https://markdownregistry.com/api/v1/resolve?ref=magnus919/agent-skills/api-design-and-evolution GET https://markdownregistry.com/api/v1/blob/92fa87bbef188de5cfa6c5486b39de1d8f456c875adce169f1a2e45674beb571
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.