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BF api-design-and-evolution

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 planning versioning, deprecation, and migration. Do not use for product discovery, platform operations, full security assessment, ADR authoring, or delivery gates; route those to the neighboring specialist skills.

magnus919/agent-skills Agent Skills author: magnus919 MIT 20 files body ≈ 1 991 tokens Open the sourcegithub.com↗ analyzed 27 h ago

Design, govern, document, review, and evolve consumer-facing APIs and event interfaces.

As a process F 52/100 · Will not run — References files that are not bundled: ../adr-authoring/SKILL.md, ../product-discovery/SKILL.md, ../secure-software-engineering/SKILL.md

IntegrationInfrastructuretype and topics are labelled automatically from the skill text
Runs in: Claude / Claude Code ChatGPT / Codex Gemini CLI Cursor GitHub Copilot / VS Code Qwen Code Kimi Code CLI Z.ai (GLM) DeepSeek (Deep Code) Mistral Vibe LangChain (deepagents) OpenClaw Goose OpenCode
JSON
Technical rating
B
91/100
safety, quality, tests
Safety 60%
100
Quality 40%
77
Run on models
none yet
Process rating
F
52/100
Will not run
References files that are not bundled: ../adr-authoring/SKILL.md, ../product-discovery/SKILL.md, ../secure-software-engineering/SKILL.md
Tools and files w 18
0
Result and completion w 14
0
Inputs and preconditions w 11
0
the three weakest of ten parameters · all ten

How to improve

  1. The text references files that are not there: add them or drop the references.
For the model run — optional
  • A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.

Guard findings · 0

✓ No critical or high findings

Files scanned: 19. Evidence is masked. Grey chips explain why severity was lowered.

Against the Agent Skills spec

  • warning missing-ref reference to a missing file: ../adr-authoring/SKILL.md
  • warning missing-ref reference to a missing file: ../product-discovery/SKILL.md
  • warning missing-ref reference to a missing file: ../secure-software-engineering/SKILL.md
  • warning missing-ref reference to a missing file: ../verification-methodology/SKILL.md
  • warning missing-ref reference to a missing file: ../release-engineering/SKILL.md

Process rating: all ten parameters 52/100

Will not run. References files that are not bundled: ../adr-authoring/SKILL.md, ../product-discovery/SKILL.md, ../secure-software-engineering/SKILL.md
  • 0Tools and files. 5 referenced file(s) missing: ../adr-authoring/SKILL.md, ../product-discovery/SKILL.md, ../secure-software-engineering/SKILL.md
  • 0Result and completion. Does not say what the result is
  • 0Inputs and preconditions. Does not say what the process needs to start
  • 0Progress reporting. Says nothing while it works
  • 30Running it twice. 5 mutating operations with no state check
  • 100Steps. 12 steps
  • 100When it triggers. States when to use and when not to
  • 100Failures and branches. 1 branches, has a failure section
  • 100Consistency. Name and required fields are in place
  • 100Execution cost. Instruction body is 1991 tokens
  • medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing
  • low No test case covers injection arriving through data

Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.

Quality signals

  • +5Description has no quoted example phrases that should trigger the skill
  • +3Output format is not stated: the model decides each time
  • +4No input/output examples
  • +2Single-language instructions
  • +4Description says when NOT to use the skill
  • +3Description length 705: enough signal without eating the budget
  • +4Structure: 8 headings
  • +3Step-by-step instructions: 12 items
  • +4Reference files are cited in the instructions (10 of 10)
  • +1License stated

Quality base 70; lint remarks subtract, signals add up to 100. Result: 77.