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API Design Reviewer · borghei | DecimalAI

code reviewby borghei

API Design Reviewer

borghei/api-design-reviewer

Source borghei/claude-skills ↗License NOASSERTION

Review REST API designs for quality, consistency, and breaking changes. Lints OpenAPI specs, generates scorecards, and detects breaking changes between versions.

SkillScore82Maintained

Automatic

Coding pack

Last verified 8/20/2026

What it changes

Passed 17 of 21 test cases with the skill, and 6 of 21 without it.

Without skill27%

With skill82%

Checks it passed that the model alone missed

Asks whether to set a CI exit gate on breaking changes.
States that Security accounts for 20% of the scorecard weight.
States that Usability accounts for 15% of the scorecard weight.

and 10 more in the full report

12 fixed6 passed either way4 still failing0 broke

Pass-rate lift: +55 pp
Tokens: +58%
Agent turns: 0%
Response time: -16%

Model gemini-3.6-flashMeasured 8/20/2026v118 of 22 cases passed with skill · 21 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/borghei-api-design-reviewer/SKILL.md https://app.decimal.ai/s/borghei-api-design-reviewer/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add borghei-api-design-reviewer, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/borghei-api-design-reviewer/ and pins it in .decimal/skills.lock

decimalai skills add borghei-api-design-reviewer

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/borghei-api-design-reviewer/SKILL.md https://app.decimal.ai/s/borghei-api-design-reviewer/SKILL.md

Raw file: /s/borghei-api-design-reviewer/SKILL.md ↗ · machine-readable summary at /s/borghei-api-design-reviewer.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

We want to evaluate `inventory-api.json` using the API scorecard tool and set a pipeline threshold that fails if the design grade falls below 'B'. What command should be executed?

What was checked, without and with the skill
Checked	Without skill	With skill
Specifies running python scripts/api_scorecard.py inventory-api.json --min-grade B.	Missed	Passed

case-04 · gemini-3.6-flash · 8/20/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md68 lines8 filesincludes scripts

API Design Reviewer

Comprehensive analysis and review of REST API designs against conventions, best practices, and industry standards. Helps engineering teams build consistent, maintainable, well-designed APIs through automated linting, breaking-change detection, and design scorecards.

Core Capabilities

API linting & convention analysis — resource naming (kebab-case URLs, camelCase fields), HTTP method usage, URL structure, status-code compliance, error-format consistency, and documentation coverage.
Breaking change detection — endpoint removal, response-shape changes, field removal/rename, type changes, new required fields, and status-code changes between two spec versions, with migration guides.
API design scoring — weighted scorecard across Consistency (30%), Documentation (20%), Security (20%), Usability (15%), and Performance (15%), with letter grades A–F and recommendations.

When to Use

Designing a new REST API or reviewing an API contract.
Validating an OpenAPI/Swagger spec against REST conventions.
Managing API versioning and detecting breaking changes between releases.
Gating deployments on API design quality in CI.

Clarify First

Before producing the review, confirm these inputs. If any is unknown or vague, ASK — do not assume:

Which output — lint report, design scorecard, or breaking-change detection (selects api_linter.py, api_scorecard.py, or breaking_change_detector.py)
Spec file(s) — the OpenAPI/Swagger JSON, or the two versions to diff (the input the tools parse)
Quality bar / CI gate — minimum grade or fail-on-breaking (sets --min-grade / --exit-on-breaking and how strict the verdict is)

Stop rule: ask only the 2-3 that most change the output. If the user says "just draft it," proceed and list your assumptions at the top of the artifact.

Tools

Tool	Purpose	Command
`api_linter.py`	Lint an OpenAPI/Swagger JSON spec for REST conventions and best practices	`python scripts/api_linter.py openapi.json --format json`
`breaking_change_detector.py`	Detect breaking changes between two spec versions (with migration guides)	`python scripts/breaking_change_detector.py v1.json v2.json --exit-on-breaking`
`api_scorecard.py`	Score API design quality across 5 weighted dimensions (A–F grades)	`python scripts/api_scorecard.py openapi.json --min-grade B`

References

Load the reference that matches the task — keep this file lean and pull detail on demand:

references/rest-design-patterns.md — REST naming/method/URL principles, versioning strategies, pagination patterns, error formats and status codes, auth/RBAC patterns, rate limiting, HATEOAS, idempotency, backward-compatibility rules, OpenAPI validation, performance, and security best practices. Read when designing or reviewing endpoints.

Track record

Benchmark

17 / 21

test cases passed, vs 6 / 21 without

Adoption

Users: 1
Times used: 22

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

borghei / claude-skills

engineering/api-design-reviewer/SKILL.md

View on GitHub ↗

License MIT + Commons ClauseImported 8/3/2026Version v1Bundled 7 files · scripts

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See it in action

What's inside

API Design Reviewer

Core Capabilities

When to Use

Clarify First

Tools

References

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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