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api-endpoint-builder

Builds production-ready REST API endpoints with validation, error handling, authentication, and documentation. Follows best practices for security and scalability.

39

Quality

37%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./plugins/antigravity-awesome-skills-claude/skills/api-endpoint-builder/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

42%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This skill provides highly actionable, executable code examples for building REST API endpoints, which is its primary strength. However, it is significantly over-verbose, explaining many concepts Claude already knows (HTTP status codes, CRUD patterns, basic middleware), and dumps everything into a single monolithic file without progressive disclosure. The workflow lacks explicit sequencing and validation checkpoints for the multi-step process of building a production endpoint.

Suggestions

Remove or drastically condense sections Claude already knows: HTTP status codes, CRUD verb mappings, basic response format patterns — these add ~50 lines of unnecessary content.

Extract reference material (security checklist, documentation template, testing examples, common patterns) into separate bundle files and link to them from a concise overview.

Add a clear numbered workflow: 1. Define route → 2. Add validation → 3. Implement handler → 4. Add error handling → 5. Test endpoint → 6. Verify responses match expected format, with explicit validation checkpoints.

Trim the 'Key Principles' section at the end — it restates what was already shown in the examples and adds no new information.

DimensionReasoningScore

Conciseness

The skill is extremely verbose at ~200+ lines, explaining many concepts Claude already knows well (HTTP status codes, CRUD patterns, basic Express middleware, pagination, filtering). The status code list, response format examples, and security checklist are all standard knowledge that don't need to be spelled out in this detail.

1 / 3

Actionability

The code examples are concrete, executable, and copy-paste ready. Route definitions, validation middleware, handler implementations, error handling, pagination, testing — all are fully functional JavaScript/Express code with realistic patterns.

3 / 3

Workflow Clarity

The skill lists the components of an endpoint (route, validation, handler, etc.) but doesn't provide a clear sequential workflow for building one. There are no explicit validation checkpoints — e.g., no step to verify the endpoint works after creation, no feedback loop for testing before deployment.

2 / 3

Progressive Disclosure

All content is inlined in a single monolithic file with no supporting bundle files. The HTTP status codes reference, security checklist, CRUD patterns, pagination, filtering, documentation template, and testing examples could all be split into separate reference files. The 'Related Skills' section references other skills but the actual content is a wall of text.

1 / 3

Total

7

/

12

Passed

Description

32%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description identifies a clear domain (REST API development) and lists relevant concerns, but it lacks a 'Use when...' clause, which is a significant gap for skill selection. The capability list stays at a category level rather than naming concrete actions, and the trigger terms, while relevant, miss common user phrasings and variations.

Suggestions

Add an explicit 'Use when...' clause with trigger phrases like 'Use when the user asks to create API routes, build REST endpoints, set up CRUD operations, or scaffold an API server.'

Make capabilities more concrete by specifying actions such as 'generates route handlers, creates request validation schemas, produces OpenAPI/Swagger documentation, and implements JWT/OAuth authentication middleware.'

Include common user-facing keywords and variations like 'API routes', 'HTTP endpoints', 'CRUD', 'Express', 'FastAPI', 'middleware', 'Swagger' to improve trigger term coverage.

DimensionReasoningScore

Specificity

Names the domain (REST API endpoints) and lists some actions/concerns (validation, error handling, authentication, documentation), but these read more like feature categories than concrete actions. It doesn't specify formats, frameworks, or granular operations like 'generate OpenAPI specs' or 'create CRUD routes'.

2 / 3

Completeness

Describes what it does (builds REST API endpoints with various features) but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. Per the rubric, a missing 'Use when' clause caps completeness at 2, and since the 'when' is entirely absent, this scores at the lower end.

1 / 3

Trigger Term Quality

Includes relevant terms like 'REST API', 'endpoints', 'authentication', and 'validation' that users might naturally say. However, it misses common variations like 'API routes', 'HTTP endpoints', 'middleware', 'CRUD', 'Express', 'FastAPI', or file extensions, limiting keyword coverage.

2 / 3

Distinctiveness Conflict Risk

REST API is a reasonably specific domain, but terms like 'validation', 'error handling', 'authentication', and 'security' are broad enough to overlap with general backend development, web security, or code quality skills. Without sharper scoping it could conflict with adjacent skills.

2 / 3

Total

7

/

12

Passed

Validation

90%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

10

/

11

Passed

Repository
sickn33/antigravity-awesome-skills
Reviewed

Table of Contents

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