fastapi

REST API and WebSocket development with FastAPI emphasizing security, performance, and async patterns

Quality

58%

Does it follow best practices?

Impact

—

No eval scenarios have been run

Securityby

Passed

No known issues

Fix and improve this skill with Tessl

tessl review fix ./skills/fastapi/SKILL.md

Quality

Content

85%

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

This is a strong, comprehensive FastAPI skill with excellent actionability - nearly all patterns include complete, executable code examples with clear BAD/GOOD comparisons. The TDD workflow and pre-deployment checklist provide good validation checkpoints. Minor issues include some redundancy (duplicate section 6, repeated security reminders) and the skill could be slightly more concise by removing overlapping content.

Suggestions

Remove duplicate section 6 (Testing & Validation appears twice with different content) and consolidate testing examples

Trim the summary section which largely repeats the security reminders already covered in detail throughout the document

Dimension	Reasoning	Score
Conciseness	The skill is comprehensive but includes some redundancy (e.g., summary section repeats earlier points, section 6 appears twice with different content, version tables and dependency lists overlap). Some explanatory text could be trimmed, though most content is actionable.	2 / 3
Actionability	Excellent executable code examples throughout - JWT authentication, rate limiting, file upload validation, connection pooling, and testing patterns are all copy-paste ready with complete implementations. Anti-patterns show clear BAD/GOOD comparisons.	3 / 3
Workflow Clarity	Clear TDD workflow with explicit steps (write test → implement → refactor → verify). The verification step includes specific commands (pytest, mypy, bandit) with explicit 'all must pass before committing' checkpoint. Pre-deployment checklist provides validation gates.	3 / 3
Progressive Disclosure	Well-organized with clear file structure at the top pointing to reference files (security-examples.md, advanced-patterns.md, threat-model.md). Content is appropriately split with the main file covering core patterns and references for deeper dives.	3 / 3
	Total	11 / 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 the technology stack (FastAPI) and general concerns (security, performance, async) but lacks concrete actions and explicit trigger guidance. It reads more like a tagline than a functional skill description that would help Claude choose it from a large skill library.

Suggestions

Add a 'Use when...' clause with explicit triggers like 'Use when building APIs with FastAPI, creating REST endpoints, implementing WebSocket connections, or when the user mentions FastAPI, Pydantic, or async Python web development'.

List specific concrete actions such as 'Create REST endpoints, implement authentication/authorization, handle WebSocket connections, define Pydantic models, configure middleware'.

Include common user terms and file extensions like 'Python backend', 'API routes', 'real-time communication', '.py files with FastAPI imports'.

Dimension	Reasoning	Score
Specificity	Names the domain (FastAPI, REST API, WebSocket) and mentions some qualities (security, performance, async patterns), but doesn't list concrete actions like 'create endpoints', 'implement authentication', or 'handle websocket connections'.	2 / 3
Completeness	Describes what domain it covers but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. The rubric caps completeness at 2 for missing this, and the 'what' is also weak.	1 / 3
Trigger Term Quality	Includes relevant technical terms like 'REST API', 'WebSocket', 'FastAPI', and 'async' that users might mention, but misses common variations like 'API endpoints', 'backend', 'Python web framework', or 'real-time'.	2 / 3
Distinctiveness Conflict Risk	FastAPI is specific enough to distinguish from general Python or other web frameworks, but 'REST API' and 'WebSocket development' could overlap with skills for other frameworks like Flask, Django, or Express.	2 / 3
	Total	7 / 12 Passed

Validation

68%

Warnings & errors only

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

Validation — 11 / 16 Passed

Validation for skill structure

Criteria	Description	Result
skill_md_line_count	SKILL.md is long (684 lines); consider splitting into references/ and linking	Warning
description_trigger_hint	Description may be missing an explicit 'when to use' trigger hint (e.g., 'Use when...')	Warning
metadata_version	'metadata' field is not a dictionary	Warning
license_field	'license' field is missing	Warning
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	11 / 16 Passed

Repository: martinholovsky/claude-skills-generator
Commit: 1086ef2

Reviewed: 5 months ago

Table of Contents

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