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express-api-generator

Generates Express.js REST API endpoints with TypeScript following security best practices. Use when the user asks to create a REST API, backend service, or CRUD endpoints. Produces code with parameterized SQL queries, bcrypt password hashing, JWT via environment variables, input validation with zod, helmet security headers, proper error handling, and typed request/response handlers.

80

Quality

100%

Does it follow best practices?

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Adds up to 20 points to the overall score

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

100%Scale 1-3

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

This is an excellent skill that demonstrates best practices across all dimensions. It provides concrete, executable code with clear security patterns, maintains a logical step-by-step workflow with explicit validation checkpoints, and appropriately delegates detailed patterns to a reference file. The content respects Claude's intelligence while providing the specific, actionable guidance needed for secure API development.

DimensionReasoningScore

Conciseness

The content is lean and efficient, providing only necessary information without explaining concepts Claude already knows. Each section delivers actionable code without padding or unnecessary context about what Express, JWT, or SQL injection are.

3 / 3

Actionability

Provides fully executable TypeScript code examples that are copy-paste ready. Specific patterns for parameterized queries, zod validation, JWT middleware, and security headers are all concrete and complete.

3 / 3

Workflow Clarity

Excellent multi-step workflow with explicit checkpoints after each step. Each checkpoint provides specific validation criteria (compile cleanly, test queries, verify rejection, confirm 401 responses, etc.) creating clear feedback loops for error detection.

3 / 3

Progressive Disclosure

Well-structured with clear overview in SKILL.md and appropriate references to patterns.md for additional patterns (insert/update/delete, password hashing, route patterns). References are one level deep and clearly signaled with descriptive links.

3 / 3

Total

12

/

12

Passed

Description

100%Scale 1-3

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

This is an excellent skill description that hits all the marks. It clearly specifies the technology stack (Express.js, TypeScript), lists concrete security features and patterns, and provides explicit trigger conditions. The description is comprehensive yet concise, making it easy for Claude to select this skill when users request REST API development.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions: 'parameterized SQL queries, bcrypt password hashing, JWT via environment variables, input validation with zod, helmet security headers, proper error handling, and typed request/response handlers' - these are highly specific technical capabilities.

3 / 3

Completeness

Clearly answers both what ('Generates Express.js REST API endpoints with TypeScript following security best practices') and when ('Use when the user asks to create a REST API, backend service, or CRUD endpoints') with explicit trigger guidance.

3 / 3

Trigger Term Quality

Includes natural keywords users would say: 'REST API', 'backend service', 'CRUD endpoints', 'Express.js', 'TypeScript'. These are common terms developers use when requesting this type of work.

3 / 3

Distinctiveness Conflict Risk

Highly distinctive with clear niche: Express.js + TypeScript + specific security stack (zod, helmet, bcrypt, JWT). Unlikely to conflict with generic coding skills or other backend frameworks due to the specific technology stack mentioned.

3 / 3

Total

12

/

12

Passed

Validation

100%

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

Validation11 / 11 Passed

Validation for skill structure

No warnings or errors.

Repository
jbaruch/tessl-demo
Reviewed

Table of Contents

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