When should the skill run?

After every code modification. The skill treats validation as mandatory and instructs the agent not to finish a task until the code is error-free.

What does it do for Python projects?

It runs Ruff for linting with fixes, Bandit for security checks, and MyPy for type checking on the given path.

What does it do for Node.js and TypeScript projects?

It runs npm run lint or ESLint with --fix, checks types with tsc --noEmit, and runs npm audit at the high severity level.

Lint and Validate Skill

SkillAI & models

Lint-and-validate is a skill that gives an AI agent automatic quality control, linting, and static analysis procedures. After every code modification, the agent runs the appropriate linters, type checks, and security audits for the project's ecosystem and keeps fixing issues until the code passes. This ensures syntax correctness and project standards before a task is reported as done.

Use Lint and Validate Skill in Claude, ChatGPT or Ahel Desktop

Free. Sign in, add Lint and Validate Skill and connect your AI. About a minute.

Claude ChatGPT Ahel Desktop

Also: Claude Code · Cursor · Codex

Then ask your AI: use the Lint and Validate Skill skill

Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Account requirements not reviewed. Check the skill instructions before use; ahel provides instructions and does not run this skill.

No other account needed.

Have a project with linting or type checking configured, such as an .eslintrc, tsconfig.json, or pyproject.toml file.

Lint and Validate SkillStart free

What your AI can do with it

Runs ESLint or npm run lint with auto-fix on Node.js and TypeScript changes
Checks types with tsc --noEmit and MyPy for Python projects
Runs security audits with npm audit and Bandit
Lints Python code with Ruff and applies fixes
Follows a quality loop that repeats audit and fix until checks pass
Includes lint_runner.py and type_coverage.py scripts for unified checks

Getting started

Have a project with linting or type checking configured, such as an .eslintrc, tsconfig.json, or pyproject.toml file.
Add the lint-and-validate skill to your agent so it can use the Read, Glob, Grep, and Bash tools.
Ask the agent to lint, format, check, validate, or run static analysis, or let it trigger automatically after code changes.
Review the FINAL AUDIT REPORT the agent produces and have it fix any failures before finishing.

What this skill tells your AI

The instructions your AI receives, as published by davila7/claude-code-templates in cli-tool/components/skills/development/lint-and-validate/SKILL.md and read by ahel’s review.

MANDATORY: Run appropriate validation tools after EVERY code change. Do not finish a task until the code is error-free.

Procedures by Ecosystem

Node.js / TypeScript

Lint/Fix: npm run lint or npx eslint "path" --fix
Types: npx tsc --noEmit
Security: npm audit --audit-level=high

Python

Linter (Ruff): ruff check "path" --fix (Fast & Modern)
Security (Bandit): bandit -r "path" -ll
Types (MyPy): mypy "path"

The Quality Loop

Write/Edit Code
Run Audit: npm run lint && npx tsc --noEmit
Analyze Report: Check the "FINAL AUDIT REPORT" section.
Fix & Repeat: Submitting code with "FINAL AUDIT" failures is NOT allowed.

Error Handling

If lint fails: Fix the style or syntax issues immediately.
If tsc fails: Correct type mismatches before proceeding.
If no tool is configured: Check the project root for .eslintrc, tsconfig.json, pyproject.toml and suggest creating one.

Strict Rule: No code should be committed or reported as "done" without passing these checks.

Scripts

Script	Purpose	Command
`scripts/lint_runner.py`	Unified lint check	`python scripts/lint_runner.py <project_path>`
`scripts/type_coverage.py`	Type coverage analysis	`python scripts/type_coverage.py <project_path>`

Signals

GitHub stars: 32k
Forks: 4k
Last commit: Oct 2026

Others that do the same job

lint-and-validate
Skill · vodailocz

Questions

When should the skill run?: After every code modification. The skill treats validation as mandatory and instructs the agent not to finish a task until the code is error-free.
What does it do for Python projects?: It runs Ruff for linting with fixes, Bandit for security checks, and MyPy for type checking on the given path.
What does it do for Node.js and TypeScript projects?: It runs npm run lint or ESLint with --fix, checks types with tsc --noEmit, and runs npm audit at the high severity level.

Advanced

Item type: skill
Key: lint-and-validate-davila7
Source: github.com/davila7/claude-code-templates

github.com/davila7/claude-code-templates