---
name: lint-and-validate-3b0e72c74288
description: "Automatic quality control, linting, and static analysis procedures. Use after every code modification to ensure syntax correctness and project standards. Triggers onKeywords: lint, format, check, v..."
allowed-tools: Read, Glob, Grep, Bash
risk: unknown
source: rootcastle-rei
---

# Lint and Validate Skill

> **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
1. **Lint/Fix:** `npm run lint` or `npx eslint "path" --fix`
2. **Types:** `npx tsc --noEmit`
3. **Security:** `npm audit --audit-level=high`

#### Python
1. **Linter (Ruff):** `ruff check "path" --fix` (Fast & Modern)
2. **Security (Bandit):** `bandit -r "path" -ll`
3. **Types (MyPy):** `mypy "path"`

## The Quality Loop
1. **Write/Edit Code**
2. **Run Audit:** `npm run lint && npx tsc --noEmit`
3. **Analyze Report:** Check the "FINAL AUDIT REPORT" section.
4. **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>` |


## When to Use
This skill is applicable to execute the workflow or actions described in the overview.

---

> 🏰 **Rei Skills** — Curated by [Rootcastle Engineering & Innovation](https://www.rootcastle.com) | Batuhan Ayrıbaş  
> Engineering Beyond Boundaries | admin@rootcastle.com


---
Source attribution: rootcastleco
Original project: https://github.com/rootcastleco/rei-skills/blob/6c114a9825475168e93271fae4da0476c612dc1c/skills/lint-and-validate/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Dave AI.

## Upstream license notice

MIT License

Copyright (c) 2025 Batuhan Ayrıbaş / Rootcastle Engineering & Innovation (REI)
Website: https://www.rootcastle.com
Contact: admin@rootcastle.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Dave AI resource metadata

Creator / publisher: rootcastleco
Original project: https://github.com/rootcastleco/rei-skills/blob/6c114a9825475168e93271fae4da0476c612dc1c/skills/lint-and-validate/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering
Roles: Backend Developer, DevOps / SRE, Frontend Developer, Full-Stack Developer, QA / Test Engineer
Specialties: Cross Platform, DevOps, Testing
Tools: Eslint
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 3b59a425d663217e0e102404a858f1ad3a74edbce379463e5556d2e16c930394