Automattic logo

Skill

testing-js

check JavaScript files for syntax errors

Covers JavaScript Code Analysis Testing Debugging

Description

Guidelines for checking JavaScript files for syntax errors

SKILL.md

When to use me

Use this skill when validating JavaScript files for syntax errors. Do not use this skill for PHP validation.

Step 1: Identify JavaScript files

Find all JS files in the project, excluding node_modules/, build/, and dist/ directories:

find . -name "*.js" -not -path "*/node_modules/*" -not -path "*/build/*" -not -path "*/dist/*"

Step 2: Check syntax

Use Node to check each JS file for syntax errors:

node --check <file>
  • A file with valid syntax exits 0 with no output.
  • A file with syntax errors prints the error with line number and exits non-zero.
  • Fix any syntax errors found by editing the file, then re-check.

Rules

  • Syntax only: This skill checks for JavaScript syntax errors. Do not run ESLint or other coding standard tools.
  • Max 3 cycles: Run at most 3 fix-then-retest cycles per file. If issues remain after 3 cycles, report them as unresolved.
  • Never modify business logic: Only fix syntax errors. Do not change how the code works.
  • Report format: After testing, report results as:
    • PASS: No syntax errors
    • FAIL: List remaining errors with file, line, and message

© 2026 YourAI.tools. Every skill from an identity-verified publisher.

Independent catalog. Not affiliated with, endorsed by, or sponsored by Anthropic or any listed publisher. All trademarks belong to their respective owners.