---

name: file-headers description: MANDATORY for every coding agent (Claude Code, Codex, or any other) on every change-set — every applicable source file the agent creates or updates MUST start with the project's copyright/authorship header (file overview + exact author line). Use automatically whenever writing a new file or editing an existing one; do not wait to be asked. Covers JS/TS/TSX/CJS/MJS, Python, shell, and CSS. Includes the audit script to verify repo-wide compliance.

File Headers — Copyright Comment + File Overview

Every applicable source file in this repository starts with a header comment containing a file overview and the exact author line:

@author Son Nguyen <hoangson091104@gmail.com>

The name and email must be exactly as above — no variations, no substitutions, no other names. This applies to every coding agent working in this repo (Claude Code, Codex, or any other tool): when you create a new applicable file, write the header first; when you update an existing applicable file that is missing the header, add it as part of the same change.

Applicable files

Included	Excluded
*.js, *.ts, *.tsx, *.cjs, *.mjs	anything under node_modules/, dist/, build/, data/, .worktrees/
*.py, *.sh	vendored/minified files (*.min.js, wiki/mermaid.min.js)
*.css	generated files (wiki/i18n-content.js — carries its own AUTO-GENERATED banner)
	snapshots (__snapshots__/), lockfiles, JSON/YAML/Markdown

Header formats by file type

JS / TS / TSX — server & scripts style (overview inline in @file):

/**
 * @file One-to-few-sentence overview of what this file does and why it
 * exists. Mention the key contracts or invariants the file owns.
 * @author Son Nguyen <hoangson091104@gmail.com>
 */

JS / TS / TSX — client style (@file name + @description overview), used under client/src/:

/**
 * @file ComponentName.tsx
 * @description What the component/module renders or provides and how it fits
 * into the app.
 * @author Son Nguyen <hoangson091104@gmail.com>
 */

CSS (same block-comment shape as client/src/index.css):

/**
 * @file file.css
 * @description What these styles cover.
 * @author Son Nguyen <hoangson091104@gmail.com>
 */

Shell (# block right after the shebang; existing overview comments count — just make sure the @author line is in the block):

#!/usr/bin/env bash
# script-name.sh — what the script does, one to few lines.
# @author Son Nguyen <hoangson091104@gmail.com>

Python (inside the module docstring):

"""
module.py — what the module does.

@author Son Nguyen <hoangson091104@gmail.com>
"""

Rules

1. New file → header first. Any applicable file you create starts with the header before any code (after the shebang for scripts).
2. Touched file missing header → add it. If you edit a file that lacks the header, add one in the same commit. Write a real overview — describe what the file actually does; never a placeholder like "TODO" or "utility file".
3. Exact author line. @author Son Nguyen <hoangson091104@gmail.com> — byte-exact, in every file type (shell and Python use it inside # / docstring comments).
4. Don't churn existing headers. If a file already has a compliant header, leave it alone unless the file's purpose changed (then update the overview).
5. Overviews must stay truthful. When an edit changes what a file does, update its @file/@description overview in the same change.

Audit

Run the bundled checker to list any applicable file missing the header:

bash .claude/skills/file-headers/scripts/check-headers.sh

Exit code 0 = fully compliant; 1 = the printed files are missing headers. Run it before finishing any change-set that adds files, and during reviews.

On every pull request, GitHub Actions runs .claude/skills/file-headers/scripts/check-headers-pr.sh against only the files changed in the PR diff (added, copied, renamed, or modified). Test locally before pushing:

bash .claude/skills/file-headers/scripts/check-headers-pr.sh origin/master HEAD