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Adding Copyright Headers Agent Skill

by flutter

Adds copyright headers to files based on file type. Use when creating new files or when asked to verify copyright headers.

639 tokens
context cost
the whole folder, loaded on every use
1
files
instructions only
0
copies elsewhere
how many repositories repackaged it
1727
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository 
npx skills add https://github.com/flutter/devtools --skill adding-copyright-headers

The instruction itself

10 sections, as written by the author

Adding Copyright Headers

Formats

Dart Files (.dart)

// Copyright 20?? The Flutter Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.

YAML Files (.yaml)

# Copyright 20?? The Flutter Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.

HTML Files (.html) and Markdown Files (.md)

<!--
Copyright 20?? The Flutter Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
-->

Shell Scripts (.sh)

# Copyright 20?? The Flutter Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.

Instructions

  • New Files: When creating a new file, you MUST add the appropriate copyright header based on its file extension.
  • Replace 20?? with the current year (e.g., 2026).
  • Placement:
  • The copyright header should be at the very top of the file by default.
  • Exception: If the file requires a shebang (e.g., #!/bin/bash in .sh files) or other necessary frontmatter, the copyright header must come after the frontmatter, separated by a blank line.
  • Exclusions: Copyright headers are not necessary in directories that begin with a dot (.), such as:
  • .agents/
  • .gemini/
  • .github/
  • Existing Files: When editing an existing file, do NOT modify the year in the copyright header. Leave it as it is.
  • Subsequent Edits: Subsequent edits should not modify the year.

Examples (for 2026)

Shell Script with Shebang

#!/bin/bash

# Copyright 2026 The Flutter Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.

Dart File

// Copyright 2026 The Flutter Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.

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How to use it

Copy the folder

Take flutter/adding-copyright-headers from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.