adding-copyright-headers

# Adding Copyright Headers ## Formats ### Dart Files (`.dart`) ```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`) ```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`) ```html <!-- 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`) ```bash # 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 1. **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). 2. **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. 3. **Exclusions**: Copyright headers are **not necessary** in directories that begin with a dot (`.`), such as: - `.agents/` - `.gemini/` - `.github/` 4. **Existing Files**: When editing an existing file, do NOT modify the year in the copyright header. Leave it as it is. 5. **Subsequent Edits**: Subsequent edits should not modify the year. ## Examples (for 2026) ### Shell Script with Shebang ```bash #!/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 ```dart // 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. ```