Mark AI-generated files as linguist-generated using .gitattributes to reduce PR noise

[slikts]

Problem

Many of the files generated for integration with Antigravity (Google), Claude, Copilot, Cursor, etc., are intentionally not gitignored so the tools can read them. This results in a high volume of auto-generated noise in pull request diffs, making code review more difficult.

Solution Proposal

Use the .gitattributes feature on GitHub to mark generated files and folders (such as .agent/rules/, .agent/skills/, .agent/workflows/, CLAUDE.md, etc.) with linguist-generated.

Example:

.agent/rules/** linguist-generated
.agent/skills/** linguist-generated
.agent/workflows/** linguist-generated
CLAUDE.md linguist-generated
.cursor/rules/** linguist-generated
.github/copilot-instructions.md linguist-generated

This will automatically collapse these files/folders in GitHub pull request UI, reducing noise but keeping the files visible and loadable by the relevant tools.

Optionally, rulesync could:

• Add these entries automatically when running rulesync gitignore or via a new rulesync gitattributes command.
• Document the approach in the README for advanced users/managers of multi-tool repos.

Related

• See discussion in: [Info] Antigravity: Rules are not loaded if .agent is in .gitignore (Workaround found) #981 (Antigravity & gitignore limitations)
• GitHub Docs: About generated files

Benefits

• Dramatically reduces distraction in code review and PR diffs involving rulesync and agent-tool integrations.
• Keeps compatibility for all tools (no gitignore-related breakage).
• No impact on file tracking, agent tool usage, or repository statistics.

[cm-dyoshikawa]

@slikts rulesync gitattributes seems a nice new feature. Thank you for your suggestion.