Add contribution policy docs and PR checklist template

Author: gschier

.github/pull_request_template.md

@@ -0,0 +1,18 @@
+## Summary
+
+<!-- Describe the bug and the fix in 1-3 sentences. -->
+
+## Submission
+
+- [ ] This PR is a bug fix or small-scope improvement.
+- [ ] If this PR is not a bug fix or small-scope improvement, I linked an approved feedback item below.
+- [ ] I have read and followed [`CONTRIBUTING.md`](CONTRIBUTING.md).
+- [ ] I tested this change locally.
+- [ ] I added or updated tests when reasonable.
+
+Approved feedback item (required if not a bug fix or small-scope improvement):
+<!-- https://yaak.app/feedback/... -->
+
+## Related
+
+<!-- Link related issues, discussions, or feedback items. -->

CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing to Yaak
+
+Yaak accepts community pull requests for:
+
+- Bug fixes
+- Small-scope improvements directly tied to existing behavior
+
+Pull requests that introduce broad new features, major redesigns, or large refactors are out of scope unless explicitly approved first.
+
+## Approval for Non-Bugfix Changes
+
+If your PR is not a bug fix or small-scope improvement, include a link to the approved [feedback item](https://yaak.app/feedback) where contribution approval was explicitly stated.
+
+## Development Setup
+
+For local setup and development workflows, see [`DEVELOPMENT.md`](DEVELOPMENT.md).

README.md

@@ -58,8 +58,10 @@ Built with [Tauri](https://tauri.app), Rust, and React, it’s fast, lightweight
 
 ## Contribution Policy
 
-Yaak is open source but only accepting contributions for bug fixes. To get started, 
-visit [`DEVELOPMENT.md`](DEVELOPMENT.md) for tips on setting up your environment.
+> [!IMPORTANT]
+> Community PRs are currently limited to bug fixes and small-scope improvements.
+> If your PR is out of scope, link an approved feedback item from [yaak.app/feedback](https://yaak.app/feedback).
+> See [`CONTRIBUTING.md`](CONTRIBUTING.md) for policy details and [`DEVELOPMENT.md`](DEVELOPMENT.md) for local setup.
 
 ## Useful Resources