Added contribution guides

.github/pull_request_template.md

@@ -0,0 +1,14 @@
+## Summary
+
+Describe the problem and the proposed change.
+
+## Testing
+
+List the commands or manual checks used to verify the change.
+
+- [ ] `cargo fmt --check`
+- [ ] `cargo test`
+
+## Contributor responsibility
+
+- [ ] I understand, tested, and take ownership of this change. It is not an unreviewed or fully automated AI-generated submission.

CONTRIBUTING.md

@@ -0,0 +1,27 @@
+# Contributing to Tofu CLI
+
+Thanks for considering a contribution.
+
+## Before opening a pull request
+
+- Keep changes focused on one problem.
+- Open an issue before starting a large feature or behavioral change.
+- Add or update tests when behavior changes.
+- Run `cargo fmt --check` and `cargo test`.
+- Update user-facing documentation when commands or output change.
+
+## AI-assisted contributions
+
+Using AI tools for research, learning, debugging, or drafting is welcome.
+However, Tofu does not accept pull requests submitted without meaningful human
+review and ownership.
+
+Contributors must understand, test, and be able to explain and maintain every
+change they submit. Fully automated, bulk-generated, or low-effort AI pull
+requests will be closed.
+
+## Pull requests
+
+Explain the problem being solved, the approach taken, and how the change was
+tested. Keep unrelated refactoring out of the pull request.
+

README.md

@@ -109,6 +109,11 @@ Tofu is not an ngrok replacement. Use ngrok, staging, a preview URL, or another
 
 Full quickstart and provider examples: [trytofu.dev/docs](https://trytofu.dev/docs)
 
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) for contribution guidelines, including
+the policy for AI-assisted submissions.
+
 ## License
 
 MIT