## What this PR does
Two independent cleanups in agent-facing documentation:
1. **Refocus `docs/agents/contributing.md` on project-side
conventions.** The file previously mixed project rules (commit format,
PR structure) with personal workflow preferences (e.g. "do not commit
automatically, show the diff first", subjective guidance on how to
evaluate AI-bot review comments). Personal preferences belong in
individual contributors' own agent config (`~/CLAUDE.md` or equivalent),
not in a shared project doc that every agent reads. This PR keeps only
the project-side artifacts: what a commit/PR must look like when it
reaches the repository.
2. **Adopt Conventional Commits.** Recent commit history mixes
`[component]` prefix and `type(scope):` styles. This PR picks
Conventional Commits and aligns all agent-facing docs and the PR
template on it, so contributors and bots get one consistent answer.
Also documents the `Assisted-By:` trailer convention for AI-authored
commits.
Changes:
- `.github/PULL_REQUEST_TEMPLATE.md`: update guidance and release-note
example
- `docs/agents/contributing.md`: drop personal workflow guidance, link
to the PR template instead of duplicating it, switch examples to
Conventional Commits, document `Assisted-By:` trailer
- `docs/agents/overview.md`, `AGENTS.md`, `.gemini/styleguide.md`:
update commit format references
### Release note
```release-note
docs: adopt Conventional Commits (`type(scope): description`) for commit and PR titles
```
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Documentation**
* Switched contribution & PR guidance to Conventional Commits
(`type(scope): description`) and added explicit allowed types, scope
examples, and breaking-change notation (`!` or `BREAKING CHANGE:`).
* Updated PR template, release-note expectations, validation messaging,
and contributor checklist to match the new convention.
* Added AI Agent Attribution trailers for assisted commits and
streamlined branch/PR workflow guidance (rebase/cleanup and PR creation
examples).
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
c87cccae99