revert: "ci(workflows): consolidate pr workflows into ci.yml"

[Yusuke4869]

Reverts #15

Summary by CodeRabbit

リリースノート

• Chores
  • ワークフロー設定を再構成。PR title検証ワークフローを有効化し、PRの自動割り当て機能を最適化しました。

[coderabbitai]

📝 Walkthrough

Walkthrough

GitHub Actions ワークフロー構造が統合から分散型へ変更されました。ci.ymlが削除され、auto-author-assign.ymlとsemantic-pr-title.ymlがコメント状態から有効化されました。PR自動割り当てとセマンティックPRタイトルチェック機能が個別ワークフローに分離されました。

Changes

Cohort / File(s)	Summary
ワークフロー有効化 ​.github/workflows/auto-author-assign.yml, .github/workflows/semantic-pr-title.yml	コメント記号を削除して両ワークフローを有効化。PR作成者の自動割り当てとセマンティックPRタイトル検証機能がアクティブ化されました。
統合ワークフロー削除 ​.github/workflows/ci.yml	PR作成者割り当て、PRタイトルリント検証、失敗時コメント投稿などを含む統合CI ワークフロー全体（85行）を削除。機能は個別ワークフローに分離されました。

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• ci(workflows): consolidate pr workflows into ci.yml #15: このPRと直接的に対立する変更を行っており、個別ワークフローの有効化とci.yml削除に対して、ci.ymlへの統合とワークフローのコメント化を実施。
• ci: refine semantic PR title failure note #7: .github/workflows/semantic-pr-title.ymlを同じ方向で修正し、ワークフローを有効化した上で失敗時のメッセージテキストを調整。
• ci: add workflow to auto assign author #2: .github/workflows/auto-author-assign.ymlを同じく有効化して、PR作成者の自動割り当て機能を実装。

Poem

🐰 ワークフローが目覚めたよ、
コメント外して独立へ、
統合から分散へシフト、
CI は消えて役割分担、
自動化の新しい道へ！✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	PRのタイトルは、変更内容を正確に反映しており、PR #15で導入された変更を元に戻すという主な意図を明確に伝えています。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch revert-15-ci/consolidate-pr-workflows

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[Copilot]

Pull request overview

This PR reverts a previous consolidation of PR-related workflows into a single ci.yml, restoring dedicated workflows for PR title linting and auto-assigning the PR author.

Changes:

• Re-enabled the standalone Semantic PR Title workflow.
• Re-enabled the standalone Auto Author Assign workflow.
• Removed the consolidated .github/workflows/ci.yml.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
.github/workflows/semantic-pr-title.yml	Restores PR title lint workflow previously commented out.
.github/workflows/auto-author-assign.yml	Restores PR author auto-assign workflow previously commented out.
.github/workflows/ci.yml	Deletes the consolidated workflow that previously bundled both jobs.

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In @.github/workflows/auto-author-assign.yml:
- Line 17: Change the external Action reference used in the pull_request_target
job from a mutable tag to an immutable commit SHA: replace the uses entry
"toshimaru/auto-author-assign@v3.0.1" with the repository@<commit-SHA> form
(e.g., toshimaru/auto-author-assign@<SHA>) so the exact commit is executed;
ensure any other external actions in this workflow are likewise pinned to commit
SHAs to prevent upstream tag replacement when running under pull_request_target.

In @.github/workflows/semantic-pr-title.yml:
- Line 22: This workflow uses amannn/action-semantic-pull-request and
marocchino/sticky-pull-request-comment under pull_request_target with write
permissions; replace their tag references with their full commit SHAs (pin to
the exact repository commit) so the executed code cannot change via upstream tag
updates—update the occurrences of "uses:
amannn/action-semantic-pull-request@..." and "uses:
marocchino/sticky-pull-request-comment@..." to use the full SHA strings for each
action.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 3cfa8f12-920f-4d4a-9798-2e5076dd6bcb

📥 Commits

Reviewing files that changed from the base of the PR and between e15f52b and 2e3e3f8.

📒 Files selected for processing (3)

• .github/workflows/auto-author-assign.yml
• .github/workflows/ci.yml
• .github/workflows/semantic-pr-title.yml

💤 Files with no reviewable changes (1)

• .github/workflows/ci.yml

📜 Review details

🧰 Additional context used

🧠 Learnings (1)

📚 Learning: 2026-02-06T05:30:47.662Z

Learnt from: Yusuke4869
Repo: densanken/PR-sandbox PR: 1
File: .github/workflows/semantic-pr-title.yml:11-13
Timestamp: 2026-02-06T05:30:47.662Z
Learning: amannn/action-semantic-pull-request を使用する場合、WIP 状態の PR を管理するために commit status API (POST /repos/:owner/:repo/statuses/:sha) を利用します。これにはリポジトリのトークンに write:statuses 権限が必要です。該当ワークフロー (.github/workflows/semantic-pr-title.yml のようなファイル) を使用する際は、トークン権限を appropriate に設定し、WIP の PR を 'pending' ステータスへ設定する挙動を理解しておくこと。

Applied to files:

• .github/workflows/auto-author-assign.yml
• .github/workflows/semantic-pr-title.yml

🔇 Additional comments (1)

.github/workflows/semantic-pr-title.yml (1)

11-13: statuses: write を戻したのは適切です。

wip: true を有効にした amannn/action-semantic-pull-request では pending status の更新にこの権限が必要なので、この revert で必要権限が復元されています。

Based on learnings amannn/action-semantic-pull-request を使用する場合、WIP 状態の PR を管理するために commit status API (POST /repos/:owner/:repo/statuses/:sha) を利用し、これにはリポジトリのトークンに write:statuses 権限が必要です。