fix: improve Claude Code summary extraction with structured_output

[oikon48]

Summary

Claude Code Actionによる要約生成の信頼性を向上させるための修正です。

問題点

• max-turns: 1 が厳しすぎて20%の失敗率
• 要約が常に空になる（jq抽出の問題）
• セキュリティ検証でActionのSHAピンニング推奨

変更内容

修正	内容
permissions	id-token: write 追加（OIDC認証用）
checkout	v4 → v6
claude-code-action	タグ → SHAピンニング
diff_content	200行 → 50行（メモリ制限回避）
model	opus → sonnet-4-5（コスト削減）
max-turns	1 → 3（信頼性向上）
max-tokens	1024追加
抽出	structured_output 優先、env:ブロック使用
エラー処理	continue-on-error: true 追加

Test plan

• ワークフローがエラーなく完了
• Discord通知にAI要約が含まれる
• Claude失敗時もデフォルトメッセージで継続

Summary by CodeRabbit

• Chores
  • Upgraded GitHub Actions workflow configuration with improved authentication and dependency updates
  • Enhanced change notification system with better summary extraction logic and fallback handling
  • Updated Discord notification formatting with cleaner labels and improved readability
  • Optimized workflow performance by reducing diff content limits to prevent memory issues

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

A GitHub Actions workflow configuration update that upgrades checkout and Claude Code Action versions, adjusts AI model parameters from opus to sonnet with increased token/turn limits, refines summary extraction logic to prioritize structured output with character truncation, and reformats Discord notification fields by removing emoji prefixes from labels.

Changes

Cohort / File(s)	Summary
Workflow Dependencies & Permissions .github/workflows/notify-changes.yml	Bumped checkout action from v4 to v6; added explicit permissions (contents: read, id-token: write) for OIDC authentication with Claude Code Action.
Claude Code Action Configuration .github/workflows/notify-changes.yml	Upgraded Claude Code Action from v1 to newer beta version with continue-on-error enabled; switched model from claude-opus-4-5 to claude-sonnet-4-5; increased max-turns from 1 to 3; adjusted prompt to request 3-sentence Japanese summary; enabled JSON schema for structured output.
Diff Collection & Summary Extraction .github/workflows/notify-changes.yml	Reduced diff brief content limit from 200 to 50 lines; revised extraction logic to prioritize structured_output environment variable before falling back to execution file parsing; added markdown removal and 1000-character truncation to summary value.
Discord Notification Formatting .github/workflows/notify-changes.yml	Removed emoji prefixes from field labels and titles in Discord payload; updated field naming conventions and ensured summary string is included in embed; adjusted success/failure feedback messaging.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• fix: Use OAuth token auth for claude-code-action #9: Modifies Claude action authentication and model configuration parameters within the same notify-changes.yml workflow file.
• feat: Add Discord notification for documentation changes #7: Updates the same GitHub Actions workflow file with notification workflow refinements.
• Add Claude Code GitHub Workflow #8: Upgrades Claude Code Action version and invocation details in GitHub Actions workflows.

Poem

🐰 A workflow refreshed with newer grace,
Sonnet swaps opus in this place,
Permissions guarded, output bright,
Discord fields stripped clean of light,
The automation hops with might! ✨

🚥 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	The title accurately describes the main change: improving Claude Code summary extraction through the use of structured_output, which is a core improvement across the workflow modifications.
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.}

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In @.github/workflows/notify-changes.yml:
- Around line 143-145: The current sed substitution on SUMMARY (the line using
sed 's/```[^`]*```//g') won't match multiline code fences; change the
transformation so SUMMARY has multiline code blocks removed reliably—either run
SUMMARY through a single-command Perl regex that enables dot-all matching to
strip ```...``` spans or first collapse newlines to a single byte stream before
applying the existing sed, then restore/truncate; update the operation that
assigns SUMMARY to use one of these approaches and keep the subsequent tr and
head truncation intact.

[coderabbitai]

⚠️ Potential issue | 🟡 Minor

Sed pattern may not remove multiline code blocks.

The regex s/```[^]*```//gdoesn't match across newlines in basic sed, so multiline code blocks may not be fully stripped. Consider usingawk` or piping through `tr '\n' '\x00'` first if this becomes an issue.

For now, this is acceptable since the truncation and Discord's field limit provide a safety net.

🤖 Prompt for AI Agents

In @.github/workflows/notify-changes.yml around lines 143 - 145, The current sed
substitution on SUMMARY (the line using sed 's/```[^`]*```//g') won't match
multiline code fences; change the transformation so SUMMARY has multiline code
blocks removed reliably—either run SUMMARY through a single-command Perl regex
that enables dot-all matching to strip ```...``` spans or first collapse
newlines to a single byte stream before applying the existing sed, then
restore/truncate; update the operation that assigns SUMMARY to use one of these
approaches and keep the subsequent tr and head truncation intact.