From 4a7dea48ca1a0ae93013ad0d0bd505849716ce1e Mon Sep 17 00:00:00 2001
From: nrs <38722970+nrslib@users.noreply.github.com>
Date: Sun, 22 Feb 2026 21:52:40 +0900
Subject: [PATCH] takt: tasuku-taktga-surupull-request (#336)

---
 src/__tests__/postExecution.test.ts         | 57 +++++++++++++++++++++
 src/features/pipeline/steps.ts              |  2 +-
 src/features/tasks/execute/postExecution.ts |  6 ++-
 src/infra/task/summarize.ts                 |  5 +-
 4 files changed, 65 insertions(+), 5 deletions(-)

diff --git a/src/__tests__/postExecution.test.ts b/src/__tests__/postExecution.test.ts
index 284c0bb..dbb5718 100644
--- a/src/__tests__/postExecution.test.ts
+++ b/src/__tests__/postExecution.test.ts
@@ -173,6 +173,63 @@ describe('postExecutionFlow', () => {
     expect(result.prFailed).toBeUndefined();
     expect(result.prUrl).toBe('https://github.com/org/repo/pull/1');
   });
+
+  it('issues が渡された場合、PRタイトルにIssue番号プレフィックスが付与される', async () => {
+    mockFindExistingPr.mockReturnValue(undefined);
+
+    await postExecutionFlow({
+      ...baseOptions,
+      task: 'Fix the bug',
+      issues: [{ number: 123, title: 'This title should not appear in PR', body: '', labels: [], comments: 0 }],
+    });
+
+    expect(mockCreatePullRequest).toHaveBeenCalledWith(
+      '/project',
+      expect.objectContaining({ title: '[#123] Fix the bug' }),
+    );
+  });
+
+  it('issues が空配列の場合、PRタイトルにプレフィックスは付与されない', async () => {
+    mockFindExistingPr.mockReturnValue(undefined);
+
+    await postExecutionFlow({
+      ...baseOptions,
+      issues: [],
+    });
+
+    expect(mockCreatePullRequest).toHaveBeenCalledWith(
+      '/project',
+      expect.objectContaining({ title: 'Fix the bug' }),
+    );
+  });
+
+  it('issues が undefined の場合、PRタイトルにプレフィックスは付与されない', async () => {
+    mockFindExistingPr.mockReturnValue(undefined);
+
+    await postExecutionFlow(baseOptions);
+
+    expect(mockCreatePullRequest).toHaveBeenCalledWith(
+      '/project',
+      expect.objectContaining({ title: 'Fix the bug' }),
+    );
+  });
+
+  it('Issueプレフィックス付きタイトルが100文字を超える場合、適切に省略される', async () => {
+    mockFindExistingPr.mockReturnValue(undefined);
+    const longTask = 'A'.repeat(120);
+    const expectedTitle = `[#123] ${'A'.repeat(90)}...`;
+
+    await postExecutionFlow({
+      ...baseOptions,
+      task: longTask,
+      issues: [{ number: 123, title: 'Long issue', body: '', labels: [], comments: 0 }],
+    });
+
+    expect(mockCreatePullRequest).toHaveBeenCalledWith(
+      '/project',
+      expect.objectContaining({ title: expectedTitle }),
+    );
+  });
 });
 
 describe('resolveDraftPr', () => {
diff --git a/src/features/pipeline/steps.ts b/src/features/pipeline/steps.ts
index 48c23c0..bdf02a4 100644
--- a/src/features/pipeline/steps.ts
+++ b/src/features/pipeline/steps.ts
@@ -211,7 +211,7 @@ export function submitPullRequest(
   options: Pick<PipelineExecutionOptions, 'task' | 'repo' | 'draftPr'>,
 ): string | undefined {
   info('Creating pull request...');
-  const prTitle = taskContent.issue ? taskContent.issue.title : (options.task ?? 'Pipeline task');
+  const prTitle = taskContent.issue ? `[#${taskContent.issue.number}] ${taskContent.issue.title}` : (options.task ?? 'Pipeline task');
   const report = `Piece \`${piece}\` completed successfully.`;
   const prBody = buildPipelinePrBody(pipelineConfig, taskContent.issue, report);
 
diff --git a/src/features/tasks/execute/postExecution.ts b/src/features/tasks/execute/postExecution.ts
index fbc03b5..00f99ed 100644
--- a/src/features/tasks/execute/postExecution.ts
+++ b/src/features/tasks/execute/postExecution.ts
@@ -103,9 +103,13 @@ export async function postExecutionFlow(options: PostExecutionOptions): Promise<
     } else {
       info('Creating pull request...');
       const prBody = buildPrBody(issues, report);
+      const firstIssue = issues?.[0];
+      const issuePrefix = firstIssue ? `[#${firstIssue.number}] ` : '';
+      const truncatedTask = task.length > 100 - issuePrefix.length ? `${task.slice(0, 100 - issuePrefix.length - 3)}...` : task;
+      const prTitle = issuePrefix + truncatedTask;
       const prResult = createPullRequest(projectCwd, {
         branch,
-        title: task.length > 100 ? `${task.slice(0, 97)}...` : task,
+        title: prTitle,
         body: prBody,
         base: baseBranch,
         repo,
diff --git a/src/infra/task/summarize.ts b/src/infra/task/summarize.ts
index 01f53c9..17ba84f 100644
--- a/src/infra/task/summarize.ts
+++ b/src/infra/task/summarize.ts
@@ -29,9 +29,8 @@ function toRomajiSafely(text: string): string {
       );
     }
     return convertedChunks.join('');
-  } catch {
-    // Avoid blocking branch/task creation on rare parser edge cases or deep recursion
-    // with very long mixed/ASCII inputs.
+  } catch (err) {
+    log.error('Failed to convert to romaji', { error: err, textLength: text.length });
     return text;
   }
 }