settingSources に project を追加し、CLAUDE.md の読み込みを SDK に委譲

手動で CLAUDE.md を読み込んでいた loadProjectContext を削除し、
SDK の settingSources: ['project'] でプロジェクトコンテキストを自動解決するよう変更

src/__tests__/permission-mode.test.ts

@@ -103,3 +103,10 @@ describe('SdkOptionsBuilder.build() — mcpServers', () => {
     expect(sdkOptions.permissionMode).toBe('acceptEdits');
   });
 });
+
+describe('SdkOptionsBuilder.build() — settingSources', () => {
+  it('includes project in settingSources', () => {
+    const options = buildSdkOptions({ cwd: '/test' });
+    expect(options.settingSources).toEqual(['project']);
+  });
+});

src/infra/claude/options-builder.ts

@@ -57,6 +57,7 @@ export class SdkOptionsBuilder {
     const sdkOptions: Options = {
       cwd: this.options.cwd,
       permissionMode,
+      settingSources: ['project'],
     };
 
     if (this.options.model) sdkOptions.model = this.options.model;

src/infra/fs/index.ts

@@ -26,5 +26,4 @@ export {
   createSessionLog,
   finalizeSessionLog,
   loadSessionLog,
-  loadProjectContext,
 } from './session.js';

src/infra/fs/session.ts

@@ -198,23 +198,6 @@ export class SessionManager {
     return JSON.parse(content) as SessionLog;
   }
 
-  /** Load project context (CLAUDE.md files) */
-  loadProjectContext(projectDir: string): string {
-    const contextParts: string[] = [];
-
-    const rootClaudeMd = join(projectDir, 'CLAUDE.md');
-    if (existsSync(rootClaudeMd)) {
-      contextParts.push(readFileSync(rootClaudeMd, 'utf-8'));
-    }
-
-    const dotClaudeMd = join(projectDir, '.claude', 'CLAUDE.md');
-    if (existsSync(dotClaudeMd)) {
-      contextParts.push(readFileSync(dotClaudeMd, 'utf-8'));
-    }
-
-    return contextParts.join('\n\n---\n\n');
-  }
-
 }
 
 const defaultManager = new SessionManager();
@@ -265,10 +248,6 @@ export function loadSessionLog(filepath: string): SessionLog | null {
   return defaultManager.loadSessionLog(filepath);
 }
 
-export function loadProjectContext(projectDir: string): string {
-  return defaultManager.loadProjectContext(projectDir);
-}
-
 /**
  * Extract failure information from an NDJSON session log file.
  *