fix(memory): FTS5-safe search-term quoting — "TSK-0037"-style queries no longer crash (TSK-0043)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/core/index.ts

@@ -101,6 +101,8 @@ export class Index {
   }
 
   search(query: string): Array<{ id: string; type: string; title: string }> {
+    const ftsQuery = toFts5Phrase(query);
+    if (!ftsQuery) return [];
     const stmt = this.db.prepare(`
       SELECT e.id, e.type, e.title
       FROM search s
@@ -108,7 +110,7 @@ export class Index {
       WHERE search MATCH @query
       ORDER BY rank
     `);
-    return stmt.all({ query }) as Array<{ id: string; type: string; title: string }>;
+    return stmt.all({ query: ftsQuery }) as Array<{ id: string; type: string; title: string }>;
   }
 
   list(type?: string, filters?: { status?: string; role?: string; assignedTo?: string }): IndexEntry[] {
@@ -162,3 +164,9 @@ export class Index {
     this.db.close();
   }
 }
+
+function toFts5Phrase(query: string): string {
+  const trimmed = query.trim();
+  if (!trimmed) return '';
+  return `"${trimmed.replace(/"/g, '""')}"`;
+}

tests/memoryService.test.ts

@@ -18,6 +18,29 @@ describe('memoryService', () => {
     expect(listMemory(cwd)).toHaveLength(1);
   });
 
+  it('searches literal task IDs and other FTS5-special strings without throwing', () => {
+    addMemory(cwd, {
+      title: 'TSK-0037 result',
+      category: 'implementation',
+      content: 'Linked HOF-0030 and a:b plus foo-bar all belong to this note.',
+    });
+
+    expect(searchMemory(cwd, 'TSK-0037')).toHaveLength(1);
+    expect(searchMemory(cwd, 'HOF-0030')).toHaveLength(1);
+    expect(searchMemory(cwd, 'a:b')).toHaveLength(1);
+    expect(searchMemory(cwd, 'foo-bar')).toHaveLength(1);
+    expect(searchMemory(cwd, 'TTL')).toHaveLength(0);
+  });
+
+  it('keeps normal word search functional after FTS5 quoting', () => {
+    addMemory(cwd, { title: 'DNS cache', category: 'technical', content: 'Use TTL' });
+    addMemory(cwd, { title: 'Other note', category: 'technical', content: 'No cache keyword here' });
+
+    const results = searchMemory(cwd, 'TTL');
+    expect(results).toHaveLength(1);
+    expect(results[0].title).toBe('DNS cache');
+  });
+
   it('stores relatedTasks in the memory object', () => {
     const m = addMemory(cwd, {
       title: 'TTL lesson',