diff --git a/ccw/tests/integration/semantic-search.test.ts b/ccw/tests/integration/semantic-search.test.ts
new file mode 100644
index 00000000..989a4ae1
--- /dev/null
+++ b/ccw/tests/integration/semantic-search.test.ts
@@ -0,0 +1,163 @@
+/**
+ * Integration tests for CCW semantic search bridge (memory-embedder-bridge).
+ *
+ * Notes:
+ * - Targets runtime implementations shipped in `ccw/dist`.
+ * - Uses a real temporary SQLite database created by CoreMemoryStore.
+ * - Runs the Python `ccw/scripts/memory_embedder.py` via the CodexLens venv when available.
+ */
+
+import { after, before, describe, it, mock } from 'node:test';
+import assert from 'node:assert/strict';
+import { existsSync, mkdtempSync, rmSync } from 'node:fs';
+import { homedir, tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const CCW_HOME = mkdtempSync(join(tmpdir(), 'ccw-semantic-search-home-'));
+const PROJECT_A = mkdtempSync(join(tmpdir(), 'ccw-semantic-search-project-a-'));
+const PROJECT_B = mkdtempSync(join(tmpdir(), 'ccw-semantic-search-project-b-'));
+
+const VENV_PYTHON =
+  process.platform === 'win32'
+    ? join(homedir(), '.codexlens', 'venv', 'Scripts', 'python.exe')
+    : join(homedir(), '.codexlens', 'venv', 'bin', 'python');
+
+const EMBEDDER_SCRIPT_PATH = fileURLToPath(
+  new URL('../../scripts/memory_embedder.py', import.meta.url),
+);
+
+const EMBEDDER_AVAILABLE = existsSync(VENV_PYTHON) && existsSync(EMBEDDER_SCRIPT_PATH);
+
+const coreMemoryStoreUrl = new URL('../../dist/core/core-memory-store.js', import.meta.url);
+coreMemoryStoreUrl.searchParams.set('t', String(Date.now()));
+
+const embedderBridgeUrl = new URL('../../dist/core/memory-embedder-bridge.js', import.meta.url);
+embedderBridgeUrl.searchParams.set('t', String(Date.now()));
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let storeMod: any;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let bridgeMod: any;
+
+const originalEnv = { CCW_DATA_DIR: process.env.CCW_DATA_DIR };
+
+function insertCoreMemoryChunk(store: any, sourceId: string, chunkIndex: number, content: string): void {
+  store.insertChunk({
+    source_id: sourceId,
+    source_type: 'core_memory',
+    chunk_index: chunkIndex,
+    content,
+  });
+}
+
+describe('semantic search integration (memory-embedder-bridge)', async () => {
+  before(async () => {
+    process.env.CCW_DATA_DIR = CCW_HOME;
+    mock.method(console, 'warn', () => {});
+
+    storeMod = await import(coreMemoryStoreUrl.href);
+    bridgeMod = await import(embedderBridgeUrl.href);
+  });
+
+  after(() => {
+    try {
+      storeMod?.closeAllStores?.();
+    } catch {
+      // ignore
+    }
+    mock.restoreAll();
+    process.env.CCW_DATA_DIR = originalEnv.CCW_DATA_DIR;
+    rmSync(CCW_HOME, { recursive: true, force: true });
+    rmSync(PROJECT_A, { recursive: true, force: true });
+    rmSync(PROJECT_B, { recursive: true, force: true });
+  });
+
+  it(
+    'embeds chunks and performs semantic search with top_k/min_score filtering',
+    { skip: !EMBEDDER_AVAILABLE },
+    async () => {
+      const storeA = storeMod.getCoreMemoryStore(PROJECT_A);
+      const storeB = storeMod.getCoreMemoryStore(PROJECT_B);
+
+      // Project A: two core memories
+      storeA.upsertMemory({
+        id: 'CMEM-SEM-1',
+        content: 'Authentication uses JWT access tokens with refresh tokens.',
+      });
+      insertCoreMemoryChunk(storeA, 'CMEM-SEM-1', 0, 'JWT access token refresh token authentication');
+
+      storeA.upsertMemory({
+        id: 'CMEM-SEM-2',
+        content: 'Database uses SQLite via better-sqlite3.',
+      });
+      insertCoreMemoryChunk(storeA, 'CMEM-SEM-2', 0, 'SQLite better-sqlite3 database layer persistence');
+
+      // Project B: one core memory
+      storeB.upsertMemory({
+        id: 'CMEM-SEM-3',
+        content: 'Frontend uses React components and CSS.',
+      });
+      insertCoreMemoryChunk(storeB, 'CMEM-SEM-3', 0, 'React components CSS frontend UI');
+
+      const dbPathA = storeA.dbPath as string;
+      const dbPathB = storeB.dbPath as string;
+
+      const beforeA = await bridgeMod.getEmbeddingStatus(dbPathA);
+      assert.equal(beforeA.success, true);
+      assert.equal(beforeA.total_chunks, 2);
+
+      const embedA = await bridgeMod.generateEmbeddings(dbPathA, { batchSize: 4 });
+      assert.equal(embedA.success, true);
+      assert.equal(embedA.chunks_failed, 0);
+      assert.ok(embedA.chunks_processed >= 2);
+
+      const embedB = await bridgeMod.generateEmbeddings(dbPathB);
+      assert.equal(embedB.success, true);
+      assert.equal(embedB.chunks_failed, 0);
+      assert.ok(embedB.chunks_processed >= 1);
+
+      const afterA = await bridgeMod.getEmbeddingStatus(dbPathA);
+      assert.equal(afterA.success, true);
+      assert.equal(afterA.embedded_chunks, 2);
+      assert.equal(afterA.pending_chunks, 0);
+      assert.equal(afterA.by_type.core_memory.total, 2);
+
+      // Query should find the JWT-related memory
+      const search = await bridgeMod.searchMemories(dbPathA, 'jwt authentication', {
+        minScore: -1,
+        topK: 10,
+      });
+      assert.equal(search.success, true);
+      assert.ok(Array.isArray(search.matches));
+      assert.ok(search.matches.length > 0);
+      assert.ok(search.matches.some((m: any) => m.source_id === 'CMEM-SEM-1'));
+      assert.ok(search.matches.every((m: any) => typeof m.restore_command === 'string' && m.restore_command.length > 0));
+
+      // top_k should limit results
+      const top1 = await bridgeMod.searchMemories(dbPathA, 'token', { minScore: -1, topK: 1 });
+      assert.equal(top1.success, true);
+      assert.ok(top1.matches.length <= 1);
+
+      // min_score above 1 forces no matches
+      const none = await bridgeMod.searchMemories(dbPathA, 'jwt authentication', { minScore: 1.1, topK: 10 });
+      assert.equal(none.success, true);
+      assert.deepEqual(none.matches, []);
+
+      // Project isolation: React should be found in project B but not in project A
+      const reactA = await bridgeMod.searchMemories(dbPathA, 'react frontend', { minScore: -1, topK: 10 });
+      assert.equal(reactA.success, true);
+      assert.ok(!reactA.matches.some((m: any) => m.source_id === 'CMEM-SEM-3'));
+
+      const reactB = await bridgeMod.searchMemories(dbPathB, 'react frontend', { minScore: -1, topK: 10 });
+      assert.equal(reactB.success, true);
+      assert.ok(reactB.matches.some((m: any) => m.source_id === 'CMEM-SEM-3'));
+
+      // Incremental embed run should not re-embed by default
+      const embedAgain = await bridgeMod.generateEmbeddings(dbPathA);
+      assert.equal(embedAgain.success, true);
+      assert.equal(embedAgain.chunks_failed, 0);
+      assert.equal(embedAgain.chunks_processed, 0);
+    },
+  );
+});