feat: expose workspace registry API

backend/test/routes-sql-meta.test.ts

@@ -85,40 +85,8 @@ test("POST /sessions/:id/sql/preview returns 500 when thtRunner throws", async (
   expect(res.json()).toMatchObject({ error: /boom/ });
 });
 
-// ---------------------------------------------------------------------------
-// Meta routes
-// ---------------------------------------------------------------------------
-
-test("GET /workspaces lists yaml files from ../harness/workspaces", async () => {
-  // The real ../harness/workspaces directory contains *.yaml files.
-  const app = buildApp(loadConfig({ THT_HARNESS_DIR: "../harness" }), {
-    thtRunner: {} as any,
-  });
-
-  const res = await app.inject({ method: "GET", url: "/workspaces" });
-
-  expect(res.statusCode).toBe(200);
-  const body = res.json() as { name: string; file: string }[];
-  expect(Array.isArray(body)).toBe(true);
-  // ../harness/workspaces has at least one yaml (tht-test.yaml / tht.example.yaml)
-  expect(body.length).toBeGreaterThan(0);
-  for (const w of body) {
-    expect(typeof w.name).toBe("string");
-    expect(w.name).not.toContain(".yaml");  // name strips extension
-    expect(w.file).toMatch(/\.ya?ml$/);
-  }
-});
-
-test("GET /workspaces returns [] when harnessDir has no workspaces subdir", async () => {
-  const app = buildApp(loadConfig({ THT_HARNESS_DIR: "/nonexistent-harness-dir" }), {
-    thtRunner: {} as any,
-  });
-
-  const res = await app.inject({ method: "GET", url: "/workspaces" });
-
-  expect(res.statusCode).toBe(200);
-  expect(res.json()).toEqual([]);
-});
+// Workspace registry route coverage lives in routes-workspaces.test.ts. `/workspaces` no longer
+// reads legacy harness files: the Git registry is the single shared source of truth.
 
 test("GET /models returns {models:[...]} from injected listModels stub", async () => {
   const app = buildApp(loadConfig({ THT_HARNESS_DIR: "../harness" }), {