test: raise timeout ceiling for I/O-bound tests flaky under CI contention

packages/cli/vitest.config.ts

@@ -112,6 +112,10 @@ export default defineConfig({
     },
   },
   test: {
+    // See packages/core/vitest.config.ts: raise the per-test ceiling above
+    // vitest's 5s default so I/O-bound tests (e.g. the workspace registration
+    // store's tempdir round-trip) don't blow it purely under CI contention.
+    testTimeout: 15000,
     include: ['**/*.{test,spec}.?(c|m)[jt]s?(x)', 'config.test.ts'],
     exclude: ['**/node_modules/**', '**/dist/**', '**/cypress/**'],
     environment: 'jsdom',

packages/core/src/extension/github.test.ts

@@ -2075,9 +2075,14 @@ describe('git extension helpers', () => {
     }
 
     async function waitForFileData(filePath: string): Promise<void> {
-      for (let attempt = 0; attempt < 1_000; attempt += 1) {
+      // Poll on a real wall-clock budget (~10s), not a fixed iteration count:
+      // setImmediate turns are sub-millisecond, so 1_000 of them could elapse
+      // in <100ms while the tar extraction I/O is still catching up on a
+      // contended runner — the source of the "Timed out waiting for extracted
+      // data" flake. Stays well under the 15s per-test ceiling.
+      for (let attempt = 0; attempt < 2_000; attempt += 1) {
         if ((await getFileSize(filePath)) > 0) return;
-        await new Promise((resolve) => setImmediate(resolve));
+        await new Promise((resolve) => setTimeout(resolve, 5));
       }
       throw new Error(`Timed out waiting for extracted data at ${filePath}`);
     }

packages/core/vitest.config.ts

@@ -8,6 +8,12 @@ import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
   test: {
+    // Raise the per-test ceiling above vitest's 5s default: the self-hosted
+    // CI runners are heavily oversubscribed (maxThreads: 16 below), and I/O-
+    // or WASM-load-bound tests (e.g. the web-tree-sitter lazy runtime, tar
+    // extraction) blow 5s purely under contention, not from any logic fault.
+    // Assertions still fail instantly; only the timeout ceiling grows.
+    testTimeout: 15000,
     reporters: ['default', 'junit'],
     silent: true,
     setupFiles: ['./test-setup.ts'],