fix: respect home overrides in hook utilities

WORKING-CONTEXT.md

@@ -127,3 +127,4 @@ Keep this file detailed for only the current sprint, blockers, and next actions.
 - 2026-04-02: Direct-ported the safe web/frontend rules lane from `#1122` into `rules/web/`, but adapted `rules/web/hooks.md` to prefer project-local tooling and avoid remote one-off package execution examples.
 - 2026-04-02: Adapted the design-quality reminder from `#1127` into the current ECC hook architecture with a local `scripts/hooks/design-quality-check.js`, Claude `hooks/hooks.json` wiring, Cursor `after-file-edit.js` wiring, and dedicated hook coverage in `tests/hooks/design-quality-check.test.js`.
 - 2026-04-02: Fixed `#1141` on `main` in `16e9b17`. The observer lifecycle is now session-aware instead of purely detached: `SessionStart` writes a project-scoped lease, `SessionEnd` removes that lease and stops the observer when the final lease disappears, `observe.sh` records project activity, and `observer-loop.sh` now exits on idle when no leases remain. Targeted validation passed with `bash -n`, `node tests/hooks/observer-memory.test.js`, `node tests/integration/hooks.test.js`, `node scripts/ci/validate-hooks.js hooks/hooks.json`, and `node scripts/ci/check-unicode-safety.js`.
+- 2026-04-02: Fixed the remaining Windows-only hook regression behind `#1070` by making `scripts/lib/utils.js#getHomeDir()` honor explicit `HOME` / `USERPROFILE` overrides before falling back to `os.homedir()`. This restores test-isolated observer state paths for hook integration runs on Windows. Added regression coverage in `tests/lib/utils.test.js`. Targeted validation passed with `node tests/lib/utils.test.js`, `node tests/integration/hooks.test.js`, `node tests/hooks/observer-memory.test.js`, and `node scripts/ci/check-unicode-safety.js`.

scripts/lib/utils.js

@@ -25,6 +25,10 @@ const WINDOWS_RESERVED_SESSION_IDS = new Set([
  * Get the user's home directory (cross-platform)
  */
 function getHomeDir() {
+  const explicitHome = process.env.HOME || process.env.USERPROFILE;
+  if (explicitHome && explicitHome.trim().length > 0) {
+    return path.resolve(explicitHome);
+  }
   return os.homedir();
 }
 

tests/lib/utils.test.js

@@ -60,6 +60,50 @@ function runTests() {
     assert.ok(fs.existsSync(home), 'Home dir should exist');
   })) passed++; else failed++;
 
+  if (test('getHomeDir prefers HOME override when set', () => {
+    const originalHome = process.env.HOME;
+    const originalUserProfile = process.env.USERPROFILE;
+    const fakeHome = path.join(process.cwd(), 'tmp-home-override');
+    try {
+      process.env.HOME = fakeHome;
+      process.env.USERPROFILE = '';
+      assert.strictEqual(utils.getHomeDir(), fakeHome);
+    } finally {
+      if (originalHome === undefined) {
+        delete process.env.HOME;
+      } else {
+        process.env.HOME = originalHome;
+      }
+      if (originalUserProfile === undefined) {
+        delete process.env.USERPROFILE;
+      } else {
+        process.env.USERPROFILE = originalUserProfile;
+      }
+    }
+  })) passed++; else failed++;
+
+  if (test('getHomeDir falls back to USERPROFILE when HOME is empty', () => {
+    const originalHome = process.env.HOME;
+    const originalUserProfile = process.env.USERPROFILE;
+    const fakeHome = path.join(process.cwd(), 'tmp-userprofile-override');
+    try {
+      process.env.HOME = '';
+      process.env.USERPROFILE = fakeHome;
+      assert.strictEqual(utils.getHomeDir(), fakeHome);
+    } finally {
+      if (originalHome === undefined) {
+        delete process.env.HOME;
+      } else {
+        process.env.HOME = originalHome;
+      }
+      if (originalUserProfile === undefined) {
+        delete process.env.USERPROFILE;
+      } else {
+        process.env.USERPROFILE = originalUserProfile;
+      }
+    }
+  })) passed++; else failed++;
+
   if (test('getClaudeDir returns path under home', () => {
     const claudeDir = utils.getClaudeDir();
     const homeDir = utils.getHomeDir();