fix(clv2): use -e instead of -d for .git check in detect-project.sh

In git worktrees, .git is a file (not a directory) containing a gitdir
pointer. The -d test fails for worktree checkouts, causing project
detection to fall through to the "global" fallback. Changing to -e
(exists) handles both regular repos and worktrees correctly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

skills/continuous-learning-v2/scripts/detect-project.sh

@@ -85,7 +85,7 @@ _clv2_detect_project() {
   # fall back to path hash (machine-specific but still useful)
   local remote_url=""
   if command -v git &>/dev/null; then
-    if [ "$source_hint" = "git" ] || [ -d "${project_root}/.git" ]; then
+    if [ "$source_hint" = "git" ] || [ -e "${project_root}/.git" ]; then
       remote_url=$(git -C "$project_root" remote get-url origin 2>/dev/null || true)
     fi
   fi

tests/hooks/detect-project-worktree.test.js

@@ -0,0 +1,239 @@
+/**
+ * Tests for worktree project-ID mismatch fix
+ *
+ * Validates that detect-project.sh uses -e (not -d) for .git existence
+ * checks, so that git worktrees (where .git is a file) are detected
+ * correctly.
+ *
+ * Run with: node tests/hooks/detect-project-worktree.test.js
+ */
+
+const assert = require('assert');
+const path = require('path');
+const fs = require('fs');
+const os = require('os');
+const { execSync } = require('child_process');
+
+let passed = 0;
+let failed = 0;
+
+function test(name, fn) {
+  try {
+    fn();
+    console.log(`  \u2713 ${name}`);
+    passed++;
+  } catch (err) {
+    console.log(`  \u2717 ${name}`);
+    console.log(`    Error: ${err.message}`);
+    failed++;
+  }
+}
+
+function createTempDir() {
+  return fs.mkdtempSync(path.join(os.tmpdir(), 'ecc-worktree-test-'));
+}
+
+function cleanupDir(dir) {
+  try {
+    fs.rmSync(dir, { recursive: true, force: true });
+  } catch {
+    // ignore cleanup errors
+  }
+}
+
+const repoRoot = path.resolve(__dirname, '..', '..');
+const detectProjectPath = path.join(
+  repoRoot,
+  'skills',
+  'continuous-learning-v2',
+  'scripts',
+  'detect-project.sh'
+);
+
+console.log('\n=== Worktree Project-ID Mismatch Tests ===\n');
+
+// ──────────────────────────────────────────────────────
+// Group 1: Content checks on detect-project.sh
+// ──────────────────────────────────────────────────────
+
+console.log('--- Content checks on detect-project.sh ---');
+
+test('uses -e (not -d) for .git existence check', () => {
+  const content = fs.readFileSync(detectProjectPath, 'utf8');
+  assert.ok(
+    content.includes('[ -e "${project_root}/.git" ]'),
+    'detect-project.sh should use -e for .git check'
+  );
+  assert.ok(
+    !content.includes('[ -d "${project_root}/.git" ]'),
+    'detect-project.sh should NOT use -d for .git check'
+  );
+});
+
+test('has command -v git fallback check', () => {
+  const content = fs.readFileSync(detectProjectPath, 'utf8');
+  assert.ok(
+    content.includes('command -v git'),
+    'detect-project.sh should check for git availability with command -v'
+  );
+});
+
+test('uses git -C for safe directory operations', () => {
+  const content = fs.readFileSync(detectProjectPath, 'utf8');
+  assert.ok(
+    content.includes('git -C'),
+    'detect-project.sh should use git -C for directory-scoped operations'
+  );
+});
+
+// ──────────────────────────────────────────────────────
+// Group 2: Behavior test — -e vs -d
+// ──────────────────────────────────────────────────────
+
+console.log('\n--- Behavior test: -e vs -d ---');
+
+const behaviorDir = createTempDir();
+
+test('[ -d ] returns true for .git directory', () => {
+  const dir = path.join(behaviorDir, 'test-d-dir');
+  fs.mkdirSync(dir, { recursive: true });
+  fs.mkdirSync(path.join(dir, '.git'));
+  const result = execSync(`bash -c '[ -d "${dir}/.git" ] && echo yes || echo no'`).toString().trim();
+  assert.strictEqual(result, 'yes');
+});
+
+test('[ -d ] returns false for .git file', () => {
+  const dir = path.join(behaviorDir, 'test-d-file');
+  fs.mkdirSync(dir, { recursive: true });
+  fs.writeFileSync(path.join(dir, '.git'), 'gitdir: /some/path\n');
+  const result = execSync(`bash -c '[ -d "${dir}/.git" ] && echo yes || echo no'`).toString().trim();
+  assert.strictEqual(result, 'no');
+});
+
+test('[ -e ] returns true for .git directory', () => {
+  const dir = path.join(behaviorDir, 'test-e-dir');
+  fs.mkdirSync(dir, { recursive: true });
+  fs.mkdirSync(path.join(dir, '.git'));
+  const result = execSync(`bash -c '[ -e "${dir}/.git" ] && echo yes || echo no'`).toString().trim();
+  assert.strictEqual(result, 'yes');
+});
+
+test('[ -e ] returns true for .git file', () => {
+  const dir = path.join(behaviorDir, 'test-e-file');
+  fs.mkdirSync(dir, { recursive: true });
+  fs.writeFileSync(path.join(dir, '.git'), 'gitdir: /some/path\n');
+  const result = execSync(`bash -c '[ -e "${dir}/.git" ] && echo yes || echo no'`).toString().trim();
+  assert.strictEqual(result, 'yes');
+});
+
+test('[ -e ] returns false when .git does not exist', () => {
+  const dir = path.join(behaviorDir, 'test-e-none');
+  fs.mkdirSync(dir, { recursive: true });
+  const result = execSync(`bash -c '[ -e "${dir}/.git" ] && echo yes || echo no'`).toString().trim();
+  assert.strictEqual(result, 'no');
+});
+
+cleanupDir(behaviorDir);
+
+// ──────────────────────────────────────────────────────
+// Group 3: E2E test — detect-project.sh with worktree .git file
+// ──────────────────────────────────────────────────────
+
+console.log('\n--- E2E: detect-project.sh with worktree .git file ---');
+
+test('detect-project.sh sets PROJECT_NAME and non-global PROJECT_ID for worktree', () => {
+  const testDir = createTempDir();
+
+  try {
+    // Create a "main" repo with git init so we have real git structures
+    const mainRepo = path.join(testDir, 'main-repo');
+    fs.mkdirSync(mainRepo, { recursive: true });
+    execSync('git init', { cwd: mainRepo, stdio: 'pipe' });
+    execSync('git commit --allow-empty -m "init"', {
+      cwd: mainRepo,
+      stdio: 'pipe',
+      env: {
+        ...process.env,
+        GIT_AUTHOR_NAME: 'Test',
+        GIT_AUTHOR_EMAIL: 'test@test.com',
+        GIT_COMMITTER_NAME: 'Test',
+        GIT_COMMITTER_EMAIL: 'test@test.com'
+      }
+    });
+
+    // Create a worktree-like directory with .git as a file
+    const worktreeDir = path.join(testDir, 'my-worktree');
+    fs.mkdirSync(worktreeDir, { recursive: true });
+
+    // Set up the worktree directory structure in the main repo
+    const worktreesDir = path.join(mainRepo, '.git', 'worktrees', 'my-worktree');
+    fs.mkdirSync(worktreesDir, { recursive: true });
+
+    // Create the gitdir file and commondir in the worktree metadata
+    const mainGitDir = path.join(mainRepo, '.git');
+    fs.writeFileSync(
+      path.join(worktreesDir, 'commondir'),
+      '../..\n'
+    );
+    fs.writeFileSync(
+      path.join(worktreesDir, 'HEAD'),
+      fs.readFileSync(path.join(mainGitDir, 'HEAD'), 'utf8')
+    );
+
+    // Write .git file in the worktree directory (this is what git worktree creates)
+    fs.writeFileSync(
+      path.join(worktreeDir, '.git'),
+      `gitdir: ${worktreesDir}\n`
+    );
+
+    // Source detect-project.sh from the worktree directory and capture results
+    const script = `
+      export CLAUDE_PROJECT_DIR="${worktreeDir}"
+      export HOME="${testDir}"
+      source "${detectProjectPath}"
+      echo "PROJECT_NAME=\${PROJECT_NAME}"
+      echo "PROJECT_ID=\${PROJECT_ID}"
+    `;
+
+    const result = execSync(`bash -c '${script.replace(/'/g, "'\\''")}'`, {
+      cwd: worktreeDir,
+      timeout: 10000,
+      env: {
+        ...process.env,
+        HOME: testDir,
+        CLAUDE_PROJECT_DIR: worktreeDir
+      }
+    }).toString();
+
+    const lines = result.trim().split('\n');
+    const vars = {};
+    for (const line of lines) {
+      const match = line.match(/^(PROJECT_NAME|PROJECT_ID)=(.*)$/);
+      if (match) {
+        vars[match[1]] = match[2];
+      }
+    }
+
+    assert.ok(
+      vars.PROJECT_NAME && vars.PROJECT_NAME.length > 0,
+      `PROJECT_NAME should be set, got: "${vars.PROJECT_NAME || ''}"`
+    );
+    assert.ok(
+      vars.PROJECT_ID && vars.PROJECT_ID !== 'global',
+      `PROJECT_ID should not be "global", got: "${vars.PROJECT_ID || ''}"`
+    );
+  } finally {
+    cleanupDir(testDir);
+  }
+});
+
+// ──────────────────────────────────────────────────────
+// Summary
+// ──────────────────────────────────────────────────────
+
+console.log('\n=== Test Results ===');
+console.log(`Passed: ${passed}`);
+console.log(`Failed: ${failed}`);
+console.log(`Total:  ${passed + failed}\n`);
+
+process.exit(failed > 0 ? 1 : 0);