Add tests and documentation for --shared hooks feature

- Fix existing tests to work with new installHooks signature
- Add TestInstallHooksShared to verify shared hooks functionality
- Update git-hooks README with comprehensive --shared documentation
- Document benefits, use cases, and workflow for shared hooks

cmd/bd/hooks_test.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"os"
+	"os/exec"
 	"path/filepath"
 	"runtime"
 	"testing"
@@ -50,7 +51,7 @@ func TestInstallHooks(t *testing.T) {
 	}
 
 	// Install hooks
-	if err := installHooks(hooks, false); err != nil {
+	if err := installHooks(hooks, false, false); err != nil {
 		t.Fatalf("installHooks() failed: %v", err)
 	}
 
@@ -103,7 +104,7 @@ func TestInstallHooksBackup(t *testing.T) {
 	}
 
 	// Install hooks (should backup existing)
-	if err := installHooks(hooks, false); err != nil {
+	if err := installHooks(hooks, false, false); err != nil {
 		t.Fatalf("installHooks() failed: %v", err)
 	}
 
@@ -149,7 +150,7 @@ func TestInstallHooksForce(t *testing.T) {
 	}
 
 	// Install hooks with force (should not create backup)
-	if err := installHooks(hooks, true); err != nil {
+	if err := installHooks(hooks, true, false); err != nil {
 		t.Fatalf("installHooks() failed: %v", err)
 	}
 
@@ -178,7 +179,7 @@ func TestUninstallHooks(t *testing.T) {
 	if err != nil {
 		t.Fatalf("getEmbeddedHooks() failed: %v", err)
 	}
-	if err := installHooks(hooks, false); err != nil {
+	if err := installHooks(hooks, false, false); err != nil {
 		t.Fatalf("installHooks() failed: %v", err)
 	}
 
@@ -224,7 +225,7 @@ func TestHooksCheckGitHooks(t *testing.T) {
 	if err != nil {
 		t.Fatalf("getEmbeddedHooks() failed: %v", err)
 	}
-	if err := installHooks(hooks, false); err != nil {
+	if err := installHooks(hooks, false, false); err != nil {
 		t.Fatalf("installHooks() failed: %v", err)
 	}
 
@@ -243,3 +244,60 @@ func TestHooksCheckGitHooks(t *testing.T) {
 		}
 	}
 }
+
+func TestInstallHooksShared(t *testing.T) {
+	// Create temp directory
+	tmpDir := t.TempDir()
+
+	// Change to temp directory
+	oldWd, _ := os.Getwd()
+	defer os.Chdir(oldWd)
+	os.Chdir(tmpDir)
+
+	// Initialize a real git repo (needed for git config command)
+	if err := exec.Command("git", "init").Run(); err != nil {
+		t.Skipf("Skipping test: git init failed (git may not be available): %v", err)
+	}
+
+	// Get embedded hooks
+	hooks, err := getEmbeddedHooks()
+	if err != nil {
+		t.Fatalf("getEmbeddedHooks() failed: %v", err)
+	}
+
+	// Install hooks in shared mode
+	if err := installHooks(hooks, false, true); err != nil {
+		t.Fatalf("installHooks() with shared=true failed: %v", err)
+	}
+
+	// Verify hooks were installed to .beads-hooks/
+	sharedHooksDir := ".beads-hooks"
+	for hookName := range hooks {
+		hookPath := filepath.Join(sharedHooksDir, hookName)
+		if _, err := os.Stat(hookPath); os.IsNotExist(err) {
+			t.Errorf("Hook %s was not installed to .beads-hooks/", hookName)
+		}
+		// Windows does not support POSIX executable bits, so skip the check there.
+		if runtime.GOOS == "windows" {
+			continue
+		}
+
+		info, err := os.Stat(hookPath)
+		if err != nil {
+			t.Errorf("Failed to stat %s: %v", hookName, err)
+			continue
+		}
+		if info.Mode()&0111 == 0 {
+			t.Errorf("Hook %s is not executable", hookName)
+		}
+	}
+
+	// Verify hooks were NOT installed to .git/hooks/
+	standardHooksDir := filepath.Join(".git", "hooks")
+	for hookName := range hooks {
+		hookPath := filepath.Join(standardHooksDir, hookName)
+		if _, err := os.Stat(hookPath); !os.IsNotExist(err) {
+			t.Errorf("Hook %s should not be in .git/hooks/ when using --shared", hookName)
+		}
+	}
+}

examples/git-hooks/README.md

@@ -51,6 +51,36 @@ The installer will:
 - Make them executable
 - Detect and preserve existing hooks
 
+### Shared Hooks for Teams (New in v0.24.3)
+
+For teams that need to share hooks across members (especially when using pre-built containers or CI/CD):
+
+```bash
+bd hooks install --shared
+```
+
+This installs hooks to `.beads-hooks/` (a versioned directory) instead of `.git/hooks/`, and configures git to use them via `git config core.hooksPath .beads-hooks`.
+
+**Benefits:**
+- ✅ Hooks are versioned and can be committed to your repository
+- ✅ Team members get hooks automatically when they clone/pull
+- ✅ Security teams can scan and audit hook contents before deployment
+- ✅ Works with pre-built containers (hooks are already in the repo)
+- ✅ Hooks stay in sync when you run `bd hooks install --shared` after upgrades
+
+**Use cases:**
+- Teams building containers in CI that need hooks pre-installed
+- Organizations requiring security scanning of all code (including hooks)
+- Projects where consistent tooling across team members is critical
+- Devcontainer workflows where bd is installed during container build
+
+After running `bd hooks install --shared`, commit `.beads-hooks/` to your repository:
+
+```bash
+git add .beads-hooks/
+git commit -m "Add bd git hooks for team"
+```
+
 ### Manual Install
 
 ```bash