feat(doctor): Add hooks-path-configured check

Verifies all clones have core.hooksPath set to .githooks.
Auto-fixable with 'gt doctor --fix'.

This ensures the pre-push hook is active on all clones,
blocking pushes to invalid branches (no internal PRs).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/doctor/rig_check.go

@@ -231,6 +231,126 @@ func (c *GitExcludeConfiguredCheck) Fix(ctx *CheckContext) error {
 	return nil
 }
 
+// HooksPathConfiguredCheck verifies all clones have core.hooksPath set to .githooks.
+// This ensures the pre-push hook blocks pushes to invalid branches (no internal PRs).
+type HooksPathConfiguredCheck struct {
+	FixableCheck
+	unconfiguredClones []string
+}
+
+// NewHooksPathConfiguredCheck creates a new hooks path check.
+func NewHooksPathConfiguredCheck() *HooksPathConfiguredCheck {
+	return &HooksPathConfiguredCheck{
+		FixableCheck: FixableCheck{
+			BaseCheck: BaseCheck{
+				CheckName:        "hooks-path-configured",
+				CheckDescription: "Check core.hooksPath is set for all clones",
+			},
+		},
+	}
+}
+
+// Run checks if all clones have core.hooksPath configured.
+func (c *HooksPathConfiguredCheck) Run(ctx *CheckContext) *CheckResult {
+	rigPath := ctx.RigPath()
+	if rigPath == "" {
+		return &CheckResult{
+			Name:    c.Name(),
+			Status:  StatusError,
+			Message: "No rig specified",
+		}
+	}
+
+	c.unconfiguredClones = nil
+
+	// Check all clone locations
+	clonePaths := []string{
+		filepath.Join(rigPath, "mayor", "rig"),
+		filepath.Join(rigPath, "refinery", "rig"),
+	}
+
+	// Add crew clones
+	crewDir := filepath.Join(rigPath, "crew")
+	if entries, err := os.ReadDir(crewDir); err == nil {
+		for _, entry := range entries {
+			if entry.IsDir() {
+				clonePaths = append(clonePaths, filepath.Join(crewDir, entry.Name()))
+			}
+		}
+	}
+
+	// Add polecat clones
+	polecatDir := filepath.Join(rigPath, "polecats")
+	if entries, err := os.ReadDir(polecatDir); err == nil {
+		for _, entry := range entries {
+			if entry.IsDir() {
+				clonePaths = append(clonePaths, filepath.Join(polecatDir, entry.Name()))
+			}
+		}
+	}
+
+	for _, clonePath := range clonePaths {
+		// Skip if not a git repo
+		if _, err := os.Stat(filepath.Join(clonePath, ".git")); os.IsNotExist(err) {
+			continue
+		}
+
+		// Skip if no .githooks directory exists
+		if _, err := os.Stat(filepath.Join(clonePath, ".githooks")); os.IsNotExist(err) {
+			continue
+		}
+
+		// Check core.hooksPath
+		cmd := exec.Command("git", "-C", clonePath, "config", "--get", "core.hooksPath")
+		output, err := cmd.Output()
+		if err != nil || strings.TrimSpace(string(output)) != ".githooks" {
+			// Get relative path for cleaner output
+			relPath, _ := filepath.Rel(rigPath, clonePath)
+			if relPath == "" {
+				relPath = clonePath
+			}
+			c.unconfiguredClones = append(c.unconfiguredClones, clonePath)
+		}
+	}
+
+	if len(c.unconfiguredClones) == 0 {
+		return &CheckResult{
+			Name:    c.Name(),
+			Status:  StatusOK,
+			Message: "All clones have hooks configured",
+		}
+	}
+
+	// Build details with relative paths
+	var details []string
+	for _, clonePath := range c.unconfiguredClones {
+		relPath, _ := filepath.Rel(rigPath, clonePath)
+		if relPath == "" {
+			relPath = clonePath
+		}
+		details = append(details, relPath)
+	}
+
+	return &CheckResult{
+		Name:    c.Name(),
+		Status:  StatusWarning,
+		Message: fmt.Sprintf("%d clone(s) missing hooks configuration", len(c.unconfiguredClones)),
+		Details: details,
+		FixHint: "Run 'gt doctor --fix' to configure hooks",
+	}
+}
+
+// Fix configures core.hooksPath for all unconfigured clones.
+func (c *HooksPathConfiguredCheck) Fix(ctx *CheckContext) error {
+	for _, clonePath := range c.unconfiguredClones {
+		cmd := exec.Command("git", "-C", clonePath, "config", "core.hooksPath", ".githooks")
+		if err := cmd.Run(); err != nil {
+			return fmt.Errorf("failed to configure hooks for %s: %w", clonePath, err)
+		}
+	}
+	return nil
+}
+
 // WitnessExistsCheck verifies the witness directory structure exists.
 type WitnessExistsCheck struct {
 	FixableCheck
@@ -750,6 +870,7 @@ func RigChecks() []Check {
 	return []Check{
 		NewRigIsGitRepoCheck(),
 		NewGitExcludeConfiguredCheck(),
+		NewHooksPathConfiguredCheck(),
 		NewWitnessExistsCheck(),
 		NewRefineryExistsCheck(),
 		NewMayorCloneExistsCheck(),