Initial implementation of Claude Code hooks in Go

- Easy-to-use hook registration system
- Built-in hooks for bash validation, file protection, and logging
- Automatic goimports formatting for modified Go files
- CLI with install/uninstall commands
- Comprehensive documentation and examples

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

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

cmd/install.go

@@ -0,0 +1,71 @@
+package cmd
+
+import (
+	"fmt"
+	"log/slog"
+	"os"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+	"github.com/imjasonh/hooks/internal/config"
+)
+
+var (
+	uninstall bool
+	installCmd = &cobra.Command{
+		Use:   "install",
+		Short: "Install hooks to Claude settings",
+		Long: `Install this binary as a hook handler in your Claude settings.
+
+This command will:
+1. Find or create ~/.claude/settings.json
+2. Add this binary to handle all hook events
+3. Configure it to match all tools
+
+Use --uninstall to remove the hooks.`,
+		RunE: runInstall,
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(installCmd)
+	installCmd.Flags().BoolVar(&uninstall, "uninstall", false, "Remove hooks from Claude settings")
+}
+
+func runInstall(cmd *cobra.Command, args []string) error {
+	executable, err := os.Executable()
+	if err != nil {
+		return fmt.Errorf("failed to get executable path: %w", err)
+	}
+
+	executable, err = filepath.Abs(executable)
+	if err != nil {
+		return fmt.Errorf("failed to get absolute path: %w", err)
+	}
+
+	if uninstall {
+		slog.Info("uninstalling hooks", "binary", executable)
+		if err := config.UninstallHooks(executable); err != nil {
+			return fmt.Errorf("failed to uninstall hooks: %w", err)
+		}
+		fmt.Println("✓ Hooks uninstalled successfully")
+		return nil
+	}
+
+	slog.Info("installing hooks", "binary", executable)
+	if err := config.InstallHooks(executable); err != nil {
+		return fmt.Errorf("failed to install hooks: %w", err)
+	}
+
+	settingsPath := config.GetSettingsPath()
+	fmt.Printf("✓ Hooks installed successfully\n")
+	fmt.Printf("  Binary: %s\n", executable)
+	fmt.Printf("  Settings: %s\n", settingsPath)
+	fmt.Printf("\nThe following hooks are now active:\n")
+	fmt.Println("  • pre_tool_use: Validates bash commands and prevents sensitive file edits")
+	fmt.Println("  • post_tool_use: Logs tool usage and runs goimports on modified Go files")
+	fmt.Println("  • user_prompt_submit: Adds project context to prompts")
+	fmt.Println("\nTo test: echo '{\"event\":\"pre_tool_use\",\"tool\":\"Bash\",\"tool_use_request\":{\"tool\":\"Bash\",\"parameters\":{\"command\":\"ls\"}}}' | hooks run")
+
+	return nil
+}