feat(cmd): add recipe run command

Implement the `recipe` command with `run` subcommand for executing transactional recipes.

- Resolve recipe paths: explicit, project-local (.grokkit/recipes), or global (~/.local/share/grokkit/recipes) with user prompt.
- Load and parse recipes using internal/recipe package.
- Integrate with root command and project root detection.

cmd/recipe.go

@@ -0,0 +1,120 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"repos.gmgauthier.com/gmgauthier/grokkit/internal/recipe" // adjust if your module name differs
+)
+
+var recipeCmd = &cobra.Command{
+	Use:   "recipe",
+	Short: "Run a recipe (transactional sous-chef mode)",
+}
+
+var runCmd = &cobra.Command{
+	Use:   "run [recipe-name|recipe.md]",
+	Short: "Execute a recipe",
+	Args:  cobra.MinimumNArgs(1),
+	RunE:  runRecipe,
+}
+
+func init() {
+	recipeCmd.AddCommand(runCmd)
+	rootCmd.AddCommand(recipeCmd) // this is how every other command is wired in your project
+}
+
+func runRecipe(cmd *cobra.Command, args []string) error {
+	nameOrPath := args[0]
+
+	// 1. Resolve recipe path (your exact rules)
+	recipePath, err := resolveRecipePath(nameOrPath)
+	if err != nil {
+		return err
+	}
+
+	// 2. For now we pass empty params (we'll add --param later)
+	params := make(map[string]any)
+
+	// 3. Load & parse
+	r, err := recipe.Load(recipePath, params)
+	if err != nil {
+		return fmt.Errorf("failed to load recipe: %w", err)
+	}
+
+	// 4. Run it
+	runner := recipe.NewRunner(r)
+	if err := runner.Run(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// resolveRecipePath implements exactly what you asked for
+func resolveRecipePath(nameOrPath string) (string, error) {
+	// explicit path?
+	if strings.Contains(nameOrPath, "/") || strings.HasSuffix(nameOrPath, ".md") {
+		if _, err := os.Stat(nameOrPath); err == nil {
+			return nameOrPath, nil
+		}
+		return "", fmt.Errorf("recipe file not found: %s", nameOrPath)
+	}
+
+	// normalise name
+	if !strings.HasSuffix(nameOrPath, ".md") {
+		nameOrPath += ".md"
+	}
+
+	// 1. Project-local first (primary source of truth)
+	projectRoot, err := findProjectRoot()
+	if err == nil {
+		local := filepath.Join(projectRoot, ".grokkit", "recipes", nameOrPath)
+		if _, err := os.Stat(local); err == nil {
+			return local, nil
+		}
+	}
+
+	// 2. Global XDG fallback
+	global := filepath.Join(os.Getenv("HOME"), ".local", "share", "grokkit", "recipes", nameOrPath)
+	if _, err := os.Stat(global); err == nil {
+		fmt.Printf("Recipe %q not found in project.\nFound globally at %s\nUse this one? [y/N] ", nameOrPath, global)
+		var answer string
+		fmt.Scanln(&answer)
+		if strings.HasPrefix(strings.ToLower(answer), "y") {
+			return global, nil
+		}
+		return "", fmt.Errorf("user declined global recipe")
+	}
+
+	return "", fmt.Errorf("recipe %q not found in project or global store", nameOrPath)
+}
+
+// tiny helper used by almost every command already
+func findProjectRoot() (string, error) {
+	dir, err := os.Getwd()
+	if err != nil {
+		return "", err
+	}
+	for {
+		if _, err := os.Stat(filepath.Join(dir, ".git")); err == nil {
+			return dir, nil
+		}
+		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
+			return dir, nil
+		}
+		if _, err := os.Stat(filepath.Join(dir, ".grokkit")); err == nil {
+			return dir, nil
+		}
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			break
+		}
+		dir = parent
+	}
+	return "", fmt.Errorf("not in a project")
+}