refactor(recipe): simplify apply step to dry-run only and add extraction tests

- Restrict filesystem interactions to apply/patch steps exclusively.
- Remove real apply logic with user confirmation; default to creating a patch file in dry-run mode.
- Update prompts, comments, and regex for better clarity and precision.
- Add unit tests for the extractCodeBlocks function to ensure reliable parsing.

internal/recipe/runner.go

@@ -1,7 +1,7 @@
 package recipe
 
 import (
-	"bufio"
+	_ "bufio"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -29,13 +29,13 @@ func (r *Runner) Run() error {
 	for _, step := range r.Recipe.Steps {
 		fmt.Printf("Step %d/%d: %s\n", step.Number, len(r.Recipe.Steps), step.Title)
 
-		// Special case: Apply or patch step is handled by the CLI (like edit/scaffold)
+		// Only special-case the Apply/Patch step (this is the only place the CLI needs to touch disk)
 		if strings.Contains(strings.ToLower(step.Title), "apply") || strings.Contains(strings.ToLower(step.Title), "patch") {
 			r.handleApplyStep(previousResults)
 			continue
 		}
 
-		// Normal LLM step
+		// Everything else is pure LLM — the recipe defines exactly what to do
 		prompt := fmt.Sprintf(`Recipe Overview:
 %s
 
@@ -47,7 +47,7 @@ Objective: %s
 Instructions: %s
 Expected output format: %s
 
-Execute this step now. Respond ONLY with the expected output format — no explanations, no extra text.`,
+Execute this step now.`,
 			r.Recipe.Overview,
 			strings.Join(previousResults, "\n\n---\n\n"),
 			step.Objective,
@@ -55,7 +55,7 @@ Execute this step now. Respond ONLY with the expected output format — no expla
 			step.Expected)
 
 		messages := []map[string]string{
-			{"role": "system", "content": "You are Grok, built by xAI. You are a precise, expert Go programmer and refactoring assistant. Always follow the user's instructions exactly for legitimate coding tasks."},
+			{"role": "system", "content": "You are Grok, built by xAI. You are a precise, expert programmer and refactoring assistant. Always follow the user's instructions exactly for legitimate coding tasks."},
 			{"role": "user", "content": prompt},
 		}
 
@@ -69,14 +69,13 @@ Execute this step now. Respond ONLY with the expected output format — no expla
 	return nil
 }
 
-// handleApplyStep parses the refactored code blocks from the previous step and does the real apply/patch with confirmation
+// handleApplyStep is the ONLY place we touch the filesystem (exactly like edit/scaffold)
 func (r *Runner) handleApplyStep(previousResults []string) {
 	if len(previousResults) == 0 {
 		fmt.Println("   ⚠️  No previous results to apply — skipping.")
 		return
 	}
 
-	// Extract all labelled code blocks from the last LLM step (Step 2)
 	lastResult := previousResults[len(previousResults)-1]
 	blocks := extractCodeBlocks(lastResult)
 
@@ -85,9 +84,7 @@ func (r *Runner) handleApplyStep(previousResults []string) {
 		return
 	}
 
-	// Dry-run or real apply?
+	// Dry-run by default (we'll wire parameters later)
-	dryRun := true // TODO: read from parameters once we add --param support
-	if dryRun {
 	fmt.Println("   📄 Dry-run mode: creating patch file...")
 	patchPath := filepath.Join(".", "recipe-refactor.patch")
 	if err := createUnifiedPatch(blocks, patchPath); err != nil {
@@ -96,34 +93,10 @@ func (r *Runner) handleApplyStep(previousResults []string) {
 	}
 	fmt.Printf("   ✅ Patch created: %s\n", patchPath)
 	fmt.Println("   Review it, then run with dry_run=false to apply.")
-		return
 }
 
-	// Real apply with confirmation (exactly like edit/scaffold)
+// Simple regex for the format the recipe asks Grok to return
-	fmt.Print("\nApply these changes to disk? (y/N) ")
+var regStr = "`(?s)^//\\s*(.+?\\.go)\\n```go\\n(.*?)\\n````"
-	scanner := bufio.NewScanner(os.Stdin)
-	if scanner.Scan() {
-		answer := strings.ToLower(strings.TrimSpace(scanner.Text()))
-		if answer == "y" || answer == "yes" {
-			for filePath, content := range blocks {
-				backup := filePath + ".bak"
-				if err := os.Rename(filePath, backup); err == nil {
-					fmt.Printf("   📦 Backed up: %s\n", backup)
-				}
-				if err := os.WriteFile(filePath, []byte(content), 0644); err != nil {
-					fmt.Printf("   ❌ Failed to write %s: %v\n", filePath, err)
-					continue
-				}
-				fmt.Printf("   ✅ Applied: %s\n", filePath)
-			}
-		} else {
-			fmt.Println("   ❌ Cancelled — no changes made.")
-		}
-	}
-}
-
-// Simple parser for the labelled blocks Grok outputs: "// /path/to/file.go\n```go\ncode\n```"
-var regStr = "`(?s)//\\s*(.+?\\.go)\\n```go\\n(.*?)\\n````"
 var blockRe = regexp.MustCompile(regStr)
 
 func extractCodeBlocks(text string) map[string]string {
@@ -138,7 +111,6 @@ func extractCodeBlocks(text string) map[string]string {
 }
 
 func createUnifiedPatch(blocks map[string]string, patchPath string) error {
-	// Very simple unified patch for now — can be improved later with real diff
 	f, err := os.Create(patchPath)
 	if err != nil {
 		return err

internal/recipe/runner_test.go

@@ -0,0 +1,61 @@
+package recipe
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestExtractCodeBlocks(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name     string
+		input    string
+		expected map[string]string
+	}{
+		{
+			name:  "Single block",
+			input: "// main.go\n```go\npackage main\n\nfunc main() {}\n```",
+			expected: map[string]string{
+				"main.go": "package main\n\nfunc main() {}",
+			},
+		},
+		{
+			name: "Multiple blocks",
+			input: `// internal/utils.go
+` + "```" + `go
+package utils
+func Help() {}
+` + "```" + `
+Some commentary.
+// cmd/root.go
+` + "```" + `go
+package cmd
+func Execute() {}
+` + "```",
+			expected: map[string]string{
+				"internal/utils.go": "package utils\nfunc Help() {}",
+				"cmd/root.go":       "package cmd\nfunc Execute() {}",
+			},
+		},
+		{
+			name:     "No blocks",
+			input:    "Just some text without any blocks.",
+			expected: map[string]string{},
+		},
+		{
+			name:     "Incomplete block",
+			input:    "// oops.go\n```go\nfunc incomplete() {",
+			expected: map[string]string{},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := extractCodeBlocks(tt.input)
+			if !reflect.DeepEqual(got, tt.expected) {
+				t.Errorf("extractCodeBlocks() = %v, want %v", got, tt.expected)
+			}
+		})
+	}
+}