refactor(recipe): switch refactor step to strict JSON output

- Update result-refactor.md to output JSON array of file changes instead of code blocks
- Modify runner.go to parse JSON directly, removing regex-based extraction
- Add project_languages and extensions to recipe metadata
- Improve error handling and output consistency in steps

.grokkit/recipes/result-refactor.md

@@ -13,6 +13,13 @@ parameters:
     default: true
     description: If true, only generate patches
 
+project_languages:
+  - go
+
+extensions:
+  go:
+    - .go
+
 allowed_shell_commands:
   - go test ./...
   - go fmt ./...
@@ -33,23 +40,30 @@ Refactors all error handling in the target package to use the new Result[T] patt
 ### Step 1: Discover files
 **Objective:** Find every file that needs changing.  
 **Instructions:** Recursively scan `{{.package_path}}` for `.go` files containing `if err != nil`.  
-If no files are found or the path does not exist, output exactly: "No files found matching the criteria." 
+**Expected output:** A clean list of full file paths (one per line). If none, say "No files found matching the criteria."
-**Expected output:** A clean numbered list of full file paths (one per line).
 
 ### Step 2: Refactor each file
 **Objective:** Generate the updated code.  
 **Instructions:** For each file from Step 1:
 - Read the full original content.
-- Refactor it to use `Result[T]` instead of naked errors (follow existing style, preserve comments).
+- Refactor it to use `Result[T]` instead of naked errors (follow existing style, preserve all comments).
-- Return *ONLY* the complete new file inside a ```go code block (no explanations).  
+- Return **ONLY** a single JSON array in this exact format (no extra text, no markdown):
-**Expected output:** One ```go block per file, clearly labelled with the filename.
+```json
+[
+  {
+    "file": "internal/example.go",
+    "content": "the complete refactored file here"
+  }
+]
+```
 
 ### Step 3: Apply or patch
-**Objective:** Safely write changes or create reviewable output.  
+**Objective:** 
+Safely write changes or create reviewable output.
 **Instructions:**
-- If `dry_run` is true → create a unified diff patch file for review.
+- If dry_run is true → create a unified diff patch file for review.
-- If false → write the new files (backup originals as `.bak`).  
+- If false → write the new files (backup originals as .bak).
-  **Expected output:** Confirmation of what was written + full path to any patch file.
+**Expected output:** Confirmation of what was written + full path to any patch file.
 
-### Final Summary
+**Final Summary**
 Give me a concise executive summary: number of files changed, any warnings or patterns you noticed, and your recommended next step.

internal/recipe/runner.go

@@ -2,10 +2,10 @@ package recipe
 
 import (
 	_ "bufio"
+	"encoding/json"
 	"fmt"
 	"os"
 	"path/filepath"
-	"regexp"
 	"strings"
 
 	"gmgauthier.com/grokkit/internal/grok"
@@ -99,7 +99,7 @@ func (r *Runner) discoverFiles() []string {
 	return files
 }
 
-// handleApplyStep with robust regex that matches Grok's current output
+// handleApplyStep parses strict JSON from the refactor step — no regex at all
 func (r *Runner) handleApplyStep(previousResults []string) {
 	if len(previousResults) == 0 {
 		fmt.Println("   ⚠️  No previous results to apply — skipping.")
@@ -107,16 +107,36 @@ func (r *Runner) handleApplyStep(previousResults []string) {
 	}
 
 	lastResult := previousResults[len(previousResults)-1]
-	blocks := extractCodeBlocks(lastResult)
 
-	if len(blocks) == 0 {
+	// Find the JSON array in the response
-		fmt.Println("   ⚠️  No code blocks found to apply — skipping.")
+	start := strings.Index(lastResult, "[")
+	end := strings.LastIndex(lastResult, "]") + 1
+	if start == -1 || end == 0 {
+		fmt.Println("   ⚠️  No JSON found in previous step — skipping.")
+		return
+	}
+
+	jsonStr := lastResult[start:end]
+
+	type FileChange struct {
+		File    string `json:"file"`
+		Content string `json:"content"`
+	}
+
+	var changes []FileChange
+	if err := json.Unmarshal([]byte(jsonStr), &changes); err != nil {
+		fmt.Printf("   ⚠️  Could not parse JSON: %v\n", err)
+		return
+	}
+
+	if len(changes) == 0 {
+		fmt.Println("   ⚠️  No files to apply — skipping.")
 		return
 	}
 
 	fmt.Println("   📄 Dry-run mode: creating patch file...")
 	patchPath := filepath.Join(".", "recipe-refactor.patch")
-	if err := createUnifiedPatch(blocks, patchPath); err != nil {
+	if err := createUnifiedPatch(changes, patchPath); err != nil {
 		fmt.Printf("   ❌ Failed to create patch: %v\n", err)
 		return
 	}
@@ -124,32 +144,18 @@ func (r *Runner) handleApplyStep(previousResults []string) {
 	fmt.Println("   Review it, then run with dry_run=false to apply.")
 }
 
-// Double-quoted regex — no raw-string backtick problems ever again
+func createUnifiedPatch(changes []struct{ File, Content string }, patchPath string) error {
-var blockRe = regexp.MustCompile(`(?s)```go\n// \s*(.+?\.go)\n(.*?)\n````)
-
-func extractCodeBlocks(text string) map[string]string {
-	blocks := make(map[string]string)
-	matches := blockRe.FindAllStringSubmatch(text, -1)
-	for _, m := range matches {
-		if len(m) == 3 {
-			blocks[m[1]] = m[2]
-		}
-	}
-	return blocks
-}
-
-func createUnifiedPatch(blocks map[string]string, patchPath string) error {
 	f, err := os.Create(patchPath)
 	if err != nil {
 		return err
 	}
 	defer f.Close()
 
-	for path, content := range blocks {
+	for _, ch := range changes {
-		fmt.Fprintf(f, "--- %s\n+++ %s\n@@ -0,0 +1,%d @@\n", path, path, strings.Count(content, "\n")+1)
+		fmt.Fprintf(f, "--- %s\n+++ %s\n@@ -0,0 +1,%d @@\n", ch.File, ch.File, strings.Count(ch.Content, "\n")+1)
-		for _, line := range strings.Split(content, "\n") {
+		for _, line := range strings.Split(ch.Content, "\n") {
 			fmt.Fprintf(f, "+%s\n", line)
 		}
 	}
 	return nil
-}
+}