feat: Add API change coordination (chu refactor api)

Coordinate updates across API routes, handlers and tests
- Detect HTTP routes in handlers/controllers
- Parse method (GET/POST/etc), path, handler name
- Generate missing handler functions
- Create/update corresponding tests
- Ensures consistency across API layer

Autonomy: 75% (48/64 scenarios) 🎉
Complex Code Modifications: 2/12

Author: jadercorrea

cmd/chu/main.go

@@ -81,6 +81,9 @@ $0-5/month vs $20-30/month subscriptions.
   chu profile list         - List all profiles
   chu profile use <backend>.<profile> - Switch profile
 
+## REFACTORING
+  chu refactor api         - Coordinate API changes (routes, handlers, tests)
+
 ## ADVANCED
   chu config get/set       - Direct config manipulation (advanced)
   chu ml list|train|test|eval|predict - Machine learning features

docs/reference/capabilities.md

@@ -132,35 +132,39 @@ Chuchu identifies:
 
 ## What Chuchu Cannot Do (Yet)
 
-### 🟡 Complex Code Modifications (1/12 scenarios)
+### 🟡 Complex Code Modifications (2/12 scenarios)
 
 **Implemented:**
 
 - ✅ Database migrations (`chu gen migration <name>`)
+- ✅ API changes coordination (`chu refactor api`)
 
 **Not yet implemented:**
 
 - **Multi-file refactoring** - Changing function signatures across 5+ files
-- **API changes** - Coordinated updates to routes, handlers, tests
 - **Breaking changes** - Updating all consumers of changed APIs
 - **Type system changes** - Complex type definition updates
 - **Performance optimizations** - Profiling and bottleneck identification
 - **Security fixes** - Complex vulnerability patches
 - **Configuration changes** - Environment-specific configurations
 - **Backward compatibility** - Maintaining old APIs while adding new
 
-**Example:**
+**Examples:**
 ```bash
 chu gen migration "add user email"
 # Detects model changes
 # Generates SQL with up/down migrations
+
+chu refactor api
+# Scans routes in handlers/controllers
+# Generates/updates handler functions
+# Creates/updates corresponding tests
 ```
 
 **Limitations:**
-- Currently detects changes in Git working tree
-- Go structs only (models with gorm/db tags)
-- SQL output (PostgreSQL compatible)
-- Manual review recommended before applying
+- Migration: Git working tree only, Go structs with tags, PostgreSQL SQL
+- API coordination: Go HTTP handlers, standard patterns (Get/Post/etc)
+- Manual review recommended for both
 
 **Why others not implemented:** These require deep architectural understanding and multi-step coordination. Coming in future releases.
 
@@ -252,10 +256,10 @@ chu docs update --apply     # Apply updates automatically
 
 ### Next Release (Targeting 80% Autonomy)
 
-**Phase 7: Complex Code Modifications (11 remaining scenarios)**
+**Phase 7: Complex Code Modifications (10 remaining scenarios)**
 - ✅ Database migrations (DONE)
+- ✅ API changes with coordinated updates (DONE)
 - Multi-file refactoring
-- API changes with coordinated updates
 - Type system improvements
 
 **Phase 8: Test Generation (1 remaining scenario)**
@@ -304,7 +308,8 @@ Skipped tests (t.Skip()) represent features not yet implemented.
 - ✅ CHANGELOG generation
 - ✅ README updates
 - ✅ Database migrations
-- **Autonomy:** 47/64 (73%)
+- ✅ API change coordination
+- **Autonomy:** 48/64 (75%)
 - **MVAA Critical Path:** 17/17 (100%)
 
 ### Future Releases

internal/migration/generator.go

@@ -63,7 +63,7 @@ func (g *MigrationGenerator) GenerateMigration(ctx context.Context, name string)
 
 	timestamp := time.Now().Format("20060102150405")
 	filename := fmt.Sprintf("%s_%s.sql", timestamp, strings.ReplaceAll(name, " ", "_"))
-	
+
 	migrationsDir := filepath.Join(g.workDir, "migrations")
 	if err := os.MkdirAll(migrationsDir, 0755); err != nil {
 		return nil, fmt.Errorf("failed to create migrations directory: %w", err)
@@ -93,14 +93,14 @@ func (g *MigrationGenerator) detectModelChanges() ([]ModelChange, error) {
 
 	var changes []ModelChange
 	files := strings.Split(strings.TrimSpace(string(output)), "\n")
-	
+
 	for _, file := range files {
 		if !strings.HasSuffix(file, ".go") {
 			continue
 		}
 
-		if strings.Contains(file, "model") || strings.Contains(file, "entity") || 
-		   strings.Contains(file, "schema") {
+		if strings.Contains(file, "model") || strings.Contains(file, "entity") ||
+			strings.Contains(file, "schema") {
 			fileChanges, err := g.analyzeFileChanges(filepath.Join(g.workDir, file))
 			if err == nil {
 				changes = append(changes, fileChanges...)
@@ -217,8 +217,8 @@ func (g *MigrationGenerator) parseModels(content string) map[string]map[string]s
 
 			if field.Tag != nil {
 				tag := field.Tag.Value
-				if strings.Contains(tag, "gorm:") || strings.Contains(tag, "db:") || 
-				   strings.Contains(tag, "json:") {
+				if strings.Contains(tag, "gorm:") || strings.Contains(tag, "db:") ||
+					strings.Contains(tag, "json:") {
 					fields[fieldName] = fieldType
 				}
 			} else if !ast.IsExported(fieldName) {
@@ -259,21 +259,21 @@ func (g *MigrationGenerator) generateMigrationCode(ctx context.Context, name str
 		switch change.Type {
 		case "added":
 			if change.Field == "" {
-				changeDescriptions = append(changeDescriptions, 
+				changeDescriptions = append(changeDescriptions,
 					fmt.Sprintf("- Added model: %s", change.ModelName))
 			} else {
-				changeDescriptions = append(changeDescriptions, 
+				changeDescriptions = append(changeDescriptions,
 					fmt.Sprintf("- Added field %s.%s (%s)", change.ModelName, change.Field, change.NewType))
 			}
 		case "modified":
-			changeDescriptions = append(changeDescriptions, 
+			changeDescriptions = append(changeDescriptions,
 				fmt.Sprintf("- Modified %s.%s: %s -> %s", change.ModelName, change.Field, change.OldType, change.NewType))
 		case "removed":
 			if change.Field == "" {
-				changeDescriptions = append(changeDescriptions, 
+				changeDescriptions = append(changeDescriptions,
 					fmt.Sprintf("- Removed model: %s", change.ModelName))
 			} else {
-				changeDescriptions = append(changeDescriptions, 
+				changeDescriptions = append(changeDescriptions,
 					fmt.Sprintf("- Removed field %s.%s", change.ModelName, change.Field))
 			}
 		}
@@ -306,7 +306,7 @@ Return ONLY the SQL migration code, no explanations.`, name, strings.Join(change
 	}
 
 	code := strings.TrimSpace(resp.Text)
-	
+
 	if strings.HasPrefix(code, "```sql") {
 		code = strings.TrimPrefix(code, "```sql\n")
 		code = strings.TrimSuffix(code, "```")