feat: implement tdd workflow (#1309)

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.taskmaster/config.json

@@ -1,8 +1,8 @@
 {
 	"models": {
 		"main": {
-			"provider": "anthropic",
-			"modelId": "claude-sonnet-4-20250514",
+			"provider": "claude-code",
+			"modelId": "sonnet",
 			"maxTokens": 64000,
 			"temperature": 0.2
 		},
@@ -35,6 +35,7 @@
 		"defaultTag": "master"
 	},
 	"claudeCode": {},
+	"codexCli": {},
 	"grokCli": {
 		"timeout": 120000,
 		"workingDirectory": null,