fix: wizard "No JSON found" — Claude CLI stream-json returns empty result field

Claude CLI's --output-format stream-json now returns "result": "" in the result
message. The actual response text lives in assistant message text blocks, which
_textOutput correctly accumulates. runPrompt() was returning the empty
resultMsg.result without falling back to _textOutput.value.

Also improved plan-orchestrator JSON extraction to try code-block-wrapped JSON
first (```json {...} ```) before the greedy regex, plus debug logging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Ark0N

src/plan-orchestrator.ts

@@ -414,9 +414,24 @@ export class PlanOrchestrator {
 
       const durationMs = Date.now() - startTime;
 
-      // Extract JSON from response
-      const jsonMatch = response.match(/\{[\s\S]*\}/);
+      console.log(
+        `[PlanOrchestrator] Research response length: ${response.length}, first 500 chars:`,
+        response.substring(0, 500)
+      );
+
+      // Extract JSON from response — try multiple strategies
+      let jsonMatch = response.match(/```(?:json)?\s*(\{[\s\S]*?\})\s*```/);
+      if (jsonMatch) {
+        jsonMatch = [jsonMatch[1]]; // Use captured group (inside code block)
+      } else {
+        jsonMatch = response.match(/\{[\s\S]*\}/);
+      }
+
       if (!jsonMatch) {
+        console.error(
+          `[PlanOrchestrator] No JSON found in research response. Full response:`,
+          response.substring(0, 2000)
+        );
         onSubagent?.({
           type: 'failed',
           agentId,
@@ -587,9 +602,24 @@ export class PlanOrchestrator {
 
       const durationMs = Date.now() - startTime;
 
-      // Extract JSON from response
-      const jsonMatch = response.match(/\{[\s\S]*\}/);
+      console.log(
+        `[PlanOrchestrator] Planner response length: ${response.length}, first 500 chars:`,
+        response.substring(0, 500)
+      );
+
+      // Extract JSON from response — try multiple strategies
+      let jsonMatch = response.match(/```(?:json)?\s*(\{[\s\S]*?\})\s*```/);
+      if (jsonMatch) {
+        jsonMatch = [jsonMatch[1]]; // Use captured group (inside code block)
+      } else {
+        jsonMatch = response.match(/\{[\s\S]*\}/);
+      }
+
       if (!jsonMatch) {
+        console.error(
+          `[PlanOrchestrator] No JSON found in planner response. Full response:`,
+          response.substring(0, 2000)
+        );
         onSubagent?.({
           type: 'failed',
           agentId,

src/session.ts

@@ -1516,9 +1516,11 @@ export class Session extends EventEmitter {
             this._status = 'idle';
             const cost = resultMsg.total_cost_usd || 0;
             this._totalCost += cost;
-            this.emit('completion', resultMsg.result || '', cost);
+            // Claude CLI stream-json may return empty result field — fall back to accumulated text output
+            const result = resultMsg.result || this._textOutput.value || '';
+            this.emit('completion', result, cost);
             if (resolve) {
-              resolve({ result: resultMsg.result || '', cost });
+              resolve({ result, cost });
             }
           } else if (exitCode !== 0 || (resultMsg && resultMsg.is_error)) {
             this._status = 'error';