fix: report errors instead of silent catch in subagent-resolver (#1283)

src/tools/delegate-task/subagent-resolver.ts

@@ -6,6 +6,7 @@ import { parseModelString } from "./model-string-parser"
 import { AGENT_MODEL_REQUIREMENTS } from "../../shared/model-requirements"
 import { getAgentDisplayName, getAgentConfigKey } from "../../shared/agent-display-names"
 import { normalizeSDKResponse } from "../../shared"
+import { log } from "../../shared/logger"
 import { getAvailableModelsForDelegateTask } from "./available-models"
 import { resolveModelForDelegateTask } from "./model-selection"
 
@@ -119,8 +120,19 @@ Create the work plan directly - that's your job as the planning agent.`,
     if (!categoryModel && matchedAgent.model) {
       categoryModel = matchedAgent.model
     }
-  } catch {
-    // Proceed anyway - session.prompt will fail with clearer error if agent doesn't exist
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error)
+    log("[delegate-task] Failed to resolve subagent execution", {
+      requestedAgent: agentToUse,
+      parentAgent,
+      error: errorMessage,
+    })
+
+    return {
+      agentToUse: "",
+      categoryModel: undefined,
+      error: `Failed to delegate to agent "${agentToUse}": ${errorMessage}`,
+    }
   }
 
   return { agentToUse, categoryModel }