feat(pi-workflow): add human-readable run labels

extensions/pi-workflow/tool.ts

@@ -11,6 +11,7 @@ import {
   type ContextTransitionRuntime,
 } from "./context-transition.ts";
 import type { WorkflowCommand, WorkflowView } from "./engine.ts";
+import { deriveRunLabel } from "./run-label.ts";
 
 const ACTIONS = ["start", "inspect", "decide", "abort"] as const;
 const WORKFLOW_MODES = ["feature", "feature-script", "analysis-script"] as const;
@@ -370,9 +371,9 @@ function boundToolOutput(contents: string) {
   return `${characters.join("")}${marker}`;
 }
 
-function resultText(details: WorkflowToolDetails) {
+function resultText(details: WorkflowToolDetails, label: string) {
   const lines = [
-    `Workflow ${details.runId}: ${details.status} at revision ${details.revision}.`,
+    `Workflow ${label}: ${details.status} at revision ${details.revision}.`,
   ];
   if (details.openGate) {
     lines.push(
@@ -479,6 +480,14 @@ export function registerPiWorkflowTool(
           await cancellationWork;
           throw cancellationError();
         }
+      } catch (error) {
+        if (params.action === "inspect" && params.runId) {
+          const reason = error instanceof Error ? error.message : String(error);
+          throw new Error(
+            `Workflow Run ${params.runId} could not be loaded: ${reason}`,
+          );
+        }
+        throw error;
       } finally {
         executionSignal.removeEventListener("abort", onAbort);
       }
@@ -488,7 +497,9 @@ export function registerPiWorkflowTool(
         ctx.sessionManager.getSessionId(),
       );
       return {
-        content: [{ type: "text" as const, text: resultText(details) }],
+        content: [
+          { type: "text" as const, text: resultText(details, deriveRunLabel(view)) },
+        ],
         details,
       };
     },