update working comment on error

utils/errorReport.ts

@@ -0,0 +1,45 @@
+import { log } from "./cli.ts";
+import { reportProgress } from "../mcp/comment.ts";
+import { getMcpContext } from "../mcp/shared.ts";
+
+/**
+ * Check if MCP context is initialized (i.e., MCP server has started)
+ */
+function isMcpContextInitialized(): boolean {
+  try {
+    getMcpContext();
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Report an error to the GitHub working comment.
+ * Formats the error message for GitHub markdown and updates the progress comment.
+ * Handles failures gracefully - logs but doesn't throw.
+ */
+export async function reportErrorToComment({
+  error,
+  title,
+}: {
+  error: string;
+  title?: string;
+}): Promise<void> {
+  // only report if MCP context is initialized (MCP server has started)
+  if (!isMcpContextInitialized()) {
+    log.debug("skipping error comment update: MCP context not initialized");
+    return;
+  }
+
+  try {
+    const formattedError = title ? `${title}\n\n${error}` : `❌ ${error}`;
+    await reportProgress({ body: formattedError });
+  } catch (reportError) {
+    // log but don't throw - we don't want error reporting to fail the workflow
+    const errorMessage =
+      reportError instanceof Error ? reportError.message : String(reportError);
+    log.warning(`failed to report error to comment: ${errorMessage}`);
+  }
+}
+