Update contributing, deduplicate more functions

src/agents/pi-embedded-runner/abort.ts

@@ -1 +1,17 @@
-export { isAbortError } from "../../infra/unhandled-rejections.js";
+/**
+ * Runner abort check. Catches any abort-related message for embedded runners.
+ * More permissive than the core isAbortError since runners need to catch
+ * various abort signals from different sources.
+ */
+export function isRunnerAbortError(err: unknown): boolean {
+  if (!err || typeof err !== "object") {
+    return false;
+  }
+  const name = "name" in err ? String(err.name) : "";
+  if (name === "AbortError") {
+    return true;
+  }
+  const message =
+    "message" in err && typeof err.message === "string" ? err.message.toLowerCase() : "";
+  return message.includes("aborted");
+}

src/agents/pi-embedded-runner/run/attempt.ts

@@ -60,7 +60,7 @@ import { buildSystemPromptParams } from "../../system-prompt-params.js";
 import { buildSystemPromptReport } from "../../system-prompt-report.js";
 import { resolveTranscriptPolicy } from "../../transcript-policy.js";
 import { DEFAULT_BOOTSTRAP_FILENAME } from "../../workspace.js";
-import { isAbortError } from "../abort.js";
+import { isRunnerAbortError } from "../abort.js";
 import { appendCacheTtlTimestamp, isCacheTtlEligibleProvider } from "../cache-ttl.js";
 import { buildEmbeddedExtensionPaths } from "../extensions.js";
 import { applyExtraParamsToAgent } from "../extra-params.js";
@@ -832,7 +832,7 @@ export async function runEmbeddedAttempt(
         try {
           await waitForCompactionRetry();
         } catch (err) {
-          if (isAbortError(err)) {
+          if (isRunnerAbortError(err)) {
             if (!promptError) {
               promptError = err;
             }