test(agents): share overflow retry compaction fixture

src/agents/pi-embedded-runner/run.overflow-compaction.fixture.ts

@@ -21,3 +21,46 @@ export function makeAttemptResult(
     ...overrides,
   };
 }
+
+type MockRunEmbeddedAttempt = {
+  mockResolvedValueOnce: (value: EmbeddedRunAttemptResult) => unknown;
+};
+
+type MockCompactDirect = {
+  mockResolvedValueOnce: (value: {
+    ok: true;
+    compacted: true;
+    result: {
+      summary: string;
+      firstKeptEntryId: string;
+      tokensBefore: number;
+    };
+  }) => unknown;
+};
+
+export function mockOverflowRetrySuccess(params: {
+  runEmbeddedAttempt: MockRunEmbeddedAttempt;
+  compactDirect: MockCompactDirect;
+  overflowMessage?: string;
+}) {
+  const overflowError = new Error(
+    params.overflowMessage ?? "request_too_large: Request size exceeds model context window",
+  );
+
+  params.runEmbeddedAttempt.mockResolvedValueOnce(
+    makeAttemptResult({ promptError: overflowError }),
+  );
+  params.runEmbeddedAttempt.mockResolvedValueOnce(makeAttemptResult({ promptError: null }));
+
+  params.compactDirect.mockResolvedValueOnce({
+    ok: true,
+    compacted: true,
+    result: {
+      summary: "Compacted session",
+      firstKeptEntryId: "entry-5",
+      tokensBefore: 150000,
+    },
+  });
+
+  return overflowError;
+}