fix: 只用最终 agentMessage 生成 reply

src/selftest/cases/30-codex-stdio.ts

@@ -58,6 +58,16 @@ const selfTest: SelfTestCase = async (context) => {
     const explicitModelResult = await runOnce({ managerUrl: server.baseUrl, runId: explicitModel.runId, commandId: explicitCommand.id, codexCommand: context.fakeCodexCommand, codexArgs: context.fakeCodexArgs, codexHome: context.codexHome, env: { CODEX_HOME: context.codexHome, AGENTRUN_FAKE_CODEX_MODE: "require-explicit-model" }, oneShot: true });
     assert.equal(explicitModelResult.terminalStatus, "completed", "explicit command payload model should still be forwarded");
 
+    const finalMessage = await createRunWithCommand(client, context, "hello final message", "selftest-final-agent-message", 15_000);
+    const finalMessageResult = await runOnce({ managerUrl: server.baseUrl, runId: finalMessage.runId, codexCommand: context.fakeCodexCommand, codexArgs: context.fakeCodexArgs, codexHome: context.codexHome, env: { CODEX_HOME: context.codexHome, AGENTRUN_FAKE_CODEX_MODE: "multi-agent-message-final" }, oneShot: true });
+    assert.equal(finalMessageResult.terminalStatus, "completed", "multi agentMessage run should complete");
+    const finalMessageEnvelope = await client.get(`/api/v1/runs/${finalMessage.runId}/commands/${finalMessage.commandId}/result`) as JsonRecord;
+    assert.equal(finalMessageEnvelope.reply, "Final answer only.", "result reply should use the final completed agentMessage instead of concatenating progress deltas");
+    const finalMessageEvents = await client.get(`/api/v1/runs/${finalMessage.runId}/events?afterSeq=0&limit=100`) as { items?: Array<{ type: string; payload: unknown }> };
+    const assistantEvents = finalMessageEvents.items?.filter((event) => event.type === "assistant_message") ?? [];
+    assert.equal(assistantEvents.length, 1, "backend should emit one final assistant_message event");
+    assert.equal(eventPayload(assistantEvents[0] ?? { payload: {} }).text, "Final answer only.");
+
     await runFailureCase({ client, managerUrl: server.baseUrl, context, mode: "missing-turn-result", expectedStatus: "failed", expectedFailureKind: "backend-response-invalid" });
     await runFailureCase({ client, managerUrl: server.baseUrl, context, mode: "provider-401-rpc-error", expectedStatus: "failed", expectedFailureKind: "provider-auth-failed" });
     await runFailureCase({ client, managerUrl: server.baseUrl, context, mode: "provider-429-terminal", expectedStatus: "failed", expectedFailureKind: "provider-rate-limited" });
@@ -69,7 +79,7 @@ const selfTest: SelfTestCase = async (context) => {
     await runSecretFailureCase({ client, managerUrl: server.baseUrl, context });
     await runSpawnFailureCase({ client, managerUrl: server.baseUrl, context });
 
-    return { name: "codex-stdio", tests: ["runner-lease-heartbeat", "codex-stdio-fake-turn", "codex-stdio-projected-writable-home", "codex-stdio-deepseek-profile-fake-turn", "codex-stdio-deepseek-missing-secret-no-fallback", "codex-stdio-config-model-authoritative", "codex-stdio-explicit-model-forwarded", "codex-stdio-missing-turn-result", "codex-stdio-provider-auth-failed", "codex-stdio-provider-rate-limited", "codex-stdio-provider-503-rpc-error", "codex-stdio-provider-503-terminal", "codex-stdio-provider-503-retry-event", "codex-stdio-invalid-json", "codex-stdio-timeout", "codex-stdio-secret-unavailable", "codex-stdio-spawn-failure"] };
+    return { name: "codex-stdio", tests: ["runner-lease-heartbeat", "codex-stdio-fake-turn", "codex-stdio-projected-writable-home", "codex-stdio-deepseek-profile-fake-turn", "codex-stdio-deepseek-missing-secret-no-fallback", "codex-stdio-config-model-authoritative", "codex-stdio-explicit-model-forwarded", "codex-stdio-final-agent-message-only", "codex-stdio-missing-turn-result", "codex-stdio-provider-auth-failed", "codex-stdio-provider-rate-limited", "codex-stdio-provider-503-rpc-error", "codex-stdio-provider-503-terminal", "codex-stdio-provider-503-retry-event", "codex-stdio-invalid-json", "codex-stdio-timeout", "codex-stdio-secret-unavailable", "codex-stdio-spawn-failure"] };
   } finally {
     await new Promise<void>((resolve) => server.server.close(() => resolve()));
   }

src/selftest/fake-codex-app-server.ts

@@ -116,6 +116,18 @@ for await (const line of rl) {
       respond(message.id, { turn });
       continue;
     }
+    if (mode === "multi-agent-message-final") {
+      turnCounter += 1;
+      const turn = { id: `turn_selftest_${turnCounter}`, status: "completed" };
+      notify("turn/started", { turn });
+      notify("item/agentMessage/delta", { itemId: "msg_progress", delta: "I am checking the workspace. " });
+      notify("item/completed", { item: { id: "msg_progress", type: "agentMessage", text: "I am checking the workspace." } });
+      notify("item/agentMessage/delta", { itemId: "msg_final", delta: "Final answer only." });
+      notify("item/completed", { item: { id: "msg_final", type: "agentMessage", text: "Final answer only." } });
+      notify("turn/completed", { turn });
+      respond(message.id, { turn });
+      continue;
+    }
     turnCounter += 1;
     const turn = { id: `turn_selftest_${turnCounter}`, status: "completed" };
     notify("turn/started", { turn });