test: add byteplus coding-plan live test

docs/help/testing.md

@@ -320,6 +320,12 @@ If you want to rely on env keys (e.g. exported in your `~/.profile`), run local
 - Test: `src/media-understanding/providers/deepgram/audio.live.test.ts`
 - Enable: `DEEPGRAM_API_KEY=... DEEPGRAM_LIVE_TEST=1 pnpm test:live src/media-understanding/providers/deepgram/audio.live.test.ts`
 
+## BytePlus coding plan live
+
+- Test: `src/agents/byteplus.live.test.ts`
+- Enable: `BYTEPLUS_API_KEY=... BYTEPLUS_LIVE_TEST=1 pnpm test:live src/agents/byteplus.live.test.ts`
+- Optional model override: `BYTEPLUS_CODING_MODEL=ark-code-latest`
+
 ## Docker runners (optional “works in Linux” checks)
 
 These run `pnpm test:live` inside the repo Docker image, mounting your local config dir and workspace (and sourcing `~/.profile` if mounted):

src/agents/byteplus.live.test.ts

@@ -0,0 +1,47 @@
+import { completeSimple, type Model } from "@mariozechner/pi-ai";
+import { describe, expect, it } from "vitest";
+import { isTruthyEnvValue } from "../infra/env.js";
+import { BYTEPLUS_CODING_BASE_URL, BYTEPLUS_DEFAULT_COST } from "./byteplus-models.js";
+
+const BYTEPLUS_KEY = process.env.BYTEPLUS_API_KEY ?? "";
+const BYTEPLUS_CODING_MODEL = process.env.BYTEPLUS_CODING_MODEL?.trim() || "ark-code-latest";
+const LIVE = isTruthyEnvValue(process.env.BYTEPLUS_LIVE_TEST) || isTruthyEnvValue(process.env.LIVE);
+
+const describeLive = LIVE && BYTEPLUS_KEY ? describe : describe.skip;
+
+describeLive("byteplus coding plan live", () => {
+  it("returns assistant text", async () => {
+    const model: Model<"openai-completions"> = {
+      id: BYTEPLUS_CODING_MODEL,
+      name: `BytePlus Coding ${BYTEPLUS_CODING_MODEL}`,
+      api: "openai-completions",
+      provider: "byteplus-plan",
+      baseUrl: BYTEPLUS_CODING_BASE_URL,
+      reasoning: false,
+      input: ["text"],
+      cost: BYTEPLUS_DEFAULT_COST,
+      contextWindow: 256000,
+      maxTokens: 4096,
+    };
+
+    const res = await completeSimple(
+      model,
+      {
+        messages: [
+          {
+            role: "user",
+            content: "Reply with the word ok.",
+            timestamp: Date.now(),
+          },
+        ],
+      },
+      { apiKey: BYTEPLUS_KEY, maxTokens: 64 },
+    );
+
+    const text = res.content
+      .filter((block) => block.type === "text")
+      .map((block) => block.text.trim())
+      .join(" ");
+    expect(text.length).toBeGreaterThan(0);
+  }, 30000);
+});