refactor: replace Bun.sleep with node timers (#15013)

packages/opencode/test/preload.ts

@@ -3,6 +3,7 @@
 import os from "os"
 import path from "path"
 import fs from "fs/promises"
+import { setTimeout as sleep } from "node:timers/promises"
 import { afterAll } from "bun:test"
 
 // Set XDG env vars FIRST, before any src/ imports
@@ -15,7 +16,7 @@ afterAll(async () => {
     typeof error === "object" && error !== null && "code" in error && error.code === "EBUSY"
   const rm = async (left: number): Promise<void> => {
     Bun.gc(true)
-    await Bun.sleep(100)
+    await sleep(100)
     return fs.rm(dir, { recursive: true, force: true }).catch((error) => {
       if (!busy(error)) throw error
       if (left <= 1) throw error

packages/opencode/test/pty/pty-output-isolation.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, test } from "bun:test"
 import { Instance } from "../../src/project/instance"
 import { Pty } from "../../src/pty"
 import { tmpdir } from "../fixture/fixture"
+import { setTimeout as sleep } from "node:timers/promises"
 
 describe("pty", () => {
   test("does not leak output when websocket objects are reused", async () => {
@@ -43,7 +44,7 @@ describe("pty", () => {
 
           // Output from a must never show up in b.
           Pty.write(a.id, "AAA\n")
-          await Bun.sleep(100)
+          await sleep(100)
 
           expect(outB.join("")).not.toContain("AAA")
         } finally {
@@ -88,7 +89,7 @@ describe("pty", () => {
           }
 
           Pty.write(a.id, "AAA\n")
-          await Bun.sleep(100)
+          await sleep(100)
 
           expect(outB.join("")).not.toContain("AAA")
         } finally {
@@ -128,7 +129,7 @@ describe("pty", () => {
           ctx.connId = 2
 
           Pty.write(a.id, "AAA\n")
-          await Bun.sleep(100)
+          await sleep(100)
 
           expect(out.join("")).toContain("AAA")
         } finally {

packages/opencode/test/session/retry.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "bun:test"
 import type { NamedError } from "@opencode-ai/util/error"
 import { APICallError } from "ai"
+import { setTimeout as sleep } from "node:timers/promises"
 import { SessionRetry } from "../../src/session/retry"
 import { MessageV2 } from "../../src/session/message-v2"
 
@@ -135,7 +136,7 @@ describe("session.message-v2.fromError", () => {
             new ReadableStream({
               async pull(controller) {
                 controller.enqueue("Hello,")
-                await Bun.sleep(10000)
+                await sleep(10000)
                 controller.enqueue(" World!")
                 controller.close()
               },