test(opencode): stabilize Windows CLI subprocesses

packages/opencode/test/cli/help/help-snapshots.test.ts

@@ -13,7 +13,6 @@
 // version (changes per release), so we'd snapshot a moving target.
 import { describe, expect } from "bun:test"
 import { Effect } from "effect"
-import { EOL } from "os"
 import { cliIt } from "../../lib/cli-process"
 import { normalizeForSnapshot, PATH_SEP } from "../../lib/snapshot"
 
@@ -101,7 +100,7 @@ describe("opencode CLI help-text snapshots", () => {
       Effect.gen(function* () {
         const topLevel = yield* opencode.spawn(["--help"], { env: SNAPSHOT_ENV })
         expect(topLevel.exitCode).toBe(0)
-        expect(topLevel.stderr.endsWith(EOL)).toBe(true)
+        expect(topLevel.stderr.endsWith("\n")).toBe(true)
         expect(topLevel.stderr).toContain("--mini")
         expect(topLevel.stderr).not.toContain("--thinking")
         expect(topLevel.stderr).not.toContain("--variant")

packages/opencode/test/lib/cli-process.ts

@@ -517,5 +517,10 @@ export const cliIt = {
     name: string,
     body: (input: CliFixture) => Effect.Effect<A, E, Scope.Scope | HttpClient.HttpClient>,
     opts?: number | TestOptions,
-  ) => test.concurrent(name, () => Effect.runPromise(Effect.scoped(withCliFixture(body))), opts),
+  ) =>
+    (process.platform === "win32" ? test : test.concurrent)(
+      name,
+      () => Effect.runPromise(Effect.scoped(withCliFixture(body))),
+      opts,
+    ),
 }