From 90f39bf672fa3de52f127f8dcf81f33ccb8c57fd Mon Sep 17 00:00:00 2001
From: Dax Raad <d@ironbay.co>
Date: Sat, 31 Jan 2026 00:37:19 -0500
Subject: [PATCH] core: prevent parallel test runs from contaminating
 environment variables

---
 packages/opencode/src/env/index.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/opencode/src/env/index.ts b/packages/opencode/src/env/index.ts
index 8c40c08edd..003b59fc71 100644
--- a/packages/opencode/src/env/index.ts
+++ b/packages/opencode/src/env/index.ts
@@ -2,7 +2,9 @@ import { Instance } from "../project/instance"
 
 export namespace Env {
   const state = Instance.state(() => {
-    return process.env as Record<string, string | undefined>
+    // Create a shallow copy to isolate environment per instance
+    // Prevents parallel tests from interfering with each other's env vars
+    return { ...process.env } as Record<string, string | undefined>
   })
 
   export function get(key: string) {