From 5852e79ec6851289505c306449ba61b9520ee7c9 Mon Sep 17 00:00:00 2001
From: Aiden Cline <aidenpcline@gmail.com>
Date: Tue, 26 May 2026 11:23:49 -0500
Subject: [PATCH] fix(opencode): suppress vertex metadata lookup warning

---
 packages/opencode/src/server/server.ts      |  1 +
 packages/opencode/src/session/prompt.ts     |  1 +
 packages/opencode/src/util/warning.ts       | 10 ++++++++++
 packages/opencode/test/util/warning.test.ts | 13 +++++++++++++
 4 files changed, 25 insertions(+)
 create mode 100644 packages/opencode/src/util/warning.ts
 create mode 100644 packages/opencode/test/util/warning.test.ts

diff --git a/packages/opencode/src/server/server.ts b/packages/opencode/src/server/server.ts
index 9a448b78d6..5414f54508 100644
--- a/packages/opencode/src/server/server.ts
+++ b/packages/opencode/src/server/server.ts
@@ -1,4 +1,5 @@
 import "./init-projectors"
+import "@/util/warning"
 
 import { NodeHttpServer } from "@effect/platform-node"
 import * as Log from "@opencode-ai/core/util/log"
diff --git a/packages/opencode/src/session/prompt.ts b/packages/opencode/src/session/prompt.ts
index 22fe4d81cd..2c039225ae 100644
--- a/packages/opencode/src/session/prompt.ts
+++ b/packages/opencode/src/session/prompt.ts
@@ -1,5 +1,6 @@
 import path from "path"
 import os from "os"
+import "@/util/warning"
 import { SessionID, MessageID, PartID } from "./schema"
 import { MessageV2 } from "./message-v2"
 import * as Log from "@opencode-ai/core/util/log"
diff --git a/packages/opencode/src/util/warning.ts b/packages/opencode/src/util/warning.ts
new file mode 100644
index 0000000000..2acbdcb8d3
--- /dev/null
+++ b/packages/opencode/src/util/warning.ts
@@ -0,0 +1,10 @@
+const emitWarning = process.emitWarning.bind(process)
+
+// Google ADC checks the metadata service during local Vertex authentication.
+// That expected miss should not write directly over the interactive UI.
+process.emitWarning = ((...args: Parameters<typeof process.emitWarning>) => {
+  const type = typeof args[1] === "string" ? args[1] : args[1]?.type
+  const name = type ?? (args[0] instanceof Error ? args[0].name : undefined)
+  if (name === "MetadataLookupWarning") return
+  emitWarning(...args)
+}) as typeof process.emitWarning
diff --git a/packages/opencode/test/util/warning.test.ts b/packages/opencode/test/util/warning.test.ts
new file mode 100644
index 0000000000..88f258dfac
--- /dev/null
+++ b/packages/opencode/test/util/warning.test.ts
@@ -0,0 +1,13 @@
+import { expect, test } from "bun:test"
+import { Process } from "@/util/process"
+
+test("suppresses metadata lookup warnings without hiding other warnings", async () => {
+  const out = await Process.run([
+    process.execPath,
+    "-e",
+    'await import("./src/util/warning.ts"); process.emitWarning("metadata", "MetadataLookupWarning"); process.emitWarning("visible", "VisibleWarning")',
+  ])
+
+  expect(out.stderr.toString()).not.toContain("MetadataLookupWarning")
+  expect(out.stderr.toString()).toContain("VisibleWarning: visible")
+})