fix(cli): support headless console login

packages/opencode/src/cli/cmd/account.ts

@@ -7,7 +7,13 @@ import { effectCmd } from "../effect-cmd"
 import * as Prompt from "../effect/prompt"
 import open from "open"
 
-const openBrowser = (url: string) => Effect.promise(() => open(url).catch(() => undefined))
+export const hasBrowserOpener = (platform: NodeJS.Platform, xdgOpen: string | null) =>
+  platform !== "linux" || xdgOpen !== null
+
+const openBrowser = (url: string) => {
+  if (!hasBrowserOpener(process.platform, Bun.which("xdg-open"))) return Effect.void
+  return Effect.promise(() => open(url).catch(() => undefined))
+}
 
 const println = (msg: string) => Effect.sync(() => UI.println(msg))
 

packages/opencode/test/cli/account.test.ts

@@ -1,13 +1,19 @@
 import { describe, expect, test } from "bun:test"
 import stripAnsi from "strip-ansi"
 
-import { defaultConsoleUrl, formatAccountLabel, formatOrgLine } from "../../src/cli/cmd/account"
+import { defaultConsoleUrl, formatAccountLabel, formatOrgLine, hasBrowserOpener } from "../../src/cli/cmd/account"
 
 describe("console account display", () => {
   test("uses console.opencode.ai as the default login URL", () => {
     expect(defaultConsoleUrl).toBe("https://console.opencode.ai")
   })
 
+  test("skips automatic browser launch on Linux when xdg-open is unavailable", () => {
+    expect(hasBrowserOpener("linux", null)).toBe(false)
+    expect(hasBrowserOpener("linux", "/usr/bin/xdg-open")).toBe(true)
+    expect(hasBrowserOpener("darwin", null)).toBe(true)
+  })
+
   test("includes the account url in account labels", () => {
     expect(stripAnsi(formatAccountLabel({ email: "one@example.com", url: "https://one.example.com" }, false))).toBe(
       "one@example.com https://one.example.com",