diff --git a/packages/core/src/util/machine.ts b/packages/core/src/util/machine.ts
deleted file mode 100644
index 8a5ed6b4f5d4..000000000000
--- a/packages/core/src/util/machine.ts
+++ /dev/null
@@ -1,51 +0,0 @@
-import { execFile } from "child_process"
-import { Hash } from "@opencode/util/hash"
-
-// Stable per-machine identifier sent with MarsAI auth calls so the server can bind one
-// account to one machine and detect multi-account abuse. Never sent anywhere else.
-
-let cached: string | undefined
-
-function raw(): Promise<string> {
-  return new Promise((resolve) => {
-    if (process.platform === "win32") {
-      execFile(
-        "reg",
-        ["query", "HKLM\\SOFTWARE\\Microsoft\\Cryptography", "/v", "MachineGuid"],
-        { timeout: 5_000 },
-        (error, stdout) => {
-          if (error) return resolve("")
-          resolve(stdout.split("REG_SZ")[1]?.trim() ?? "")
-        },
-      )
-      return
-    }
-    const { readFile } = require("fs") as typeof import("fs")
-    const paths =
-      process.platform === "darwin"
-        ? ["/Library/Preferences/SystemConfiguration/com.apple.platform.uuid"]
-        : ["/etc/machine-id", "/var/lib/dbus/machine-id"]
-    const next = (index: number): void => {
-      if (index >= paths.length) return resolve("")
-      readFile(paths[index], "utf8", (error, data) => {
-        if (error) return next(index + 1)
-        resolve(data.trim())
-      })
-    }
-    next(0)
-  })
-}
-
-/** Anonymous, stable machine fingerprint. Falls back to hostname+user when no platform ID exists. */
-export async function machineID(): Promise<string> {
-  if (cached) return cached
-  let id = await raw()
-  if (!id) {
-    const os = await import("os")
-    id = `${os.hostname()}:${os.userInfo().username}`
-  }
-  cached = `m1_${Hash.sha256(id).slice(0, 32)}`
-  return cached
-}
-
-export * as Machine from "./machine.js"