diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b1905c6be..26781ede1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -84,6 +84,10 @@ jobs:
           OPENCODE_CHANNEL: latest
           GH_REPO: ${{ github.repository }}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # Embedded into the binary by build.ts via Bun `define`. Read at
+          # runtime in @browser-use/bcode-browser/telemetry, gated by
+          # DO_NOT_TRACK and any user-supplied LMNR_PROJECT_API_KEY.
+          BCODE_DEFAULT_LMNR_KEY: ${{ secrets.LMNR_PROJECT_API_KEY_OSS }}
         run: |
           ./packages/opencode/script/build.ts
 
diff --git a/packages/bcode-browser/src/telemetry.ts b/packages/bcode-browser/src/telemetry.ts
new file mode 100644
index 000000000..fcb078d16
--- /dev/null
+++ b/packages/bcode-browser/src/telemetry.ts
@@ -0,0 +1,45 @@
+// Telemetry key injection.
+//
+// At build time, `packages/opencode/script/build.ts` substitutes
+// `BCODE_DEFAULT_LMNR_KEY` with a string literal via Bun's `define`. The
+// release workflow sources that value from a GitHub Actions secret; local
+// `bun run build` invocations leave it empty, so self-builds never emit
+// telemetry.
+//
+// At runtime we set `LMNR_PROJECT_API_KEY` from the embedded default if and
+// only if:
+//   - DO_NOT_TRACK is not set (any non-empty value opts out — DO_NOT_TRACK
+//     standard convention), AND
+//   - LMNR_PROJECT_API_KEY is not already set in the environment (BYO key
+//     wins; explicit empty string is respected as "no key please"), AND
+//   - the embedded default is non-empty.
+//
+// `applyTelemetryKey()` is invoked as a side effect on module import (last
+// statement of this file). Because `packages/opencode/src/index.ts` imports
+// this module before any other module that might consume the env var, the
+// gate is guaranteed to run before any downstream module-load code can
+// observe `LMNR_PROJECT_API_KEY` — sidestepping ESM static-import hoisting
+// entirely.
+
+declare const BCODE_DEFAULT_LMNR_KEY: string
+
+export const applyTelemetryKey = () => {
+  // DO_NOT_TRACK: presence with any non-empty value opts out, per the
+  // de-facto standard (consoledonottrack.com, Astro, Homebrew, npm).
+  if (process.env.DO_NOT_TRACK) return
+  // LMNR_PROJECT_API_KEY: presence (not truthiness) wins so users who
+  // explicitly set it to an empty string get exactly that — no key.
+  if (process.env.LMNR_PROJECT_API_KEY !== undefined) return
+  // `typeof` first: in dev (no Bun `define` substitution) the identifier is
+  // undeclared and a direct read throws ReferenceError.
+  if (typeof BCODE_DEFAULT_LMNR_KEY === "undefined" || !BCODE_DEFAULT_LMNR_KEY) return
+  process.env.LMNR_PROJECT_API_KEY = BCODE_DEFAULT_LMNR_KEY
+}
+
+// Run as an import side effect: this module is imported as the very first
+// import of `packages/opencode/src/index.ts`, so by the time any other
+// module's top-level code reads `LMNR_PROJECT_API_KEY` the gate has already
+// resolved.
+applyTelemetryKey()
+
+export * as Telemetry from "./telemetry"
diff --git a/packages/opencode/script/build.ts b/packages/opencode/script/build.ts
index 8f8b224f4..d89972744 100755
--- a/packages/opencode/script/build.ts
+++ b/packages/opencode/script/build.ts
@@ -235,6 +235,10 @@ for (const item of targets) {
       OPENCODE_WORKER_PATH: workerPath,
       OPENCODE_CHANNEL: `'${Script.channel}'`,
       OPENCODE_LIBC: item.os === "linux" ? `'${item.abi ?? "glibc"}'` : "",
+      // Build-time-embedded Laminar project key. Populated by release CI from
+      // the LMNR_PROJECT_API_KEY_OSS secret; empty for local builds. Runtime
+      // use is gated in @browser-use/bcode-browser/src/telemetry.ts.
+      BCODE_DEFAULT_LMNR_KEY: JSON.stringify(process.env.BCODE_DEFAULT_LMNR_KEY ?? ""),
     },
   })
 
diff --git a/packages/opencode/src/index.ts b/packages/opencode/src/index.ts
index 86bda3960..272df358a 100644
--- a/packages/opencode/src/index.ts
+++ b/packages/opencode/src/index.ts
@@ -1,3 +1,9 @@
+// Telemetry key injection runs as an import side effect of this module,
+// before any subsequent import is evaluated. Keep this as the FIRST import
+// so the LMNR_PROJECT_API_KEY env var is settled before any downstream
+// module-load code reads it.
+import "@browser-use/bcode-browser/telemetry"
+
 import yargs from "yargs"
 import { hideBin } from "yargs/helpers"
 import { RunCommand } from "./cli/cmd/run"