diff --git a/packages/durable/CHANGELOG.md b/packages/durable/CHANGELOG.md
index a913ce222..cf45dd551 100644
--- a/packages/durable/CHANGELOG.md
+++ b/packages/durable/CHANGELOG.md
@@ -123,6 +123,7 @@
 - Fixed a commit that Storage rejects after adopting it (a failed JSONL reclaim) publishing nothing: it is published and its waits resolve before the Session fails, so a replica built from `subscribeCommits()` stays equal to Storage and `pi.durable.tasks.active` stays balanced.
 - Fixed a throwing telemetry adapter (a commit's `pi.durable.entry` or `pi.durable.submission` event, `pi.durable.tasks.active`) rejecting a durable commit and leaving the views and the scheduler without it: it is reported as `host_error` with callback `"telemetry"`, and the commit resolves. A throwing report metric or report event is dropped.
 - Fixed a host that crashes during a model request resending it forever, adding an aborted entry each time: the interrupted request is a failed attempt under the retry policy, and the run ends with `runFailure` reason `interrupted` once no retry is left; other work cut off `restartLimit` times ends instead of keeping its conversation busy ([#11139](https://github.com/earendil-works/pi/issues/11139))
+- Fixed the Code Mode extension loading pi-codemode's WASM QuickJS runtime (`quickjs-wasi`) although it only runs scripts in the sandbox the host passes: it imports `toCodemodeIdentifier` from `@earendil-works/pi-codemode/declarations` instead of `/portable` ([#11254](https://github.com/earendil-works/pi/issues/11254))
 
 ## [1.4.0] - 2026-10-21
 
diff --git a/packages/durable/src/codemode/codemode.ts b/packages/durable/src/codemode/codemode.ts
index dba1d1e57..2b308e2da 100644
--- a/packages/durable/src/codemode/codemode.ts
+++ b/packages/durable/src/codemode/codemode.ts
@@ -37,13 +37,13 @@
 import { type Context, copyJson, type JsonValue } from "@earendil-works/chord";
 import { ownedSlice } from "@earendil-works/chord/delta";
 import type { TextContent } from "@earendil-works/pi-ai";
-import {
-	type CodemodeHostCall,
-	type CodemodeOutcome,
-	type CodemodeResult,
-	type CodemodeRun,
-	type CodemodeSandboxBase,
-	toCodemodeIdentifier,
+import { toCodemodeIdentifier } from "@earendil-works/pi-codemode/declarations";
+import type {
+	CodemodeHostCall,
+	CodemodeOutcome,
+	CodemodeResult,
+	CodemodeRun,
+	CodemodeSandboxBase,
 } from "@earendil-works/pi-codemode/portable";
 import { CODEMODE_SOURCE_GRAMMAR, parseCodemodeSource } from "@earendil-works/pi-codemode/source";
 import { type Static, Type } from "typebox";
diff --git a/packages/durable/test/codemode-imports.test.ts b/packages/durable/test/codemode-imports.test.ts
new file mode 100644
index 000000000..df74da0e2
--- /dev/null
+++ b/packages/durable/test/codemode-imports.test.ts
@@ -0,0 +1,11 @@
+import { expect, test, vi } from "vitest";
+import { createCodemodeExtension } from "../src/codemode/codemode.ts";
+
+// The extension runs scripts in the sandbox the host passes, so loading it must not load the WASM VM (#11254).
+vi.mock("quickjs-wasi", () => {
+	throw new Error("the Code Mode extension loaded quickjs-wasi");
+});
+
+test("the Code Mode extension loads without pi-codemode's WASM runtime", () => {
+	expect(createCodemodeExtension).toBeTypeOf("function");
+});