diff --git a/package-lock.json b/package-lock.json
index 74451ff75..d24535499 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -757,6 +757,15 @@
 			"resolved": "packages/chord",
 			"link": true
 		},
+		"node_modules/@earendil-works/dquickts": {
+			"version": "0.2.0",
+			"resolved": "https://registry.npmjs.org/@earendil-works/dquickts/-/dquickts-0.2.0.tgz",
+			"integrity": "sha512-Wlg2tN0xHgWNf3yS6KWenzlLY/EQ0ifS0Qj0wbYi4/7cT+X5saQkVFNyPzRHYvo0kuF4e6hWQJsyvG+0pb27lQ==",
+			"license": "MIT",
+			"engines": {
+				"node": ">=22.18.0"
+			}
+		},
 		"node_modules/@earendil-works/gondolin": {
 			"version": "0.14.0",
 			"resolved": "https://registry.npmjs.org/@earendil-works/gondolin/-/gondolin-0.14.0.tgz",
@@ -4720,12 +4729,6 @@
 				"once": "^1.3.1"
 			}
 		},
-		"node_modules/quickjs-wasi": {
-			"version": "3.6.2",
-			"resolved": "https://registry.npmjs.org/quickjs-wasi/-/quickjs-wasi-3.6.2.tgz",
-			"integrity": "sha512-FCqGtGOrMgzUiIrMNMA2YnsOxCNwo31dzqXvclXUC6xeT35NJLKXQJsvbeCTjvoFAwZgEAPg8U6+KAPDGXn8Mg==",
-			"license": "MIT"
-		},
 		"node_modules/rc": {
 			"version": "1.2.8",
 			"resolved": "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz",
@@ -5830,7 +5833,7 @@
 			"version": "1.4.0",
 			"license": "MIT",
 			"dependencies": {
-				"quickjs-wasi": "3.6.2"
+				"@earendil-works/dquickts": "0.2.0"
 			},
 			"devDependencies": {
 				"shx": "0.3.4",
@@ -5845,6 +5848,7 @@
 			"version": "1.4.0",
 			"license": "MIT",
 			"dependencies": {
+				"@earendil-works/dquickts": "0.2.0",
 				"@earendil-works/pi-agent-core": "1.4.0",
 				"@earendil-works/pi-ai": "1.4.0",
 				"@earendil-works/pi-codemode": "1.4.0",
@@ -5862,7 +5866,6 @@
 				"jiti": "2.7.0",
 				"minimatch": "10.2.6",
 				"proper-lockfile": "4.1.2",
-				"quickjs-wasi": "3.6.2",
 				"semver": "7.8.5",
 				"typebox": "1.3.27",
 				"undici": "8.12.3",
diff --git a/packages/codemode/CHANGELOG.md b/packages/codemode/CHANGELOG.md
index decd59f9e..cde6c3066 100644
--- a/packages/codemode/CHANGELOG.md
+++ b/packages/codemode/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## [Unreleased]
 
+### Breaking Changes
+
+- Scripts now run on dquickts (`@earendil-works/dquickts`, Bellard's QuickJS compiled to WebAssembly) instead of `quickjs-wasi` (QuickJS-NG). Hosts that pass their own `wasm` must pass `@earendil-works/dquickts/quickjs.wasm`; `loadQuickJSWasm()`, `cloudflareQuickJSWasm`, and `createInlineCodemodeSandbox()` load it already. Scripts run about 1.3 to 1.9 times faster, and the Wrangler bundle grows from about 640 KB to 850 KB
+- Deep recursion in a script now throws a catchable `InternalError: stack overflow` instead of `RangeError: Maximum call stack size exceeded`. The inline and remote sandboxes allow about 950 calls instead of 1,000
+- Deterministic runs: the engine is part of the VM fingerprint, so a run started before this version reports a different fingerprint and is not replayed on it. `Math.random()` gives other values for the same seed
+
 ## [1.4.0] - 2026-10-21
 
 ## [1.3.0] - 2026-10-15
diff --git a/packages/codemode/README.md b/packages/codemode/README.md
index e4fa87786..64162512e 100644
--- a/packages/codemode/README.md
+++ b/packages/codemode/README.md
@@ -105,7 +105,7 @@ Supported fields are `max_output_tokens`, a token budget for the output, and `ti
 
 ## Bundled Node and Bun hosts
 
-By default `CodemodeSandbox` loads `quickjs-wasi/quickjs.wasm` from the installed package and starts the worker file that sits next to this package's module. Neither exists on disk when the host is bundled, so pass both:
+By default `CodemodeSandbox` loads `@earendil-works/dquickts/quickjs.wasm` from the installed package and starts the worker file that sits next to this package's module. Neither exists on disk when the host is bundled, so pass both:
 
 ```ts
 import { CodemodeSandbox, loadQuickJSWasm } from "@earendil-works/pi-codemode";
@@ -170,7 +170,7 @@ export default {
 }
 ```
 
-Install `@earendil-works/pi-codemode` in the sandbox Worker's project and run `npx wrangler deploy`. Wrangler bundles QuickJS (about 640 KB) as a compiled WebAssembly module. The object has no routes and keeps no state, and it never uses its storage.
+Install `@earendil-works/pi-codemode` in the sandbox Worker's project and run `npx wrangler deploy`. Wrangler bundles QuickJS (about 850 KB) as a compiled WebAssembly module. The object has no routes and keeps no state, and it never uses its storage.
 
 ### Using it from the agent's Worker
 
@@ -369,6 +369,6 @@ The worker keeps script execution off the host thread: QuickJS runs synchronousl
 
 ## Runtime notes
 
-- Node and Bun support memory limits, interrupts, and a catchable `RangeError` for deep recursion (QuickJS's stack guard is enabled; without it the wasm stack overflows and traps). Bun may delay worker exit during non-interruptible built-ins; results do not wait for exit.
+- Node and Bun support memory limits, interrupts, and a catchable `InternalError: stack overflow` for deep recursion (QuickJS's stack guard is enabled; without it the wasm stack overflows and traps). Bun may delay worker exit during non-interruptible built-ins; results do not wait for exit.
 - Stack traces use QuickJS frames (`at f (codemode.js:2:31)`), prefixed with `Name: message` like V8. The wrapper prefix shares line 1 with the script, so line numbers are exact; column numbers on line 1 are shifted.
 - QuickJS is an interpreter. Glue code and filtering tool results are fast enough; heavy computation is slower than in V8.
diff --git a/packages/codemode/package.json b/packages/codemode/package.json
index b1f0fea9c..7397b319b 100644
--- a/packages/codemode/package.json
+++ b/packages/codemode/package.json
@@ -67,7 +67,7 @@
 		"node": ">=22.19.0"
 	},
 	"dependencies": {
-		"quickjs-wasi": "3.6.2"
+		"@earendil-works/dquickts": "0.2.0"
 	},
 	"devDependencies": {
 		"shx": "0.3.4",
diff --git a/packages/codemode/src/cloudflare-modules.d.ts b/packages/codemode/src/cloudflare-modules.d.ts
index e6cb6faed..045f78bb2 100644
--- a/packages/codemode/src/cloudflare-modules.d.ts
+++ b/packages/codemode/src/cloudflare-modules.d.ts
@@ -10,7 +10,7 @@ declare module "cloudflare:workers" {
 	}
 }
 
-// A pattern, not the exact specifier: coding-agent declares "quickjs-wasi/quickjs.wasm" as a path
+// A pattern, not the exact specifier: coding-agent declares "@earendil-works/dquickts/quickjs.wasm" as a path
 // for Bun, and an exact declaration takes precedence where both are visible. cloudflare.ts casts the
 // import to the compiled module Wrangler actually produces.
 declare module "*/quickjs.wasm" {
diff --git a/packages/codemode/src/cloudflare.ts b/packages/codemode/src/cloudflare.ts
index e7a5bc11b..cd27464e7 100644
--- a/packages/codemode/src/cloudflare.ts
+++ b/packages/codemode/src/cloudflare.ts
@@ -13,7 +13,7 @@
  *   that computes blocks the caller until it awaits a tool or uses up its interrupt budget.
  */
 import { DurableObject } from "cloudflare:workers";
-import quickjsWasmImport from "quickjs-wasi/quickjs.wasm";
+import quickjsWasmImport from "@earendil-works/dquickts/quickjs.wasm";
 import {
 	DEFAULT_INTERRUPT_BUDGET,
 	InlineCodemodeSandbox,
@@ -31,7 +31,7 @@ const quickjsWasm = quickjsWasmImport as unknown as CodemodeWasmModule;
 /** Default VM memory limit of {@link CodemodeSandboxDurableObject}. Isolates have 128 MB in total. */
 export const DEFAULT_REMOTE_MEMORY_LIMIT_BYTES = 32 * 1024 * 1024;
 
-/** `quickjs-wasi/quickjs.wasm`, compiled by Wrangler. */
+/** `@earendil-works/dquickts/quickjs.wasm`, compiled by Wrangler. */
 export const cloudflareQuickJSWasm: CodemodeWasmModule = quickjsWasm;
 
 /** `InlineCodemodeSandbox` with the QuickJS module Wrangler bundled. */
diff --git a/packages/codemode/src/runtime/inline.ts b/packages/codemode/src/runtime/inline.ts
index dd183a6c5..5716f418f 100644
--- a/packages/codemode/src/runtime/inline.ts
+++ b/packages/codemode/src/runtime/inline.ts
@@ -38,12 +38,12 @@ import { startVm } from "./vm.ts";
 
 export const DEFAULT_INTERRUPT_BUDGET = 100_000;
 
-/** Allows recursion about 1,000 calls deep and trips well before a 1 MB host stack overflows. */
+/** Allows recursion about 950 calls deep and trips well before a 1 MB host stack overflows. */
 export const INLINE_MAX_STACK_SIZE = 256 * 1024;
 
 export interface InlineCodemodeSandboxOptions extends CodemodeSandboxBaseOptions {
 	/**
-	 * Compiled `quickjs-wasi/quickjs.wasm`. On Cloudflare, import it with Wrangler's `CompiledWasm`
+	 * Compiled `@earendil-works/dquickts/quickjs.wasm`. On Cloudflare, import it with Wrangler's `CompiledWasm`
 	 * rule (`@earendil-works/pi-codemode/cloudflare` does this); on Node, `loadQuickJSWasm()`.
 	 */
 	wasm: CodemodeWasmModule | Promise<CodemodeWasmModule>;
diff --git a/packages/codemode/src/runtime/protocol.ts b/packages/codemode/src/runtime/protocol.ts
index 0f1e126a4..0063a04b2 100644
--- a/packages/codemode/src/runtime/protocol.ts
+++ b/packages/codemode/src/runtime/protocol.ts
@@ -28,7 +28,7 @@ export interface VmStartData {
 }
 
 export interface WorkerData extends VmStartData {
-	/** Compiled `quickjs-wasi` module. Structured clone shares the compiled code with the worker. */
+	/** Compiled `@earendil-works/dquickts` module. Structured clone shares the compiled code with the worker. */
 	wasm: CodemodeWasmModule;
 	/**
 	 * One Int32 the host sets to non-zero before terminating the worker. The VM's interrupt handler
diff --git a/packages/codemode/src/runtime/vm.ts b/packages/codemode/src/runtime/vm.ts
index 2618eef9b..988f5ee35 100644
--- a/packages/codemode/src/runtime/vm.ts
+++ b/packages/codemode/src/runtime/vm.ts
@@ -35,7 +35,7 @@
  * The VM reports `started` with its fingerprint before the script runs, and `idle` with the number of calls issued
  * after each drain, so the host can check a replay step by step.
  */
-import { Intrinsics, JSException, type JSValueHandle, MAX_STACK_SIZE, QuickJS } from "quickjs-wasi";
+import { Intrinsics, JSException, type JSValueHandle, MAX_STACK_SIZE, QuickJS } from "@earendil-works/dquickts";
 import type { CodemodeWasmModule } from "../wasm.ts";
 import { PRELUDE_SOURCE } from "./prelude-source.ts";
 import type { HostToWorkerMessage, VmStartData, WorkerToHostMessage } from "./protocol.ts";
@@ -50,7 +50,8 @@ export interface StartVmOptions {
 	data: VmStartData;
 	wasm: CodemodeWasmModule;
 	/**
-	 * QuickJS's guard on its own stack, which turns deep recursion into a catchable `RangeError`.
+	 * QuickJS's guard on its own stack, which turns deep recursion into a catchable
+	 * `InternalError: stack overflow`.
 	 * The wasm frames also use the host thread's native stack, so the guard must trip before that
 	 * stack runs out: a host overflow fails the whole execution instead. Default: `MAX_STACK_SIZE`
 	 * (512 KiB), which fits the 4 MB stack of a Node worker thread but not a 1 MB main thread.
@@ -171,7 +172,7 @@ export async function startVm(options: StartVmOptions): Promise<VmSession> {
 		wasm: options.wasm,
 		memoryLimit: data.memoryLimitBytes,
 		// Without a guard, deep recursion overflows the wasm stack and traps instead of throwing a
-		// catchable RangeError.
+		// catchable InternalError.
 		maxStackSize,
 		interruptHandler: options.shouldInterrupt,
 		wasi: clock ? deterministicWasi(clock) : discardOutput,
@@ -235,15 +236,13 @@ export async function startVm(options: StartVmOptions): Promise<VmSession> {
 	let api: JSValueHandle;
 	let settle: JSValueHandle;
 	let stalled: JSValueHandle;
-	// `executePendingJobs()` runs the queue to empty without a chance to interrupt, so jobs run one at a
-	// time through the (internal, but public) exports; quickjs-wasi is pinned to an exact version.
-	const exports = vm._getExports();
+	// `executePendingJobs()` runs the queue to empty without a chance to interrupt, so jobs run one at a time.
 	/** Run queued jobs, then fail a script that waits on nothing that can ever resume it. */
 	const drain = () => {
 		let jobs = 0;
-		while (exports.qjs_is_job_pending()) {
-			// A job only fails for uncatchable errors, such as an interrupt.
-			if (exports.qjs_execute_pending_job() < 0) throw new Error("Promise job failed");
+		while (vm.isJobPending()) {
+			// Script errors, interruptions included, reject their promise; this only throws if the job itself fails.
+			vm.executePendingJob();
 			if (++jobs % JOBS_PER_POLL === 0 && options.shouldInterrupt()) throw new Error("Execution interrupted");
 		}
 		vm.callFunction(stalled, api).dispose();
@@ -316,7 +315,7 @@ export async function startVm(options: StartVmOptions): Promise<VmSession> {
 			const budget = options.interruptBudget ?? "none";
 			post({
 				type: "started",
-				fingerprint: `quickjs-wasi ${versions["quickjs-wasi"]}, quickjs ${versions.quickjs}, prelude ${PRELUDE_HASH}, deterministic ${DETERMINISTIC_VERSION}, stack ${maxStackSize}, heap ${data.memoryLimitBytes ?? "none"}, budget ${budget}`,
+				fingerprint: `dquickts ${versions.dquickts}, quickjs ${versions.quickjs}, prelude ${PRELUDE_HASH}, deterministic ${DETERMINISTIC_VERSION}, stack ${maxStackSize}, heap ${data.memoryLimitBytes ?? "none"}, budget ${budget}`,
 			});
 		}
 
diff --git a/packages/codemode/src/types.ts b/packages/codemode/src/types.ts
index e69cd290f..9a8b72312 100644
--- a/packages/codemode/src/types.ts
+++ b/packages/codemode/src/types.ts
@@ -134,8 +134,8 @@ export interface CodemodeSandboxBaseOptions {
 /** Options of `CodemodeSandbox`, which runs each VM in a Node or Bun worker thread. */
 export interface CodemodeSandboxOptions extends CodemodeSandboxBaseOptions {
 	/**
-	 * Compiled `quickjs-wasi/quickjs.wasm`, usually from {@link loadQuickJSWasm}. Default:
-	 * `loadQuickJSWasm()`, the file in the installed `quickjs-wasi` package. Pass it when that file
+	 * Compiled `@earendil-works/dquickts/quickjs.wasm`, usually from {@link loadQuickJSWasm}. Default:
+	 * `loadQuickJSWasm()`, the file in the installed `@earendil-works/dquickts` package. Pass it when that file
 	 * is not on disk, for example in a Bun compiled executable.
 	 */
 	wasm?: CodemodeWasmModule | Promise<CodemodeWasmModule>;
diff --git a/packages/codemode/src/wasm.ts b/packages/codemode/src/wasm.ts
index 7e2edec34..197e8b2fa 100644
--- a/packages/codemode/src/wasm.ts
+++ b/packages/codemode/src/wasm.ts
@@ -2,7 +2,7 @@ import { readFile } from "node:fs/promises";
 import { createRequire } from "node:module";
 
 /**
- * A compiled `WebAssembly.Module` of `quickjs-wasi/quickjs.wasm`. Typed opaquely because the Node
+ * A compiled `WebAssembly.Module` of `@earendil-works/dquickts/quickjs.wasm`. Typed opaquely because the Node
  * type definitions do not declare the WebAssembly globals (they live in the DOM lib).
  */
 export type CodemodeWasmModule = object;
@@ -15,11 +15,11 @@ const modules = new Map<string, Promise<CodemodeWasmModule>>();
 
 /**
  * Read and compile the QuickJS wasm once per path. `path` defaults to the file in the installed
- * `quickjs-wasi` package; pass it when that file lives elsewhere, for example embedded in a Bun
+ * `@earendil-works/dquickts` package; pass it when that file lives elsewhere, for example embedded in a Bun
  * compiled executable. A failed load is retried on the next call.
  */
 export function loadQuickJSWasm(path?: string): Promise<CodemodeWasmModule> {
-	const resolved = path ?? createRequire(import.meta.url).resolve("quickjs-wasi/quickjs.wasm");
+	const resolved = path ?? createRequire(import.meta.url).resolve("@earendil-works/dquickts/quickjs.wasm");
 	let module = modules.get(resolved);
 	if (!module) {
 		const { WebAssembly } = globalThis as unknown as { WebAssembly: WebAssemblyGlobal };
diff --git a/packages/codemode/test/deterministic.test.ts b/packages/codemode/test/deterministic.test.ts
index cb5d7895a..b54bff8e0 100644
--- a/packages/codemode/test/deterministic.test.ts
+++ b/packages/codemode/test/deterministic.test.ts
@@ -194,7 +194,7 @@ for (const [backend, create] of Object.entries(BACKENDS)) {
 			]);
 			const fingerprint = recorded.fingerprint()!;
 			expect(fingerprint).toMatch(
-				/^quickjs-wasi \S+, quickjs \S+, prelude [0-9a-f]{8}, deterministic \d+, stack \d+, heap 67108864, budget \S+$/,
+				/^dquickts \S+, quickjs \S+, prelude [0-9a-f]{8}, deterministic \d+, stack \d+, heap 67108864, budget \S+$/,
 			);
 			if (backend === "remote") expect(fingerprint).toContain(`budget ${BUDGET}`);
 			else expect(fingerprint).toContain("budget none");
@@ -404,7 +404,7 @@ async function waitFor(check: () => boolean): Promise<void> {
 }
 
 /** The first two `Math.random()` values with seed 0. */
-const PINNED_SEED_ZERO = [0.6711372530266764, 0.7258461452833667];
+const PINNED_SEED_ZERO = [0.28083505005035936, 0.6711372530266764];
 
 /** The first `Math.random()` with seed 1. */
-const PINNED_FIRST_RANDOM = 0.34227450605335275;
+const PINNED_FIRST_RANDOM = 0.5616701001007189;
diff --git a/packages/codemode/test/sandbox.test.ts b/packages/codemode/test/sandbox.test.ts
index 27d36bc4e..f9c338fb9 100644
--- a/packages/codemode/test/sandbox.test.ts
+++ b/packages/codemode/test/sandbox.test.ts
@@ -584,6 +584,24 @@ describe.each(Object.keys(BACKENDS))("%s backend", (name) => {
 			expect(result).toMatchObject({ ok: false, error: { kind: "timeout" } });
 		});
 
+		it("calls no tool after an interrupted async function", async () => {
+			// The interrupted function's rejection handler and the code after its call must not run.
+			let calls = 0;
+			const sandbox = createSandbox([{ name: "side", execute: () => ++calls }]);
+			const result = await sandbox.execute(
+				"const p = (async () => { while (true) {} })(); p.catch(() => tools.side()); tools.side(); await p",
+				{ timeoutMs: 200 },
+			);
+			expect(result).toMatchObject({ ok: false, error: { kind: "timeout" } });
+			expect(calls).toBe(0);
+		});
+
+		it("terminates a loop of interrupted async functions on timeout", async () => {
+			const sandbox = createSandbox();
+			const result = await sandbox.execute("while (true) (async () => { while (true) {} })()", { timeoutMs: 200 });
+			expect(result).toMatchObject({ ok: false, error: { kind: "timeout" } });
+		});
+
 		it("aborts via signal and cancels in-flight calls", async () => {
 			const controller = new AbortController();
 			let toolSignal: AbortSignal | undefined;
@@ -671,14 +689,14 @@ describe.each(Object.keys(BACKENDS))("%s backend", (name) => {
 			expect(results.map((result) => (result.ok ? result.value : result.error))).toEqual(["a", "b", "undefined"]);
 		});
 
-		it("turns deep recursion into a catchable RangeError", async () => {
+		it("turns deep recursion into a catchable InternalError", async () => {
 			const sandbox = createSandbox();
 			const result = await sandbox.execute(`
 				let depth = 0;
 				function dive() { depth++; dive(); }
-				try { dive(); } catch (error) { return [error.name, depth > 1000]; }
+				try { dive(); } catch (error) { return [error.name, depth > 900]; }
 			`);
-			expect(result).toMatchObject({ ok: true, value: ["RangeError", true] });
+			expect(result).toMatchObject({ ok: true, value: ["InternalError", true] });
 		});
 	});
 
diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 0af338b96..264b5c0ad 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -12,6 +12,7 @@
 
 - `pi update` for installs from the pi.dev installer no longer passes `--min-release-age=0` to `npm ci`. The release lockfile pins every package, so the flag had no effect, and security scanners that block it stopped the update ([#11262](https://github.com/earendil-works/pi/issues/11262))
 - `/model` and `/scoped-models` now show a model's name next to its ID when the name adds words the ID lacks, such as a renamed `models.json` override ([#5916](https://github.com/earendil-works/pi/issues/5916), [#11347](https://github.com/earendil-works/pi/pull/11347))
+- Code mode scripts now run on dquickts (`@earendil-works/dquickts`) instead of `quickjs-wasi`, about 1.3 to 1.9 times faster. Deep recursion in a script now fails with `InternalError: stack overflow` instead of `RangeError`
 
 ### Fixed
 
diff --git a/packages/coding-agent/install-lock/package-lock.json b/packages/coding-agent/install-lock/package-lock.json
index 25e273cf6..081f3fe33 100644
--- a/packages/coding-agent/install-lock/package-lock.json
+++ b/packages/coding-agent/install-lock/package-lock.json
@@ -385,6 +385,15 @@
 				"node": ">=6.9.0"
 			}
 		},
+		"node_modules/@earendil-works/dquickts": {
+			"version": "0.2.0",
+			"resolved": "https://registry.npmjs.org/@earendil-works/dquickts/-/dquickts-0.2.0.tgz",
+			"integrity": "sha512-Wlg2tN0xHgWNf3yS6KWenzlLY/EQ0ifS0Qj0wbYi4/7cT+X5saQkVFNyPzRHYvo0kuF4e6hWQJsyvG+0pb27lQ==",
+			"license": "MIT",
+			"engines": {
+				"node": ">=22.18.0"
+			}
+		},
 		"node_modules/@earendil-works/pi-agent-core": {
 			"version": "1.4.0",
 			"resolved": "https://registry.npmjs.org/@earendil-works/pi-agent-core/-/pi-agent-core-1.4.0.tgz",
@@ -485,7 +494,7 @@
 			"resolved": "https://registry.npmjs.org/@earendil-works/pi-codemode/-/pi-codemode-1.4.0.tgz",
 			"license": "MIT",
 			"dependencies": {
-				"quickjs-wasi": "3.6.2"
+				"@earendil-works/dquickts": "0.2.0"
 			},
 			"engines": {
 				"node": ">=22.19.0"
@@ -496,6 +505,7 @@
 			"resolved": "https://registry.npmjs.org/@earendil-works/pi-coding-agent/-/pi-coding-agent-1.4.0.tgz",
 			"license": "MIT",
 			"dependencies": {
+				"@earendil-works/dquickts": "0.2.0",
 				"@earendil-works/pi-agent-core": "1.4.0",
 				"@earendil-works/pi-ai": "1.4.0",
 				"@earendil-works/pi-codemode": "1.4.0",
@@ -513,7 +523,6 @@
 				"jiti": "2.7.0",
 				"minimatch": "10.2.6",
 				"proper-lockfile": "4.1.2",
-				"quickjs-wasi": "3.6.2",
 				"semver": "7.8.5",
 				"typebox": "1.3.27",
 				"undici": "8.12.3",
@@ -1326,12 +1335,6 @@
 				"node": ">= 20"
 			}
 		},
-		"node_modules/quickjs-wasi": {
-			"version": "3.6.2",
-			"resolved": "https://registry.npmjs.org/quickjs-wasi/-/quickjs-wasi-3.6.2.tgz",
-			"integrity": "sha512-FCqGtGOrMgzUiIrMNMA2YnsOxCNwo31dzqXvclXUC6xeT35NJLKXQJsvbeCTjvoFAwZgEAPg8U6+KAPDGXn8Mg==",
-			"license": "MIT"
-		},
 		"node_modules/retry": {
 			"version": "0.13.1",
 			"resolved": "https://registry.npmjs.org/retry/-/retry-0.13.1.tgz",
diff --git a/packages/coding-agent/package.json b/packages/coding-agent/package.json
index 0e452d9b5..3321d1806 100644
--- a/packages/coding-agent/package.json
+++ b/packages/coding-agent/package.json
@@ -41,6 +41,7 @@
 		"prepublishOnly": "npm run clean && npm run build"
 	},
 	"dependencies": {
+		"@earendil-works/dquickts": "0.2.0",
 		"@earendil-works/pi-agent-core": "1.4.0",
 		"@earendil-works/pi-ai": "1.4.0",
 		"@earendil-works/pi-codemode": "1.4.0",
@@ -58,7 +59,6 @@
 		"jiti": "2.7.0",
 		"minimatch": "10.2.6",
 		"proper-lockfile": "4.1.2",
-		"quickjs-wasi": "3.6.2",
 		"semver": "7.8.5",
 		"typebox": "1.3.27",
 		"undici": "8.12.3",
diff --git a/packages/coding-agent/src/bun/quickjs-wasm.d.ts b/packages/coding-agent/src/bun/quickjs-wasm.d.ts
index 27d94a780..a6e3bb7f3 100644
--- a/packages/coding-agent/src/bun/quickjs-wasm.d.ts
+++ b/packages/coding-agent/src/bun/quickjs-wasm.d.ts
@@ -1,5 +1,5 @@
 // Imported by runtime-setup.ts. Bun's default loader for .wasm evaluates to the file's path.
-declare module "quickjs-wasi/quickjs.wasm" {
+declare module "@earendil-works/dquickts/quickjs.wasm" {
 	const path: string;
 	export default path;
 }
diff --git a/packages/coding-agent/src/bun/runtime-setup.ts b/packages/coding-agent/src/bun/runtime-setup.ts
index 20b66365f..702802866 100644
--- a/packages/coding-agent/src/bun/runtime-setup.ts
+++ b/packages/coding-agent/src/bun/runtime-setup.ts
@@ -1,8 +1,8 @@
+// Bun loads .wasm imports as files: embedded in compiled executables, evaluating to a readable path.
+import quickjsWasmPath from "@earendil-works/dquickts/quickjs.wasm";
 import { bedrockProviderModule } from "@earendil-works/pi-ai/bedrock-provider";
 import { registerBunOAuthFlows } from "@earendil-works/pi-ai/bun-oauth";
 import { setBedrockProviderModule } from "@earendil-works/pi-ai/compat";
-// Bun loads .wasm imports as files: embedded in compiled executables, evaluating to a readable path.
-import quickjsWasmPath from "quickjs-wasi/quickjs.wasm";
 import { APP_NAME, setEmbeddedQuickJSWasmPath } from "../config.ts";
 
 process.title = APP_NAME;
diff --git a/packages/coding-agent/src/config.ts b/packages/coding-agent/src/config.ts
index 61dd63f38..0b332b590 100644
--- a/packages/coding-agent/src/config.ts
+++ b/packages/coding-agent/src/config.ts
@@ -488,11 +488,11 @@ export function setEmbeddedQuickJSWasmPath(path: string): void {
 }
 
 /**
- * Get path to `quickjs-wasi/quickjs.wasm`, the VM that runs codemode scripts. Resolved once so the
+ * Get path to `@earendil-works/dquickts/quickjs.wasm`, the VM that runs codemode scripts. Resolved once so the
  * compiled module cached per path keeps working after an update removes this install (#10439).
  */
 export function getQuickJSWasmPath(): string {
-	quickJSWasmPath ??= createRequire(import.meta.url).resolve("quickjs-wasi/quickjs.wasm");
+	quickJSWasmPath ??= createRequire(import.meta.url).resolve("@earendil-works/dquickts/quickjs.wasm");
 	return quickJSWasmPath;
 }
 
diff --git a/packages/durable/test/codemode-imports.test.ts b/packages/durable/test/codemode-imports.test.ts
index df74da0e2..1d8f85557 100644
--- a/packages/durable/test/codemode-imports.test.ts
+++ b/packages/durable/test/codemode-imports.test.ts
@@ -2,8 +2,8 @@ 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");
+vi.mock("@earendil-works/dquickts", () => {
+	throw new Error("the Code Mode extension loaded @earendil-works/dquickts");
 });
 
 test("the Code Mode extension loads without pi-codemode's WASM runtime", () => {