diff --git a/skill-src/webcmd-browser/SKILL.src.md b/skill-src/webcmd-browser/SKILL.src.md
index 3ab859ff..60de9aba 100644
--- a/skill-src/webcmd-browser/SKILL.src.md
+++ b/skill-src/webcmd-browser/SKILL.src.md
@@ -184,13 +184,13 @@ For CAPTCHA or raw user takeover, stop automation, give the user any viewer URL
 
 For native controls, inspect structure first, then use Playwright's normal form APIs inside `run`. Do not guess date formats, option labels, or file constraints from memory; read them from the DOM.
 
-`browser run` uses QuickJS, not Node.js: `Buffer` and `TextEncoder` are unavailable. For an in-memory upload, pass bytes directly:
+`browser run` uses QuickJS, not Node.js: `Buffer` is unavailable. For an in-memory upload, pass a `Uint8Array`; encode text with the supported `TextEncoder`:
 
 ```js
 await page.locator('input[type="file"]').setInputFiles({
   name: 'evidence.txt',
   mimeType: 'text/plain',
-  buffer: new Uint8Array([102, 105, 108, 101]),
+  buffer: new TextEncoder().encode('file'),
 });
 ```
 
diff --git a/skills/webcmd-browser/SKILL.md b/skills/webcmd-browser/SKILL.md
index aa255efd..f972f5b7 100644
--- a/skills/webcmd-browser/SKILL.md
+++ b/skills/webcmd-browser/SKILL.md
@@ -184,13 +184,13 @@ For CAPTCHA or raw user takeover, stop automation, give the user any viewer URL
 
 For native controls, inspect structure first, then use Playwright's normal form APIs inside `run`. Do not guess date formats, option labels, or file constraints from memory; read them from the DOM.
 
-`browser run` uses QuickJS, not Node.js: `Buffer` and `TextEncoder` are unavailable. For an in-memory upload, pass bytes directly:
+`browser run` uses QuickJS, not Node.js: `Buffer` is unavailable. For an in-memory upload, pass a `Uint8Array`; encode text with the supported `TextEncoder`:
 
 ```js
 await page.locator('input[type="file"]').setInputFiles({
   name: 'evidence.txt',
   mimeType: 'text/plain',
-  buffer: new Uint8Array([102, 105, 108, 101]),
+  buffer: new TextEncoder().encode('file'),
 });
 ```
 
diff --git a/src/browser/run/runner.test.ts b/src/browser/run/runner.test.ts
index f3284b20..a35796e9 100644
--- a/src/browser/run/runner.test.ts
+++ b/src/browser/run/runner.test.ts
@@ -20,6 +20,7 @@ import {
 } from 'playwright-core';
 import { LocalBrowserRunArtifactSink } from './artifacts.js';
 import { MemorySnapshotBaselineStore } from '../snapshot/index.js';
+import { MemorySnapshotBaselineStore } from '../snapshot/index.js';
 import { unsupportedApiMessage } from './playwright-transport.js';
 import { QuickJSHost } from './quickjs-host.js';
 import { runBrowserProgram } from './runner.js';