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feat: green border + gstack label on controlled Chrome window

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Injects a 2px green border and small "gstack" label on every page
loaded in the controlled Chrome window via context.addInitScript().
Users can instantly tell which Chrome window Claude controls.

Also fixes close() for channel:chrome mode (uses browser.close()
not browser.disconnect() which doesn't exist).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-03-21 12:45:06 -07:00
parent 44797ae957
commit acf96dff41
1 changed files with 39 additions and 2 deletions
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browse/src/browser-manager.ts
+39 -2
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@@ -141,6 +141,40 @@ export class BrowserManager {
};
this.context = await this.browser.newContext(contextOptions);
// Inject visual indicator on every page — thin green border so user
// knows this window is controlled by gstack
await this.context.addInitScript(() => {
const injectIndicator = () => {
if (document.getElementById('gstack-controlled-indicator')) return;
// Green border around viewport
const border = document.createElement('div');
border.id = 'gstack-controlled-indicator';
border.style.cssText = `
position: fixed; top: 0; left: 0; right: 0; bottom: 0;
border: 2px solid rgba(74, 222, 128, 0.6);
pointer-events: none; z-index: 2147483647;
`;
// Small label in top-left
const label = document.createElement('div');
label.style.cssText = `
position: fixed; top: 0; left: 0; z-index: 2147483647;
background: rgba(74, 222, 128, 0.9); color: #000;
font: 600 10px -apple-system, sans-serif;
padding: 2px 8px; pointer-events: none;
border-bottom-right-radius: 4px;
letter-spacing: 0.05em;
`;
label.textContent = 'gstack';
document.documentElement.appendChild(border);
document.documentElement.appendChild(label);
};
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', injectIndicator);
} else {
injectIndicator();
}
});
// Create first tab
await this.newTab();
@@ -190,10 +224,13 @@ export class BrowserManager {
async close() {
if (this.browser) {
if (this.connectionMode === 'cdp') {
// CDP mode: disconnect (don't kill user's browser)
// CDP/channel:chrome mode: close the browser we launched
this.intentionalDisconnect = true;
this.browser.removeAllListeners('disconnected');
await this.browser.disconnect().catch(() => {});
await Promise.race([
this.browser.close(),
new Promise(resolve => setTimeout(resolve, 5000)),
]).catch(() => {});
} else {
// Launched mode: close the browser we spawned
this.browser.removeAllListeners('disconnected');