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feat(brainstorm-server): opt-in auto-open of the browser on the first screen

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When the user approves the visual companion, open their browser automatically the
first time a screen is actually ready to show — rather than at startup (just the
waiting page) or making them open the URL by hand.

Opt-in and gated on approval: off unless BRAINSTORM_OPEN is set (start-server.sh
--open, which the agent passes only after the user agrees to use the companion).
Even then it fires once, and is skipped if a browser is already connected, on a
non-loopback/remote bind, or when headless. Launcher is the platform default
(open / xdg-open / WSL cmd.exe) or BRAINSTORM_OPEN_CMD; best-effort, never fatal.

lifecycle.test.js: opens once on the first screen when approved; does NOT open
without approval.

Closes #755
Refs #759
This commit is contained in:
Jesse Vincent
2026-06-09 15:26:19 -07:00
parent b53c62eba8
commit bccc41dffe
3 changed files with 67 additions and 0 deletions
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22
skills/brainstorming/scripts/server.cjs
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@@ -267,6 +267,27 @@ function broadcast(msg) {
}
}
// Best-effort: open the user's browser the first time a screen is actually ready
// to show. Skips when disabled, on a non-loopback (remote) bind, or when a
// browser is already connected. Override the launcher with BRAINSTORM_OPEN_CMD.
let browserOpened = false;
function maybeOpenBrowser() {
if (browserOpened) return;
browserOpened = true;
if (!process.env.BRAINSTORM_OPEN) return; // opt-in: only after the user approves the companion
if (HOST !== '127.0.0.1' && HOST !== 'localhost') return;
if (clients.size > 0) return; // the user already opened it
const url = 'http://' + URL_HOST + ':' + PORT;
let cmd = process.env.BRAINSTORM_OPEN_CMD;
if (!cmd) {
if (process.platform === 'darwin') cmd = 'open';
else if (/microsoft/i.test(require('os').release())) cmd = 'cmd.exe /c start ""'; // WSL → Windows browser
else if (process.env.DISPLAY || process.env.WAYLAND_DISPLAY) cmd = 'xdg-open';
else return; // headless: nothing to open
}
try { require('child_process').exec(cmd + ' ' + JSON.stringify(url), () => {}); } catch (e) { /* best effort */ }
}
// ========== Activity Tracking ==========
// Idle timeout: shut down after this long with no activity. Default 4 hours;
@@ -323,6 +344,7 @@ function startServer() {
const eventsFile = path.join(STATE_DIR, 'events');
if (fs.existsSync(eventsFile)) fs.unlinkSync(eventsFile);
console.log(JSON.stringify({ type: 'screen-added', file: filePath }));
maybeOpenBrowser();
} else {
console.log(JSON.stringify({ type: 'screen-updated', file: filePath }));
}