Daytona Standalone Chrome CDP

Use this skill when a Daytona sandbox needs a normal Chrome/Chromium browser in the XFCE display, separate from the Electron app. This is useful for Den Web sign-in, OAuth provider setup, browser-only admin flows, and checking what a user would see in a regular browser.

Launch Chrome

Run inside the Electron or server sandbox:

daytona exec "$SANDBOX" -- "bash -lc 'mkdir -p /tmp/daytona-chrome-profile; DISPLAY=:99 nohup chromium --no-sandbox --disable-dev-shm-usage --remote-debugging-address=0.0.0.0 --remote-debugging-port=9222 --user-data-dir=/tmp/daytona-chrome-profile \"$DEN_WEB_URL\" >/tmp/daytona-chrome.log 2>&1 &'"

If chromium is missing, try google-chrome, google-chrome-stable, or install Chromium in the sandbox only when needed.

Get The CDP URL

CHROME_CDP_URL=$(daytona preview-url "$SANDBOX" -p 9222 2>/dev/null | grep -v '^time=')

Verify the target directly:

curl -fsS "$CHROME_CDP_URL/json/list"

Verify It Is Not Electron

The coded flow must assert that navigator.userAgent contains Chrome/ or Chromium/ and does not contain Electron/.

Drive A Web Flow

Create or reuse an evals/flows/*.flow.mjs flow and set its cdpTarget to a stable title or URL fragment for the standalone page. Drive the visible flow with ctx.clickText, ctx.fill, ctx.waitFor, and ctx.screenshot, then run:

pnpm evals --flow <flow-id> --cdp-url "$CHROME_CDP_URL"

Validate with the fraimz loop. Do not assume navigation or sign-in worked until the post-action URL, visible assertion, and frame prove it.

Common Uses

• Sign into Den Web while Electron remains on the desktop handoff screen.
• Complete OAuth approval pages from a mock or real provider.
• Configure web-only admin state before validating Electron sync.
• Compare Den Web behavior against Electron cloud account behavior.

Stop Chrome

daytona exec "$SANDBOX" -- "bash -lc 'pkill -f \"chromium.*remote-debugging-port=9222\" || pkill -f \"chrome.*remote-debugging-port=9222\" || true'"