v0.18.0

vercel-labs/agent-browserv0.18.0Mar 12, 2026by github-actions[bot]

AI Summary

Adds developer debugging tools like the `inspect` command for Chrome DevTools and the `get cdp-url` subcommand, while simplifying setup for Browserbase.

Key Highlights

`inspect` command to open Chrome DevTools
`get cdp-url` subcommand for external debugging
Native screenshot annotate flag now works in Rust daemon

New Features

Inspect command
Get CDP URL subcommand
Native screenshot annotate

Full Release Notes

### Minor Changes

-   942b8cd: ### New Features

    -   **`inspect` command** - Opens Chrome DevTools for the active page by launching a local proxy server that forwards the DevTools frontend to the browser's CDP WebSocket. Commands continue to work while DevTools is open. Implemented in both Node.js and native paths. (#736)
    -   **`get cdp-url` subcommand** - Retrieve the Chrome DevTools Protocol WebSocket URL for the active page, useful for external debugging tools. (#736)
    -   **Native screenshot annotate** - The `--annotate` flag for screenshots now works in the native Rust daemon, bringing parity with the Node.js path. (#706)

    ### Improvements

    -   **KERNEL_API_KEY now optional** - External credential injection no longer requires `KERNEL_API_KEY` to be set, making it easier to use Kernel with pre-configured environments. (#687)
    -   **Browserbase simplified** - Removed the `BROWSERBASE_PROJECT_ID` requirement, reducing setup friction for Browserbase users. (#625)

    ### Bug Fixes

    -   Fixed Browserbase API using incorrect endpoint to release sessions (#707)
    -   Fixed CDP connect paths using hardcoded 10s timeout instead of `getDefaultTimeout()` (#704)
    -   Fixed lone Unicode surrogates causing errors by sanitizing with `toWellFormed()` (#720)
    -   Fixed CDP connection failure on IPv6-first systems (#717)
    -   Fixed recordings not inheriting the current viewport settings (#718)