Add May 8 changelog entry (#356)

* Add May 8 changelog entry

Covers the public launches and improvements shipped between May 1 and
May 8: the managed-auth-react component library, the Docker sandboxes
mixin kit, project-scoped name uniqueness with server-side search,
several managed auth reliability fixes, the new -o json output on
playwright execute, and related docs and skills updates.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Tighten May 8 changelog entry

Trim the Projects bullet, drop the WebGL "why" tail and the out-of-viewport
clause, generalize the autofill misfires bullet, and remove the auto-reauth
guard bullet per editorial feedback.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: eclairen <236733058+eclairen@users.noreply.github.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: eclairen

changelog.mdx

@@ -9,6 +9,22 @@ import { YouTubeVideo } from '/snippets/youtube-video.mdx';
 For API library updates, see the [Node SDK](https://github.com/onkernel/kernel-node-sdk/blob/main/CHANGELOG.md), [Python SDK](https://github.com/onkernel/kernel-python-sdk/blob/next/CHANGELOG.md), and [Go SDK](https://github.com/onkernel/kernel-go-sdk/blob/main/CHANGELOG.md) changelogs.
 </Note>
 
+<Update label="May 8" tags={["Product", "Docs"]}>
+## Product updates
+
+- Released [`@onkernel/managed-auth-react`](https://github.com/kernel/managed-auth-react), a drop-in React component library for embedding [managed auth](/auth/overview) flows directly into your app. Ship a Kernel-powered login experience without rebuilding the credential entry, MFA, and SSO dialogs yourself.
+- Added a [Docker Sandboxes mixin kit](https://github.com/kernel/docker-sbx-kit) for running Kernel inside Docker's AI sandboxes (`sbx`). The kit ships the [Kernel CLI](https://github.com/kernel/cli), Claude Code [skills](https://github.com/kernel/skills), and a proxy-managed auth header pre-configured, so agents inside the sandbox can call the Kernel API while your real `KERNEL_API_KEY` stays on the host.
+- Extended [Projects](/info/projects): profile, browser pool, extension, and credential names are now scoped per-project, and the `GET /projects` API and dashboard project selector support server-side search and pagination.
+- Made the [1Password](/integrations/1password) credential dropdown searchable in [managed auth](/auth/overview) dialogs.
+- Improved [managed auth](/auth/overview) autofill reliability on multi-step sign-in pages.
+- Added `-o json` output to `kernel browsers playwright execute` in the [CLI](https://github.com/kernel/cli), matching the other `browsers` subcommands, so script runs can be piped into other tooling.
+
+## Documentation updates
+
+- Documented in the [computer controls](/browsers/computer-controls) docs that computer controls screenshots are faster than CDP screenshots on WebGL-heavy pages.
+- Updated `kernel-cli` skill examples in the [Kernel skills repo](https://github.com/kernel/skills) and documented the return value of `playwright execute` so agents can use the result in follow-on steps.
+</Update>
+
 <Update label="May 1" tags={["Product", "Docs"]}>
 ## Product updates