What's new
What's new on Sekai
Sekai keeps itself up to date — there is nothing for you to install. If your assistant ever says it is missing a permission, reconnect it and it will pick up whatever is new.
November 7, 2026
Google Antigravity can now connect to Sekai; admins can manage allowed OAuth redirect hosts on /access.
November 7, 2026
Tool schemas now show every parameter's type and each tool's title in its annotations, as directory listings require.
November 7, 2026
Fixed some bugs and made a few improvements.
November 4, 2026
Upload tokens without session consent now get a 401, so the client signs in again and sees the consent page (#85).
November 4, 2026
Game uploads now include the project conversation. Production stores these sessions privately with no automatic expiration. Reconnect once to accept the policy.
November 4, 2026
A published game's link now opens its page on sekai.ai. Fixed: uploads could fail for a while right after your sign-in renewed; they now keep going.
November 3, 2026
New: /sekai — describe a game in a line, like "a rhythm game about cats", and your agent builds it for Sekai, start to finish. It's listed first; agents without slash commands can ask for it by name.
October 23, 2026
Fixed some bugs and made a few improvements.
October 23, 2026
Fixed some bugs and made a few improvements.
October 23, 2026
Fixed some bugs and made a few improvements.
October 16, 2026
Fixed some bugs and made a few improvements.
October 15, 2026
Fixed some bugs and made a few improvements.
October 9, 2026
Fixed some bugs and made a few improvements.
October 9, 2026
New: sekai-inspired — make a new game from what makes another game fun. Both workflows (sekailize and sekai-inspired) now also work in agents without slash commands, like Codex: ask for them by name.
October 8, 2026
Fixed some bugs and made a few improvements.
September 30, 2026
When your agent finishes updating a game, it now asks whether you want to publish the new version, and tells you where to do it.
September 17, 2026
Small fixes and steadier behaviour under the hood. Nothing changes in how you use Sekai from here.
September 16, 2026
Small fixes and steadier behaviour under the hood. Nothing changes in how you use Sekai from here.
September 16, 2026
Small fixes and steadier behaviour under the hood. Nothing changes in how you use Sekai from here.
September 15, 2026
Your agent now knows when to wait and when to stop: it backs off while Sekai is importing a game, and it stops instead of retrying when an account is still on the waitlist. This page is new too.
September 15, 2026
Edit a game you already uploaded. Pass the game and version ids back to sekai_create_upload and your next upload becomes a new version of that same game, with its earlier versions kept, instead of a second copy sitting next to the first.
September 14, 2026
Uploading works again. Your game lands in Sekai as a private draft that only you can open, and you publish it yourself from the Sekai app when it is ready.
September 14, 2026
Your agent now gets the full set of permissions when it connects, so searching the asset library works on the first try instead of failing with a permissions error.
September 13, 2026
First release. Connect a coding agent to Sekai, search the asset library, and build a game with real Sekai assets.