cetinsert

- everything is local until you deploy

- with first-class support for

  - connect your AI to playground

    - version-controlled deployments

    - full playground control

    - output viewport size, zoom, color scheme control

    - output eval for rapid development

    - output live capture and image-cropped element/region pins

    - output live stream picture-in-picture to watch your agents work

  - state preserving 2-way IO sync

  - multi-level open shadow root IO sync

  - service/edge workers in the playground (develop full-stack apps in one place)

    - example: https://post.rt.ht

    - example: https://kv.rt.ht/fs

    - examples: https://new.rt.ht

  - with built-in auth for deployments: https://elefunc.com/#auth

These days, I don't even code in https://RTCode.io myself, I share the playground with Codex/Claude and let them build me my dreams in the form of full-stack apps! I PiP-watch them live on the side as they work and deploy their work with commit messages!

For more info: https://elefunc.com/#code

For all we know, inference might be dirt cheap, they might just be hiking the API prices so high for us to think subscriptions are subsidized.

Nothing that claimed to be a better GitHub was even GitHub enough to begin with.

GitFar an internal a drop-in replacement for our devs to just change the hostname and keep using exactly the same APIs with exactly the same request and response shapes with extensions delivered through request and response headers!

Cloak windows from screen capture! Perfect for keeping things private while screen sharing over Teams, etc.! All other tools in the Store would trigger virus warnings when I tried to install them. Some were positioned to ask for money for basic features. My app is both free with more features and a more intuitive UI and set of keyboard shortcuts!

Which one do you think is PQ-secure?

https://qi.rt.ht/?pq={api.,}{stripe,paypal}.com

The playground you asked for has already helped me file and fix a bug https://github.com/yippee-fun/morphlex/issues/38 in my brief review of Morphlex.

https://dm.rt.ht/perf

Morphlex is 8→69× faster and 4× smaller!

See https://news.ycombinator.com/item?id=45941553

To see `moveBefore()` in action:

try moving the clock.gif line up/down with Alt+↑ and Alt+↓!

See https://dm.rt.ht

Just updated to demonstrate what `moveBefore()` brings to the table!!

Try moving the clock.gif line up/down with Alt+↑ and Alt+↓!

(it is very nascent, and I am on a plane with shaky Wi-Fi, so I will give it the love it deserves in a couple of days: compare all libraries with each other, add a benchmark, etc.)

It is going to be way better than boutique integrations like Warp's, Cursor's, etc. anyway.

Instead of containers and "stacks", we use the web platform with vanilla HTML, CSS and JS (front-/back-end in 1 place)!

Deployments go to Cloudflare!

See examples at https://new.rt.ht – service workers you can edit live in the playground with URL imports of ESMs, get deployed as Cloudflare Workers!

That was before Opus 4.1 and Codex CLI with GPT 5 High. It would take less time now.

The playground has lots of unique features, CLI agent integration for AI to let you collaborate with Claude Code or Codex CLI, etc. You can deploy straight to https://RTEdge.net

The playground has HTML I ↔ O iframe with mostly reload-free 2-way IO sync, built-in service/edge workers with URL imports of ESM, and a whole lot more. You can see some examples under Code > New…

Here is a recent one for accessible multi-OS keyboard shortcuts: https://kbd.rt.ht/?io