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David K 🎹

@DavidKPiano • 94,085 subscribers

Making state machines at @statelyai · I play piano

Shorts

I'm not sure how I feel yet about zip ties in state machine diagrams

I'm not sure how I feel yet about zip ties in state machine diagrams

22,030 views

New "Worst volume control UI" contender has emerged

New "Worst volume control UI" contender has emerged

153,961 views

I'd be really surprised if AI ever "one-shots" something like this using just HTML + CSS

I'd be really surprised if AI ever "one-shots" something like this using just HTML + CSS

193,392 views

Making progress on an open-source library where you author agent logic as state machines in XState and run it *anywhere*: Mastra, Eve, Flue, Vercel AI SDK, Cloudflare Agents, or your own runtime. It’s coming along!

Making progress on an open-source library where you author agent logic as state machines in XState and run it anywhere: Mastra, Eve, Flue, Vercel AI SDK, Cloudflare Agents, or your own runtime. It’s coming along!

30,600 views

XState v5 is finally here 🚀 → Express any logic, from promises to state machines → Much simpler API → Massively improved TypeScript experience → Smaller bundle size, zero deps → Advanced statechart features → New docs, examples++ npm i xstate

XState v5 is finally here 🚀 → Express any logic, from promises to state machines → Much simpler API → Massively improved TypeScript experience → Smaller bundle size, zero deps → Advanced statechart features → New docs, examples++ npm i xstate

158,720 views

Just discovered that you can enable tab-completions for npm commands pretty easily. Wish I did this years ago 🤯 npm completion >> ~/.bashrc npm completion >> ~/.zshrc

Just discovered that you can enable tab-completions for npm commands pretty easily. Wish I did this years ago 🤯 npm completion >> ~/.bashrc npm completion >> ~/.zshrc

90,624 views

Ever wanted to actually *simulate* your Mermaid state diagrams to see if the logic makes sense? Yeah, me too. Just copy-paste it into Stately Sketch and press play. Should I add a Mermaid → Code converter? 🤔

Ever wanted to actually simulate your Mermaid state diagrams to see if the logic makes sense? Yeah, me too. Just copy-paste it into Stately Sketch and press play. Should I add a Mermaid → Code converter? 🤔

27,882 views

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I mixed Jev + an espresso (state) machine. Turns out, Jev's a pretty good barista ☕ Introducing Jevspresso: XState determines what's possible, Jev decides the next move. Order in plain language, or break stuff and watch Jev cope. Try it:

I mixed Jev + an espresso (state) machine. Turns out, Jev's a pretty good barista ☕ Introducing Jevspresso: XState determines what's possible, Jev decides the next move. Order in plain language, or break stuff and watch Jev cope. Try it:

33,395 views • 1 month ago

One underrated benefit of declarative, event-based state management: It turns your app logic into something LLMs can use *directly*. Transitions + schemas become tool calls automatically. The agent doesn’t mutate state; it sends events the app already understands.

One underrated benefit of declarative, event-based state management: It turns your app logic into something LLMs can use directly. Transitions + schemas become tool calls automatically. The agent doesn’t mutate state; it sends events the app already understands.

20,747 views • 5 months ago

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