Jason Miller 🦊⚛

Platform DX @Shopify. Created @preactjs.
Do more with less.

[Jason Miller 🦊⚛ @_developit]

Introducing Preact Signals: a reactive state primitive that is fast by default.

✅ feels like using plain values
🥳 automatic updates when values change
⏱ updates DOM directly (fast!)
🥹 no dependencies arrays

https://t.co/p4PIxThcEW

[Jason Miller 🦊⚛ @_developit]

@yoavweiss oh god that's the beginning of the end I think

[Jason Miller 🦊⚛ @_developit]

I just had to type "sorry, wrong agent". 2026 is weird

[tobi lutke @tobi]

Git at Scale (by cursor) has been one of the most interesting blog posts i've read in a while. It came right when I was frustrated with Shopify's internal git system.

As an exercise, I've implemented it over the weekend as open source. It's a single rust binary that you can point at any S3 type object store. It uses WAL and CAS primitives and requires no other data store.

It also implements bundle-uri so large git repos (like our mono) are very fast to download as a chain of static bundles. Also comes with basic familiar UX.

https://t.co/oEnWK3eIL4

[jovi 🐨 @JoviDeC]

Preact, just build your apps with a familiar feeling tech!

If it doesn't work, yell at me!

[Jason Miller 🦊⚛ @_developit]

@TheLarkInn the "sideEffects" config means packages can have their exported interface be a barrel without no performance hit (Vite dissolves re-exports, TS types are generated+cached so no source fan-out). And the packages made it so file moves usually don't change importer specifiers.

[Jason Miller 🦊⚛ @_developit]

@TheLarkInn late reply but: no, not really. the DX win from the performance improvement massively outweighed any familiarity loss.

One thing we did to help was convert a bunch of "pseudo-package dirs" to real pnpm workspace packages with `"sideEffects"` configured.

[Jason Miller 🦊⚛ @_developit]

@TheLarkInn And then the bonus was that doing it as a bundler plugin meant it had to be fast, which forced decisions like doing it all via a Rust lexer (no ast), and those all got reused to build the codemod tool that we then used to stamp the barrels out of the source after.

[Jason Miller 🦊⚛ @_developit]

@TheLarkInn This got us to the end goal fast, but the main value was that it uncovered all of the incredibly nuanced bugs we had when barrel files were removed - module trees shifting between bundles, their exec timing changing, etc.

[SaltyAom @saltyAom]

ast-grep is so good

I know I can trust software maintained by Hatsune Miku

[Jason Miller 🦊⚛ @_developit]

@kanavtwt it's spelled "Jason"

[jovi 🐨 @JoviDeC]

Soon you will be able to roll Preact in vite without Babel https://t.co/PzmpVzTvGs

[jovi 🐨 @JoviDeC]

What if a signal on the server could just be a signal on the client?

Wrote about @_developit's mixed-signals - it reflects server-side Preact Signals to clients over any transport. Write your state once as a model, decide where it runs.

No fetch glue. No cache invalidation. Just signals.

https://t.co/C9SF8ZB3PK

[Jason Miller 🦊⚛ @_developit]

@wesbos lol yeah. though... I'd lay partial blame at the feet of CSS for that specific one haha

[Jason Miller 🦊⚛ @_developit]

Has anyone else noticed mobile frontends (native and web) are getting increasingly terrible (as we descend into UX vibe coding?)?

I keep noticing I've developed ridiculous coping strategies like constantly copying input to clipboard in case it gets lost when sending.

[Jason Miller 🦊⚛ @_developit]

@jbscript or the copyright that tells you what year the LLM training data was collected rather than the date the page was last updated

[Jason Miller 🦊⚛ @_developit]

@QuentinMerabet why test when you can RALPH

[Jason Miller 🦊⚛ @_developit]

@cultheroro @wesbos probably comes from the same vendor on the same boat anyway

[Jason Miller 🦊⚛ @_developit]

@rossmorsali lol maybe that's the shift - I'm using more frontends from the folks building LLM stuff, and that stuff is all rushed

[Jason Miller 🦊⚛ @_developit]

@ryanflorence its been going downhill for sure, but really feels like it's accelerated