Matt McKenna

#Android GDE @tryramp • Public Speaker • Community Enthusiast

[Matt McKenna @mttmcknn]

I am extremely excited to announce that I have been recognized as a @GoogleDevExpert for Android! 🥳

Thank you to everyone who has been a part of my #Android journey so far!

[Rikin @RikinPatel13]

We launched https://t.co/0KJOrjIfNo today! 🎉

For three years, I’ve wanted a place for Ramp designers to share their work and personality, and for y'all to get to know us.

So @lalizlabeth, @baothiento, Nicholas Ano, @PaulJun_, @viktorhofte, @pontusab, and I built one!

Just V1, more coming soon 😎

[Matt McKenna @mttmcknn]

Thanks to everyone who tried it, reported issues, contributed fixes, or shared! 💚

https://t.co/ic8MvPP2BN

[Matt McKenna @mttmcknn]

Life’s been busy lately, and I finally found some time today to get caught up on dejavu!

Dejavu turns Compose recomposition counts into test assertions, so you can catch regressions and protect the improvements you’ve already made.

Here’s what’s new:

[Matt McKenna @mttmcknn]

• Expanded test coverage: keyed SideEffect, changing remember keys, nested movable content, and newer Compose test APIs.

• Platform fixes and validation: Android, JVM desktop, iOS, and Wasm!

[Matt McKenna @mttmcknn]

@RikinPatel13 @tryramp team's cookin 🔥

[Matt McKenna @mttmcknn]

@chrisbanes I've been wanting to try it out, but codex has been so nice especially with remote connections.

I'll give it a shot now! Any recommended plugins?

[Veeral Patel @vral]

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Get an API key today at https://t.co/2Q7TP4U0b7

[Matt McKenna @mttmcknn]

After 4.5 rewarding years at Square, my time there came to an unexpected end. It’s a transition that feels all too familiar right now, but it cleared the path for an amazing new opportunity.

I'm excited to start my next chapter at Ramp!

[Matt McKenna @mttmcknn]

Side note: Jules gets very annoying very fast by reporting duplicate PRs all the time...

[Matt McKenna @mttmcknn]

Finally working on cleaning up PRs for dejavu, including working on Compose 1.11 support.

https://t.co/mHAhgcoGOh

[Jorge Castillo @JorgeCastilloPr]

Dejavu is a library to test recomposition count and track recompositon regressions.

Very convenient 💯

[Chris Banes @chrisbanes]

Hunting down Jetpack Compose recomposition issues manually is a huge time sink

I’ve spent the past few weeks using @himattm's Dejavu to simplify this:

- Write Dejavu tests to establish a baseline
- Tell the agent to hunt for issues and A/B fixes
- Profit

[Matt McKenna @mttmcknn]

Dejavu is KMP, so the skills work across Android, JVM Desktop, iOS, and WasmJs. They cross-reference each other so the agent moves between them on its own.

Try it on a composable that's been bugging you.

Repo: https://t.co/O7KOj0HsGp
Docs: https://t.co/9eKIgqWAcs

[Matt McKenna @mttmcknn]

I built Dejavu because agents don't feel extra recompositions. They write Compose code that compiles and passes its tests while the UI quietly does ten times the work. Dejavu turns that hidden work into a failing test, giving the agent a count to optimize against.

[Matt McKenna @mttmcknn]

Two lines in any Claude Code session:

/plugin marketplace add himattm/dejavu
/plugin install dejavu@dejavu

[droidcon USA @droidconUSA]

Two voices, one stage! Join @himattm & Sam Greenberg at #dcnyc24 📢

Discover how to ensure your #Android app is accessible for users with visual impairments – practical strategies, diagnose issues, & leverage Android’s built-in tools.

https://t.co/djgfGbNlxk