iiinova — where your digital self keeps evolving

Reposted by Matt McKenna

Bryan Cantrill @bcantrill.bsky.social · 13/09/2026

The contagion of fear bcantrill.dtrace.org/2026/09/13/t...

bcantrill.dtrace.org

The contagion of fear | The Observation Deck

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Matt McKenna @mmckenna.me · 10/09/2026

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:

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Matt McKenna @mmckenna.me · 03/08/2026

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!

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Sebastian Sellmair @sellmair.dev · 17/07/2026

Something big might happen to the Kotlin Multiplatform Ecosystem 👀 We were never too happy about how Kotlin publishes and resolves KMP libraries. It takes up significantly more space than it has to, produces a ton of artifacts and Maven modules, and is just... complex!

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TJ @tunji.dev · 09/07/2026

Experimenting with something new in the latest Heron release. Heron now let's you download a local inference model to translate text and it works completely offline on your device. Nothing gets sent to any server.

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Zac Sweers @zacsweers.dev · 16/06/2026

Super sympathetic to Sonatype's situation, hosting isn't free. But announcing this with paltry limits and no public pricing options (a sales contact ain't it) is bad for everyone and going to be a major disruption to the JVM and Kotlin ecosystems. central.sonatype.org/publish/mave...

central.sonatype.org

Maven Central Publishing Limits

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Bridget Phillips @jingibus.bsky.social · 03/06/2026

Maybe the most harmful thing about LLMs for a learning community is that you won't learn about anything unrelated to what you asked for.

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Cassidy @cassidoo.co · 27/05/2026

look how they massacred my boy

A google search for "how many ps are in google", and the AI Overview says 2.

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Mark Murphy @commonsware.com · 26/05/2026

Hi! I shipped jetc.dev Newsletter Issue #315! Google I|O 2026! Compose Multiplatform 1.11.0! Android is Compose-first! And... an LLM-powered layout?!? jetc.dev/issues/315 #JetpackCompose #AndroidDev

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Chris Banes @chrisbanes.me · 26/05/2026

Hunting down Jetpack Compose recomposition issues manually is a huge time sink I’ve spent the past few weeks using @mmckenna.me’s Dejavu to simplify this: - Write Dejavu tests to establish a baseline - Tell the agent to hunt for issues and A/B fixes - Profit

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Márton Braun @zsmb.co · 26/05/2026

If you somehow missed the KotlinConf keynote last week, here are the top 10 KMP announcements with links to learn more about each 🧵👇

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Saket Narayan @saket.me · 25/05/2026

Introducing Touch Robot, something that has materially changed how I write screenshot tests. We've been using it at Block for ~2 years to catch animation and gesture bugs that static screenshots miss. saket.me/touch-robot/

saket.me

Introducing Touch Robot, for writing interactive screenshot tests in Compose UI

The best parts of a UI are usually in motion. The bugs are too.

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Reposted by Matt McKenna

Gergely Orosz @gergely.pragmaticengineer.com · 19/05/2026

Situation 1: dev A thinks approach X is correct, dev B thinks Y is the right way. They argue and try to convince each other. Situation 2: dev A thinks approach X is correct, tells the LLM to implement it. There is SO MUCH learning in Situation 1, lost when using LLMs....

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Adam McNeilly @adammc.bsky.social · 17/05/2026

Screaming into the void some thoughts on AI coding. androidessence.com/leave-me-beh...

androidessence.com

Leave Me Behind | Android Essence

Simplified Android Development

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Matt McKenna @mmckenna.me · 30/04/2026

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.

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Reposted by Matt McKenna

Chris Banes @chrisbanes.me · 29/04/2026

💠 Haze 2.0-alpha01 is out! This is a big release, splitting Haze up into layers, with the goal of enabling pluggable visual effects. Let me know what you think! chrisbanes.me/posts/haze-2...

chrisbanes.me

Haze 2.0: A Pluggable Visual Effects Engine

Haze 2.0-alpha01 turns blur into a pluggable effect, splitting it into a separate module and opening the door to custom visual effects built on top of a shared rendering infrastructure.

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Matt McKenna @mmckenna.me · 29/04/2026

Finally got around to bundling the skills I'm using every day into a repo and Claude Code marketplace so anyone can install them. I'm still rebuilding from what I was using daily at work, but we'll get there.

/plugin marketplace add https://github.com/himattm/skills
/plugin install android@himattm
/plugin install review@himattm
/plugin install utilities@himattm

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Matt McKenna @mmckenna.me · 29/04/2026

🎨 Color Snap 2026-04-28 #283D3B Pine 🟢🟢🟢 3/3

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Reposted by Matt McKenna

Zac Sweers @zacsweers.dev · 27/04/2026

Metro reaches 1.0! It's the proudest work of my career and I strongly feel this is how dependency injection in Kotlin should be. Thank you to everyone that's contributed and helped this project get to where it's at. Metro wouldn't be where it is without you. www.zacsweers.dev/metro-is-sta...

zacsweers.dev

🚇 Metro is Stable

Metro 1.0.0 is out now and stable. This means that its runtime APIs (runtime, MetroX artifacts, Gradle plugin, etc.) are now API-stable unless annotated with an experimental annotation. This is an ex...

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Matt McKenna @mmckenna.me · 27/04/2026

Thank you for featuring Halogen!! 🥳

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Reposted by Matt McKenna

Adam McNeilly @adammc.bsky.social · 25/04/2026

Wrote up something small about how I started using interface inheritance to handle inserting into multiple tables at a time in Room, when you have a common type used by multiple Daos and don't want to duplicate code. #AndroidDev androidessence.com/multi-table-...

androidessence.com

Managing Multi Table Inserts With Room | Android Essence

Simplified Android Development

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Matt McKenna @mmckenna.me · 22/04/2026

Hit Claude limits for the first time ever with Opus 4.7 It's somehow equivalent to my last 30 days of Opus 4.6 use. This makes the model not worth using imo.

Claude usage with opus 4.7 equalling 30 days of Opus 4.6 use

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Matt McKenna @mmckenna.me · 20/04/2026

Thank you for featuring Halogen! 🙌

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Reposted by Matt McKenna

Adam McNeilly @adammc.bsky.social · 16/04/2026

Live now! Come hang out for some chill Wednesday night coding twitch.tv/adammc

Reposted by Matt McKenna

Mark Murphy @commonsware.com · 15/04/2026

I finally did it. I finally decided to declare that I am #OpenToWork. See commonsware.com/blog/2026/04... for more!

commonsware.com

#OpenToWork

If you have a problem, if no one else can help, and if you can find him... maybe you can hire... me! 😁

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Reposted by Matt McKenna

Zac Sweers @zacsweers.dev · 15/04/2026

I know there's a lot of people that worked on this behind the scenes but on top of Ralf and Tom, I also wanna give a huge shout out to Joel Wilcox and Jacob Applin for a ton of contributions, pairing sessions over tuple, and starting work with me on Metro as far back as January 2025. Hire them!

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Matt McKenna @mmckenna.me · 14/04/2026

Halogen will support images soon!

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Reposted by Matt McKenna

Mark Murphy @commonsware.com · 07/04/2026

I just released jetc.dev Newsletter Issue #309! Design system rules! Cross-platform haptics! Cross-platform biometrics! Editors! More editors! And... yet more editors?!? jetc.dev/issues/309 #JetpackCompose #AndroidDev

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Matt McKenna @mmckenna.me · 02/04/2026

Unfortunately I missed "April Cools" day, but I've been exploring niche uses of LLMs. I think the "LLM chat box" clearly has it's place, but is so underwhelming as a product addition. So here's a teaser! What if your app's theme could react to app state with no no config?

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Reposted by Matt McKenna

Saket Narayan @saket.me · 02/04/2026

I built a tiny IntelliJ IDEA plugin for something that had been bothering me for years github.com/saket/intell...

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Matt McKenna @mmckenna.me · 23/03/2026

This year at Square we started shipping aggressively. Powered by a completed migration, new feature roadmaps, and AI adoption, we shifted into a build, demo, iterate, ship cycle. My team was showing our work to other engineers all the way up to the C-suite.

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Matt McKenna @mmckenna.me · 23/03/2026

Dejavu is now Kotlin Multiplatform! (v0.3.0) Track and test recomposition regressions on: - Android - Desktop - iOS - WasmJs dejavu.mmckenna.me

dejavu.mmckenna.me

Dejavu

Lock in Compose performance. Catch recomposition regressions before your users.

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Reposted by Matt McKenna

Tor Norbye @tornorbye.bsky.social · 18/03/2026

The IntelliJ documentary is out now: www.youtube.com/watch?v=Kour... And it also covers the origin of Android Studio!

youtube.com

IntelliJ IDEA: The Documentary | An origin story

YouTube video by CultRepo

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Matt McKenna @mmckenna.me · 17/03/2026

Just updated some wording for Dejavu to focus more on UI efficiency rather than performance thanks to some feedback.

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Reposted by Matt McKenna

Mark Murphy @commonsware.com · 17/03/2026

OK, I shipped jetc.dev Newsletter Issue #306! Compose patch and beta releases! Compose Multiplatform alpha release! @mmckenna.me on recomposition testing! @aditlal.dev on recomposition budgets! And... is it time to take action?!? jetc.dev/issues/306 #JetpackCompose #AndroidDev

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Matt McKenna @mmckenna.me · 16/03/2026

Thanks @androidweekly.bsky.social for featuring Dejavu! I just shipped v0.2.0 with CompositionObserver integration. When a recomposition assertion fails, you see exactly which state object caused it, and the value progression. github.com/himattm/dejavu

github.com

GitHub - himattm/dejavu: A lightweight framework for tracking and asserting against Jetpack Compose recompositions.

A lightweight framework for tracking and asserting against Jetpack Compose recompositions. - himattm/dejavu

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Reposted by Matt McKenna

Gergely Orosz @gergely.pragmaticengineer.com · 11/03/2026

When it comes to AI agents / AI tooling + coding, I hear an awful lot of talk about: Efficiency Iteration speed / PR output rate / lines of codes produced I hear zero mentions about: Quality Customer obsession This will bite back, and it probably already is...

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Matt McKenna @mmckenna.me · 11/03/2026

I've been using @zed.dev more and more as I work with AI tools. It's speed is amazing, but I missed the IntelliJ Islands theme. So I made it! Find it in Zed extensions. 😁 github.com/zed-industri...

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Reposted by Matt McKenna

Mark Murphy @commonsware.com · 10/03/2026

I just published jetc.dev Newsletter Issue #305! Compose Multiplatform patch! FlexBox! CameraX! Permissions! ContentScale! @mmckenna.me on testing recomposition counts! NFC! jetc.dev/issues/305 #JetpackCompose #AndroidDev

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Matt McKenna @mmckenna.me · 09/03/2026

Today I’m open-sourcing Dejavu! Testing UI performance in Jetpack Compose is frustrating. We profile and watch tools, yet regressions still creep in. I built Dejavu to make recomposition behavior something you can actually test.

$A screenshot of code that reads: // Create a Recomposition Tracking Rule @get:Rule val composeTestRule = createRecompositionTrackingRule() @Test fun incrementCounter_onlyValueRecomposes() { // Perform an action composeTestRule.onNodeWithTag("inc_button") .performClick() // Assert that Composables change like you expect composeTestRule.onNodeWithTag("counter_value") .assertRecompositions(exactly = 1) // Or assert that they remain stable composeTestRule.onNodeWithTag("counter_title") .assertStable() // asserts recompositions = 0 }$

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Matt McKenna @mmckenna.me · 03/03/2026

Ask anyone who worked at Block/Square what they loved most and I guarantee you the first thing they'll say is "its the people". blog.mmckenna.me/cook-togethe...

blog.mmckenna.me

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Matt McKenna @mmckenna.me · 27/02/2026

I have had too much coffee for the lack of work I need to do today. 😬

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