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

• 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!

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

• Dejavu 0.4.0: support for Compose Multiplatform 1.11. • Dejavu 0.5.0: support for Compose Multiplatform 1.12, while retaining Android Compose 1.11 compatibility.

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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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Matt McKenna @mmckenna.me · 17/07/2026

I hope droidcon was great! Wish I could have made it this year.

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Reposted by Matt McKenna

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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Matt McKenna @mmckenna.me · 03/07/2026

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

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Reposted by Matt McKenna

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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Reposted by Matt McKenna

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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Matt McKenna @mmckenna.me · 26/05/2026

Thanks for trying it out! Please let me know if you have any feedback 💚

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Reposted by Matt McKenna

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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Reposted by Matt McKenna

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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Matt McKenna @mmckenna.me · 20/05/2026

And we felt the pain of the surrounding code while writing. AI doesn't feel bad code like we do. Eventually that pain would grow to the point where we have to create new solutions or pick better abstractions.

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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 · 03/05/2026

Yea that would be very cool!

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

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: github.com/himattm/dejavu Docs: dejavu.mmckenna.me

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

Two lines in any Claude Code session: /plugin marketplace add himattm/dejavu /plugin install dejavu@dejavu

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

The floor isn't always zero. Some composables legitimately recompose N times when their inputs change, and that count is the right answer. The skill writes the assertion as exactly = N and locks it in. If the count already matches the floor, the cookbook step is skipped.

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

The standout is dejavu-perf-loop. You pick a composable, write a test asserting atMost=10, and run it. You read the failure, choose a cookbook fix, apply it, and rerun. Tighten the bound and keep going until the count matches the floor.

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

Today I shipped four skills, one for each part of the loop: • dejavu-onboarding: adds Dejavu to a project • dejavu-test-writer: authors recomposition tests • dejavu-error-triage: diagnoses failing assertions • dejavu-perf-loop: drives recompositions to their floor

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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 · 30/04/2026

Love this direction! Is the main goal to enable others to make and distribute their own VisualEffect dependencies or to upstream them through contributions?

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

Just a few commands and you're set. The marketplace manifest auto-refreshes at Claude Code startup so you'll get future skills and updates. I'd love to hear how it goes if you try it. github.com/himattm/skills

github.com

GitHub - himattm/skills: My collection of Skills for AI agents.

My collection of Skills for AI agents. Contribute to himattm/skills development by creating an account on GitHub.

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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

It's only day two and I've had so much fun finding thinks for this app so far. play.google.com/store/apps/...

play.google.com

Color Snap - Apps on Google Play

Daily color-matching challenge. Snap photos, build streaks, train your eye.

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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 · 23/04/2026

I also recommend trying Amp as a cli harness. ampcode.com I don't know anything about mistral though and will have to look into it!

ampcode.com

Amp

Amp is a frontier coding agent that lets you wield the full power of leading models.

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Matt McKenna @mmckenna.me · 23/04/2026

I think it matters a lot! Not only for your own use, as others have said. But LLMs learn sloooowly. Humans still have to be in the loop to guide best practices, especially for under explored topics! We only know those by learning them ourselves, so please write about stuff! 💚

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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 · 22/04/2026

Here's the docs on that halogen.mmckenna.me/latest/custo...

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