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Zac Sweers

@zacsweers.dev
1.6K followers 418 following 99 posts

All this happened, more or less Blog: zacsweers.dev 📍NYC

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Zac Sweers @zacsweers.dev · 09/09/2026
Yeah my coach only recommends them on my quality workout days. Long and easy runs are all in normal shoes with good cushion and stability
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Zac Sweers @zacsweers.dev · 08/09/2026
My coach kinda compared it to how PED use works, in that a lot of it is actually about improving athlete recovery rather than purely improving performance. Similarly, this is a big reason swimmers can do so many events: so much less impact on their bodies let them bounce back quick
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Zac Sweers @zacsweers.dev · 08/09/2026
I had a follow up question/comment! Recorded a video, hope it makes sense. Loved the episode as a long time/semi-competitive runner myself. The TL;DR though being they’re def faster in the shoes, but they’re also legit in better shape because they can do higher volume training too
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Zac Sweers @zacsweers.dev · 13/08/2026
MadeByGoogle events continue to be weird influencer-washing and, at best, disingenuous
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Zac Sweers @zacsweers.dev · 31/07/2026
"i'm so edge lol"
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Zac Sweers @zacsweers.dev · 31/07/2026
Is founders not using caps the new faking a vocal fry?
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Zac Sweers @zacsweers.dev · 31/07/2026
Suspend providers have been in the works for months, h/t @jingibus.bsky.social for writing up the original proposal. There's more work here but pretty happy with how this core runtime has shaped up! Please give feedback/ideas/etc on the original MEEP: github.com/ZacSweers/me...
github.com
Proposal: Suspending providers · ZacSweers metro · Discussion #1941
The Proposal Here's the idea: A "suspending provider" may be written as follows: @Provides suspend fun provideDeviceId(@Io ioDispatcher: CoroutineContext): String = withContext(ioDispatcher) { gene...
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Zac Sweers @zacsweers.dev · 31/07/2026
Metro 1.4.0 brings suspend providers! ⚡ github.com/ZacSweers/me...
github.com
Release 1.4.0 · ZacSweers/metro
New Experimental support for suspend providers This release introduces experimental support for suspend providers. This is disabled by default and can be enabled by the metro.enableSuspendProviders...
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Nick Ames @nickames82.bsky.social · 29/07/2026
Enough statements, enough words, enough "careful consideration", enough private disgust. It's time for UEFA and Europe to take action against what FIFA and Infantino are doing to football: www.theguardian.com/football/202...
theguardian.com
Uefa has to show backbone: concrete action can make Fifa’s World Cup plans untenable | Nick Ames
European football has shown an increased willingness to talk tough with Fifa but words can only be wielded so many times
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Zac Sweers @zacsweers.dev · 16/07/2026
@reckless.bsky.social @davidpierce.xyz this week’s episode gonna be lit
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Zac Sweers @zacsweers.dev · 16/07/2026
Circuit 0.35.1 begins removing Parcelable requirements and migrating to AndroidX retain! github.com/slackhq/circ...
github.com
Release 0.35.1 · slackhq/circuit
New Pluggable Screen/PopResult persistence with CircuitSaver Circuit's saveable back stacks no longer mandate how Screens and PopResults are persisted. A new CircuitSaver abstraction in circuit-run...
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Zac Sweers @zacsweers.dev · 08/07/2026
First day at OpenAI!
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Zac Sweers @zacsweers.dev · 06/07/2026
Also handy for testing your library against R8/minification conditions. Good if you do some reflection and have proguard rules you ship with your library. Example of doing this (manually) here: github.com/ZacSweers/Mo...
github.com
MoshiX/moshi-ir/moshi-kotlin-tests/build.gradle.kts at main · ZacSweers/MoshiX
Extensions for Moshi including IR plugins, moshi-sealed, and more. - ZacSweers/MoshiX
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Zac Sweers @zacsweers.dev · 06/07/2026
Contributed R8 support to shadow, main benefit is you could produce pretty optimized uber jars now (on top of just tree-shaking). Should be pretty handy for CLIs. github.com/GradleUp/shadow/re...
github.com
Release 9.5.0 · GradleUp/shadow
Added Check DuplicatesStrategy for merging transformers. (#2026) This will log warnings when an incompatible DuplicatesStrategy (e.g., EXCLUDE) is applied in Gradle configuration for built-in Reso...
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Zac Sweers @zacsweers.dev · 02/07/2026
Apologies for the contrast issues on some slides in the video. My slides were black and white, the video processing for some reason gave it a Solarized Light theme
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Zac Sweers @zacsweers.dev · 02/07/2026
My "Metro Under the Hood" talk from KotlinConf is available on YouTube now! Video: youtu.be/KVmogsSbic8 Slides: speakerdeck.com/zacsweers/met...
youtu.be
Metro Under the Hood | Zac Sweers
Recording brought to you by American Express. https://americanexpress.io/kotlin-jobs
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Zac Sweers @zacsweers.dev · 01/07/2026
h/t @rahulrav.com for starting the tracing work!
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Zac Sweers @zacsweers.dev · 01/07/2026
And finally, this release's copilot: Honey! She's a deaf 6-month-old red heeler and chaos incarnate.
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Zac Sweers @zacsweers.dev · 01/07/2026
Plus a bunch of other improvements to diagnostics and the usual laundry list of bug fixes!
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Zac Sweers @zacsweers.dev · 01/07/2026
Runtime tracing is a new integration with the upcoming androidx.tracing 2.0. If enabled, you just pass a Tracer instance into your graph and Metro will generate code that traces binding materialization throughout your graph. This is especially useful for profiling app startup or a CUJ.
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Zac Sweers @zacsweers.dev · 01/07/2026
Rich diagnostics is something I've wanted to work on for a while and takes a lot of inspiration from Rust. Same focus on detail and bouncing you in the right direction, but now with markup and diagrams! This works safely in the IDE as well, where IDE builds will gracefully fall back to plain ascii.
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Zac Sweers @zacsweers.dev · 01/07/2026
Metro 1.3.0 has rich diagnostics and experimental runtime tracing! github.com/ZacSweers/metro/re...
github.com
Release 1.3.0 · ZacSweers/metro
New [IR] Revamp graph-validation diagnostics with structured output. Taking some inspiration from Rust error messages. Stable diagnostic IDs Compact dependency chains Aligned binding traces...
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Zac Sweers @zacsweers.dev · 29/06/2026
How to Take an 11 Month Sabbatical www.zacsweers.dev/how-to-take-...
zacsweers.dev
How to Take an 11 Month Sabbatical
A sequel to the last one, but a bit longer. On Leaving Slack After nearly 6 years, I left Slack in August of 2025. It was for a combination of reasons that added up to "it's time". The biggest rea...
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Zac Sweers @zacsweers.dev · 24/06/2026
Coming in Metro 1.3.0! Was awesome working with Rahul on this
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Zac Sweers @zacsweers.dev · 23/06/2026
Introducing kempt: a single-entry point CLI that delegates to language-specific formatters with easy installation, automatic binary management, git hook integration, license headers, whitespace handling, and simple configuration. www.zacsweers.dev/introducing-...
zacsweers.dev
Introducing Kempt
Formatting should be boring, in the best possible way.
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Zac Sweers @zacsweers.dev · 21/06/2026
Amazing!! What a game to get to see
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Zac Sweers @zacsweers.dev · 21/06/2026
Yes every game is effectively a home game for the other team. We were the ones partying in the stadium after
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Zac Sweers @zacsweers.dev · 21/06/2026
So fucking proud of this team 🇨🇼 . One more to go in Philly
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Zac Sweers @zacsweers.dev · 18/06/2026
See bsky.app/profile/zacs...
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Zac Sweers @zacsweers.dev · 18/06/2026
One thing I’m not clear on is the repeated use of the word “unusual”, where it seems to mean anything that exceeds the given (small) limits. By this criteria, any KMP or gradle project is often “unusual” no? Or a maintainer that has more than a couple projects/artifacts
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Zac Sweers @zacsweers.dev · 18/06/2026
It's hard to square "it's not meant to be hard" with what appears to be a lot of signs warding me away from asking for this Some of these questions also don't make sense. What's "publishing pattern"? What if it's multiple projects? If FOSS alone is justification, why not allow me to say that?
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Commonhaus Foundation @commonhaus.org · 17/06/2026
🎉 OkHttp, Okio, Retrofit, and SQLDelight join Commonhaus! www.commonhaus.org/activity/315...
commonhaus.org
🎉 OkHttp, Okio, Retrofit, and SQLDelight join Commonhaus!
OkHttp, Okio, Retrofit, and SQLDelight join Commonhaus under the lysine.dev banner
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Zac Sweers @zacsweers.dev · 17/06/2026
I’m not privy to internals but if I had a magic wand - transparent pricing model, no “contact sales” - transparent (even vaguely) view on infrastructure costs, specifically how publishing relates to that - proactively engaging large groups (companies or ICs with large OSS footprints) re: exemptions
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Zac Sweers @zacsweers.dev · 17/06/2026
It was sarcasm and he was talking about Jesse
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Zac Sweers @zacsweers.dev · 17/06/2026
Your blog post is not really clear on this, and the damage control you’ve been trying to do here and on Reddit since kind of speaks to that I think 😅
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Zac Sweers @zacsweers.dev · 17/06/2026
You do see why those solutions aren’t being warmly received though, right?
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Zac Sweers @zacsweers.dev · 17/06/2026
Your solution has so far been extremely harsh limits, “ask for an exemption”, no upfront pricing, and a sales contact for the rest. I totally get that it’s not a straight line but it does seem like some things could be more proactive and transparent.
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Zac Sweers @zacsweers.dev · 17/06/2026
That chart was included as an explanation in the post so that’s why I point to it being unclear. No one disputes that funding is needed, but if you’re going to point at a chart and also say “1% are responsible for 83% of traffic” in a post, it’s hard not to feel like there’s an elephant in the room?
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Zac Sweers @zacsweers.dev · 17/06/2026
Namely: it’s not clear. One company could be responsible for 90% of the volume with that scaling. Or maybe 100 are. It’s unclear, but there’s a general perception that we’re all paying a tax because of some whales at the end of the
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Zac Sweers @zacsweers.dev · 17/06/2026
Doing things by namespace means everything is under broad grouping. What if a branch is published locally and not pushed, for instance? What if it’s 10 OSS projects and one private SDK? I’m stuck on why this added friction is necessary at all, transparency on the numbers in this chart would help
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Zac Sweers @zacsweers.dev · 17/06/2026
Here’s me with 3 libraries (two very small) on the new limits this month
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Zac Sweers @zacsweers.dev · 17/06/2026
Here’s me after 7 releases of three projects this month
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Zac Sweers @zacsweers.dev · 17/06/2026
But instead they’re squeezing everyone
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Zac Sweers @zacsweers.dev · 17/06/2026
Also charting gore to justify this
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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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Zac Sweers @zacsweers.dev · 15/06/2026
Oh and ~4% of the island's population was in the stadium today. There's around 300k of us total on this little planet between the island and in diaspora. Today was a very special day for all of us.
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Zac Sweers @zacsweers.dev · 15/06/2026
My dad and I are regular listeners. He's born/raised/still lives there and attended all the WC qualifying matches too. If you ever want a connect to learn bout the country's football history (including the dutch players past and present with lineage there and Suriname), I'd love to put you in touch!
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Zac Sweers @zacsweers.dev · 15/06/2026
- after every German goal the second half, Neuer would run over to the ball boy and beckon for a ball. He'd then proceed to juggle it for a bit and throw it around during the celebrations before tossing the ball back. Is this a thing? - German team came and applauded us at the end too, class move
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Zac Sweers @zacsweers.dev · 15/06/2026
Was in the Curaçao supporters' section and have some fond stories to share! - Match was essentially a home game for Germany. More Mexican kits in the stadium than curacao - That equalizer was unforgettable. Watch the replay with stadium sound and hear the roar despite the numbers difference.
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Brandon Friedman @brandonfriedman.bsky.social · 11/06/2026
Best thing about Mamdani is that he's one of the only Democrats who understands you can just do things
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