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kevmoo

@kevmoo

@google PM for @dart_lang @FlutterDev 💙💛 web tech. https://nitter.cf/t.co/eLakJsLK5K

 Seattle, WA
kevmoo.com/
Joined April 2007
  • Tweets10.3K
  • Following432
  • Followers9.5K
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It's All Widgets! is rebuilt from the ground up 🎉 One home for Flutter: 3,857 apps, 5,041 articles, videos & libraries, 3,305 devs, live streams & podcast. What's new: - Flutter in numbers - "Built with" for OSS apps - Link your Flutter Forum account itsallwidgets.com
Image from It's All Widgets! (@itsallwidgets)
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The naive view of software benchmarking: put your code in a loop, run it N times, and check the mean and std-dev / std-err. There is a LOT more to good benchmarking than mean ± std-err. 🧵
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Published! pkg:bench_press v0.4.2 is now live on pub.dev: pub.dev/packages/bench_press…
The official repository for Dart and Flutter packages.

The official repository for Dart and Flutter packages.

Pub is the package manager for the Dart programming language, containing reusable libraries & packages for Flutter and general Dart programs.

pub.dev
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How was YOUR Friday? github.com/dart-lang/sdk/sec… (I did a tiny part of this, honestly. Random to have your name on such things.) If you haven't heard, google for `ecc "the number 4"`. 😲🤦🤷
TLS MitM vulnerability on Android, Windows, and Linux due to compromised eMudhra intermediate CA...

TLS MitM vulnerability on Android, Windows, and Linux due to compromised eMudhra intermediate CA...

### Summary & Impact In October 2026, eight intermediate Certificate Authority (CA) certificates issued by eMudhra were publicly disclosed as compromised due to weak key generation entropy, ...

github.com
Flutter (@FlutterDev) profile pictureFlutter
@FlutterDevOct 23
Flutter 3.47.8 (stable) & 3.50.0-0.2.pre (beta) are now live. This critical release addresses the eMudhra CA key compromise. If you target Android, Windows, or Linux, run flutter upgrade and rebuild your apps to protect users from potential TLS spoofing. goo.gle/4yDkt0U
TLS MitM vulnerability on Android, Windows, and Linux due to compromised eMudhra intermediate CA...

TLS MitM vulnerability on Android, Windows, and Linux due to compromised eMudhra intermediate CA...

### Summary & Impact In October 2026, eight intermediate Certificate Authority (CA) certificates issued by eMudhra were publicly disclosed as compromised due to weak key generation entropy, ...

github.com
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Stress-Testing Gemini 4 Argon: Building a 3D Flutter Kart Game in 15 Prompts with Zero Assets dev.to/gde/stress-testing-ge… < pretty freakin' cool. I played it too. And there's a good case here for @FlutterDev as the right choice for the game.
Image from Richard Seroter (@rseroter)
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Huge shoutout to data scientist (and good friend) @josemhe, who audited pkg:bench_press & predicted our false-alarm rate within 0.7%! pkg:bench_press now: • Interleaves fresh processes (--processes 5: 41% → 3.4%) • Runs ABBA BAAB rounds • Supports --threshold 0.02
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Folks who bridge deep stats with low-level OS and CPU behavior are rare. Cool to hack with @josemhe on a Saturday morning. Write-up: gist.github.com/kevmoo/b2ec6… Code: github.com/kevmoo/bench_pres… Publishing to pub.dev soon!
pkg:bench_press vs. Benchmarking in Reasonable Time Notebook

pkg:bench_press vs. Benchmarking in Reasonable Time Notebook

pkg:bench_press vs. Benchmarking in Reasonable Time Notebook - 01_bench_press_vs_notebook.md

gist.github.com
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You can now run pkg:build_version and pkg:build_cli in Dart without adding build_runner to your dev_dependencies! With Dart 3.12's `dart run pkg@`, both packages now work in two modes: as standard build_runner builders, or as standalone CLIs.
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In CI, just run `dart run [email protected] --check` inside a normal `Process(dot)run` test. We already migrated dhttpd and deleted its build.yaml file: github.com/kevmoo/dhttpd pub.dev/packages/build_versi… pub.dev/packages/build_cli
GitHub - kevmoo/dhttpd: A simple HTTP server that can serve up any directory, built with Dart.

GitHub - kevmoo/dhttpd: A simple HTTP server that can serve up any directory, built with Dart.

A simple HTTP server that can serve up any directory, built with Dart. - kevmoo/dhttpd

github.com
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Is this dual-mode model useful for your projects? Should we standardize this pattern (`build_runner` + standalone `dart run pkg@` with `--check`) for other standalone code generators in Dart? Curious which tools you'd want to run this way...
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Replying to @GenkitFramework
@GenkitFramework Dart hit 1.0 🎉 I was at @nextappdevcon and updated the plugin right there: Flutter Edge AI now runs on stable Genkit, on-device or hybrid with the cloud. Thanks @chrisraygill, Product lead for Genkit, for the shout-out on stage! 🙏 flutteredge.ai/docs/genkit
Image from Sasha Denisov (@ShuregDenisov)
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Did you know `final class` in Dart is really just base + interface combined? Or why "base mixin class" is valid, while "interface mixin class" is a compile error? Reading the docs never stuck. The trick: having my agent /quiz-me through this concept graph, 1 node at a time.
/quiz-me prerequisite graph for Dart 3 class modifiers showing 8 nodes across Mastered (green), Ready Next (orange), and Locked (slate) states.

ALT /quiz-me prerequisite graph for Dart 3 class modifiers showing 8 nodes across Mastered (green), Ready Next (orange), and Locked (slate) states.

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Want to try it yourself? Here's the prompt I used with /quiz-me in a Gist: gist.github.com/kevmoo/dac5a… skills.sh/kevmoo/kevmoo_skil…
Learn Dart 3 Class Modifiers with /quiz-me

Learn Dart 3 Class Modifiers with /quiz-me

Learn Dart 3 Class Modifiers with /quiz-me. GitHub Gist: instantly share code, notes, and snippets.

gist.github.com
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I struggle with carefully reviewing long/complicated content. I've realized my coding agent can be very helpful. The result: /slice-and-dice (SND) & /quiz-me Use SND to review 20 slides, a design doc, PR, etc. Drill in on sections & accept/reject feedback as you go.
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/quiz-me is amazing if you really want to UNDERSTAND something with (agent-enforced) Socratic questioning. I used it to deeply understand a nuanced Dart language feature that I only kinda understood. Great for specs, PRs, new codebases, etc.
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Give them a spin! File issues or suggestions on GitHub, and reply below with your success stories. skills.sh/kevmoo/kevmoo_skil… skills.sh/kevmoo/kevmoo_skil… github.com/kevmoo/kevmoo_ski…
slice-and-dice — kevmoo/kevmoo_skills

slice-and-dice — kevmoo/kevmoo_skills

Walks through multi-part documents, proposals, technical audits, issue backlogs, or codebases in bite-sized (~60-second) slices ([SND 1/N] .. [SND N/N]) with a…

skills.sh
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Genkit Dart 1.0 is here! 🚀 Build production-ready, full-stack agentic apps with Dart and Flutter: • One API for Gemini, Claude, OpenAI & more • Strongly-typed structured outputs in Dart • Built-in tool calling, streaming & workflows Read the announcement blog 👇 flutter.dev/blog/announcing-…
Announcing Genkit Dart 1.0: Build production-ready agentic apps with Dart and Flutter

Announcing Genkit Dart 1.0: Build production-ready agentic apps with Dart and Flutter

Announcing the stable 1.0 release of Genkit Dart, an open-source framework for building AI-powered features and agentic workflows with Dart and Flutter.

flutter.dev
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