The first Monday of the new year means... predictions! Thrilled to announce that @simonwillison.net will again be joining @ahl.bsky.social and me for 1- 3- and 6-year predictions. Bring your own predictions and join us today at a special time: 4p Pacific! discord.gg/QrcKGTTPrF?e...

Here's my enormous round-up of everything we learned about LLMs in 2025 - the third in my annual series of reviews of the past twelve months simonwillison.net/2025/Dec/31/... This year it's divided into 26 sections! This is the table of contents:

Bert Hubert over digitale autonomie, w.o. DigiD, Microsoft, de grillen van Trump, enzovoort. Als je een uurtje over hebt, luisteren! Als je dat niet hebt, tijd voor maken en ook luisteren.

It's #SynthV_ASTERIAN 's anniversary of release today! If you have anything to say or anything to share to celebrate ASTERIAN's third anniversary today, we would love if you would take the time to let us know. Thank you for your support of ASTERIAN since 2022!

MSBuild tip: if you're working with binlogs, set the environment variable MSBuildLogPropertyTracking=15. It enables logging of where each property was initially assigned from during evaluation and lights up more features in the binlog viewer.

Oh how I wish Microsoft would hire you (no matter the price) to simply fix shit in windows. Free reign. "Bruce, we don't want to see you, just the commits, fix stuff. We'll pay whatever you want" It'll be beneficial for all.

Some great charts on #AI from the Wall Street Journal. t.ly/xvvbw "AI products would have to create an additional $650 billion a year, indefinitely, to give investors a reasonable 10% annual return. That’s more than 150% of Apple’s yearly revenue"

Trying to measure coding productivity is, and always will be, a fool's errand. Why? Because I can go for a walk then take a shower and have an idea, then write a single line of code that fixes everything I was working on. Immense productivity, but by most metrics I didn't do anything at all.

AI PRs where the author doesn't have an understanding of the system shift the burden of understanding onto the reviewer. So now it's on the reviewer to gain an understanding of this area to either confirm or refute. The author saved time at the expense of the reviewer.

youtu.be/QWi_bvQc4fc?... #dotnet

I am excited for #dotnetconf, I've secured a spot for a talk and will show the best new things in #dotnet test and #mstest. Hope that you join me to see the cool stuff we've been working on throughout the past year. (It is on day 2).

Now that #dotnet code coverage will be coming to #visualstudio professional 2026, is there perhaps also any info on Testcase Impact Analysis ( #TIA) for #azuredevops CI/CD pipelines (as far as I can tell it was never supported for .Net Core?)

New in MSBuild Structured Log Viewer: property trail showing reads and writes during evaluation, in order: github.com/KirillOsenko... If you've ever had ordering issues where someone reads your property before you wrote to it, this is the tool for you.

Looking forward to the Sneak Peak at ARA 3.0 @audiodevcon.bsky.social 2025 Talk conference.audio.dev/session/2025... (Embracing Audio Synthesis) by Stefan Gretscher (Celemony)

Spotify is now running ICE recruitment ads. We asked them to stop. They ignored us. Let's show them what we showed Disney. No Kings, No Collaborators, No Capitulators. indivisible.org/cancel-spotify

TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-... 🧵

Discover the origins of Vox Machina and The Mighty Nein with the Critical Role Comics Collection featuring an absolute stack of titles to read under twin moons! Supports the Critical Role Foundation | https://bit.ly/3WgbMc9

visual studio 2026 insider edition includes code coverage tools in its community edition. bad news for ncrunch and others, but great news for OSS devs. (also, a great way to upsell AI)

SynthV folks - is anybody in the market for a copy of ASTERIAN? i do love him so, but I need to downsize and I'm sure there's someone out there who will make better use of him than I can rn 💫

ALERTA! De regering heeft zonder veel bombarie een internetconsultatie ingediend om de tijd dat je hier moet wonen om Nederlander te worden gigantisch op te rekken. Van 5 naar 10 jaar! Hieronder kan je laten weten wat je vindt van onmenselijk beleid: internetconsultatie.nl/naturalisati...

Wow, @drewnoakes.bsky.social and I have debugged deep into MSBuild just now to bring you this magnificent and horrifying MSBuild behavior: github.com/dotnet/msbui...

Er is geen tijd te verliezen! nerdvote.nl is er om ieder kandidaat-kamerlid te steunen wat zich kan en wil inzetten voor veilige & verantwoorde ICT, en dat we niet onze hele overheid uploaden naar Amerika! Als eerste actie: @barbarakathmann.bsky.social hoger op de GL-PvdA lijst!

My team at Apple is currently hiring for a role that focuses on compiler tools and infrastructure. If you’re interested in this opportunity, please take a look at the job posting here: jobs.apple.com/en-us/detail... #llvm #swiftlang

I'm officially available for consulting! Need C++ expertise for games or software? Could use some profiling and optimization? Want training your employees? Feel free to reach out! And remember, if it's not made in the Champagne region of France, it's only ✨Sparkling Code AB✨!

@simonwillison.net have you seen youtu.be/3pdlTMdo7pY?... yet by any chance? What are you thoughts on it in relation to the current developments (and limitations) in AI/LLMs

Ran into the situation again where updating VS broke incremental builds, because a different compiler version is now being stamped into the embedded PDB, invalidating all caches and resulting in different PE file bytes from identical sources. Glad I invested in the fancy PE parser and differ!

#QQs - I have questions about resumes. (Comment here or on LinkedIn) www.linkedin.com/posts/garret...

Here's the full workshop handout plus annotated slides from "Building software on top of Large Language Models", a three hour tutorial I presented yesterday at PyCon US #PyConUS simonwillison.net/2025/May/15/...

On May 14th, 2021, we made our first step into vocal synthesis. 4 years later, our vocal lineup has expanded to 6, with thousands of users around the world! On today, our 4th anniversary, thank you so much for your support - both now and into the future! eclipsedsounds.com/pages/es-ann...

My heart goes out to anyone who was let go today ❤️ A lay off (or even a performance-based firing) isn’t a statement about you as a person or your character. YOU ARE NOT YOUR WORK. DM‘s are open, happy to chat.

We have an SDE II position on my team. No external link, but if I know you, you can send me your resume.

if you know someone who was impacted, call them. Support them, lend them your network, your references, your referrals, and your time. This is a day with a lot of tears.

There are a lot of incredibly talented people on the job market right now. Many of my friends in DevRel, OSPO, program management, and engineering are looking for their next role, some have been searching for months. If you’re hiring, please consider sharing a link to your open roles below. TY ❤️

New feature in MSBuild Structured Log Viewer: Target Graph! It parses the preprocessed XML and constructs the target graph where edges are BeforeTargets, DependsOnTargets and AfterTargets.

We're excited by this year's summer of code projects! ⛱️🧑‍💻They focus on improving Swift tooling and language interoperability, from VSCode to Java interop. Check them out here: forums.swift.org/t/gsoc-2025-... #GSOC25

This @gamersnexus.bsky.social video is incredible. A beautifully humanized explanation of how tariffs work and their practical implications, doesn't require any knowledge about gaming/PCs or anything. Looking forward to having Steve on Better Offline soon to discuss. www.youtube.com/watch?v=1W_m...

I just realized what causes me the most burnout at work. It's when management doesn't realize how much tech debt I'm paying off and how much I'm helping people and the ecosystem. All they see is that my tasks aren't progressing, so they start tightening the screws and micromanaging.

@simonwillison.net in the past there were <project weekly> blogs that were great to follow the development of a project (but were time consuming to write). How viable would it be to create an llm plugin that retrieves info from a mailman/web archive to help summarize what happened in a certain week?

Very interested to see how cantai turns out based on what it can already do www.kickstarter.com/projects/can...

I blogged on how to update the Emscripten TTY logic to be able to use the FFmpeg WASM console output to calculate the encoding progress. It's all about CR & LF handling again... www.japj.net/2025/04/21/f...

Is there any browser support for playback of multiple audio streams at the same time (in mp4/webm/ogg/etc). VLC/Audacity will only also load/playback one of them. It seems as if this was designed for choosing one audio stream at a time. I want to store each vocal in a separate stream for playback

Managed to get an ffmpeg.wasm stripped down to around 1.5Mb, specifically for only converting audio files (wav/aiff) into multichannel opus for my learning tracks project. Slowly the different pieces of the puzzle fall into place 😀

Spend some time troubleshooting why ffmpeg.wasm wasn’t handling my multichannel wav to opus conversion, big detour (trying to upgrade versions & rebuilding in podman & docker). I finally found an alternative at github.com/wide-video/f... thanks to @widevideo.bsky.social for putting this out there.

The Aspire Compiler medium.com/@davidfowl/t... @davidfowl.com

I just want to pause for a moment and really give thanks for how unbelievably great 'git' is. I think we're all so used to what it does for us, we don't stop to think how bad other version control systems were. Really, I don't know how we'd get as much done without it. #Git

First part about a POC for a Multi-Channel Opus Player for Learning Tracks www.japj.net/2025/03/23/m... I used Claude and GitHub CoPilot in prototyping the concept for encoding the tracks with ffmpeg and the web player. Now spending a bit of time to write about it before continuing next steps.

Thank you for your interest and enthusiasm in trying the new versions of our vocalists. We cannot easily conduct support through social media, so please contact us through our website for individual needs, workflow suggestions, and support. eclipsedsounds.com/pages/contact

Synthesizer V 2 is now available via the Dreamtonics product manager You can trial any of the currently released Synthesizer V 2 voices, as well as the full version of the editor for 14 days. #VocalSynthNews

I’ve been looking into using opus multichannel support for choir learning track browser playback. I ran into an issue where decoding 9 channels did not seem to work out of the box. But with the magic of a wasm ogg-opus-decoder I managed to finally get it working as a proof of concept. Crazy tech