@rtfeldman

Let’s go with the ambitious approach.

 Philadelphia, PA
manning.com/books/elm-in-action?utm_source=elm_in_action&utm_medium=affiliate&utm_campai
Joined September 2008
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  • Followers17.2K
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Richard Feldman retweeted
Kelly Shortridge@swagitda_Oct 21
hey internet, this is really important --> #php2shell gives attackers remote code execution on PHP servers pre-authentication, and @fastly has seen active attack activity. Here is what you need to know now: fastly.com/blog/fastlys-proa…

Fastly’s Proactive Protection for PHP2Shell, Critical React RCE CVE-2026-109618 and CVE-2026-109619...

Learn about Fastly’s proactive protection and virtual patching for the critical php2shell vulnerabilities (CVE-2026-109618 and CVE-2026-109619). Read our deep dive.

fastly.com
The PHP Foundation@ThePHPFOct 20
The PHP security team is giving advance notice: Upcoming security release Wed, Oct 21st 2026, 14:00UTC, two critical vulnerabilities, both rated CVSSv4 9.2. PHP users are encouraged to prepare to update. Earlier release if details become public or active exploit evidence.
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Now available for ACM Members: "Programming Language Fundamentals: A Metalanguage Approach in Elm," by Martin Erwig. For undergraduate students in CS, as well as researchers and practitioners working with programming languages. This book is an intro... share.percipio.com/cd/0FLnCh…
Programming Language Fundamentals: A Metalanguage Approach in Elm book cover

ALT Programming Language Fundamentals: A Metalanguage Approach in Elm book cover

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Richard Feldman retweeted
Ꮍᴀᴇʟ@elle91Oct 16
Me: "Don't you dare" sounds perfectly normal but "do not you dare" sounds ridiculous which is insane because "don't" is a contraction for "do not." Doctor: I meant is anything bothering you physically
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This is one of the dependency philosophies I covered in this talk, and I think more teams should do it! When I was onstage, I asked how many people in the audience do this, and only one person raised their hand: Andrew Kelley, creator of @ziglang. youtu.be/E82ly38YEEQ?si=CmGb…

Dependency Cultures - Richard Feldman | SSW 2026

Abstract: Some software depends on no third-party code. Some depend...

youtube.com
Mitchell Hashimoto
@mitchellhOct 15
Replying to @r00tdaemon
Absolutely. Smaller dependencies are better than ever, and I stand by that most vulnerabilities come from upgrading, not stagnating.
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Richard Feldman retweeted
Hillel
@hillelogramOct 14
BTW I live in NYC now. A lot less time flexible now than I was two years ago what with having a full time job and all, but lemme know if you wanna meet and get coffee or something!
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Do I know anyone who's in NYC and/or at the AIE conference his week?
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Richard Feldman retweeted
Wouter van Oortmerssen@wvoOct 7
There is no heap, no malloc, no GC, no reference counting, no destructors. Every value lives on a (address space reserved) data stack the compiler statically assigns. Growing is a pointer bump. Freeing a deeply nested tree is one store when its scope ends. 2/
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Richard Feldman retweeted
Soren Larson
@hypersorenOct 6
Replying to @hypersoren @zeddotdev
i am hooked on delta omg group chat with humans and agents on development threads is so fun!!
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Richard Feldman retweeted
Zed
@zeddotdevOct 6
Run a few agents in parallel, and the filesystem starts to fill up. Branch names accumulate. Somewhere in there are changes you're fairly sure mattered... to someone. @conradirwin on escaping the tyranny of Git worktrees: delta.dev/blog/escaping-the-…

Escaping the tyranny of worktrees — Delta Blog

Parallel agent work has outgrown Git worktrees.

delta.dev
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Richard Feldman retweeted
Elm@elmlangOct 5
More progress on the road to Elm 1.0! See the rough roadmap here: elm-lang.org/news/another-st… We have a few patch releases lined up, and then we can get to the more exciting improvements that are enabled by having end-to-end types with Acadia databases!
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Richard Feldman retweeted
Evan Czaplicki@evanczOct 5
Elm 0.19.3 is out today! ✨ elm-lang.org/news/another-st… ✨ Explains the rough roadmap for the next few releases. We are preparing for some exciting improvements and features! 😊
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What an interview! This is an eloquent and candid experience report (plus tech demo) from @roc_lang's most prolific production user. Niclas has been getting paid to use Roc in production for 2 years (!) even though it's not (quite) at version 0.1.0 yet. youtu.be/12yVcgQHAK0?si=z2iD…

What makes Roc my forever language (w/ Niclas Åhdén)

Niclas is working on Joy, a framework for building full-stack web a...

youtube.com
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Do I know any programmers currently living in Japan?
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Richard Feldman retweeted
Hillel
@hillelogramSep 28
The same thing with happen with AI video as happened with AI writing and AI art. As soon as we're oversaturated on a style, it becomes gauche. We want to see novelty, we want to see style, and above all we want to see craft.
Tzvetan Mikov
@tmikovSep 28
Opus 5.5 can generate great videos. Everyone is doing it. I wonder how long before all of these videos become worthless, now that they are so cheap. I mean, I watched the first two and now I am done. I guess part of the value for me always was the implied human effort.
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Richard Feldman retweeted
Danilo Leal@daniloblealSep 27
in Delta (delta.dev), you can easily learn about the product from the product. if you're unsure whether we already support something you're missing, just @-mention delta at any time and you'll get the answer right away, without even having to visit the docs :)
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Richard Feldman retweeted
Lisbon AI
@lisbonai_Sep 24
Post-Git Agentic Collaboration Yes, we did Multiplayer AI live with Lukas Wirth (@zeddotdev)
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My keynote from FUNARCH 2026 is up! "Functional Mechanical Sympathy" youtu.be/jSHmDnUZCm8?si=9Z_0…

[FUNARCH'26] Functional Mechanical Sympathy (Keynote)

Functional Mechanical Sympathy (Keynote) (Video, FUNARCH 2026)Rich...

youtube.com
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Richard Feldman retweeted
Danilo Leal@daniloblealSep 22
curious if someone from @NotionHQ here could share a bit about the heuristic to notify someone that's been @-mentioned on a document. when does the app know it's time to fire-off the email/app notification pipeline?
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Richard Feldman retweeted
DataApiary
@DataApiarySep 21
Replying to @rtfeldman @cmuratori
Really enjoyed the talk. I watched Casey's OOPs talk at the time. This provided a lively additional followup. Making my way through the video links in the YT description.
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