Sean T. Allen
@seantallen.bsky.social
📤 68
📥 14
📝 39
https://www.seantallen.com/
I ended up getting stuck at LGA overnight so hey, lucky you, you get a 2nd blog post!
www.seantallen.com/posts/go-slo...
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Go Slow to Go Fast
A reminder.
https://www.seantallen.com/posts/go-slow-to-go-fast/
3 days ago
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All the good chocolates will belong to me.
add a skeleton here at some point
3 days ago
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Hey guess what? My flight home is horribly delayed so you get to benefit bt reading the blog post I just spent an hour "dashing off".
www.seantallen.com/posts/water-...
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Water Is Wet
Breathe.
https://www.seantallen.com/posts/water-is-wet/
3 days ago
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reposted by
Sean T. Allen
Pony
4 days ago
pony-lint: Codifying the Style Guide
www.ponylang.io/blog/2026/05...
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pony-lint: Codifying the Style Guide - Pony
https://www.ponylang.io/blog/2026/05/pony-lint-codifying-the-style-guide/
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Awesomeness.
microsoft.github.io/bocpy/
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boc: Behavior-Oriented Concurrency for Python
The bocpy module provides behavior-oriented concurrency for Python.
https://microsoft.github.io/bocpy/
5 days ago
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reposted by
Sean T. Allen
Pony
6 days ago
Last Week in Pony - Voodoo Child Edition
www.ponylang.io/blog/2026/05...
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Last Week in Pony - May 3, 2026 - Pony
https://www.ponylang.io/blog/2026/05/last-week-in-pony---may-3-2026/
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People who know me well, know that I have this collection of things that you are destined to hear from me. I'm slowly knocking out quick blog posts about them (even if the blog posts didn't necessarily come about very quickly). Here's tonight:
www.seantallen.com/posts/dont-f...
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Don't Fuck It Up
A phrase that became a team motto.
https://www.seantallen.com/posts/dont-fuck-it-up/
9 days ago
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How Do I Know It's Working?
www.seantallen.com/posts/how-do...
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How Do I Know It's Working?
Why I test, even though I don't value tests.
https://www.seantallen.com/posts/how-do-i-know-its-working/
12 days ago
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openai.com/index/why-we...
This is objectively hilarious
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Why SWE-bench Verified no longer measures frontier coding capabilities
SWE-bench Verified is increasingly contaminated and mismeasures frontier coding progress. Our analysis shows flawed tests and training leakage. We recommend SWE-bench Pro.
https://openai.com/index/why-we-no-longer-evaluate-swe-bench-verified/
13 days ago
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reposted by
Sean T. Allen
Pony
14 days ago
Last Week in Pony - Take Me Home edition
www.ponylang.io/blog/2026/04...
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Last Week in Pony - April 26, 2026 - Pony
https://www.ponylang.io/blog/2026/04/last-week-in-pony---april-26-2026/
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reposted by
Sean T. Allen
Pony
14 days ago
pony-lsp: An Actor and a Callback
www.ponylang.io/blog/2026/04...
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pony-lsp: An Actor and a Callback - Pony
https://www.ponylang.io/blog/2026/04/pony-lsp-an-actor-and-a-callback/
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reposted by
Sean T. Allen
Peter Alvaro
15 days ago
When I was at bugbash I felt at home
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Bug Bash had a "holy shit, so many smart people" vibe that was very similar to Ricon.
15 days ago
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A short one for your Friday... "Batteries Are Magic::
www.seantallen.com/posts/batter...
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Batteries Are Magic
On the miracles we no longer find miraculous.
https://www.seantallen.com/posts/batteries-are-magic/
15 days ago
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@palvaro.bsky.social
if you come back out, I'm on the glorious roof outside.
17 days ago
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@palvaro.bsky.social
what day are you arriving? Wednesday night? Thursday morning?
19 days ago
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reposted by
Sean T. Allen
Pony
20 days ago
Last Week in Pony - New York Groove edition
www.ponylang.io/blog/2026/04...
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Last Week in Pony - April 19, 2026 - Pony
https://www.ponylang.io/blog/2026/04/last-week-in-pony---april-19-2026/
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www.seantallen.com/posts/ooda-l...
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The OODA Loop
The OODA loop as a lens for auditing AI agent instruction files.
https://www.seantallen.com/posts/ooda-loop/
23 days ago
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I gave a talk at NYC Systems tonight. It was a blast. First public talk since 2020. For reasons, it wasn't recorded so, here's the slides and a picture of me representing Fort Worth.
www.seantallen.com/talks/gc-mad...
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GC Made Fast
How Pony's actor-based design turns garbage collection from a coordination bottleneck into a local, fast operation.
https://www.seantallen.com/talks/gc-made-fast/
23 days ago
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@palvaro.bsky.social
fair warning... you are getting a big ole hug next week.
23 days ago
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Meet Murdock: The Wildcard in the Ensemble
www.seantallen.com/posts/meet-m...
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Meet Murdock: The Wildcard in the Ensemble
Why every ensemble of fixed-lens personas needs one deliberately unconstrained reviewer.
https://www.seantallen.com/posts/meet-murdock/
24 days ago
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Agentic Personae: Code and Cognition from Spotlights to Identity
www.seantallen.com/posts/agenti...
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Agentic Personae: Code and Cognition from Spotlights to Identity
How small attention focuses became full personas, and why the distinction matters for recurring LLM tasks.
https://www.seantallen.com/posts/agentic-personae/
24 days ago
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An Ensemble of Claudes:
www.seantallen.com/posts/an-ens...
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An Ensemble of Claudes
How an accidental observation about prompt sensitivity led to a structured ensemble method for Claude Code.
https://www.seantallen.com/posts/an-ensemble-of-claudes/
25 days ago
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reposted by
Sean T. Allen
Pony
26 days ago
Embed You a ponyc for Great Good
www.ponylang.io/blog/2026/04...
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Embed You a ponyc for Great Good - Pony
https://www.ponylang.io/blog/2026/04/embed-you-a-ponyc-for-great-good/
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Teaching Claude to Write Pony
www.seantallen.com/posts/teachi...
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Teaching Claude to Write Pony
How I spent two weeks teaching Claude Code to write Pony, and what I learned about mentoring an LLM like a junior engineer.
https://www.seantallen.com/posts/teaching-claude-to-write-pony/
26 days ago
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Parma for Mortals:
www.seantallen.com/posts/parma-...
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Parma for Mortals
A plain-language walkthrough of how Parma protects your containers from the people running them.
https://www.seantallen.com/posts/parma-for-mortals/
27 days ago
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reposted by
Sean T. Allen
Pony
27 days ago
Last Week in Pony - On The Road Again edition
www.ponylang.io/blog/2026/04...
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Last Week in Pony - April 12, 2026 - Pony
https://www.ponylang.io/blog/2026/04/last-week-in-pony---april-12-2026/
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reposted by
Sean T. Allen
Pony
29 days ago
Claude You Some Pony For Great Good:
www.ponylang.io/blog/2026/04...
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Claude You Some Pony for Great Good - Pony
Here’s how it is:
https://www.ponylang.io/blog/2026/04/claude-you-some-pony-for-great-good/
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reposted by
Sean T. Allen
Pony
30 days ago
Pony's Postgres Driver Grows Up
www.ponylang.io/blog/2026/04...
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Pony's Postgres Driver Grows Up - Pony
Pony has had a Postgres driver since 2023. It didn’t do much for most of those three years. That’s been changing over the last couple of months.
https://www.ponylang.io/blog/2026/04/ponys-postgres-driver-grows-up/
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reposted by
Sean T. Allen
Pony
about 2 months ago
Pony gets an Embedded Linker
www.ponylang.io/blog/2026/03...
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Pony Gets an Embedded Linker - Pony
https://www.ponylang.io/blog/2026/03/pony-gets-an-embedded-linker/
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reposted by
Sean T. Allen
Pony
about 2 months ago
Pony Gets a Template Engine
www.ponylang.io/blog/2026/03...
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Pony Gets a Template Engine - Pony
https://www.ponylang.io/blog/2026/03/pony-gets-a-template-engine/
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reposted by
Sean T. Allen
Pony
about 2 months ago
Persistent Data Structures for Concurrent Programs
www.ponylang.io/blog/2026/03...
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Persistent Data Structures for Concurrent Programs - Pony
https://www.ponylang.io/blog/2026/03/persistent-data-structures-for-concurrent-programs/
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reposted by
Sean T. Allen
Pony
about 2 months ago
Pony Get a New JSON Library:
www.ponylang.io/blog/2026/03...
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Pony Gets a New JSON Library - Pony
https://www.ponylang.io/blog/2026/03/pony-gets-a-new-json-library/
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reposted by
Sean T. Allen
Pony
2 months ago
Stallion: An HTTP Server Built Different
www.ponylang.io/blog/2026/03...
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Stallion: An HTTP Server Built Different - Pony
https://www.ponylang.io/blog/2026/03/stallion-an-http-server-built-different/
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reposted by
Sean T. Allen
Pony
2 months ago
Pony Networking, Take Two
www.ponylang.io/blog/2026/03...
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Pony Networking, Take Two - Pony
https://www.ponylang.io/blog/2026/03/pony-networking-take-two/
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Peter Alvaro and Me:
www.seantallen.com/posts/peter-...
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Peter Alvaro and Me
I love it when a plan comes together!
https://www.seantallen.com/posts/peter-alvaro-and-me/
28 days ago
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