Hacker News: tlarkworthy

New comment by tlarkworthy in "RISC-V Linux BusyBox Single Board Notebook"

tlarkworthy — Thu, 09 Apr 2026 05:15:47 +0000

OK fixed! As you clearly know this space well, what do think would make this project better? I was thinking I wanted to see a heatmap of memory access (pages?), and more detailed explaination of the opcodes, but getting the thing working took quite a while so I got a bit tired and stopped at the booting milestone, but I like the project a lot and now it is in a notebook I can basically probe any part of the system with dataviz tools to make it more tangible. Do you have anything you think would be helpful or cool for learners that you have not seen before in an emulator?

New comment by tlarkworthy in "RISC-V Linux BusyBox Single Board Notebook"

tlarkworthy — Wed, 08 Apr 2026 20:50:30 +0000

I just like the game Risk. It boots!

New comment by tlarkworthy in "RISC-V Linux BusyBox Single Board Notebook"

tlarkworthy — Mon, 06 Apr 2026 15:22:29 +0000

This is an app, the file works from a file:// domain without a local Webserver. It's a different thing than other things you have seen.

New comment by tlarkworthy in "RISC-V Linux BusyBox Single Board Notebook"

tlarkworthy — Mon, 06 Apr 2026 11:10:24 +0000

Evergreens only. Yes it's a whole OS in there, 7mb.

RISC-V Linux BusyBox Single Board Notebook

tlarkworthy — Mon, 06 Apr 2026 09:14:47 +0000

Article URL: https://tomlarkworthy.github.io/lopebooks/notebooks/@tomlarkworthy_linux-sbc.html

Comments URL: https://news.ycombinator.com/item?id=47658554

Points: 2

# Comments: 10

New comment by tlarkworthy in "Show HN: GitAgent – An open standard that turns any Git repo into an AI agent"

tlarkworthy — Sat, 14 Mar 2026 17:00:24 +0000

We do something similar at work, called metadev. It sits above all repos and git submodules othe repos in, and works with multiple changes with multiple sessions with worktrees, and stores long term knowledge in /learnings. Our trick has been to put domain specific prompts in the submodules, and developer process in metadev. Because of the way Claude hierarchically includes context, the top repo is not polluted with too much domain specifics.

Realistic Benchmarks for Financial AI

tlarkworthy — Sat, 14 Mar 2026 15:56:42 +0000

Article URL: https://labs.taktile.com/benchmarks

Comments URL: https://news.ycombinator.com/item?id=47377932

Points: 1

# Comments: 0

New comment by tlarkworthy in "The Gay Tech Mafia"

tlarkworthy — Fri, 20 Feb 2026 17:08:34 +0000

Two husbands without kids, working in tech, have a huge amount of cash, time capacity and ideation opportunity. I felt these added up to a huge advantage for getting quality shit done and taking risks. Fair play.

Show HN: The Lopecode Tour

tlarkworthy — Thu, 19 Feb 2026 15:10:10 +0000

Article URL: https://tomlarkworthy.github.io/lopecode/notebooks/@tomlarkworthy_lopecode-tour.html

Comments URL: https://news.ycombinator.com/item?id=47074609

Points: 1

# Comments: 0

New comment by tlarkworthy in "France dumps Zoom and Teams as Europe seeks digital autonomy from the US"

tlarkworthy — Tue, 03 Feb 2026 22:44:57 +0000

It makes you download it but then a button appears saying join in browser. I have tons of zoom binary copies

New comment by tlarkworthy in "The browser is the sandbox"

tlarkworthy — Mon, 26 Jan 2026 09:05:19 +0000

I have a pretty good one here https://observablehq.com/@tomlarkworthy/robocoop-2 and I have a port of opencode in-progress

New comment by tlarkworthy in "LLM Structured Outputs Handbook"

tlarkworthy — Sat, 17 Jan 2026 14:17:20 +0000

Yeah, this upsert_cell tool does it

https://observablehq.com/@tomlarkworthy/forking-agent#upsert...

format: { type: "grammar", syntax: "regex", definition: cellsRegex },

Where cellRegex is

cellsRegex = { const CELL_OPEN = String.raw`\s`;

  const INPUTS_BLOCK = String.raw`.*<\/inputs>\s*`;

  const CODE_BLOCK = String.raw`\s*<\/code>\s*`;

  const CELL_CLOSE = String.raw`<\/cell>`;

  return "^(" + CELL_OPEN + INPUTS_BLOCK + CODE_BLOCK + CELL_CLOSE + ")*$";

}And the extraction logic is here https://observablehq.com/@tomlarkworthy/robocoop-2#process function process(content) { const doc = domParser.parseFromString( "" + content + "", "text/xml" ); const cells = [...doc.querySelectorAll("cell")]; return cells.map((cell) => { const inputsContent = cell.querySelector("inputs")?.textContent || ""; return { inputs: inputsContent.length > 0 ? inputsContent.split(",").map((s) => s.trim()) : [], code: (cell.querySelector("code")?.textContent || "").trim() }; }); }

BTW that agent is under development and not actually that good at programming. Its parent https://observablehq.com/@tomlarkworthy/robocoop-2 is actually very good at notebook programming



New comment by tlarkworthy in "LLM Structured Outputs Handbook"
tlarkworthy — Sat, 17 Jan 2026 00:18:26 +0000

I use regex to force an XML schema and then use a normal XML parser to decode.
XML is better for code, and for code parts in particular I enforce a cdata[[ part so there LLM is pretty free to do anything without escaping.
OpenAI API lets you do regex structured output and it's much better than JSON for code.



New comment by tlarkworthy in "Show HN: 22 GB of Hacker News in SQLite"
tlarkworthy — Wed, 31 Dec 2025 04:28:59 +0000

Parquet/iceberg



New comment by tlarkworthy in "GPT-5.2-Codex"
tlarkworthy — Fri, 19 Dec 2025 05:57:47 +0000

We fixed this at work by instructing it to maximize coverage with minimal tests, which is closer to our coding style.



New comment by tlarkworthy in "Ask HN: How can I get better at using AI for programming?"
tlarkworthy — Sat, 13 Dec 2025 21:23:24 +0000

also after you have a to-and-fro to course correct it on a task, run this self-reflection prompt
https://gist.github.com/a-c-m/f4cead5ca125d2eaad073dfd71efbc...
That will moves stuff that required manually clarifying back into the claude.md (or a useful subset you pick). It does a much better job of authoring claude.md than I do.



Measuring Agents in Production
tlarkworthy — Sun, 07 Dec 2025 21:14:28 +0000

Article URL: https://arxiv.org/abs/2512.04123
Comments URL: https://news.ycombinator.com/item?id=46185219
Points: 1
# Comments: 0



Dynamic Dataflow Templating: the missing semantic for dataflow programming
tlarkworthy — Sun, 07 Dec 2025 20:46:34 +0000

Article URL: https://observablehq.com/@tomlarkworthy/dataflow-templating
Comments URL: https://news.ycombinator.com/item?id=46184990
Points: 1
# Comments: 0



The Resonant Computing Manifesto
tlarkworthy — Sat, 06 Dec 2025 23:36:28 +0000

Article URL: https://resonantcomputing.org/
Comments URL: https://news.ycombinator.com/item?id=46177631
Points: 3
# Comments: 0



Unaggregating Cloud Watch Metrics
tlarkworthy — Sat, 06 Dec 2025 15:56:19 +0000

Article URL: https://tomlarkworthy.github.io/lopebooks/notebooks/@tomlarkworthy_unaggregating-cloudwatch-metrics.html
Comments URL: https://news.ycombinator.com/item?id=46174278
Points: 3
# Comments: 0