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David Crawshaw

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The agent principal-agent problem The agent principal-agent problem 2026-05-07 Code review is broken. The industry-established code...
7th May 2026
2

The agent principal-agent problem

from David Crawshaw [alt+shift+b] in programming

7th May 2026
The agent principal-agent problem 2026-05-07 Code review is broken. The industry-established code review process, review-then-commit, was a straightforward mechanism that allowed a relatively low-trust group of engineers to collaborate. It appears to have been initially developed...
I am building a cloud I am building a cloud 2026-04-22 Today is fundraising . As is the nature of writing for a larger...
22nd Apr 2026
1

I am building a cloud

from David Crawshaw [alt+shift+b] in programming

22nd Apr 2026
I am building a cloud 2026-04-22 Today is fundraising . As is the nature of writing for a larger audience, it is a formal, safe announcement. As it should be. Writing must necessarily become impersonal at scale. But I would like to write something personal about why I am doing...
Eight more months of agents Eight more months of agents 2026-02-08 I wrote up my experiences programming with LLMs , and updated...
8th Feb 2026
1

Eight more months of agents

from David Crawshaw [alt+shift+b] in programming

8th Feb 2026
Eight more months of agents 2026-02-08 I wrote up my experiences programming with LLMs , and updated it for the world of agents . A lot has changed since then, so here is an update.a bit over a year agoeight months ago We were prototyping our first agent, Sketch, when Claude Code...
How I program with Agents How I program with Agents 2025-06-08 This is the second part of my ongoing self-education in how to...
8th Jun 2025
1

How I program with Agents

from David Crawshaw [alt+shift+b] in programming

8th Jun 2025
How I program with Agents 2025-06-08 This is the second part of my ongoing self-education in how to adapt my programming experience to a world with computers that talk. The first part, , covered ways LLMs can be adapted into our existing tools (basically, autocomplete) and how...
How I program with LLMs How I program with LLMs 2025-01-06 This document is a summary of my personal experiences using...
6th Jan 2025
49

How I program with LLMs

from David Crawshaw [alt+shift+b] in programming

6th Jan 2025
How I program with LLMs 2025-01-06 This document is a summary of my personal experiences using generative models while programming over the past year. It has not been a passive process. I have intentionally sought ways to use LLMs while programming to learn about them. The result...
jsonfile: a quick hack for tinkering jsonfile: a quick hack for tinkering Consider your requirements! A reference implementation A final...
6th Feb 2024
41

jsonfile: a quick hack for tinkering

from David Crawshaw [alt+shift+b] in programming

6th Feb 2024
jsonfile: a quick hack for tinkering Consider your requirements! A reference implementation A final thought 2024-02-06 The year is 2024. I am on vacation and dream up a couple of toy programs I would like to build. It has been a few years since I built a standalone toy, I have...
new year, same plan new year, same plan 2022-12-31 Some months ago, the bill from GCE for hosting this blog jumped from...
31st Dec 2022
41

new year, same plan

from David Crawshaw [alt+shift+b] in programming

31st Dec 2022
new year, same plan 2022-12-31 Some months ago, the bill from GCE for hosting this blog jumped from nearly nothing to far too much for what it is, so I moved provider and needed to write a blog post to test it all. I could have figured out why my current provider hiked the price....
log4j: between a rock and a hard place log4j: between a rock and a hard place 2021-12-11 What does backwards compatibility mean to...
11th Dec 2021
52

log4j: between a rock and a hard place

from David Crawshaw [alt+shift+b] in programming

11th Dec 2021
log4j: between a rock and a hard place 2021-12-11 What does backwards compatibility mean to me? Backwards compatibility should not have forced log4j to keep LDAP/JNDI URLs The other side of compatibility: being cautious adding features There is more than enough written on the...
Software I’m thankful for Software I’m thankful for 2021-11-25 A few of the things that come to mind, this thanksgiving. Most...
25th Nov 2021
42

Software I’m thankful for

from David Crawshaw [alt+shift+b] in programming

25th Nov 2021
Software I’m thankful for 2021-11-25 A few of the things that come to mind, this thanksgiving. Most Unix-ish APIs, from files to sockets are a bit of a mess today. Endless poorly documented sockopts, unexpected changes in write semantics across FSs and OSes, good luck trying to...
Remembering the LAN Remembering the LAN How it was How it is A dream: How it will be 2020-01-28 A memory and a dream. I...
28th Jan 2020
24

Remembering the LAN

from David Crawshaw [alt+shift+b] in programming

28th Jan 2020
Remembering the LAN How it was How it is A dream: How it will be 2020-01-28 A memory and a dream. I started programming in the 1990s living above my parent's medical practice. We had 15 PCs for the business, and one for me. The standard OS was MS-DOS. The network started off...
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