David WalshSubscribe
Writing

Essays, guides, and tutorials

May 29, 2026

Opus 4.8, Mythos & Glasswing

A new flagship that ships honesty as its headline, a frontier model too dangerous to release, and a coalition quietly finding ten thousand zero-days — what's confirmed, and what's still rumour.

14 min read
May 13, 2026

Agent view, live

Anthropic shipped a real dashboard for parallel Claude Code sessions. I rebuilt it in the browser — scrubbable, keyboard-driven — so you can feel the async-by-default shift in 90 seconds.

9 min read
May 12, 2026

/goal: Claude Code's per-turn condition check

A small fast model reads every turn and decides whether you're done — closing the gap between 'Claude says it's finished' and 'the tests actually pass.'

7 min read
Apr 20, 2026

Claude Design: the first AI design tool that writes to your codebase

Anthropic Labs' new product ingests a brand at the code level, hands off to Claude Code cleanly, and will lock you out for a week if you try to run three clients through it on a Tuesday.

14 min read
Apr 19, 2026

How I wrote The Unseen Alliance with Claude

Fifty chapters drafted in hours instead of the decade it would have taken by hand — and the Claude Code plugin that kept the manuscript from drifting as it scaled.

22 min read
Apr 19, 2026

Stop counting tokens

I spent the early 2000s shaving cycles off inner loops. Twenty years later I watch teams do the same thing with LLM tokens — and miss the actual ROI question.

9 min read
Apr 11, 2026

Architecting for change, not for certainty

Most platforms rot because they were built for a future that never arrived. Here's the heuristic I use to stay loose without going vague.

8 min read
Mar 28, 2026

Shipping at 80%

The quiet discipline of knowing when it's enough, and when it isn't.

6 min read
Mar 14, 2026

It's not a technology problem

Most teams don't have a technology problem — they have a decision-making problem dressed up as one.

5 min read
Feb 22, 2026

A CRUD app in a weekend

The stack I reach for when I need to ship something small, boring, and reliable.

12 min read
Jan 19, 2026

Meetings as an interface design problem

Cadence, agenda, attendees — these are UI choices. Treat them like one.

7 min read