Samuel Lawrentz · engineer & team lead · 9+ years
I build interfaces,
systems, and teams.
Nine years of shipping pixel-perfect UIs and the systems behind them. I write monthly about the craft - code, tools, and leading engineers.
Opus 5.5, Day One: Four Models, Two Boring Tasks, Sixteen Runs
Claude Opus 5.5 landed and Claude Code silently made it the default. I ran it against Opus 5, Fable 5.1 and Sonnet 5 on the two small tasks I always use, twice each, and counted seconds, dollars, lines and tautological tests. The 40% cheaper claim came out at 55% on my box.
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Writing
All posts- Sep 22, 2026 Google's AX Is kubectl for Agents. Its Four Manifests Are a Checklist for the Rest of Us.
- Sep 21, 2026 Your Claude Code Bill Is 94% Cache Hits. The Rest Is Coffee Breaks.
- Sep 20, 2026 An AI If-Statement You Can Run on a 4-Core VM - Trying Kev
- Sep 19, 2026 Claude Code Reads AGENTS.md Now - Here Is Exactly When It Does
- Sep 18, 2026 Approve Claude Code Permission Prompts From Slack With One Hook
Projects
GitHubkron
Cron, but it actually tells you what happened. Output capture, run history, failure tracking.
clipssh
Send clipboard screenshots to remote SSH hosts.
jira-commit-helper
VSCode extension that puts JIRA ids into commits.
quotes-generator
Browser image quote generator with Unsplash backgrounds.
react-highlight-textbox
Highlight patterns inside a text input in real time.
rc-json-editor
Lightweight, dependency-free JSON editor for React.
pasttenser
A tiny API that returns the past tense of any English verb.