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.
Your Claude Code Bill Is 94% Cache Hits. The Rest Is Coffee Breaks.
I parsed a month of my own Claude Code transcripts to see where the prompt cache actually misses. 1448 requests, 17 misses, and 16 of them were me walking away for more than an hour. Here is what a cold turn costs and the short list of things that cause one.
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Writing
All posts- 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
- Sep 17, 2026 BrowserSkill - Let the Agent Borrow a Tab Instead of Stealing Your Cookies
- Sep 16, 2026 I Put 'Do Not Overengineer' in CLAUDE.md and Measured What It Does
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.