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.
claude plugin eval - Finally a Way to Prove Your Skill Does Anything
Claude Code can now run your plugin or skill against test cases, score the runs, then run the same cases without it and show the delta. I wrote an eval for one of my skills. Here is the file format, and the wall I hit.
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Writing
All posts- Sep 11, 2026 Obsidian in the Terminal - I Pointed emeraldian at My 199-Note Vault
- Sep 10, 2026 Interrogate What You Built Before Calling It Done - I Ran the Prompt on My Own Repo
- Sep 09, 2026 Herdr Raised $6M. Why Would Anyone Fund a Terminal Multiplexer?
- Aug 17, 2026 Lighthouse 41 to 100 - Delete the Cool Thing First
- Aug 01, 2026 Glance - A Self-Hosted Alternative to Claude Artifacts
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.