I Built a Pure-Zsh Prompt Engine That Renders in 0.6ms (Without Rust or C++)
For years, developers optimizing their shell prompts have faced a binary dilemma: Starship : Beautiful, portable, and feature-packed, but written in…
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67 Lines of Bash That Won't Let an LLM Say Done: A Stop Hook That Reads the Transcript JSONL
Back when I was a student pulling in ¥100k a month, I thought delegating work came down to three things: ask politely, check in on progress, trust t…
I Was Burning $1.20 a Night on Nothing: A Claude Code Skill Library That Harvests and Curates Itself
Going from ¥100k/month as a student to ¥1.2M/month wasn't a matter of working harder. It was a matter of building an environment that keeps running…
Creating my own shell for unix
Building Astra: A Modern Shell in Rust I've been working on a personal project called Astra , an interactive shell written in Rust. The goal isn't t…
When Claude Detects "Why Isn't This Fixed Yet?" and Repairs Its Own CLAUDE.md: A Self-Improvement Loop Driven by Frustration Signals in Transcripts
In a previous post , I extracted skill usage stats from my conversation logs. This time I'm going the other way: a weekly loop that reads the transc…
Don't Make the Agent Re-Run the Test Suite to Find the Failure
Here is a small failure mode that cost me time for longer than it should have. The agent would run the test suite. Tests would fail. The agent would…