4 min read
What a Claude Max Window Is Worth in API Dollars
On Max 5x, a 5-hour window held about $155 of API-equivalent usage and a week about $2,000. Six months of my Claude Code logs came to $35,757 at API prices, for about £700 in fees. What fills a window is context, not output.
9 min read
The Agent Stopped, the Loop Kept Going
My agent loop told the agent to stop and ask me when a decision was mine to make. That stopped the agent, not the loop, which would run the same task again. Stopping needs a mechanism the loop checks, not an instruction.
5 min read
What My Coding Agent Config Costs on Every Call
I replicated Berkeley's HarnessTax study on 540 Terminal-Bench runs: the harness tax holds. Then I measured what my own CLAUDE.md, skills and rules add: up to 1.67× the cost, with no gain in success on two of three harnesses.
5 min read
Writing to a Vault While Nobody Is Watching
Obsidian doesn't update themes on its own, so I wrote a plugin that does it at startup, with nobody watching. Obsidian's own installer isn't safe to run that way, so the plugin writes the files itself, by four rules.
4 min read
How I Check Every Screen of My Obsidian Theme
Before each release, my Obsidian theme gets a contrast audit of 414 screens in dark and light mode, on desktop, phone and tablet. What it catches that a colour check misses, and how 22 other themes did on the same audit.
5 min read
What Stops Claude Code Burning Your Usage Window
Claude Code's limits, CLAUDE.md rules, monitors, wind-down plugins, hard holds and my own guard, sorted by when they act. Then my numbers, lockouts included.
8 min read
How I Capture Every Thought with a Ring
Six weeks with the Pebble Index 01: 129 voice notes straight into my Obsidian daily note, and a self-hosted AI agent I can ask from my finger.
