Signal · 3
Articles worth keeping
Things I found useful and never want to lose — each with a note on why it mattered or how I used it. Pinned items stay on top.
Anthropic's field guide to building effective agents
The patterns behind my command center's agent loop — when a simple prompt chain beats an autonomous agent, and why simpler usually wins. Directly shaped how I dispatch headless runs.
Anthropic's prompt caching: automatic breakpoints, lookback quirks, pre-warming
Worth keeping as a reference for actually tuning cache hit rates instead of guessing. Key things I'd forget otherwise: the lookback window is only 20 blocks, cache writes happen ONLY at the breakpoint, and a max_tokens:0 pre-warm kills first-token latency. Pricing: 5m writes 1.25x, 1h writes 2x, reads 0.1x base (0.05x on Opus 5.5 and 0.025x on Fable 5.1 as of September 2026). Also the table of what invalidates cache: tool defs invalidate everything; images/tool_choice only messages.
Why typed content collections make a site you can grow for years
The typed-markdown backbone this whole site runs on — one file per entry, a schema catching mistakes at build time. It's the reason adding a post or a pinned link is a 30-second edit, not a code change.