CodePrepped

Anthropic engineer: “Anthropic hired me at $350K–$950K because I know how to build harnesses. 99% of people still hand-roll multi-agent systems and wonder why they break. I build systems that run loops + sandbox tools + turn yesterday’s logs into new skills — same model, 10x more reliable agents that keep improving overnight.” Opus 5.5 → Agents → Harness → Loops → Graphs In a short workshop, he shows exactly how to build one from scratch. step 1 → harness handles loops, context, and sandboxing step 2 → brain and hands separated — 60% faster to first token step 3 → runs server-side, resumes from the log after crashes step 4 → failure is cheap — retry and replay instead of starting over step 5 → yesterday’s logs become new memory — the system wakes up smarter Anthropic calls this “dreaming”. Most people spend weeks building this by hand. You don’t have to. Bookmark and watch it. Then read the full Opus 5.5 harness engineering guide below ↓