Jev + Opus 5.5: a 10-step architecture for a company brain
A 14-page PDF compiled from TypeSafe and Anthropic docs lays out an architecture where Opus 5.5 thinks and Jev decides, with Choice, Score and Noul evaluated in parallel and branching on probability to skip most generation calls.
JEV + Opus 5.5 is insane for building a company brain... I collected the whole architecture from TypeSafe and Anthropic docs into a 14-page PDF. Here are the 10 steps: step 1 → meet the pair: Opus 5.5 thinks, Jev decides, your code holds the branch. two models, one loop, no prompt in the middle step 2 → stop asking a text generator for a boolean: Jev takes a state and returns a typed answer with a calibrated probability in 0.44s for $0.00035 step 3 → ask everything at once: Choice, Score and Noul all evaluated in parallel, so the fourth question costs almost nothing. ask what you might need, not what you can afford step 4 → branch on the number: 0.999 is not text you parse, it is the if statement. ~99% of turns end here and never become a generation call step 5 → stop routing blind: Opus 5.5 → Sonnet → 5.5 costs 5.84 vs 3.32 for pure 5.5, because handing back reprocesses the whole context step 6 → keep one context warm instead: cache reads at $0.20 per Mtok are 20x cheaper than loading fresh. route work, not context step 7 → escalate, don't delegate: the hard 1% goes to Opus 5.5 with 1M context, 128K output and 66.4% on Terminal-Bench 4.0. pay for thinking, not plumbing step 8 → score every chunk per query: keep whole, summarize, or drop. context stops being a transcript you append to and becomes something rebuilt each turn step 9 → gate the command, not the intent: classify the concrete bash call before it executes. the auto-mode that lived inside closed harnesses, now in your own code step 10 → judge 100% of runs: $3.50 a day for 10,000 traces, variance 92-913x lower than an LLM judge, and it matched the human label on all 500 decisions the result: a while loop that pays a frontier model for every small decision becomes a brain that spends a third of a cent to notice and spends properly to think Copy the complete 14-page company brain blueprint, then read the full 10-step roadmap below ↓
This post quotes another post: x.com/0xmovez/status/2101007482919227841