Jev Founder, Diogo Amogo, just released 12-page PDF on building a Jev Harness for production agents
This is a 10-step blueprint for making agent decisions up to 200x faster and 400x cheaper without giving a model authority over your system:
step 1 → meet the decision layer: the LLM creates, Jev judges, code enforces and the harness decides what happens next
step 2 → expose every hidden decision: routing, evidence checks, retries, approvals, escalation and stopping should be visible parts of the agent graph
step 3 → stop dumping the entire transcript into every call: build a compact state packet with only the current goal, facts, evidence, constraints and available actions
step 4 → turn prompts into contracts: declare the possible outcomes, describe what each one means, add an escape route and version the decision like code
step 5 → route by confidence and consequence: automate high-confidence internal work, collect evidence in the middle and send dangerous actions to a human
step 6 → ask independent questions together: choose the next worker, estimate urgency and check approval against one immutable state snapshot
step 7 → build menus from live state: Jev should only see tools, workers, files and browser controls that actually exist and are allowed right now
step 8 → make retrieval decision-aware: deterministic filters remove impossible candidates, Jev keeps the evidence that matters and the LLM receives the smallest useful context
step 9 → create a receipt for every decision: preserve the state, contract version, full probability distribution, threshold, selected route and resulting action
step 10 → deploy in shadow mode: compare Jev with the existing agent, measure calibration and automate the safest branch before expanding the boundary
TypeSafe reports roughly 70–500ms for Jev-shaped decisions and pricing of $0.042 per million input tokens with no metered output-token cost
The real unlock is bigger than one benchmark:
Your most expensive model stops wasting time on decisions that never required another sentence
Send this PDF and the article below to your Claude Code or Codex instance and start rebuilding your agent around typed judgment ↓
Most AI agents waste tokens on decisions that never needed text
Jev turns routing, scoring, and verification into a fast decision layer
I broke down the architecture most agent builders are still missing ↓