Open
Independent reproductions and public eval surfaces — clearly labeled.
Jev design checklist
Design gates before you write clients: action space, atomic questions, state filter, unofficial stance. Not a TypeSafe build guide clone.
Jev for platform teams
Production habits for a shared Jev decision layer: skill install, constants file, LangChain hooks. Jev routes; agents act.
Jev implementation checklist
Wire the client: pin jev-1.13.0, door-specific model ids, retries, traces, eval harness. Production gates from SEO-GEO.
Jev launch checklist
Ship gates: pinned model, fitted floors, handoff SLA, labeled vendor claims, docs.typesafe.ai outbound. Unofficial.
Jev playbook
Production playbook: design → implement → launch checklists, plus operate loops. Beats a narrative-only “build with System One” guide.
OpenJev (now SemIf) is not Jev
OpenJev / SemIf is an independent open-source project that reproduces a Jev-like interface on open models. It is not TypeSafe and not this site.
Public TypeSafe evals
TypeSafe points at a workflow-evals site for examples, disagreements, and full queries. Use that — not invented leaderboards.
TypeSafe Jev Anti Patterns | TypeSafe Jev System One
Explore anti patterns for the Jev decision model — TypeSafe Jev Anti Patterns. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Api Reading Guide | TypeSafe Jev System One
Explore api reading guide for the Jev decision model — TypeSafe Jev Api Reading Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Architecture Patterns | TypeSafe Jev System One
Explore architecture patterns for the Jev decision model — TypeSafe Jev Architecture Patterns. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Best Practices | TypeSafe Jev System One
Explore best practices for the Jev decision model — TypeSafe Jev Best Practices. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Common Mistakes | TypeSafe Jev System One
Explore common mistakes for the Jev decision model — TypeSafe Jev Common Mistakes. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Cost Planning | TypeSafe Jev System One
Explore cost planning for the Jev decision model — TypeSafe Jev Cost Planning. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Decision Templates | TypeSafe Jev System One
Explore decision templates for the Jev decision model — TypeSafe Jev Decision Templates. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Documentation Map | TypeSafe Jev System One
Explore documentation map for the Jev decision model — TypeSafe Jev Documentation Map. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Evaluation Guide | TypeSafe Jev System One
Explore evaluation guide for the Jev decision model — TypeSafe Jev Evaluation Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Evidence Templates | TypeSafe Jev System One
Explore evidence templates for the Jev decision model — TypeSafe Jev Evidence Templates. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Feedback Guide | TypeSafe Jev System One
Explore feedback guide for the Jev decision model — TypeSafe Jev Feedback Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev For Data Teams | TypeSafe Jev System One
Explore for data teams for the Jev decision model — TypeSafe Jev For Data Teams. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev For Enterprises | TypeSafe Jev System One
Explore for enterprises for the Jev decision model — TypeSafe Jev For Enterprises. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev For Operations | TypeSafe Jev System One
Explore for operations for the Jev decision model — TypeSafe Jev For Operations. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev For Product Teams | TypeSafe Jev System One
Explore for product teams for the Jev decision model — TypeSafe Jev For Product Teams. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev For Startups | TypeSafe Jev System One
Explore for startups for the Jev decision model — TypeSafe Jev For Startups. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Glossary Guide | TypeSafe Jev System One
Explore glossary guide for the Jev decision model — TypeSafe Jev Glossary Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Governance Guide | TypeSafe Jev System One
Explore governance guide for the Jev decision model — TypeSafe Jev Governance Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev How Decides | TypeSafe Jev System One
Explore how decides for the Jev decision model — TypeSafe Jev How Decides. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Latency Planning | TypeSafe Jev System One
Explore latency planning for the Jev decision model — TypeSafe Jev Latency Planning. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Learning Path | TypeSafe Jev System One
Explore learning path for the Jev decision model — TypeSafe Jev Learning Path. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Migration Guide | TypeSafe Jev System One
Explore migration guide for the Jev decision model — TypeSafe Jev Migration Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Monitoring Guide | TypeSafe Jev System One
Explore monitoring guide for the Jev decision model — TypeSafe Jev Monitoring Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Observability Guide | TypeSafe Jev System One
Explore observability guide for the Jev decision model — TypeSafe Jev Observability Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Operating Model | TypeSafe Jev System One
Explore operating model for the Jev decision model — TypeSafe Jev Operating Model. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Policy Templates | TypeSafe Jev System One
Explore policy templates for the Jev decision model — TypeSafe Jev Policy Templates. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Privacy Guide | TypeSafe Jev System One
Explore privacy guide for the Jev decision model — TypeSafe Jev Privacy Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Questions For Analysts | TypeSafe Jev System One
Explore questions for analysts for the Jev decision model — TypeSafe Jev Questions For Analysts. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Questions For Builders | TypeSafe Jev System One
Explore questions for builders for the Jev decision model — TypeSafe Jev Questions For Builders. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Questions For Buyers | TypeSafe Jev System One
Explore questions for buyers for the Jev decision model — TypeSafe Jev Questions For Buyers. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Questions For Legal | TypeSafe Jev System One
Explore questions for legal for the Jev decision model — TypeSafe Jev Questions For Legal. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Questions For Security | TypeSafe Jev System One
Explore questions for security for the Jev decision model — TypeSafe Jev Questions For Security. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Quick Reference | TypeSafe Jev System One
Explore quick reference for the Jev decision model — TypeSafe Jev Quick Reference. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Reference Architecture | TypeSafe Jev System One
Explore reference architecture for the Jev decision model — TypeSafe Jev Reference Architecture. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Review Templates | TypeSafe Jev System One
Explore review templates for the Jev decision model — TypeSafe Jev Review Templates. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Roadmap | TypeSafe Jev System One
Explore roadmap for the Jev decision model — TypeSafe Jev Roadmap. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Security Guide | TypeSafe Jev System One
Explore security guide for the Jev decision model — TypeSafe Jev Security Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Success Metrics | TypeSafe Jev System One
Explore success metrics for the Jev decision model — TypeSafe Jev Success Metrics. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Team Roles | TypeSafe Jev System One
Explore team roles for the Jev decision model — TypeSafe Jev Team Roles. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Testing Guide | TypeSafe Jev System One
Explore testing guide for the Jev decision model — TypeSafe Jev Testing Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Versioning Guide | TypeSafe Jev System One
Explore versioning guide for the Jev decision model — TypeSafe Jev Versioning Guide. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev What Is Jev | TypeSafe Jev System One
Explore what is jev for the Jev decision model — TypeSafe Jev What Is Jev. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev When To Use Jev | TypeSafe Jev System One
Explore when to use jev for the Jev decision model — TypeSafe Jev When To Use Jev. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Why Use Jev | TypeSafe Jev System One
Explore why use jev for the Jev decision model — TypeSafe Jev Why Use Jev. Independent unofficial notes; confirm against docs.typesafe.ai.
TypeSafe Jev Workflow Examples | TypeSafe Jev System One
Explore workflow examples for the Jev decision model — TypeSafe Jev Workflow Examples. Independent unofficial notes; confirm against docs.typesafe.ai.