Jev glossary
Core ConceptsLLM agentAgentic loop
Agent loop
A control pattern where the model chooses its next step repeatedly; TypeSafe's guidance is to prefer a code-owned workflow instead.
- Category
- Core Concepts
- Also known as
- LLM agent, Agentic loop
- Reading time
- 1 min
- Related terms
- 4
- Directory entries
- 2
- Docs
- docs.typesafe.ai
- Added
- 2026-09-24
Definition
The how-to-build guide describes agents as loops where the model processes instructions and chooses its next action. That works when a person is monitoring the process, but every loop adds another opportunity to go off the rails.
Jev is explicitly not an agent: it does not generate code or choose its own next action. The recommended replacement is a workflow of atomic questions whose answers code composes, with agent loops reserved for cases a workflow cannot express.
Tagsarchitectureagents
Related terms
Definitions that connect to this one.
AI-powered softwareThe architecture TypeSafe recommends: code owns the workflow and the model appears only where programmable common sense is needed.Core ConceptsCoding agentThe fastest-growing corner of the Jev ecosystem: MCP servers, tool-call gates, context pruners, and skill rankers.EcosystemDecompositionBreaking a broad judgment into one question per factor, then combining the answers with weights and rules you control in code.Core ConceptsAtomic questionA question that asks one specific, well-scoped thing, the kind of judgment a knowledgeable person makes in a few seconds.Core Concepts
From the Jev directory
Directory entries that go deeper on this term.
Design AI-powered software by keeping code in control and giving System One narrow, structured decisions to make.
Jev Practices & PatternsDocs#official#patterns#architecture
Official
The idea behind Jev: models that return typed decisions and probabilities instead of generated text, named after Kahneman's fast-thinking System 1, with confidence to route around uncertainty.
Jev Guides & ArticlesDocs#official#docs#architecture
Official
From the Jev AI model community
Posts from builders shipping with Jev right now.