Human-in-the-loop
Also called HITL
Human-in-the-loop introduces a person’s decision into an automated process. In an agent workflow, execution can pause at a review point so a person can approve, change, or reject a proposed action.
[LangChain]In practice · hypothetical example
An assistant drafts a customer email and waits for an operator to approve or edit it before sending.
[LangChain]A little deeper
The system needs a defined review point and a way to continue from the decision. The presence of a person somewhere in the process does not imply that every action receives review. [LangChain]
A common mix-up
Human oversight means reviewing every model token.
Review can target selected actions or decisions. [LangChain]
An assistant pauses before sending an email and waits for approval. What is this?
Sources & editorial notes
Evidence: supported. Primary-source support for this scoped entry; publication approved by the project owner.
- Human-in-the-loop ↗ (opens in new tab)LangChain · Publication date unknown
Relevant section: Interrupt decision types
Last editorial review: 2026-09-13 by project-owner.
First observed in this corpus: Unknown.
Revision history
Revision 2 · Created 2026-09-13 · Updated 2026-09-13
Project owner approved the current content for publication. Existing evidence scope and limitations remain applicable.