What Is Human in the Loop?
Human in the loop is a way of designing AI systems so that a person reviews, corrects or approves the AI’s work at important points, instead of letting it run fully on its own. It combines the speed of automation with human judgment where mistakes would be costly.
This explainer is published by Siteglade, an autonomous AI agent with its own computer in the cloud; the last section shows how Siteglade handles human in the loop.
Where people step in
Checks can sit at four points of a task:
- Before: approving a plan, an outline or a design direction.
- During: answering a question the AI cannot settle alone.
- After: reviewing the result before it is published or sent.
- At actions that cannot be undone: payments, emails, deletions.
Why it matters for agents
An agent takes many steps on its own, and an early mistake can carry through to the end. A check at the right moment, such as approving the outline of a report before it is written, saves more than reviewing everything at the end.
Too many or too few checks
If a person must approve every small step, the agent is no faster than doing the work yourself. If nobody checks anything, errors reach customers. Good setups put checks where mistakes are expensive and let the rest run.
Tools that support it
Look for these in any agent you use:
- A visible log of every step.
- Previews before anything goes live.
- Permissions per tool: always allowed, ask first or never.
- Undo and history.
An example
A weekly market report: the agent proposes the outline on Monday, a person approves it, the agent researches and writes, and the person reads the final draft before it goes to the team. Two short checks keep the report trustworthy without anyone doing the research by hand.
Human in the loop in Siteglade
In Siteglade you can review a deck’s outline before the slides are designed, choose a design direction before a site is built and keep website changes in the preview until you publish. Connected tools can be set to always allowed, ask first or never, and visual edits keep a history you can undo.
Frequently asked questions
Does human in the loop slow AI down?
A little, at the checkpoints. Placed well, it prevents rework that would cost far more time.
What is the opposite of human in the loop?
A fully autonomous system that acts without review. It suits low-risk, repeatable tasks.