Can the agent ever open a gate itself?

No. A gate opens on a recorded human decision. The record of what the agent did in shadow mode, compared with what the person did, is the evidence that decision is made against.

What happens to the work while it waits at the gate?

It waits with its evidence attached, so the gate holder sees a complete package. An exception the rules cannot decide is escalated to its owner rather than guessed at.

Oversight fails at both ends, with no gate at all and with a gate on every step

Today

Sign-off everywhere or nowhere, paid for in attention

You have seen both failure modes.
A workflow with no human step did something expensive before anyone looked, and a workflow with a sign-off on every step trained its reviewers to click through without reading.
"Keep a human in the loop" gets said in every planning meeting and almost never with a location attached.
A badly placed gate is paid for in attention, which is the scarcer resource.

With agents

One gate, on the consequential step, held by a name

Control moves from a promise to a position in the workflow.
Review attention goes to one decision instead of many.
The cost of oversight becomes visible and chosen.

The anatomy of an approval gate

An approval gate is a control with a position, a holder and a cost. The items below are the properties of a gate placed well.

The gate is a named person's sign-off at a specific step

Without it the workflow does not proceed. The name and the step are both part of the definition.

It sits on the consequential step

The consequential step is the one that is irreversible or expensive to reverse: a payment released, a message sent to a client, a permission changed, a record deleted. That is where the gate belongs.

Everything before it runs unattended

The agent gathers, reconciles and flags on its own, then presents a finished package at the gate. The person reviews one assembled decision rather than a stream of interruptions.

A gate differs from a review and from an escalation

A gate is sign-off before an action. A review is inspection after it. An escalation is the routing of an exception the rules cannot decide. Confusing them puts sign-off where inspection would do, or leaves an exception waiting at a gate built for routine approvals.

Human gate

The agent routes the consequential action to the named owner with the evidence attached, and waits. The gate is a step in the workflow's design, and How It Works describes how that step is enforced.

The gate costs something, and the cost is the reason placement matters

It costs latency at the gated step and it costs the reviewer's attention, and when gates sit on every step it costs the gate its meaning, because a reviewer who signs everything is inspecting nothing.

Gated by default, opened only by your decision

A consequential step starts gated. A gate is removed on a recorded human decision, never by the agent and never by drift. The evidence that supports such a decision is built in shadow mode, which has its own entry.

Results

What changes when the gate has a position

Control becomes structural

The gate is a step the workflow cannot pass without a person, so the guarantee is structural.

One decision, read once

The unattended steps deliver a finished package to the gate, so the reviewer reads a complete case once.

Oversight costed and chosen

Each gate is placed on purpose with its cost stated, so adding or removing one is a decision rather than a default.

Where this fits

Concept

This is the vocabulary every workflow entry in the library uses when it names a human gate on its consequential step, and the readiness checklist names the gate as one of its checks. How It Works is the way up from here. How It Works describes how a gate is enforced; this entry describes where it belongs and what it costs.

How It Works

Questions, answered

As few as its consequential steps require, which for most workflows is one. A gate on every step is the failure mode this entry opened with: the reviewer stops reading.

AI Opportunity Audit

Put the gate where the cost is real

Bring the workflow you are least willing to hand off and find its consequential step together.

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