How an agent moves on the page, so that the people can follow it: it goes to where it works, presses, drags and lets go, and clicks, as a hand would. Only where it goes is sent, once for each gesture; each browser draws the way there on its own page, and the agent waits as long as that takes before its change lands.

A gesture's target is a place of a document, in the document's own terms (%{"doc" => "notebook:7/body", "at" => at}: a caret, a node, a cell), or an element of the app's page that it named (%{"anchor" => "edit"}, the element with data-issho-anchor="edit"). Components' tools move their agents with it; an app's own tools too:

# An app's tool: the agent goes to the button, clicks it, then acts.
:ok = Issho.Motion.click(participant, %{"anchor" => "new-page"})
{:ok, page} = Pages.create(...)

When it moves

An agent moves only for someone who can see it. Each browser of the room says what it shows (the page in the foreground, the documents of its components on the screen, whether its person wants motion): when no person of the room shows the target, or none wants motion, the agent is there at once. A browser that says nothing, or a person who follows the agent, counts as watching: the agent rather moves for no one than skips someone who looks.

Time

A gesture takes flight milliseconds to another document or element, step within the same one (each browser fits its own way into it). A tool call has a budget: its gestures together never take longer, the later ones shorter, then at once.

config :issho, Issho.Motion,
  travel: true,     # false: agents are there at once, everywhere
  flight: 450,
  step: 300,
  click: 150,       # the moment on a click before what it does
  budget: 3_000     # the most a tool call's gestures take, together

A component may move its agents or not (Kotoba's, Masu's and Hakushi's travel); this one setting turns motion off for all of them.