# tractor docs diagram: multi-actor debugger REPL
# serialization via the root actor's tty lock.
vars: {
  d2-config: {
    sketch: true
    theme-id: 1
    pad: 16
    layout-engine: elk
  }
}
shape: sequence_diagram
mary: "subactor 'mary'"
root: "root actor\n(owns the tty)"
bob: "subactor 'bob'"
mary -> root: "tractor.pause(): acquire tty lock"
root -> mary: "granted: pdb REPL is yours"
bob -> root: "tractor.pause(): acquire tty lock"
mary -> root: "continue: release lock"
root -> bob: "granted: pdb REPL is yours"