// Koru Standard Library: the `define` part of bridge.kz — install a subflow
// declaration as a session verb (the REPL define). Joined via `~part define`
// in bridge.kz; merged into the bridge module at load.
//
// The vocabulary grows at runtime: `tor name { args }` + `name = <body>`
// becomes a verb callable on subsequent runs, held in the session's durable
// defined-flows table. The body's calls run through the same possession
// machinery as any dispatch, so a defined flow cannot reach beyond what the
// session holds. The agent hears "defined name" — or the parse error — fed
// back into the transcript (the honest-diagnostics rule applies here most of
// all: a wrong declaration needs a truthful error).
~pub tor define { br: *Bridge, source: string }
| defined string
| parse-error { message: string, line: u32, column: u32 }