Bounds a dispatch held on the behaviour-chain gate, which exists only when a RegistryFactory behaviour is declared. A held dispatch that waits longer than this rejects with ChainGateTimeoutError, whose message names the likely cause (a plugin publishing during its own register()); the gate itself is left in place, so later dispatches refuse the same way rather than delivering through a partial chain.

Default 10_000 ms. 0 disables the bound and restores the wait-forever behaviour, for an application that would rather hang than fail. The value must be a finite, non-negative number no greater than 2_147_483_647: NaN, a negative value, Infinity, or a larger value throws a RangeError naming this option at registration, when a behaviour factory arms the gate (Infinity does NOT mean wait-forever — 0 does). Ignored entirely when no behaviour factory is configured, because the gate is then never armed. Declared on this shared base — never per-arm — since the gate exists for every broker.