@grest-ts/discovery-local

IPC-based service discovery for local development and testing. Used internally by the framework — you typically don't interact with this package directly.

For a full overview of how discovery works, see the Discovery guide.

What it does

Runs a local discovery server that acts as a central router. Service instances connect over IPC, register their routes, and discover each other through the router. The router also acts as a reverse proxy, forwarding requests to the correct backend based on path prefix matching.

Exported classes

Class	Purpose
GGLocalDiscoveryClient	Connects to an existing discovery server
GGLocalDiscoveryResilientClient	Adds leader election with automatic failover — multiple instances compete for the router port, and if the leader dies, a follower takes over
GGLocalDiscoveryServer	The router itself

Testkit

Available via @grest-ts/discovery-local/testkit:

• GGLocalRoutingStrategySelector — controls routing strategies in tests (e.g. first, roundRobin, or a custom strategy)