Developed and launched an ephemeral testnet capability for the pubky/pubky-core repository, enabling homeservers to be initialized with randomly generated keypairs. This work involved refactoring the homeserver creation flow to support dynamic keypair generation, enhancing both the flexibility and security modeling of test environments. Comprehensive tests were added to ensure coverage of the new randomization paths, and usage documentation was updated to guide future contributors. Defensive checks were implemented to minimize startup failures in CI pipelines. The project was executed using Rust, with a focus on backend development and robust testing practices to support broader testnet scenarios and rapid feedback cycles.