Plugins

Plugins add optional transforms without tying the core engine to Fastify. A plugin declares a name, version, Zod options schema, and async buffer transform. Plugins are opt-in and isolated by a timeout; external AI workers are separate containers.

Start with the full plugin authoring guide. It includes a working example, registration, contract tests, and worker protocol details. The optional AI profile includes background removal, upscaling, alt-text generation, and NSFW scoring.