Official Adapters

Official adapters are separately installable crates. The facade stays lean, and vendor dependencies enter the application only when the application chooses that backend.

nidus = { package = "nidus-rs", version = "1.0.4", features = ["http", "config"] }
nidus-sqlx = { version = "1.0.4", features = ["sqlite", "health", "observability"] }
nidus-cache = { version = "1.0.4", features = ["moka", "health", "observability"] }

Adapters should register typed providers, expose health/readiness hooks when useful, add observability at adapter-owned boundaries, and still leave direct access to the underlying ecosystem client.

See SQLx, Cache, and the detailed integration contract for the concrete adapter shape.