Module errors 

Error hierarchy at the application/adapter boundary.

Three independent leaves (RepoError, ProviderError, UpstreamError) model the three distinct failure modes (persistence, ML provider, LLM upstream) so adapters can return the precise shape and the umbrella UseCaseError can wrap any of them with #[from].

Re-exports

pub use provider_error::ProviderError;

pub use repo_error::RepoError;

pub use upstream_error::UpstreamError;

pub use use_case_error::UseCaseError;

Modules

provider_error

Provider-layer errors.

repo_error

Persistence-layer errors.

upstream_error

Upstream (LLM proxy) errors.

use_case_error

Umbrella use-case error.