effect-and-errors

To handle domain errors in Effect applications, define them using Data.TaggedError to ensure predictable failure modes and standardize error typing across domain services and repository interactions.

Standardize HTTP error responses in Effect by implementing HttpError with httpStatus and httpMessage properties, applying this structure across HTTP boundaries to drive consistent responses and prevent internal state leakage.

Add observability to error handling in Effect streams by wrapping use cases with Effect.withSpan and executing them through Effect.runPromise patterns to track error propagation and failure modes.

Typed errors prevent internal state leakage at HTTP boundaries by using Data.TaggedError to model domain errors and implementing HttpError to ensure only safe, structured responses are exposed.

Effect workflows fail to propagate errors predictably when domain errors are not structured with Data.TaggedError, missing standardized error typing and propagation logic across services and HTTP boundaries.

The effect-and-errors Skill supports composing and propagating domain errors and HTTP-aware errors across multiple services in Effect programs, enabling reliable failure handling throughout the application architecture.