Changelog

All notable changes to this project are documented here.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

One concrete Error type carrying a message, severity, optional machine-readable code, and an optional wrapped cause; satisfies the standard error interface and Unwrap so errors.Is / errors.As / errors.Unwrap traverse the chain.
New (leaf / sentinel constructor) and Wrap (anyhow-style context wrap; nil in → nil out; inherits the wrapped severity by default).
WithSeverity and WithCode constructor options.
SeverityOf (walks the chain, defaults to SeverityError) and CodeOf (first non-empty code, outermost first).
Join aggregate mirroring errors.Join with rolled-up severity (max) and code (first non-empty), errors.Is / errors.As reaching every member.
Severity ladder (SeverityNotice / SeverityWarning / SeverityError) with String() and DefaultSeverity.