Reviving an Abandoned Fastify Plugin for RFC 9457 Problem Details

A developer revisited a Fastify plugin, fastify-rfc9457, that they had published and then left untouched for about a year. Its existing tests still passed, but the lint script had never worked and its dependency had moved to a new major version, so they updated it and released version 1.0.1 through a more secure GitHub Actions publishing flow. The plugin addresses the common problem of APIs returning inconsistent error formats, which forces clients to write custom parsers. It implements RFC 9457, the IETF standard for HTTP error responses that defines a consistent shape using the application/problem+json content type. The plugin applies this format automatically across routes, including validation failures and not-found errors, so developers don't have to format every error by hand.}