Serverless V3 AWS Lambda Runtime Schema Override

A Serverless Framework v3 plugin that overrides the default AWS Lambda runtime schema, allowing users to continue using newer or custom runtimes with Serverless v3 (which is unmaintained). Current stable version: 1.0.0. The plugin bakes in recent runtimes and supports manual override via custom.awsLambdaRuntimeSchemaOverride. Unlike workarounds that disable config validation, this plugin preserves configValidationMode: error. Note: sls invoke local is not affected.