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Extensions & Appendices

Implementations MAY add custom frontmatter fields prefixed with x-:

x-review-board: ["alice", "bob"]
x-implementation-phase: 2

Custom fields MUST NOT conflict with reserved field names.

Implementations MAY add custom sections after the Audit section.


The RECOMMENDED MIME type for Structured MADR documents is:

text/markdown; variant=structured-madr

  • Frontmatter SHOULD NOT contain sensitive information
  • File paths in audit findings SHOULD be relative
  • External links SHOULD use HTTPS

See examples/complete-example.md for a fully compliant example.


  • Initial release
  • YAML frontmatter specification
  • Body section requirements
  • Audit section specification
  • JSON Schema definition