BioFmt diagnostics use stable rule codes. Use the editor quick-fix menu on a diagnostic to open this rule reference, open the upstream specification, copy details, or apply a safe fix when one exists.
GFF3 files must declare the version before feature records, comments, or FASTA content.
Required first line:
##gff-version 3
Safe fix: BioFmt can insert ##gff-version 3 at the top of the file. This edit does not change feature coordinates, attributes, or sequence content.
Specification: GFF3 version directive
For other diagnostics, use BioFmt: Open specification from the quick-fix menu to jump to the source format document. Use BioFmt: Copy details to copy the rule code, summary, and exact specification URL into bug reports or notes.