v1.0

• Internal command names changed from nonstandard nd* to nd@
• Add key-value options to package and environments to configure dimensions and enable use of environments other than array to generate proof table (e.g., tabular, longtable)
• Add fitchproof environment
• Add commands to make printing of rule names, justifications, and line references configurable
• Add option to suppress printing of outermost scope line

Full Changelog: v0.6...v1.0

v1.0-beta2

Full Changelog: v1.0-beta...v1.0-beta2

v1.0-beta

Full Changelog: v1.0-alpha...v1.0-beta

v1.0-alpha

Adds key-value options to package and commands for customizing spacing, rule names, and justification formatting.

v0.6

• Reformatted documentation
• Package identifies itself using \ProvidesPackage
• Undefined references now printed as ?? and warning (only) issued using \PackageWarning
• Uploaded to CTAN

Full Changelog: v0.5...v0.6

v0.5

Original version of Peter Selinger's fitch.sty, v0.5, from https://www.mathstat.dal.ca/~selinger/fitch/