sysml2kit

API-first Python tooling for building, querying, validating, and automating SysML v2 models.

pip install sysml2kit            # build, write, query, validate, diff
pip install "sysml2kit[parse]"   # + read .sysml files (sysmlpy backend)

sysml2kit is the requirements/architecture/traceability layer for engineering automation stacks: build a system model in Python, emit standard SysML v2 textual notation and Systems Modeling API JSON, answer traceability questions (which requirements are unsatisfied? unverified? allocated where?), validate, and diff.

Reference spec release: OMG SysML-v2-Release tag 2026-05. The element subset and known deviations are documented in concepts and the repo's SPEC.md.

Start with the quickstart, then the traceability page — the queries there are the point of the package. For antenna/RF domain content, see the RF library.