PyMisha Docs + Parity Sync

Use when

• •API status changed.
• •New parity gaps were closed or discovered.
• •R tests were ported to Python.

Required updates

1. •Update implementation source-of-truth:

• •dev/notes/2026-01-27-pymisha-implementation-plan-v2.md

1. •Update user-facing status:

• •README.md

1. •Update R->Python test coverage tracker:

• •dev/notes/r-tests-porting-matrix.md

1. •If build/tooling policy changed:

• •dev/notes/2026-02-06-build-quality-modernization-plan.md

1. •Keep docs nav consistent:

• •docs/roadmap.md

Validation

1. •Build docs:

• •sphinx-build -W --keep-going -b html docs docs/_build/html

1. •Link check:

• •sphinx-build -W --keep-going -b linkcheck docs docs/_build/linkcheck

1. •Run changed/new tests:

• •pytest -q <targeted tests>

1. •Lint changed Python files:

• •ruff check <changed files>