commit 2919a6c42842c8a9d2fa482c59fdf6d6b0687ebf
Author: Claude <noreply@anthropic.com>
Date:   2026-05-29 17:34:59 +0000

    Match stolid's lint setup; self-apply placard via flake8 plugin discovery
    
    Drop the project-local [tool.black] line-length=79 (which conflicted
    with the upstream black default and forced noxfile.py to wrap) in favor
    of stolid's own pattern: black at the default 88 and stolid passed
    --max-line-length=88 --ignore=E203,E503,W503 so the two agree.
    
    Self-application is automatic: nox lint installs placard via
    ``pip install -e .``, and ``python -m stolid`` invokes flake8, which
    discovers placard's flake8.extension entry point alongside stolid's.
    ``flake8 --version`` in the lint venv now reports both plugins, and
    ``flake8 --select=PLC src/`` is clean.
