- meta/.pre-commit-config.yaml: move pytest-coverage hook to pre-commit stage
- scripts/pytest_changed_packages.py: single batched pytest -n auto invocation
with one --cov flag per affected python_pkg subpackage, wrapped in
systemd-run --user --scope -p MemoryMax=4G -p MemorySwapMax=0 when available
- python_pkg/steam_backlog_enforcer/tests/conftest.py: new autouse
_no_real_sleep fixture patches time.sleep across game_install /
library_hider / steam_api / _enforce_loop. Removes 3x 15s real sleeps
in TestFinalizeCompletion that fired through _ensure_steam_running
steam_backlog_enforcer test wall time: 33.97s -> 5.61s (xdist, no-cov)
5-package batched run: 732 tests in 1.37s @ 668% CPU
Coverage stays at 100% on all affected packages.
Evidence: docs/superpowers/evidence/pre-commit-pytest-batch-2026-05-14.json
