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First v0.1.0 run: Windows + Linux + arm64 failed (no Python on those runners; the docker default image also lacks Python). macOS succeeded. - windows: install Python 3.12 via the official installer in-job (idempotent). - linux-amd64 / linux-arm64: run in nikolaik/python-nodejs:python3.12-nodejs20 (has python+pip AND node for actions/checkout; multi-arch covers the Pi). - macOS job unchanged (it worked). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016yT89n4zR4qbrySoSiEyZs