# The house laws, enforced on every push.
#
# The invariant suites are CPU-only and download nothing (they run on tiny
# synthetic trunks), so this is a cheap, fast guard on the contracts that
# cost real GPU hours to establish: the toggle law, bit-exact detach, the
# zero-init inertness contract, the dtype law, and the band-coordinate law.
name: invariants

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  invariants:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"
      - name: Install torch (CPU) + safetensors
        run: |
          python -m pip install --upgrade pip
          pip install torch --index-url https://download.pytorch.org/whl/cpu
          pip install safetensors
      - name: Run the invariant suites
        run: python tests/test_invariants.py