name: wai-quantum neural-processor member

# The fabric's neural-processor member: exact 32×32 products from 4-bit limbs,
# every limb product and limb sum formed in fp16 on the neural processor (each
# value an integer fp16 holds exactly), the host assembling; certified
# bit-exact against the CPU reference's pinned corpus digests.
#
# - npu-mac (the macOS runner): the platform's model runtime must place every
#   operation of the model on the neural processor (its compute plan says so,
#   or the member is refused); the device tests must find the declared
#   processor, agree with the CPU on the probe and on random states, reproduce
#   all four pinned certificates, and catch both model mutants.
# - npu-absent (a Linux container): the same build finds no member and says
#   why; the device tests run over no member with the declaration `none`.

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

on:
  pull_request:
    paths:
      - 'wai/wai-quantum/**'
      - 'rust-toolchain.toml'
      - '.github/workflows/wai-quantum-npu.yml'
  schedule:
    - cron: '22 4 * * *'

jobs:
  # Does this pull request's own diff touch the paths below? This forge matches a
  # workflow's `paths:` against the push, so a merge of main into a branch fires the
  # workflow whatever the pull request changes; every job here waits on this answer.
  # A push to main, a schedule, or anything the script cannot determine answers
  # `true` (scripts/pr-touches-paths.py).
  relevant:
    name: does this change touch it
    runs-on: linux-arm64
    outputs:
      run: ${{ steps.gate.outputs.run }}
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0
      - id: gate
        run: |
          set -euo pipefail
          r=$(python3 scripts/pr-touches-paths.py .github/workflows/wai-quantum-npu.yml \
                "${{ github.event.pull_request.base.sha }}" \
                "${{ github.event.pull_request.head.sha }}")
          echo "this change touches wai-quantum-npu: $r"
          echo "run=$r" >> "$GITHUB_OUTPUT"

  npu-mac:
    name: member · neural processor (macos)
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: macos
    timeout-minutes: 120
    env:
      WAI_QUANTUM_NPU_EXPECT: npu-0
    steps:
      - uses: actions/checkout@v5
      # launchd's PATH omits cargo on the macOS host runner.
      - name: Put cargo on PATH
        shell: bash
        run: echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
      - name: The member's unit tests
        shell: bash
        working-directory: wai/wai-quantum
        run: |
          set -euo pipefail
          nice -n 10 cargo test --locked --features quantum_fabric_npu --lib -- quantum_fabric_npu:: quantum_fabric::npu:: 2>&1 | tee "$RUNNER_TEMP/unit.log"
          grep -qE '^test result: ok\. [1-9][0-9]* passed; 0 failed' "$RUNNER_TEMP/unit.log" || { echo "::error::no unit test ran"; exit 1; }
      - name: The member's device tests
        shell: bash
        working-directory: wai/wai-quantum
        run: |
          set -euo pipefail
          report="$RUNNER_TEMP/npu-report.txt"; : > "$report"
          export WAI_QUANTUM_NPU_CACHE="$RUNNER_TEMP/npu-cache"
          WAI_QUANTUM_NPU_REPORT="$report" nice -n 10 \
            cargo test --locked --release --features quantum_fabric_npu --test npu_member -- --test-threads=1 2>&1 | tee "$RUNNER_TEMP/device.log"
          grep -qE '^test result: ok\. 9 passed; 0 failed' "$RUNNER_TEMP/device.log" || { echo "::error::not every device test ran and passed"; exit 1; }
          cat "$report"
          key="$WAI_QUANTUM_NPU_EXPECT"
          grep -qx "npu devices: as declared ($key)" "$report" || { echo "::error::the processor found is not the declared one"; exit 1; }
          grep -qE "^npu placement: key=$key( [a-z0-9_.]+=MLNeuralEngineComputeDevice)+$" "$report" || { echo "::error::an operation was not placed on the neural processor"; exit 1; }
          n="$(grep -c "^npu certified: key=$key .* parity=bit-exact " "$report")"
          [ "$n" = 4 ] || { echo "::error::$n of 4 certificates were earned"; exit 1; }
          grep -qx "npu mutants: key=$key killed 2 of 2" "$report" || { echo "::error::a model mutant survived"; exit 1; }

  npu-absent:
    name: member · neural processor absent (linux)
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: linux
    timeout-minutes: 60
    env:
      WAI_QUANTUM_NPU_EXPECT: none
    steps:
      - uses: actions/checkout@v5
      - name: Install Rust 1.98.0
        shell: bash
        run: |
          export PATH="$HOME/.cargo/bin:$PATH"
          command -v rustup >/dev/null 2>&1 || \
            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.98.0
          rustup toolchain install 1.98.0 --profile minimal
          rustup default 1.98.0
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
      - name: No neural processor here, and the member says so
        shell: bash
        working-directory: wai/wai-quantum
        run: |
          set -euo pipefail
          report="$RUNNER_TEMP/npu-report.txt"; : > "$report"
          WAI_QUANTUM_NPU_REPORT="$report" cargo test --locked --features quantum_fabric_npu --test npu_member -- --test-threads=1 2>&1 | tee "$RUNNER_TEMP/device.log"
          grep -qE '^test result: ok\. 9 passed; 0 failed' "$RUNNER_TEMP/device.log" || { echo "::error::not every device test ran and passed"; exit 1; }
          grep -qx 'npu devices: as declared (none)' "$report" || { echo "::error::the absent case was not established"; exit 1; }