Workflow: Generate → Validate → Iterate

This workflow assumes you are contributing to spx-examples (or mirroring its conventions in your own model repo).

Prereqs (one-time)

git clone https://github.com/HammerHeads-Engineers/spx-examples.git
cd spx-examples

Set your product key (pick one):

• Edit .env and set SPX_PRODUCT_KEY=...

• Or export it in your shell: export SPX_PRODUCT_KEY=...

Install Python tooling:

poetry install --with dev

Start SPX Server:

docker compose up -d

Generate

1. Pick the closest template under library/domains/....

2. Copy it into the correct domain/vendor folder.

3. Keep name: aligned with the file stem and keep YAML structure consistent with docs/MODEL_LANGUAGE.md.

Validate

Run repo validation (model files + catalog references):

poetry run python tools/validate_models.py

Expected success output:

Model validation passed.

Iterate (tests + UI)

Run the test suite (or target a subset first):

poetry run pytest

For interactive debugging, inspect the running Instance in the UI:

• UI concepts: ui-reference/README.md

• MiL tests (deterministic stepping): getting-started/use-in-unit-tests-mil.md

End-to-end example (real template → edit → test)

Goal: create a SCPI multimeter variant with a new fault scenario and a regression test.

1. Start from the template:

• library/domains/measurement_instruments/generic/multimeter__scpi.yaml

1. Copy it:

cp library/domains/measurement_instruments/generic/multimeter__scpi.yaml \\
  library/domains/measurement_instruments/generic/multimeter_overrange__scpi.yaml

1. Edit the new model:

• File: library/domains/measurement_instruments/generic/multimeter_overrange__scpi.yaml

• Update:

  • name: multimeter_overrange__scpi

  • Add a scenario under scenarios: (follow patterns in the source template)

Example scenario shape:

scenarios:
  overrange_spike:
    enabled: true
    description: "Brief overrange voltage spike for driver robustness tests."
    duration: 1.0
    overrides:
      $out(voltage): 400.0

1. Register it in the catalog:

• File: library/catalog/models.yaml

• Add a new entry with:

  • path: library/domains/measurement_instruments/generic/multimeter_overrange__scpi.yaml

  • domain: measurement_instruments

  • protocols: [scpi]

  • services: [{id: scpi_tcp_stack}] (match existing SCPI models)

1. Add a MiL test:

• Copy an existing pattern:

  • tests/shared/integration/scpi_multimeter_sut_example.py

• Create a new test under a test_*.py file (so pytest collects it), e.g.:

  • tests/core/integration/test_scpi_multimeter_overrange.py

• Minimal assertions to include:

  • loads the model from disk,

  • creates an Instance,

  • starts the new Scenario,

  • reads the SCPI response and asserts the expected range/behavior.

1. Run:

poetry run python tools/validate_models.py
poetry run pytest -k scpi_multimeter

1. Inspect in UI (optional):

• Start the UI container (see spx-examples/docker-compose.yml for the spx-ui service).

• Open the UI and inspect the instance attributes/scenarios.