## Stack - **Language:** Python ≥3.12 (`railiance_fabric` package) - **Key deps:** jsonschema, PyYAML; SQLite registry at `.railiance-fabric/registry.sqlite3` ## Dev Commands ```bash python3 -m pytest tests/ # run the test suite make graph-explorer # registry-backed graph explorer (HOST/PORT/REGISTRY_DB overridable) python3 -m railiance_fabric.server --db .railiance-fabric/registry.sqlite3 ``` Local-only tooling — no production deploy surface in this repo.