"""Alexandria runtime package.

Holds the product code that operates on a vault via an explicit ``--vault`` path:
``vault_core`` (fs/config/graph/query), ``models`` (the ModelProvider abstraction),
``engine`` (the digest/sweep engines, migrated out of the vault), and ``mcp``
(the vault-mcp server). The sibling ``scripts`` package is the CLI/renderer —
build-time tooling; this package is what runs. See docs/V3-PLAN.md §2.4 and
docs/DEVAULT.md.

Version is single-sourced from ``scripts.__version__`` (enforced pairing with
pyproject lives in tests/test_version.py).
"""
