WeightsDB
Shared SQLAlchemy + Alembic plumbing: engines, sessions, pragmas, migrations, backup and health. No application table, no shared schema.
Status: Phases 1–3 complete — engine, sessions, types, migrations, backup/restore and health
are implemented and tested on SQLite (PostgreSQL exercised wherever a server is configured; see
docs/packages/weightsdb/development-plan.md).
Extracted from FreeWeight's infrastructure.db per ADR-0011; FreeWeight itself adopts this package
in its own Phase 12 — see docs/adoption-checklist.md.
Part of the Local AI Suite.
Install
pip install weightsdb
# or, with PostgreSQL support:
pip install "weightsdb[postgres]"
Quickstart
from weightsdb import create_engine_for, session_factory, session_scope
engine = create_engine_for("sqlite:///./myapp.sqlite3")
factory = session_factory(engine)
with session_scope(factory) as session:
...
See docs/quickstart.md for the full walkthrough (engine, schema, sessions, upserts, migrations, backup/restore, health, and testing your own application against it), and docs/packages/weightsdb/spec.md §20 for the formal acceptance criteria.
Documentation
Project documentation lives under docs/. Start with docs/README.md.
| Read this | For |
|---|---|
| docs/quickstart.md | Get started: engine, schema, sessions, migrations, backup, health |
| docs/adoption-checklist.md | FreeWeight Phase 12: what to delete, what changed shape, what must still pass |
| docs/packages/weightsdb/spec.md | Purpose, scope, non-goals, public contracts, configuration, acceptance criteria |
| docs/packages/weightsdb/development-plan.md | The phased build plan: goals, work, tests, acceptance criteria per phase |
Development
python -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"
pre-commit install
pytest -m "not live and not performance"
See CONTRIBUTING.md for the full workflow and SECURITY.md for
how to report a vulnerability.
License
Apache-2.0 — see LICENSE.
1 maintainer
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