boltra 0.4.0

FastAPI development kit with Rust-powered performance modules

Boltra

Django-like productivity for FastAPI projects.

Boltra is a FastAPI development kit for building modern backend systems faster. It generates direct FastAPI code and adds structure, CLI automation, apps, ORM, admin, auth, workers, and Rust-powered performance modules — without hiding FastAPI.

boltra --help
boltra --version
boltra new myapp
cd myapp && uv sync && boltra dev

# Coming in Phase 5+
boltra add orm

Status

Early development. See doc/plan/phase.md for the phased roadmap.

Track	Phases	Focus
Foundation	0–8	CLI, project generator, apps, settings
ORM Core	9–18	From-scratch async ORM (Python)
ORM Rust	19–21	SQL builder, row decoder, pool helpers
Batteries	22–28	Admin, auth, worker, AI, Docker, tests
Hardening	29–32	Observability, security, benchmarks
V1	33	Stable release

Stack

Layer	Tool	Role
Python	uv	Fast package manager and virtualenv
Python ↔ Rust	maturin + PyO3	Native extension build and FFI
Rust	cargo	Hot-path acceleration (SQL, row decode)
Quality	ruff, mypy, pytest, pre-commit	Lint, types, tests

Requirements

• Python ≥ 3.12
• uv (package manager)
• Rust ≥ 1.85 (maturin compiles boltra._native on install)

Development

# Install Python (uv manages the venv automatically)
uv sync --group dev

# Rebuild the PyO3 extension after Rust changes
uv run maturin develop --uv

# Run quality checks
uv run ruff check .
uv run ruff format --check .
uv run mypy src
uv run pytest

# Verify Python fallback when native is disabled
BOLTRA_DISABLE_NATIVE=1 uv run pytest

# Install pre-commit hooks
uv run pre-commit install

Native extension

The Rust crate crates/boltra-core exposes boltra._native via PyO3. Python code uses boltra.native.is_available() and always has a fallback path.

import boltra

boltra.is_available()      # True when PyO3 extension is loaded
boltra.native_version()    # "0.4.0"

Disable native acceleration (for testing or unsupported platforms):

BOLTRA_DISABLE_NATIVE=1 uv run pytest

Repository layout

boltra/
├── src/boltra/              # Python package
│   ├── native.py            # Rust bridge + fallback
│   └── _native.pyi          # Type stubs for PyO3 module
├── crates/boltra-core/      # PyO3 extension (maturin)
├── tests/
├── benchmarks/
├── doc/
│   ├── user/                # end-user guides
│   ├── developer/           # contributor docs
│   └── plan/
├── pyproject.toml           # maturin build backend
├── Cargo.toml               # Rust workspace (release LTO enabled)
└── uv.lock

Documentation

Audience	Start here
Users	doc/user/ — install, CLI
Developers	doc/developer/ — architecture, files, workflow
Roadmap	doc/plan/phase.md
Rusjango migration	doc/plan/rusjango-migration.md
Changelog	doc/plan/CHANGELOG.md

• Project vision
• Contributing

License

MIT — see LICENSE.