feast-dev · franciscojavierarceo · Oct 7, 2025 · Oct 7, 2025
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+# Feast - Feature Store for Machine Learning
+
+Feast is an open source feature store for machine learning that helps ML platform teams manage features consistently for training and serving.
+
+## Project Overview
+
+Feast (Feature Store) is a Python-based project that provides:
+- **Offline Store**: Process historical data for batch scoring or model training
+- **Online Store**: Power real-time predictions with low-latency features
+- **Feature Server**: Serve pre-computed features online
+- **Point-in-time correctness**: Prevent data leakage during model training
+- **Data infrastructure abstraction**: Decouple ML from data infrastructure
+
+## Development Commands
+
+### Setup
+```bash
+# Install development dependencies
+make install-python-dependencies-dev
+
+# Install minimal dependencies
+make install-python-dependencies-minimal
+```
+
+### Code Quality
+```bash
+# Format Python code
+make format-python
+
+# Lint Python code
+make lint-python
+
+# Type check
+cd sdk/python && python -m mypy feast
+```
+
+### Testing
+```bash
+# Run unit tests
+make test-python-unit
+
+# Run integration tests (local)
+make test-python-integration-local
+
+# Run integration tests (CI)
+make test-python-integration
+
+# Run all Python tests
+make test-python-universal
+```
+
+### Protobuf Compilation
+```bash
+# Compile Python protobuf files
+make compile-protos-python
+
+# Compile all protos
+make protos
+```
+
+### Go Development
+```bash
+# Build Go code
+make build-go
+
+# Test Go code
+make test-go
+
+# Format Go code
+make format-go
+
+# Lint Go code
+make lint-go
+```
+
+### Docker
+```bash
+# Build all Docker images
+make build-docker
+
+# Build feature server Docker image
+make build-feature-server-docker
+```
+
+### Documentation
+```bash
+# Build Sphinx documentation
+make build-sphinx
+
+# Build templates
+make build-templates
+
+# Build Helm docs
+make build-helm-docs
+```
+
+## Project Structure
+
+```
+feast/
+├── sdk/python/          # Python SDK and core implementation
+├── go/                 # Go implementation
+├── ui/                 # Web UI
+├── docs/               # Documentation
+├── examples/           # Example projects
+├── infra/              # Infrastructure and deployment
+│   ├── charts/         # Helm charts
+│   └── feast-operator/ # Kubernetes operator
+└── protos/             # Protocol buffer definitions
+```
+
+## Key Technologies
+
+- **Languages**: Python (primary), Go
+- **Dependencies**: pandas, pyarrow, SQLAlchemy, FastAPI, protobuf
+- **Data Sources**: BigQuery, Snowflake, Redshift, Parquet, Postgres, Spark
+- **Online Stores**: Redis, DynamoDB, Bigtable, Snowflake, SQLite, Postgres
+- **Offline Stores**: BigQuery, Snowflake, Redshift, Spark, Dask, DuckDB
+- **Cloud Providers**: AWS, GCP, Azure
+
+## Common Development Tasks
+
+### Running Tests
+The project uses pytest for Python testing with extensive integration test suites for different data sources and stores.
+
+### Code Style
+- Uses `ruff` for Python linting and formatting
+- Go uses standard `gofmt`
+
+### Protobuf Development
+Protocol buffers are used for data serialization and gRPC APIs. Recompile protos after making changes to `.proto` files.
+
+### Multi-language Support
+Feast supports Python and Go SDKs. Changes to core functionality may require updates across both languages.
+
+## Contributing
+
+1. Follow the [contribution guide](docs/project/contributing.md)
+2. Set up your development environment
+3. Run relevant tests before submitting PRs
+4. Ensure code passes linting and type checking