About Hindsight

Hindsight is an open-source event sourcing library for Haskell, designed to bring type safety and correctness to event-driven architectures.

Status

Hindsight is currently in active development. The core API is stabilizing, and we’re working toward a first Hackage release.

Contributing

We welcome contributions! Whether it’s:

• Reporting bugs or requesting features
• Improving documentation
• Submitting pull requests
• Sharing your use cases

Check out the contributing section of the documentation to get started, the issue tracker, or just send an email.

Community

Development is ongoing. Documentation and community channels coming soon.

License

Hindsight is released under the BSD3-Clause License. See the repository for full license text.

Acknowledgments

Hindsight builds on the excellent work of the Haskell community, including the excellent Ghc compiler and libraries such as:

• hasql and hasql-transaction for PostgreSQL integration and transactional guarantees
• tmp-postgres for isolated PostgreSQL testing infrastructure
• hedgehog and QuickCheck for property-based testing
• tasty for test orchestration
• aeson for JSON serialization
• stm, async, and unliftio for concurrency and exception handling
• fsnotify and filelock for filesystem watching and multi-process coordination

… and many others.

Thank you to all contributors and the broader Haskell ecosystem.