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jet/propulsion

Propulsion is an event sourcing and streaming framework that ingests, processes, and persists events across diverse storage backends such as Cosmos DB, DynamoDB, Kafka, and SQL databases. It provides a unified pipeline architecture for reading from change feeds and queues, handling parallel processing, and writing to various sinks. The system includes comprehensive monitoring via Prometheus metrics, CLI tools for data synchronization, and extensive integration tests to ensure reliability.

64.1

Adequate · 1 August 2026

8.1k

lines of production code

F#

primary language

1

bus factor · 20 authors in all

3

measurements over time

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How it got here

2018–2019 · Propulsion library expansion and tooling

This period focused on expanding the Propulsion library with new features for Kafka, EventStore, and Prometheus metrics integration, alongside a unified CLI tool for data synchronization. The work also involved modernizing the .NET framework dependencies and removing the legacy F# Kafka wrapper.

10 changes

2020–2024 · multi-backend event sourcing support

The project expanded its event sourcing capabilities by implementing a wide range of storage backends, including SQL, Cosmos DB, EventStore, DynamoDB, Memory, and PostgreSQL. These features were accompanied by architectural diagrams and integration tests to ensure robustness across different data stores.

13 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 1 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 87aced593d — the exact code this score is about.
  • Scored under rubric rubric-2026.08.18. Score the same commit under that rubric and you get the same number.
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