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Dzoukr/CosmoStore

CosmoStore is a modular event sourcing library that provides a generic, versioned API for managing event streams. It supports multiple storage backends, including Cosmos DB, Azure Table Storage, Marten, ServiceStack, LiteDB, and an in-memory implementation. The system is designed to allow each storage provider to be built, tested, and published as an independent NuGet package, with comprehensive test coverage for each backend.

50.7

Adequate · 20 July 2026

1.6k

lines of production code

F#

with JavaScript

1

bus factor · 8 authors in all

2

measurements over time

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How it got here

2018 · Modularization and build system refactoring

The project underwent a significant architectural shift to support multi-provider storage backends by splitting the codebase into independent NuGet packages. This period focused on refactoring the core library into modular components and establishing a structured FAKE-based build system to manage the new package structure and test suite.

4 changes

2019–2020 · Multi-backend expansion and test modernization

This period focused on significantly expanding the project's storage backends by introducing support for Marten, LiteDB, and in-memory stores, alongside modernizing the Azure Cosmos DB and Table Storage implementations. Concurrently, the testing infrastructure was overhauled by migrating to the Expecto framework and adding comprehensive integration tests for all new and existing storage providers.

12 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 20 July 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit baadb0b762 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.17. Score the same commit under that rubric and you get the same number.
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