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sschmid/Entitas

Entitas is an Entity Component System (ECS) framework for C# and Unity, designed to manage entity state, grouping, and system execution. The codebase provides a code generation engine that produces reactive systems, matchers, and component indices based on attributes. It also includes a Unity integration layer featuring visual debugging tools, inspector drawers, and a collector for observing entity changes.

62.4

Adequate · 5 August 2026

6.5k

lines of production code

C#

primary language

1

bus factor · 30 authors in all

2

measurements over time

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How it got here

2014–2022 · Entitas ECS Framework Modernization

This period was defined by a comprehensive modernization of the Entitas ECS framework, transitioning to modern .NET SDK-style project structures and implementing a robust, strongly-typed API for entity management. Key developments included the introduction of advanced features such as automatic entity reference counting, a flexible collector system, and a refactored system execution model with explicit lifecycle phases. Additionally, the Unity editor and sample projects were updated to support newer Unity versions and provide comprehensive examples of component and type usage.

18 changes

2023 · Generator refactoring and Unity tooling

This period focused on refactoring the code generation system to support configurable output and new attributes for cleanup and event handling. Concurrently, the project expanded its Unity integration with new debugging, profiling, and inspector tools, while also introducing performance benchmarks for core operations.

7 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 5 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 37547d1bd2 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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