# skypjack/entt

Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

Repository: https://github.com/skypjack/entt
Canonical: https://ross.abutalabs.com/products/entt
Homepage: https://github.com/skypjack/entt/wiki
Language: C++
License: MIT
License Family: permissive
Topics: header-only, modern-cpp, cpp, entity-component-system, game-development, game-programming, architectural-patterns, game-engine, gamedev, cpp17, game-dev, reflection, entt, ecs, ecs-framework, data-oriented-design, data-oriented, cpp20, no-dependencies, production-ready
Last push: 2026-08-26T16:09:14+00:00

## Health v2 (maintenance only)
Score: 86/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 62, longevity 100
- inputs: {"age_days": 3446, "days_push": 7, "days_rel": 41, "gap_med": 245, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13050, forks 1111 (observed 2026-08-28T04:11:01.847968+00:00)

## What it is
EnTT is a header-only, dependency-free C++17/20 entity component system (ECS) library for game programming and other data-oriented applications. It provides fast, reliable entity management along with extras like reflection, event dispatching, and resource handling.

## Use cases
- build a game engine with an entity component system in C++
- manage thousands of game entities with components efficiently
- replace OOP inheritance hierarchies with data-oriented design
- implement an event dispatcher or delegate system in C++
- add a lightweight ECS to an existing C++ project without dependencies
- prototype gameplay systems with fast component iteration

## When to choose
- you need a production-ready, battle-tested ECS in modern C++ (used by Minecraft)
- you want a header-only library with zero dependencies
- performance and cache-friendly component iteration matter
- you want C++17/20 idiomatic APIs with reflection and signaling extras

## When to avoid
- your project is not in C++ or targets pre-C++17 compilers
- you need a full game engine with rendering, physics, and audio out of the box
- you prefer a scene-graph or actor-model architecture over ECS

## Facets
- artifact type: library
- maturity: stable
- function: game-engine, simulation, serialization
- domain: simulation, developer-tools
- platform: cpp, cross-platform
- tags: ecs, entity-component-system, header-only, data-oriented-design, modern-cpp, no-dependencies, reflection, gamedev, game-development

## Member repositories
- skypjack/entt (main) score 86

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:01.847968+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:13:34.285222+00:00, confidence not recorded.
  - readme: https://github.com/skypjack/entt (fetched 2026-08-28T04:11:01.847968+00:00, sha 20d269979d73)
  - homepage: https://github.com/skypjack/entt/wiki (fetched 2026-08-29T08:09:11.556767+00:00, sha 0044c22505ca)
- Data as of 2026-08-30T08:39:29.467469+00:00.