bevyengine / bevy
A refreshingly simple data-driven game engine built in Rust
github.com/bevyengine/bevyIndexed at 2d54877Up to date with upstreamRefreshes weekly
About this codebase
Bevy is a refreshingly simple data-driven game engine built in Rust that takes an application’s ECS world, input, and assets through a schedule-driven runtime pipeline (systems, queries, and rendering stages) and outputs a running 2D/3D game with a rendered frame. In practice, you use Bevy by building an `App` with the capabilities you need, adding components/resources and systems, and letting Bevy drive execution via its schedules and plugins until it can render (and optionally reflect, serialize, animate, or stream) the results.
Written by gpt-5.4-nano from the index
2,209 files and 59,265 symbols in 9 modules, led by Rust (1,937 files) and Shell (4).
Code health
This codebase scores 6.7 out of 10 for code health, which we rate fair. It also scores maintainability 7.6 and static performance 9.9 out of 10. The three are scored separately and never blended into one number. Risk is concentrated, as it usually is: 270 of 2,209 files are git hotspots, and they average 4.9 — which is where the fixes pay off most.
On the leaderboards:#2 of 3 Rust UI libraries#3 of 10 Rust repos
Do next
1 thing worth doing in the week to Oct 5, the last indexed commit, 1 of them now.
Now
- High
Clean up what this week's commits left: 4 serious findings in 4 files
4 commits in the last 7 days added or worsened them, and they are still open. Start with
crates/bevy_image/src/ctt_format.rs.- serious findings
- 4
- critical
- 0
- files
- 4
Medium effort
Improve what Repowise can see
Add a test coverage report
Without one, Repowise cannot tell tested code from untested code, so every test-related action says “unknown”.
- line coverage
- Unknown, no report
Small effort
Use bevyengine/bevy in your agent
Point Claude Code, Cursor, Codex or VS Code at this repository. Your agent gets the index this page is built from: cited answers, callers, history and health for any file.
https://api.repowise.dev/mcp/bevyengine/bevyOne command, run anywhere. Adds the server to your local Claude Code config.
Docsclaude mcp add --transport http repowise https://api.repowise.dev/mcp/bevyengine/bevy \ --header "Authorization: Bearer rw_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
This repo is public, so anyone with a Repowise account and an API key can connect.
Try asking
- get_overview()
- get_answer("how is bevy put together?")
- get_why("why is bevy structured this way?")
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Go deeper
- OverviewEverything the index found, what changed this week, commits and decisions.
- DocumentationModule-by-module documentation, 3,596 pages, 104 written by a model.
- ArchitectureDependency graph, layers and third-party dependencies.
- Code healthEvery file's score, the findings behind it, tests and refactoring plans.
- CommitsEach commit's effect on code health, with agent provenance.
- ContributorsWho owns what, and where one person holds most of the knowledge.
- DecisionsArchitectural decisions mined from commits and pull requests.
- Ask this codebaseSign inGrounded answers over the indexed code.
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https://api.repowise.dev/mcp/bevyengine/bevyFor maintainers
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[](https://repowise.dev/repo/bevyengine/bevy?src=badge_wiki)Code health badge
The repo's health score out of 10, from the latest index.
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[](https://repowise.dev/repo/bevyengine/bevy?src=badge_card)How bevyengine/bevy works
A refreshingly simple data-driven game engine built in Rust This page is a map of the bevyengine/bevy repository, written primarily in Rust, rebuilt from the source each time it is indexed. Repowise parses every symbol, computes a dependency graph, scores per-file code health from complexity, duplication, test coverage and churn, mines git history for hotspots and ownership, and lifts the architectural decisions into documentation you can read here or query through MCP.
The codebase has 2,209 files and 59,265 symbols in 9 modules, led by Rust, Shell and Java. Code health is 6.7 out of 10, rated fair.
Use the links above to open each view, or connect this repository to your agent for grounded answers inside Claude, Cursor, Codex or VS Code.