bevy-save-load

使い方

インストールコマンドをコピーし、自分の環境へ導入する前にソースを確認します。
必要なツール、認証情報、対応環境を原文で確認します。
入力と成果物を指定し、出力を資料と照合します。

npx skills add https://github.com/thedivergentai/game-design-agentic-skills --skill bevy-save-load

開始前の確認

導入にはモデル契約、API枠、ファイルへのアクセス許可は含まれません。
スター数や導入数は活動の指標であり、独立した品質・安全性試験ではありません。

リポジトリの原文

見出し、例、コード、表、リンク、参照画像を含む原文を表示しています。

Bevy save and load

When to use

Load this when a design asks to persist player progress. Route asset and scene spawning to bevy-asset-scenes. Keep save bytes as data you serialize yourself until a current docs page names a format.

ECS shape

What exists: app-wide progress can be a Resource (see bevy-data-resources). Level content loads through AssetServer and may spawn with spawn_scene / queue_spawn_scene (bevy::scene, docs.rs latest, 0.20.0).
What was checked and rejected: https://docs.rs/bevy/latest/bevy/scene/struct.DynamicScene.html returned 404 on 2026-10-11. The live scene index documents Scene and bsn!, not a save-file serializer. Do not call DynamicScene::serialize from this skill.
Schedule: no save system is specified here. Do not invent a filesystem write inside Update.

Coming from Godot

Godot idea	Bevy idiom
Resource file for designer data	An asset `Handle`, or a `Resource` you own in code
Packed scene instance	`Scene` spawn on `bevy-asset-scenes`
Player save slot	Leave it as data you have not serialized yet. Check the docs before naming a slot format.

Scope

Check docs.rs latest for a save path, slot index, version field, or RON/JSON writer before writing one.
Scene spawn is not a save game. Do not treat bsn! as a user save.
Wasm has no general filesystem story on the docs pages for this skill. Do not invent one.

Expert Knowledge Delta

Target: Bevy 0.20+.

Core ECS types: Component, Resource, Query, Commands, Startup, Update, Fixed / FixedMain (bevy::time), .chain(), Plugin, DefaultPlugins, MinimalPlugins. Messages and observers are an ownership slot. See bevy-events-messaging for their APIs. Systems run in parallel unless .chain() orders the ones that conflict.

Who owns state

Piece	Owner	Who may mutate	Schedule
Data on one entity	`Component`	One system via `Query`	`Update` or `FixedMain`
One value for the whole app	`Resource`	One system	`Startup` to insert, then the schedule that reads it
Spawn	`Commands`	The spawning system	`Startup` for the initial world; later schedules for runtime spawn
Order that must not race	`.chain()`	The chained systems only	Same schedule
Plugin boundary	`Plugin`	`build` registers systems and resources	Before the app runs

Borrow rule: two systems that both mutably query the same component must be ordered (.chain()) or split so only one writes. Unrelated systems stay parallel. That is the ECS page rule, not a guess at a system-set API.

Decision

If you need	Do this	Do not
Per-entity data	`Component` + `Query`	A Godot node script
App-wide config or clock	`Resource`	Copy the value onto every entity
Stable simulation step	`FixedMain` and the `Fixed` clock	Tie simulation to raw frame `Update`
Startup spawn	`Commands` in `Startup`	Spawn from a render system
Cross-system notice that is not shared state	Message or observer slot in `bevy-events-messaging`	A new event type invented in this file
An API outside the documented set	Check the official docs first	A made-up crate or API

Load references/ecs-ownership.md for the ownership table.

NEVER

Do not pin /0.20.0/ in docs URLs. WHY: links stay on latest; the 0.20 target is stated once in prose.
Do not mutably query the same component from two unordered systems. WHY: the schedule runs systems in parallel unless .chain() orders them.
Do not invent a physics, navigation, networking, or XR crate here. WHY: this skill only names documented Bevy crates and modules.

No Godot Resource, FileAccess, or config-file types. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.
No DynamicScene or scene-file writer this file does not list. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.
No third-party save crates. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.

Reference

docs.rs links use the unversioned latest permalink. The library pin on bevy-master stays 0.20.0.

Official Documentation

Migration guides - Unversioned hop index.
bevy crate - Unversioned API index.
bevy::scene - Spawn API that is not a save format. DynamicScene struct URL 404.
bevy::asset - Disk assets, not player slots.
Resources - App-wide data that a future save would have to name.
Examples - Example tree on the latest branch.

Related Skills

Prerequisites

bevy-master - Who owns which piece of state.
bevy-data-resources - Resource versus Component.
bevy-asset-scenes - Loading content. Not a save slot.

Complements

godot-save-load-systems - Equivalent Godot skill.

Downstream / consumers

None until a save format is opened.

Master

bevy-master - Bevy router.

使い方