Agent skill

Bevy Events

Reference for events, messages, and observers in Bevy — Message/MessageReader/MessageWriter, Event/EntityEvent, triggers, observers, and propagation.

MITAuto-check passed

Install Bevy Events

skills CLI

$ npx skills add nolantait/bevy-starter --skill bevy-events -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install nolantait/bevy-starter bevy-events --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/nolantait/bevy-starter.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/bevy-events .claude/skills/bevy-events && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "bevy-events" agent skill from https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events into .claude/skills/bevy-events/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bevy-events", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add nolantait/bevy-starter --skill bevy-events -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install nolantait/bevy-starter bevy-events --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nolantait/bevy-starter.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/bevy-events .agents/skills/bevy-events && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "bevy-events" agent skill from https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events into .agents/skills/bevy-events/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bevy-events", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nolantait/bevy-starter --skill bevy-events -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install nolantait/bevy-starter bevy-events --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nolantait/bevy-starter.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/bevy-events .cursor/skills/bevy-events && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "bevy-events" agent skill from https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events into .cursor/skills/bevy-events/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bevy-events", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/nolantait/bevy-starter.git --path .agents/skills/bevy-events

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add nolantait/bevy-starter --skill bevy-events -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install nolantait/bevy-starter bevy-events --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nolantait/bevy-starter.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/bevy-events .gemini/skills/bevy-events && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "bevy-events" agent skill from https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events into .gemini/skills/bevy-events/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bevy-events", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install nolantait/bevy-starter bevy-events

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add nolantait/bevy-starter --skill bevy-events -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/nolantait/bevy-starter.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/bevy-events .github/skills/bevy-events && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "bevy-events" agent skill from https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events into .github/skills/bevy-events/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bevy-events", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nolantait/bevy-starter --skill bevy-events -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install nolantait/bevy-starter bevy-events --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nolantait/bevy-starter.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/bevy-events .opencode/skills/bevy-events && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "bevy-events" agent skill from https://github.com/nolantait/bevy-starter/tree/master/.agents/skills/bevy-events into .opencode/skills/bevy-events/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bevy-events", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: bevy-events
GitHub stars: 132
Token cost: ~867 tokens
SKILL.md length: 257 words
Files: 1
Skills in repo: 24
Repo updated: Oct 8, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Reference for events, messages, and observers in Bevy — Message/MessageReader/MessageWriter, Event/EntityEvent, triggers, observers, and propagation.

Works in 2 steps: Message — buffered queue, consumed next… → Event / EntityEvent — immediate…
SKILL.md covers Two kinds of events, Messages (buffered, delayed by…, Events (immediate observers) and Event propagation, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Bevy Events is an agent skill from nolantait/bevy-starter. Reference for events, messages, and observers in Bevy — Message/MessageReader/MessageWriter, Event/EntityEvent, triggers, observers, and propagation.

Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: A minimalist starter for bevy and rust. The licence is MIT.

Example prompts

“/bevy-events”

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

Message — buffered queue, consumed next frame, good for frequent events
Event / EntityEvent — immediate observers, good for infrequent events with entity scope

What it can do on your machine

Read from SKILL.md and the folder at commit dd6f56b. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are rust).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Bevy Events loads about 867 tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 257 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~40
When it runs · the whole SKILL.md, loaded when a task matches: ~867

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from nolantait/bevy-starter at commit dd6f56b, republished under its MIT licence (© nolantait). 257 words, ~867 tokens.

Download SKILL.mdSave it as .claude/skills/bevy-events/SKILL.md (or your agent's skills folder).

name: bevy-events
description: Reference for events, messages, and observers in Bevy — Message/MessageReader/MessageWriter, Event/EntityEvent, triggers, observers, and propagation.
metadata.crate: bevy_ecs
metadata.bevy: 0.19

Two kinds of events

Message — buffered queue, consumed next frame, good for frequent events
Event / EntityEvent — immediate observers, good for infrequent events with entity scope

Messages (buffered, delayed by 1 frame)

Defining

rust

#[derive(Message)]
struct PlayerDetected(Entity);

Registering

rust

app.add_message::<PlayerDetected>();
app.add_message::<PlayerKilled>();

Writing

rust

fn detect(mut messages: MessageWriter<PlayerDetected>) {
  messages.write(PlayerDetected(entity));
}

Reading

rust

fn react(mut messages: MessageReader<PlayerDetected>) {
  for msg in messages.read() { }
}

Messages are double-buffered — systems see messages from the current and previous frame. Unconsumed messages are cleaned up and dropped silently after two updates. To skip a system entirely when there are no new messages, use PopulatedMessageReader<T> or the on_message::<T> run condition.

Events (immediate observers)

Defining

Event — global event, defined with a GlobalTrigger
EntityEvent — entity-scoped event, defined with an EntityTrigger, or with a PropagateEntityTrigger when propagation is enabled

rust

#[derive(Event)]
struct GameStarted;

#[derive(EntityEvent)]
struct BossKilled { entity: Entity }

Broadcast observer

rust

fn on_respawn(event: On<Add, Enemy>, query: Query<(&Enemy, &Position)>) {
  let (enemy, pos) = query.get(event.entity).unwrap();
}

app.add_observer(on_respawn);

Entity observer

rust

fn on_boss_killed(event: On<BossKilled>, query: Query<&Enemy>) {
  let enemy = query.get(event.entity).unwrap();
}

let entity = commands.spawn(Enemy).observe(on_boss_killed).id();
commands.trigger(BossKilled { entity });

Triggering

rust

commands.trigger(SomeEvent);
commands.trigger(SomeEntityEvent { entity });

Built-in lifecycle events

Event	Triggers when
`On<Add, T>`	Component T is added
`On<Insert, T>`	Component T is inserted
`On<Replace, T>`	Component T is replaced
`On<Remove, T>`	Component T is removed
`On<Despawn, T>`	Component T is despawned

The second generic B in On<E, B> acts as OR filter: On<Add, (Enemy, Person)> triggers when either Enemy or Person is added.

Event propagation

Propagation is opt-in. With auto_propagate it happens automatically; otherwise an observer must call On::propagate(true). The traversal defaults to ChildOf (child to parent) and can be changed with propagate = &'static SomeRelationship.

rust

#[derive(EntityEvent)]
#[entity_event(auto_propagate, propagate = &'static ChildOf)]
struct LocationTravelled {
  #[event_target]
  entity: Entity,
}

An EntityEvent with propagation enabled bubbles up its hierarchy, stopping when the chain ends or an observer manually stops it.

Choosing messages vs events

	Events	Messages
Frequency	Infrequent	Frequent
Latency	Immediate with `World::trigger`; next sync point with `Commands::trigger`	Up to 1 frame
Scope	World or Entity	World
Ordering	No explicit order	Ordered
Coupling	High	Low
Propagation	Bubbling	None

Files

Just SKILL.md in .agents/skills/bevy-events of nolantait/bevy-starter.

Open the folder on GitHubat commit dd6f56b

Compare with similar skills

Bevy Events next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Bevy Events compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Bevy Events this skillnolantait/bevy-starter	132	—	~867	Automated safety check: Pass	MIT	2 days ago
Messages Opsaffaan-m/ECC	277k	1 repos	~724	Automated safety check: Pass	MIT	today
Eventscoreyhaines31/marketingskills	54k	—	~3k	Automated safety check: Pass	MIT	2 days ago
Langsmith ObservabilityOrchestra-Research/AI-Research-SKILLs	13k	2 repos	~2.4k	Automated safety check: Pass	MIT	3 mo ago
ObservabilityBuilderIO/agent-native	7.1k	—	~7.3k	Automated safety check: Pass	None	yesterday
Frontend Observabilitysickn33/agentic-awesome-skills	47k	1 repos	~5.1k	Automated safety check: Pass	MIT	2 days ago

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Questions about Bevy Events

What does Bevy Events do?

Reference for events, messages, and observers in Bevy — Message/MessageReader/MessageWriter, Event/EntityEvent, triggers, observers, and propagation. Bevy Events is an agent skill from nolantait/bevy-starter. Reference for events, messages, and observers in Bevy — Message/MessageReader/MessageWriter, Event/EntityEvent, triggers, observers, and propagation.

How do I install Bevy Events in Claude Code?

Run `npx skills add nolantait/bevy-starter --skill bevy-events -a claude-code`. Or copy the skill folder (.agents/skills/bevy-events in nolantait/bevy-starter) into .claude/skills/bevy-events in your project. Claude Code loads it when a task matches its description.

How do I install Bevy Events in Codex?

Run `npx skills add nolantait/bevy-starter --skill bevy-events -a codex`. Or copy the skill folder (.agents/skills/bevy-events in nolantait/bevy-starter) into .agents/skills/bevy-events in your project. Codex loads it when a task matches its description.

Can I use Bevy Events in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add nolantait/bevy-starter --skill bevy-events -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/bevy-events, .gemini/skills/bevy-events, .github/skills/bevy-events and .opencode/skills/bevy-events in your project.

What does Bevy Events need to run?

SKILL.md names no scripts, command-line tools or credentials: Bevy Events is instructions for the agent only.

Does Bevy Events access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Bevy Events safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Bevy Events use?

Bevy Events is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Bevy Events use?

About 867 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Bevy Events?

Skills that share tags, products or a category with Bevy Events: Messages Ops (affaan-m/ECC, 277k stars), Events (coreyhaines31/marketingskills, 54k stars), Langsmith Observability (Orchestra-Research/AI-Research-SKILLs, 13k stars) and Observability (BuilderIO/agent-native, 7.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Bevy Events?

nolantait (a GitHub user) maintains it in nolantait/bevy-starter, which has 132 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on October 8, 2026.

Source: nolantait/bevy-starter on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Bevy Events

Facts

At a glance

What it does

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Two kinds of events

Messages (buffered, delayed by 1 frame)

Defining

Registering

Writing

Reading

Events (immediate observers)

Defining

Broadcast observer

Entity observer

Triggering

Built-in lifecycle events

Event propagation

Choosing messages vs events

Files

Compare with similar skills

Similar skills

More from nolantait/bevy-starter

Questions about Bevy Events