Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add chrisgliddon/bevy-skills --skill bevy-migration-0-18-to-0-19git clone --depth 1 https://github.com/chrisgliddon/bevy-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/chrisgliddon/bevy-skills/bevy-migration-0-18-to-0-19)<a href="https://agentmods.dev/skills/chrisgliddon/bevy-skills/bevy-migration-0-18-to-0-19"><img src="https://agentmods.dev/badge/skills/chrisgliddon/bevy-skills/bevy-migration-0-18-to-0-19/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/chrisgliddon/bevy-skills/bevy-migration-0-18-to-0-19"><img src="https://agentmods.dev/badge/skills/chrisgliddon/bevy-skills/bevy-migration-0-18-to-0-19.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00093 | $0.01608 |
| Opus 5 | $0.00046 | $0.00804 |
| Sonnet 5 | $0.00019 | $0.00322 |
| Haiku 4.5 | $0.00009 | $0.00161 |
Grade A, and why
bevy-migration-0-18-to-0-19 scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Bevy 0.18 → 0.19 migration
Bevy 0.19.0 was released on 2026-06-19. Target bevy = "0.19" and validate
against the latest 0.19 patch release. Apply the official migration guide from top
to bottom; this skill prioritizes changes most likely to affect game code and sibling
skills.
First-pass checklist
- Update the engine and every Bevy ecosystem crate together. A crate built on Bevy 0.18 cannot share ECS/assets/render types with Bevy 0.19.
- Rebuild with the project's real
default-featuresand target triples. - Fix resources and broad-query conflicts before chasing secondary system errors.
- Update scenes, text, assets, rendering, lights, and UI focus.
- Regenerate persisted animation target IDs and serialized world data.
- Compile representative examples and exercise native and web/platform builds.
High-impact changes
| Bevy 0.18 | Bevy 0.19 |
|---|---|
#[derive(Component, Resource)] |
Split into distinct types; Resource: Component |
broad query plus Res<T> |
Filter resource entities with Without<IsResource> when appropriate |
init_non_send_resource |
init_non_send |
SceneRoot / DynamicScene |
WorldAssetRoot / DynamicWorld |
old world serialization in bevy_scene |
bevy_world_serialization |
TextFont { font: Handle<_>, font_size: f32 } |
FontSource and FontSize |
TextLayout::new_with_justify |
TextLayout::justify |
LoadContext::loader() |
LoadContext::load_builder() |
custom Reader with AsyncSeekForward |
required Reader::seekable() |
ViewNode and camera render-graph nodes |
systems in Core2d / Core3d schedules |
Replace, on_replace |
Discard, on_discard |
set_executor_kind(ExecutorKind::...) |
set_executor(...) with an executor instance |
light shadows_enabled |
shadow_maps_enabled plus optional contact_shadows_enabled |
Atmosphere on a camera |
separate bevy::light::Atmosphere entity |
public InputFocus.0 |
get, set, and clear methods |
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 149 lines · 93 tokens per session scan A e01cde015c33
bevy-migration-0-18-to-0-19 is a skill published in the GitHub repository chrisgliddon/bevy-skills (12 stars, last pushed 18d ago), licensed MIT. It adds 93 tokens to every session and 1,608 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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