What is apply-conventions?

A set of PlayCanvas coding conventions for positions, rotations, cameras, physics, materials, models, bounds, and imports. PlayCanvas is a browser game engine with its own coordinate system and APIs.

Use it when writing or reviewing Engine code that moves entities, aims cameras, handles physics, imports models, sets rotations, or works with world and local transforms.

It prevents common mistakes such as using the wrong axis, rotating models incorrectly, mishandling angle wraparound, or applying transforms to the wrong parent.

apply-conventions — Skill for Claude Code and Codex by playcanvas

Install

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.

Any agent

npx skills add playcanvas/create-playcanvas --skill apply-conventions

Clone the repo

git clone --depth 1 https://github.com/playcanvas/create-playcanvas

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/playcanvas/create-playcanvas/apply-conventions/github.svg)](https://agentmods.dev/skills/playcanvas/create-playcanvas/apply-conventions)

Your own site

<a href="https://agentmods.dev/skills/playcanvas/create-playcanvas/apply-conventions"><img src="https://agentmods.dev/badge/skills/playcanvas/create-playcanvas/apply-conventions/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/playcanvas/create-playcanvas/apply-conventions"><img src="https://agentmods.dev/badge/skills/playcanvas/create-playcanvas/apply-conventions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 539 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

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	$0.00036	$0.00539
Opus 5.5	$0.00014	$0.00216
Sonnet 5.5	$0.00007	$0.00108
Haiku 4.5	$0.00004	$0.00054

Measured 23d ago against content hash 7e00be4c6177, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

apply-conventions 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 23d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

apply-conventions — 100% identical, 0 lines differ

skills/apply-conventions/SKILL.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Engine conventions

Check version-sensitive APIs against installed playcanvas declarations.

Coordinates

Right-handed, +Y up, metres. entity.forward, cameras, and lookAt use -Z.
Directional and spot lights shine along local -Y, straight down by default. Aim them with setEulerAngles, not lookAt.
glTF models usually face +Z; record per-model yaw with calibrate-model.
Angle APIs take degrees in XYZ order. Keep pitch, yaw, and roll as app state; never feed getEulerAngles() back into setEulerAngles(). Interpolate with math.lerpAngle or Quat.slerp.
Use world setters on semantic roots and setLocal* below a parent. Never scale rigid-body roots or skinned bones.

Current APIs

render and anim components, not model and animation.
ESM class X extends Script with static scriptName, not createScript.
Mesh.fromGeometry(device, new BoxGeometry()), not createBox and the other create* helpers.
Named imports from playcanvas; shipped scripts only from playcanvas/scripts/esm/**.

Cameras

FOV is vertical, 45° by default. Check shipped camera scripts before writing controls (reuse-scripts).

Materials and bounds

StandardMaterial.useMetalness defaults to false; enable it before using metalness.
Call material.update() after property edits. Per-mesh values use meshInstance.setParameter() with no update or clone.
Clone shared materials, including imported ones, before editing them for some meshes.
setParameter uploads raw values; convert sRGB colours with Color#linear().
Back faces cull by default; counter-clockwise winding is the front face.
Entities have no aabb; union descendant meshInstance.aabb. If mesh.update() skips bounds, set mesh.aabb yourself, and expand it by any vertex-shader displacement.

Verify in the running app

Offline values cannot prove facing, poses, or placement. Read values from the running app with inspect-runtime, and judge visuals only from screenshots you have inspected. A saved file path is not evidence.

Read the full file on GitHub · 50 lines

Changes

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.

23d ago Changed 7e00be4c6177
24d ago Changed · -26 lines · -4 tokens per session 8c51b0d8ec86
26d ago Changed 82cec6700d79
1mo ago First seen · 76 lines · 40 tokens per session scan A df464d24380a

Subscribe to this mod's changes

apply-conventions is a skill published in the GitHub repository playcanvas/create-playcanvas (61 stars, last pushed today), licensed MIT. It adds 36 tokens to every session and 539 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

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apply-conventions