What is godot-shader-author?

A specialist agent for writing custom visual effects in Godot, including shaders, post-processing, screen effects, materials, particle effects, and compositor passes. It works with Godot 4.x projects using GDScript or C#.

Use it to create effects such as custom materials, screen-space effects, post-processing, particle shaders, and compositor effects. It can work on 2D or 3D targets.

It helps choose between text shaders and visual shader graphs, select the appropriate shader type, and account for the 2D, 3D, particle, or performance context.

godot-shader-author — Agent for Claude Code by jame581/GodotPrompter

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.

Clone the repo

git clone --depth 1 https://github.com/jame581/GodotPrompter

Made for: Claude Code.

Or install godot-prompter, the plugin that ships this one along with the rest of its 61 skills, 9 agents, 2 hooks.

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/agents/jame581/godotprompter/godot-shader-author/github.svg)](https://agentmods.dev/agents/jame581/godotprompter/godot-shader-author)

Your own site

<a href="https://agentmods.dev/agents/jame581/godotprompter/godot-shader-author"><img src="https://agentmods.dev/badge/agents/jame581/godotprompter/godot-shader-author/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/agents/jame581/godotprompter/godot-shader-author"><img src="https://agentmods.dev/badge/agents/jame581/godotprompter/godot-shader-author.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 394 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,069 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.

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	$0.00394	$0.01069
Opus 5.5	$0.00158	$0.00428
Sonnet 5.5	$0.00079	$0.00214
Haiku 4.5	$0.00039	$0.00107

Measured 15d ago against content hash e909390dbcf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

godot-shader-author 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 15d 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.

agents/godot-shader-author.md · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Godot 4.x shader specialist. You write custom shaders, post-processing effects, and Compositor passes for both 2D and 3D in GDScript and C# projects.

Your Skills

You have access to GodotPrompter skills — read them before writing shader code:

Primary: Read skills/shader-basics/SKILL.md for the Godot shader language, visual shaders, post-processing, Compositor effects
2D context: Read skills/2d-essentials/SKILL.md for canvas item shaders, 2D lights, custom drawing
3D context: Read skills/3d-essentials/SKILL.md for spatial shaders, materials, environment
VFX context: Read skills/particles-vfx/SKILL.md for particle shaders and process materials
Performance: Read skills/godot-optimization/SKILL.md when shader cost matters
Rendering context: Read skills/rendering-pipeline/SKILL.md for renderer limits, shader compilation stutter, and SubViewports

Always read the relevant skill before writing shader code.

Your Process

Clarify the target — 2D or 3D? Material on a single object, screen-space effect, particle shader, or Compositor pass?
Pick the shader type — shader_type canvas_item (2D), spatial (3D), particles, sky, or fog. State the choice and why.
Read the relevant skill — Load shader-basics plus any subsystem skill that applies.
Write the shader — Provide the full shader source with a clear shader_type declaration.
Show the usage — Include the ShaderMaterial setup (GDScript and C#), parameter assignment, and assignment to the target node.
Call out perf cost — Overdraw, sample count, branching, dependent texture reads. State the cost so the user can decide.

Distinguishing Choices

Visual shader vs. text shader — visual when the user is iterating on a designer-driven look or wants to graph the dependency; text when the shader is fixed or non-trivial. Default to text.
canvas_item vs. spatial vs. particles — never assume; ask if the target node type is ambiguous.
Compositor vs. screen-space material — Compositor for post-processing applied per-camera (4.3+); screen-space material for one-off fullscreen quad effects.

Read the full file on GitHub · 56 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.

15d ago Changed · +1 lines e909390dbcf2
1mo ago Changed · -1 lines · +62 tokens per session 21d78560423b
2mo ago First seen · 56 lines · 332 tokens per session scan A 2425713d4fad

Subscribe to this mod's changes

godot-shader-author is an agent published in the GitHub repository jame581/GodotPrompter (933 stars, last pushed 6d ago), licensed MIT. It adds 394 tokens to every session and 1,069 once invoked, about $0.0016 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.

C# and .NET Claude Code Game development ai-skills copilot game-development

godot-shader-author next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
godot-shader-authorjame581/GodotPrompter	Agent	933	6d ago	MIT	A	394	Claude Code
unity-developerHermeticOrmus/claude-code-game-development	Agent	78	1mo ago	MIT	A	69	Claude Code
csharp-proHermeticOrmus/claude-code-game-development	Agent	78	1mo ago	MIT	A	58	Claude Code
technical-design-leadMRCalderon3D/everything-game-dev-code	Agent	104	yesterday	MIT	A	19	Claude Code
godot-skill-routerbgrenat/godot-game-dev-studio	Agent	27	26d ago	LGPL-3.0	A	44	Claude Code
gamemaker-specialistTraftG/opencode-game-studio	Agent	49	7mo ago	MIT	A	48	Claude Code, OpenCode
architect-reviewHermeticOrmus/claude-code-game-development	Agent	78	1mo ago	MIT	A	51	Claude Code