Triggers

Creating or editing handwritten shaders
Listing or finding .shader files
Inspecting properties/keywords
创建或编辑手写 shader、列出/查找 .shader 文件、检查属性与关键字

Unity Shader Skills

Work with .shader HLSL/ShaderLab files (create from templates, read source, list, find, get keywords/properties/variants, check errors, delete, toggle global keywords). For node-based ShaderGraph use the shadergraph module.

Operating Mode

Query skills (shader_read, shader_list, shader_find, shader_get_properties, shader_check_errors, shader_get_keywords, shader_get_variant_count) are SkillMode.SemiAuto — they run in all three modes without grant.
Mutating skills (shader_create, shader_create_urp, shader_set_global_keyword) are SkillMode.FullAuto — under Approval they need user grant (grant triggers one server-side execute returning the result); under Auto / Bypass they execute directly.
shader_delete carries SkillOperation.Delete and is auto-forbidden in Approval / Auto modes (NeverInSemi). Only Bypass or the user-managed Allowlist can run it.

Guardrails

DO NOT (common hallucinations):

shader_set_property does not exist → use material_set_float/material_set_color/etc. on the material, not the shader
shader_apply / shader_assign do not exist → use material_set_shader to change a material's shader
shader_get_properties returns shader property definitions (name/type/range), not current values → for material instance values use material_get_properties
Shader names are case-sensitive and path-like: "Standard", "Universal Render Pipeline/Lit", not "standard" or "URP Lit"

Routing:

For material property changes → use material module
For shader keyword control → material_set_keyword (material module)
For global shader keywords → shader_set_global_keyword (this module)

Skills Overview

| Skill | Description | |-------|-------------| | shader_create | Create shader file | | shader_read | Read shader source | | shader_list | List all shaders | | shader_find | Find shader by name | | shader_delete | Delete shader file | | shader_get_properties | Get shader properties | | shader_check_errors | Check shader for compilation errors | | shader_get_keywords | Get shader keyword list | | shader_get_variant_count | Get shader variant count for performance analysis | | shader_create_urp | Create a URP shader from template | | shader_set_global_keyword | Enable or disable a global shader keyword |

Skills

shader_create

Create a shader file. The template parameter is raw shader source code that gets written verbatim into the .shader file — it is not a preset name. If you pass template="Standard" the literal string Standard will be written to disk and the shader will fail to compile.

| Parameter | Type | Required | Default | Description | |-----------|------|----------|---------|-------------| | shaderName | string | Yes | - | Shader name written into the Shader "..." declaration (e.g., "Custom/MyShader") | | savePath | string | Yes | - | Save path (e.g., "Assets/Shaders/My.shader") | | template | string | No | null | Full ShaderLab/HLSL source string. When omitted, a built-in Unlit template (_MainTex + _Color, single CGPROGRAM pass) is used. There are no other built-in presets. |

For a URP Unlit / Lit preset, use shader_create_urp (type: "Unlit" | "Lit") instead — it actually selects a template by name.

shader_read

Read shader source code.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | shaderPath | string | Yes | Shader asset path |

Returns: {path, lines, content}

shader_list

List all shaders in project.

| Parameter | Type | Required | Default | Description | |-----------|------|----------|---------|-------------| | filter | string | No | null | Name filter | | limit | int | No | 100 | Max results |

Returns: {count, shaders: [{path, name, propertyCount}]}

shader_find

Find a shader by name.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | searchName | string | Yes | Shader name to find |

Returns: {found, name, path}

shader_delete

Delete a shader file.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | shaderPath | string | Yes | Shader asset path |

shader_get_properties

Get all properties defined in a shader.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | shaderNameOrPath | string | Yes | Shader name or shader asset path |

Returns: {success, properties: [{name, type, description}]}

`shader_check_errors`

Check shader for compilation errors.

| Parameter | Type | Required | Default | Description | |-----------|------|----------|---------|-------------| | shaderNameOrPath | string | Yes | - | Shader name or asset path (e.g., "Custom/MyShader" or "Assets/Shaders/My.shader") |

Returns: { shaderName, hasErrors, messageCount }

`shader_get_keywords`

Get shader keyword list.

Returns: { shaderName, keywordCount, keywords: [{ name, type }] }

`shader_get_variant_count`

Get shader variant count for performance analysis.

Returns: { shaderName, subshaderCount, totalPasses }

`shader_create_urp`

Create a URP shader from template (type: Unlit or Lit).

| Parameter | Type | Required | Default | Description | |-----------|------|----------|---------|-------------| | shaderName | string | Yes | - | Shader name (e.g., "Custom/MyURPShader") | | savePath | string | Yes | - | Save path (e.g., "Assets/Shaders/MyURP.shader") | | type | string | No | "Unlit" | Template type: "Unlit" or "Lit" |

Returns: { success, shaderName, path, type }

`shader_set_global_keyword`

Enable or disable a global shader keyword.

| Parameter | Type | Required | Default | Description | |-----------|------|----------|---------|-------------| | keyword | string | Yes | - | Global shader keyword name | | enabled | bool | Yes | - | true to enable, false to disable |

Returns: { success, keyword, enabled }

Example Usage

import unity_skills

# Create an unlit shader
unity_skills.call_skill("shader_create",
    shaderName="Custom/MyUnlit",
    savePath="Assets/Shaders/MyUnlit.shader",
    template="Unlit"
)

# Create a surface shader
unity_skills.call_skill("shader_create",
    shaderName="Custom/MyPBR",
    savePath="Assets/Shaders/MyPBR.shader",
    template="Standard"
)

# Read shader source
source = unity_skills.call_skill("shader_read",
    shaderPath="Assets/Shaders/MyUnlit.shader"
)
print(source['content'])

# List all custom shaders
shaders = unity_skills.call_skill("shader_list", filter="Custom")
for shader in shaders['shaders']:
    print(f"{shader['name']}: {shader['path']}")

Best Practices

Use consistent shader naming (Category/Name)
Organize shaders in dedicated folder
Start with templates, modify as needed
Test shaders in different lighting conditions
Consider mobile compatibility for builds

Exact Signatures

Exact names, parameters, defaults, and returns are defined by GET /skills/schema or unity_skills.get_skill_schema(), not by this file.