/shader

name: unity-shader
description: Manage HLSL/ShaderLab .shader files. 管理 HLSL/ShaderLab .shader 文件。

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 |

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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.

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

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

`shader_get_variant_count`

Get shader variant count for performance analysis.

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

**Returns:** `{ shaderName, subshaderCount, totalPasses }