---

name: unity-ui description: Create and lay out Unity UGUI screens

Before calling any skill in this module: if you are about to call a skill with parameters guessed from its name or description, STOP — read this file (or fetch its schema via GET /skills/recommend?includeSchema=true) first. If you already have the parameter definitions from recommend/schema, you may proceed straight to dryRun.

Triggers

• Building UGUI screens
• Adding Canvas elements
• Arranging UI layout
• 搭建 UGUI 界面、添加 Canvas 元素、排布 UI 布局

Unity UI Skills

Use this module for Unity UGUI / Canvas workflows. It is separate from UI Toolkit.

Batch-first: Prefer ui_create_batch when creating 2+ UI elements.

Operating Mode

• Approval：查询类 skill（ui_find_all，源码标 SkillMode.SemiAuto）直接执行；其余创建/修改类（ui_create_* / ui_set_* / ui_add_* / ui_layout_children / ui_align_selected 等，标 SkillMode.FullAuto）需用户 grant，grant 后服务端一步执行返结果。
• Auto / Bypass：所有 skill 直接执行；Auto 走 AI 自我评估，Bypass 全放行。
• 本模块不含 Delete / PlayMode / Reload / 高危 skill，无 Bypass-only 拦截项。删除 UI 节点请走 gameobject 模块。

DO NOT (common hallucinations):

• ui_add_canvas does not exist -> use ui_create_canvas
• ui_create_label does not exist -> use ui_create_text
• ui_create_checkbox does not exist -> use ui_create_toggle
• ui_set_color does not exist -> use component_set_property on Image/Text, or the dedicated UI property skills when available
• Do not confuse UGUI (ui) with UI Toolkit (uitoolkit)

Routing:

• For UXML/USS/UIDocument -> use uitoolkit
• For XR-compatible world-space Canvas conversion -> use xr_setup_ui_canvas
• For text updates after creation -> use ui_set_text
• For layout and alignment -> use ui_layout_children, ui_align_selected, ui_distribute_selected

Skills

Create Skills

Skill	Use	Key parameters
ui_create_canvas	Create Canvas	name?, renderMode?
ui_create_panel	Create panel container	name?, parent?, r/g/b/a?
ui_create_button	Create button	name?, parent?, text?, width/height?
ui_create_text	Create text label	name?, parent?, text?, fontSize?, r/g/b?
ui_create_image	Create image	name?, parent?, spritePath?, width/height?
ui_create_inputfield	Create input field	name?, parent?, placeholder?, width/height?
ui_create_slider	Create slider	name?, parent?, minValue?, maxValue?, value?
ui_create_toggle	Create toggle	name?, parent?, label?, isOn?
ui_create_dropdown	Create dropdown	name?, parent?, options?, width/height?
ui_create_scrollview	Create ScrollRect hierarchy	name?, parent?, width/height?, horizontal?, vertical?
ui_create_rawimage	Create RawImage	name?, parent?, texturePath?, width/height?
ui_create_scrollbar	Create scrollbar	name?, parent?, direction?, value?, size?
ui_create_batch	Create multiple UI elements	items (JSON string array)

Query and Layout Skills

Skill	Use	Key parameters
ui_find_all	Find scene UI elements	uiType?, limit?
ui_set_text	Update text content	name, text
ui_set_rect	Set RectTransform size/offsets	target, width, height, posX, posY, left/right/top/bottom?
ui_get_rect_transform	Read full RectTransform data	target
ui_set_rect_transform	Set full RectTransform data	anchors, pivot, offsets, local transform, width/height
ui_set_rect_transform_batch	Set full RectTransform data for multiple elements	items
ui_set_anchor	Apply anchor preset	target, preset?, setPivot?
ui_layout_children	Vertical/Horizontal/Grid layout	target, layoutType?, spacing?
ui_align_selected	Align current selection	alignment?
ui_distribute_selected	Distribute current selection	direction?

Property and Effect Skills

Skill	Use	Key parameters
ui_set_image	Image type/fill/sprite	target, type?, fillMethod?, fillAmount?, spritePath?
ui_add_layout_element	Add LayoutElement constraints	target, width/height prefs, flex values
ui_add_canvas_group	Add CanvasGroup	target, alpha?, interactable?, blocksRaycasts?
ui_add_mask	Add Mask or RectMask2D	target, maskType?, showMaskGraphic?
ui_add_outline	Add Shadow/Outline effect	target, effectType?, r/g/b/a?, distanceX/Y?
ui_configure_selectable	Configure transitions/navigation/colors	target, transition?, navigationMode?, color values

High-Frequency Defaults

Canvas and Parenting

• ui_create_canvas defaults to ScreenSpaceOverlay.
• Most create skills accept parent; if omitted, Unity will create under the active Canvas or scene root depending on the implementation context.
• For reusable menu groups, create the Canvas once, then create a Panel and put all child controls under that panel.

Common Create Parameters

Skill	High-frequency fields
ui_create_button	text, width, height
ui_create_text	text, fontSize, r/g/b
ui_create_image	spritePath, width, height
ui_create_slider	minValue, maxValue, value
ui_create_toggle	label, isOn
ui_create_dropdown	options
ui_create_scrollview	horizontal, vertical, movementType

Important:

• Most create skills do not take explicit x/y placement.
• Create first, then place/anchor with ui_set_rect, ui_set_anchor, or ui_layout_children.

Full RectTransform Editing

Use ui_set_rect_transform when you need Inspector-level RectTransform coverage instead of a preset.

Skill	Parameters
ui_get_rect_transform	name, instanceId, path
ui_set_rect_transform	target + anchorMinX/Y, anchorMaxX/Y, pivotX/Y, anchoredPosX/Y/Z, sizeDeltaX/Y, offsetMinX/Y, offsetMaxX/Y, localPosX/Y/Z, localRotX/Y/Z, localScaleX/Y/Z, width, height
ui_set_rect_transform_batch	items JSON array with the same per-target fields

ui_get_rect_transform

Get full RectTransform data for a UI element.

Parameter	Type	Required	Default	Description
name	string	No*	null	GameObject name
instanceId	int	No*	0	GameObject instance ID
path	string	No*	null	Hierarchy path

Returns: { success, name, instanceId, path, anchorMin, anchorMax, pivot, anchoredPosition3D, sizeDelta, offsetMin, offsetMax, localPosition, localEulerAngles, localScale, rect }

ui_set_rect_transform

Set full RectTransform data for a UI element.

Parameter	Type	Required	Default	Description
name	string	No*	null	GameObject name
instanceId	int	No*	0	GameObject instance ID
path	string	No*	null	Hierarchy path
anchorMinX / anchorMinY	float	No	null	Anchor min
anchorMaxX / anchorMaxY	float	No	null	Anchor max
pivotX / pivotY	float	No	null	Pivot
anchoredPosX / anchoredPosY / anchoredPosZ	float	No	null	Anchored position 3D
sizeDeltaX / sizeDeltaY	float	No	null	Size delta
offsetMinX / offsetMinY	float	No	null	Offset min
offsetMaxX / offsetMaxY	float	No	null	Offset max
localPosX / localPosY / localPosZ	float	No	null	Local position
localRotX / localRotY / localRotZ	float	No	null	Local euler rotation
localScaleX / localScaleY / localScaleZ	float	No	null	Local scale
width / height	float	No	null	Size with current anchors

Returns: same shape as ui_get_rect_transform.

ui_set_rect_transform_batch

Set full RectTransform data for multiple UI elements.

Parameter	Type	Required	Default	Description
items	json string	Yes	-	JSON array of per-item target and RectTransform fields

Returns: { success, totalItems, successCount, failCount, results }

Layout and Anchoring Rules

• ui_set_anchor is the fastest way to move a control into a standard layout position.
• ui_set_rect is better for precise size/offset edits after anchoring.
• ui_layout_children is preferred over hand-positioning every child when building vertical, horizontal, or grid menus.

Anchor presets commonly used in production:

• MiddleCenter for modal/menu panels
• TopLeft or TopRight for HUD corners
• StretchAll for full-screen backgrounds

TextMeshPro Note

Text creation auto-detects TMP:

• TMP available -> TextMeshProUGUI
• TMP unavailable -> legacy Text

Read the response payload if you need to know which one was created before later component-specific edits.

Workflow Notes

1. Create a Canvas first.
2. Use panels to group related controls.
3. Prefer ui_create_batch for menus, HUD groups, and repeated widgets.
4. Use anchors and layout groups before hand-placing every child.
5. Text creation auto-detects TextMeshPro. Responses indicate whether TMP was used.
6. For world-space gameplay UI, build the Canvas here first, then convert for XR only if needed.
7. ui_create_batch is mainly for bulk creation, not precise positioning. Follow it with layout or rect/anchor adjustments.
8. ui_create_batch.items is a JSON string parameter in the current REST/API layer, not a raw array object.

Minimal Example

import unity_skills
import json

unity_skills.call_skill("ui_create_canvas", name="MainMenu")
unity_skills.call_skill("ui_create_panel", name="MenuPanel", parent="MainMenu", a=0.7)
unity_skills.call_skill("ui_set_rect", name="MenuPanel", width=320, height=240)
unity_skills.call_skill("ui_create_batch", items=json.dumps([
    {"type": "Button", "name": "StartBtn", "parent": "MenuPanel", "text": "Start", "width": 220, "height": 44},
    {"type": "Button", "name": "OptionsBtn", "parent": "MenuPanel", "text": "Options", "width": 220, "height": 44},
    {"type": "Button", "name": "QuitBtn", "parent": "MenuPanel", "text": "Quit", "width": 220, "height": 44}
]))

unity_skills.call_skill("ui_set_anchor", name="MenuPanel", preset="MiddleCenter")
unity_skills.call_skill("ui_layout_children", name="MenuPanel", layoutType="Vertical", spacing=12)

Exact Signatures

Exact names, parameters, defaults, and returns are defined by GET /skills/schema or unity_skills.get_skill_schema(), not by this file. Load UI_REFERENCE.md for extended element creation details, property tables, and larger UGUI examples.

Common Errors

Full transport-level codes (COMPILING/RATE_LIMIT etc.) → ../../references/protocol-error-codes.md

Error	Trigger	Fix
TARGET_NOT_FOUND	The parent GameObject, UI element, RectTransform, Text/Image/Selectable component, or sprite asset could not be found.	Use ui_find_all, gameobject_find, or scene_get_hierarchy to locate the element, and verify sprite paths with asset_find.
SEMANTIC_INVALID	An invalid value was supplied, such as an unknown anchor preset, layout type, alignment, or name/path with separators.	Choose a valid preset/type from the error context (e.g., MiddleCenter, Vertical, TopLeft) and retry.
SKILL_ERROR	A selection-based operation failed because fewer than the required number of UI elements were selected (e.g., Select at least 2 UI elements).	Select the required UI elements in the Hierarchy before calling alignment/distribution skills.