uloop-control-play-mode

Control Unity Editor play mode (play/stop/pause). Use when you need to: (1) Start play mode to test game behavior, (2) Stop play mode to return to edit mode, (3) Pause play mode for frame-by-frame inspection.

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Install this agent skill to your Project

npx add-skill https://github.com/hatayama/unity-cli-loop/tree/main/Packages/src/Editor/Api/McpTools/ControlPlayMode/Skill

SKILL.md

uloop control-play-mode

Control Unity Editor play mode (play/stop/pause).

Usage

bash

uloop control-play-mode [options]

Parameters

Parameter	Type	Default	Description
`--action`	string	`Play`	Action to perform: `Play`, `Stop`, `Pause`

Global Options

Option	Description
`--project-path <path>`	Target a specific Unity project (mutually exclusive with `--port`)
`-p, --port <port>`	Specify Unity TCP port directly (mutually exclusive with `--project-path`)

Examples

bash

# Start play mode
uloop control-play-mode --action Play

# Stop play mode
uloop control-play-mode --action Stop

# Pause play mode
uloop control-play-mode --action Pause

Output

Returns JSON with the current play mode state:

IsPlaying: Whether Unity is currently in play mode
IsPaused: Whether play mode is paused
Message: Description of the action performed

Notes

Play action starts the game in the Unity Editor (also resumes from pause)
Stop action exits play mode and returns to edit mode
Pause action pauses the game while remaining in play mode
Useful for automated testing workflows