script-update-or-create

name	script-update-or-create
description	Write a `.cs` script file (create or overwrite) with the provided C# code. Validates syntax via Roslyn before write — invalid code is rejected with error details and the file is left untouched. Refreshes the AssetDatabase and delivers the final result via `requestId` after Unity finishes the triggered compilation. Use 'script-read' to inspect existing content first.

Script / Update or Create

Updates or creates script file with the provided C# code. Does AssetDatabase.Refresh() at the end. Provides compilation error details if the code has syntax errors. Use 'script-read' tool to read existing script files first.

Inputs

• filePath — required .cs path.
• content — C# source. MUST pass ScriptUtils.IsValidCSharpSyntax.
• requestId — required for the processing/delivered-later contract.

Behavior

Creates any missing parent directories, writes the file, then calls AssetDatabase.Refresh and schedules a post-compilation notification so the final response is delivered after Unity finishes the recompile.

How to Call

unity-mcp-cli run-tool script-update-or-create --input '{
  "filePath": "string_value",
  "content": "string_value"
}'

For complex input (multi-line strings, code), save the JSON to a file and use:

unity-mcp-cli run-tool script-update-or-create --input-file args.json

Or pipe via stdin (recommended):

unity-mcp-cli run-tool script-update-or-create --input-file - <<'EOF'
{"param": "value"}
EOF

Troubleshooting

If unity-mcp-cli is not found, either install it globally (npm install -g unity-mcp-cli) or use npx unity-mcp-cli instead. Read the /unity-initial-setup skill for detailed installation instructions.

Input

Name	Type	Required	Description
filePath	string	Yes	The path to the file. Sample: "Assets/Scripts/MyScript.cs".
content	string	Yes	C# code - content of the file.

Input JSON Schema

{
  "type": "object",
  "properties": {
    "filePath": {
      "type": "string"
    },
    "content": {
      "type": "string"
    }
  },
  "required": [
    "filePath",
    "content"
  ]
}

Output

This tool does not return structured output.