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settings-permission-empty-pattern ​

Tool(pattern) syntax should not have empty patterns

Warning Configurable

Rule Details ​

This rule checks permission entries in settings.json and settings.local.json across the allow, deny, and ask arrays for the Tool(pattern) syntax and warns when the pattern inside the parentheses is empty. An empty pattern like Bash() is likely a mistake and should either include a glob pattern like Bash(npm test) or be simplified to just the tool name Bash. Empty patterns may cause unexpected permission matching behavior.

Incorrect ​

Permission with empty inline pattern

json
{
  "permissions": {
    "allow": [
      "Bash()",
      "Write()"
    ]
  }
}

Correct ​

Permission with a specific pattern

json
{
  "permissions": {
    "allow": [
      "Bash(npm test)",
      "Write(src/**)"
    ]
  }
}

Permission without inline pattern syntax

json
{
  "permissions": {
    "allow": [
      "Bash",
      "Write"
    ]
  }
}

How To Fix ​

Either add a meaningful pattern inside the parentheses (e.g., Bash(npm test)) or remove the parentheses entirely to use the bare tool name (e.g., Bash).

Options ​

Default options:

json
{
  "allowEmpty": false
}

Allow empty inline patterns:

json
{
  "allowEmpty": true
}

When Not To Use It ​

Disable this rule or set allowEmpty: true if your permission system intentionally uses empty patterns as a wildcard syntax.

Resources ​

Version ​

Available since: v0.2.0