Use Readonly
This skill sets a variable to "readonly," preventing accidental modification and ensuring consistent data throughout your workflow.
Install on your platform
We auto-selected Claude Code based on this skill’s supported platforms.
Run in terminal (recommended)
claude mcp add use-readonly npx -- -y @trustedskills/use-readonly
Or manually add to ~/.claude/settings.json
{
"mcpServers": {
"use-readonly": {
"command": "npx",
"args": [
"-y",
"@trustedskills/use-readonly"
]
}
}
}Requires Claude Code (claude CLI). Run claude --version to verify your install.
About This Skill
What it does
This skill enables the creation of readonly properties within TypeScript objects. It allows you to define object fields that cannot be modified after initialization, promoting immutability and data integrity. The skill leverages TypeScript's Readonly utility type to enforce this restriction at compile time.
When to use it
- Configuration Objects: When defining configuration settings for an application where values should not change during runtime (e.g., API keys, database connection strings).
- Immutable Data Structures: Building data structures that are inherently immutable, such as representing game state or financial transactions.
- React State Management: Ensuring the immutability of props passed down to React components for predictable behavior and efficient re-renders.
- Type Safety: Preventing accidental modification of critical object properties, leading to more robust code.
Key capabilities
- Defines readonly properties on TypeScript objects.
- Utilizes the
Readonlyutility type. - Enforces immutability at compile time.
Example prompts
- "Create a configuration object with 'apiKey' and 'apiUrl' as readonly properties."
- "Make all properties of this interface readonly."
- "Define a function that returns an object with readonly fields."
Tips & gotchas
This skill requires familiarity with TypeScript syntax and the Readonly utility type. Attempting to modify a readonly property at runtime will result in a compile-time error, helping catch potential bugs early on.
Tags
TrustedSkills Verification
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Security Audits
| Gen Agent Trust Hub | Pass |
| Socket | Pass |
| Snyk | Pass |
🌐 Community
Passed automated security scans.