Understand Type Widening
Automatically adjusts data types during calculations to prevent errors and optimize performance in numerical workflows.
Install on your platform
We auto-selected Claude Code based on this skill’s supported platforms.
Run in terminal (recommended)
claude mcp add understand-type-widening npx -- -y @trustedskills/understand-type-widening
Or manually add to ~/.claude/settings.json
{
"mcpServers": {
"understand-type-widening": {
"command": "npx",
"args": [
"-y",
"@trustedskills/understand-type-widening"
]
}
}
}Requires Claude Code (claude CLI). Run claude --version to verify your install.
About This Skill
What it does
This skill allows an AI agent to understand and explain type widening in TypeScript. It can identify situations where the compiler implicitly converts a narrower type to a wider one, such as converting number to bigint. The skill provides explanations of why this happens and how to control or avoid unintended type widening.
When to use it
- Debugging Type Errors: When encountering unexpected behavior due to implicit type conversions in TypeScript code.
- Code Review: To help understand the implications of assignments involving different numeric types.
- Learning TypeScript: For developers new to TypeScript who want a deeper understanding of its type system.
- Explaining Code to Others: To clearly articulate why certain type conversions are occurring in a codebase.
Key capabilities
- Identifies instances of automatic type widening.
- Explains the reasons behind type widening behavior.
- Suggests ways to prevent or control unwanted type widening.
Example prompts
- "Explain why this TypeScript code is assigning a number to a bigint variable."
- "What are the potential issues with implicit type widening in TypeScript?"
- "How can I ensure that my TypeScript functions maintain precise numeric types?"
Tips & gotchas
This skill requires some familiarity with TypeScript's basic type system. Be specific about the code snippet you want analyzed to get more targeted explanations.
Tags
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Security Audits
| Gen Agent Trust Hub | Pass |
| Socket | Pass |
| Snyk | Pass |
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Passed automated security scans.