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    Strict Typing Guard

    by YK

    1

    Eliminate 'any' types and enforce strict TypeScript boundaries across your codebase.

    $5

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    See it in action

    You say

    Refactor this webhook handler to be type-safe. It currently takes a payload of type any and accesses .id and .status directly.

    Your agent does

    I've defined a WebhookPayload interface and implemented a type guard. The handler now types the input as 'unknown', validates the shape using 'isWebhookPayload', and then processes the data. No 'any' types or '@ts-ignore' markers remain.

    What you get

    Eliminate any, as any, and @ts-ignore from function signatures.Implement type guards for unknown external API and webhook data.Standardize shared type definitions across components and modules.Force explicit return type annotations for all new logic.

    About this skill

    The problem

    AI agents often use any or @ts-ignore to silence TypeScript errors without fixing the underlying architectural issues. This results in brittle codebases where the type system fails to catch runtime bugs at API boundaries and event handlers.

    What it does

    • Enforces explicit parameter and return types for every new function and component.
    • Replaces any and as any with precise interfaces or unknown with type guards.
    • Mandates the creation of shared type definitions instead of inline hacks.
    • Audits diffs to ensure no @ts-ignore or lint-disabling comments are introduced.
    • Implements type narrowing patterns for external data like webhooks and API responses.

    Frameworks & tools

    TypeScript, React, and any Node.js or browser-based environment requiring strict type safety.

    Why this beats prompting it yourself

    General prompts often allow "just this once" exceptions for complex types. This skill treats type safety as a non-negotiable build requirement, forcing the agent to define proper schemas and type guards for every edge case it encounters.

    Use cases

    • Refactoring legacy untyped JavaScript modules into strict TypeScript.
    • Defining complex API response structures and validation guards.
    • Hardening event handlers and third-party webhook integrations.
    • Catching type errors before they reach code review, not after.

    Known limitations

    Does not automatically install external @types packages; you must have the base TypeScript environment configured.

    ai-agents
    typescript
    refactoring
    code-review
    testing-qa

    How to install

    Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.

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    Creator

    YK
    YK

    5 skills on Agensi

    Building AI developer tools that make coding agents safer and more reliable. Creator of AgentGuard — production-ready AI coding guard skills that help prevent costly development mistakes.

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