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zerospin-error

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Create and map ZerospinError instances for Effect-based code in zerospin. Use when defining error codes/messages, wrapping causes, mapping/catching errors in Effects, or returning structured errors from Effect.gen/Effect.fn or promise boundaries.

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How to use this skill

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  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/zeropsin-error/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/zerospin-error/. Do not write files or run scripts until I approve.

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Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

ZerospinError

Create structured errors with stable codes, human messages, and optional metadata.

Quick patterns

  • Prefer full form with code, message, and cause when wrapping.
  • Use the short form only for trivial cases: new ZerospinError('some-code').
  • Return errors from Effect.gen with return yield* new ZerospinError(...).
const error = new ZerospinError({
 code: 'failed-to-fetch',
 message: 'Failed to fetch data',
 cause: originalError,
 extra: { url },
 status: 502,
});

Rules

  • Use a stable, kebab-case code string; never include dynamic data in the code.
  • Keep message human-readable and specific to the failure.
  • Always attach the original cause when wrapping another error.
  • Use extra for structured metadata (ids, inputs, context), not for free-form text.
  • Use status only for HTTP-facing errors.

Effect usage

Return it don't throw it, duh

const res = yield* Effect.promise(() => fetch('/api/data'));
if (res.status === 404) {
 return yield* new ZerospinError({
  code: 'resource-not-found',
  message: 'Resource not found',
 });
}

Working with promises - mapError!

const parsed = Effect.promise(() => res.json()).pipe(
 Effect.mapError((error) => {
  return new ZerospinError({
   code: 'failed-to-parse-json',
   message: 'Failed to parse JSON',
   cause: error,
  });
 })
);

Effect.fn

Catch all

const safe = effect.pipe(
 Effect.catchAll((error) => {
  return new ZerospinError({
   code: 'operation-failed',
   message: error.message,
   cause: error,
  });
 })
);