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everything-claude-code / rules

Cursor rule76 starsChanged 7 months agoMITView on GitHub

TypeScript coding style extending common rules

We split this typescript-coding-style.md into the rules it gives an agent

4 rules. About 0 are common, 4 are distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈4

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Use spread operator for immutable updates:

    line 12
  2. Distinctive:

    Use async/await with try-catch:

    line 32
  3. Distinctive:

    Use Zod for schema-based validation:

    line 46
  4. Distinctive:

    Use proper logging libraries instead

    line 62

≈ “Common” is an estimate: at least 1 in 5 of the 6,350 Cursor rule files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
typescript-coding-style.md

TypeScript/JavaScript Coding Style

This file extends the common coding style rule with TypeScript/JavaScript specific content.

Immutability

Use spread operator for immutable updates:

// WRONG: Mutation
function updateUser(user, name) {
  user.name = name  // MUTATION!
  return user
}

// CORRECT: Immutability
function updateUser(user, name) {
  return {
    ...user,
    name
  }
}

Error Handling

Use async/await with try-catch:

try {
  const result = await riskyOperation()
  return result
} catch (error) {
  console.error('Operation failed:', error)
  throw new Error('Detailed user-friendly message')
}

Input Validation

Use Zod for schema-based validation:

import { z } from 'zod'

const schema = z.object({
  email: z.string().email(),
  age: z.number().int().min(0).max(150)
})

const validated = schema.parse(input)

Console.log

  • No console.log statements in production code
  • Use proper logging libraries instead
  • See hooks for automatic detection

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Trending

Steady: 0 new projects took it in the last 4 weeks, none the 4 weeks before.thin data

Week of Aug 30: 0 new projectsWeek of Sep 6: 0 new projectsWeek of Sep 13: 0 new projectsWeek of Sep 20: 0 new projectsWeek of Sep 27: 0 new projectsWeek of Oct 4: 0 new projectsWeek of Oct 11: 0 new projectsWeek of Oct 18: 0 new projects
Aug 2026Sep 2026Oct 2026
New projects taking a version of this file each week, over the 8 weeks our latest run read: only 0 in all, so this is a hint, not a trend.

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