# Eser Aya Is Coding Practices

> Coding Practices

- Skill: `tomevault-io/eser-aya-is-coding-practices` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/eser-aya-is-coding-practices`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/eser-aya-is-coding-practices/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/eser-aya-is-coding-practices

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# Coding Practices

Guidelines for writing maintainable, robust, and self-documenting code.

## Quick Start

```typescript
// Self-documenting with proper error handling
function createUser(email: string, age: number): User {
  if (!email.includes("@")) throw new Error("Invalid email");
  if (age < 0 || age > 150) throw new Error("Invalid age");
  return { email, age };
}
```

## Key Principles

- Compare entities by IDs, never by slugs/usernames/strings
- Use meaningful names (self-documenting code)
- Comments explain "why", not "what"
- DRY: abstract when used 3+ times
- Validate all input data
- Handle all error cases with proper Error objects
- Never ignore errors
- Use named constants instead of magic values
- Avoid circular dependencies

## References

See [rules.md](references/rules.md) for complete guidelines with examples.

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<!-- tomevault:4.0:skill_md:2026-04-11 -->