# Eric Rust

> Apply when implementing or reviewing Rust types, module structure, errors, validation, serialization, or generated data contracts in any application.

- Skill: `akarachen/eric-rust` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add akarachen/eric-rust`
- Raw SKILL.md: https://api.skillmd.com/api/skills/akarachen/eric-rust/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: akarachen (https://skillmd.com/u/akarachen)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/akarachen/eric-rust

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# Eric Rust

- Use structs and enums for explicit data shapes, and newtypes for IDs.
- Keep Rust modules small: keep tightly coupled code together, split distinct concepts into sibling files, and use a directory with `mod.rs` when one feature owns multiple submodules.
- Use `thiserror` for reusable/API errors and `anyhow` at application edges. Match typed error variants instead of checking error strings.
- Use `garde` for input and DTO validation: derive attributes for field rules, custom validators for cross-field or collection invariants.
- Use `schemars` for JSON Schema and `ts-rs` for TypeScript DTO export, unless the project has an established contract export flow.