# Antonygiomarxdev Maverick Rust No Magic Values > Rust — no magic literals - Skill: `tomevault-io/antonygiomarxdev-maverick-rust-no-magic-values` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/antonygiomarxdev-maverick-rust-no-magic-values` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/antonygiomarxdev-maverick-rust-no-magic-values/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/antonygiomarxdev-maverick-rust-no-magic-values --- # Rust — no magic literals ## What serious codebases typically do - **Compiler and Clippy**: favor `const` and rich types; teams often enable lints that reduce fragile `unwrap` patterns. - **`const` / `static`**: protocol values and defaults live in dedicated modules so the meaning of each number has one home. - **Enums**: closed sets with exhaustive `match`; prevent typos and drift across call sites. - **Newtypes**: `struct X(u32)` or typed arrays (`Eui64`) to avoid mixing units or semantics. - **Adapter layer**: table/column names and SQL fragments as `const` or a `schema` module, not copy-paste. - **Configuration**: operational policy belongs in config structs or named presets (e.g. install profile), not ad hoc literals inside logic. ## Checklist when changing code - [ ] Does this number or string encode domain or protocol meaning? → `const` or type. - [ ] Is it a closed set of variants? → `enum` (+ serde/display where needed). - [ ] Does the same literal already exist elsewhere? → unify in the right crate’s module. - [ ] Is it SQLite/HTTP/UDP detail? → keep it in the adapter, but **centralized** there. ## Anti-pattern A helper that takes `&str` for “event kind” used from many places without an enum: every call site is a future bug. --- > Source: [antonygiomarxdev/maverick](https://github.com/antonygiomarxdev/maverick) — distributed by [TomeVault](https://tomevault.io).