Zero-Cost Abstraction (Rust)

What it does

Provides compact, expertise-driven guidance on when to use generics (static dispatch) versus trait objects (dynamic dispatch) in Rust. It frames compiler errors (E0277, E0308, E0599, E0038) as design questions, offers decision heuristics, quick reference tables, and anti-patterns to avoid excessive generics or inappropriate dynamic dispatch.

When to use it

Use when facing Rust type-system design choices: performance-sensitive code needing zero runtime cost, heterogeneous collections, plugin architectures, or when resolving trait/object-safety compiler errors during development and code review. It’s aimed at Rust developers and tools that assist with compiler diagnostics.

What's included

• Scripts: none (has_scripts=false)
• References: none bundled, but links to related skill modules in the repo (m05-type-driven, m09-domain, m10-performance).
• Instructions: a structured decision guide, error→question mappings, trace-up/trace-down heuristics, and quick syntax examples to pick patterns that balance compile-time cost and runtime performance.

Compatible agents

Best used by coding assistants and CLI agents such as Codex CLI, Cursor, Claude Code, and other developer-focused agents able to read code and suggest refactors.