qiao

Competitive multi-agent problem solving: spawns multiple Claude Code sub-agents in parallel git worktrees to independently solve the same programming task, then cross-pollinates their solutions through improvement rounds where each agent sees and learns from all others' diffs, and finally selects the best solution through Borda count consensus voting with independent judges. Use this skill whenever the user says 'horse race', 'race', 'compete', 'multi-agent', wants to compare multiple approaches to a problem, or wants higher-quality solutions through competitive iteration. Also triggers when users want parallel implementations, solution tournaments, or A/B comparisons of code approaches.

Enforces the official Rust API Guidelines (https://rust-lang.github.io/api-guidelines/) when writing, reviewing, or refactoring Rust library code. Use this skill whenever you are writing new Rust structs, enums, traits, functions, or modules that form a public API — including when designing error types, implementing conversions, naming methods, adding documentation, creating macros, or structuring crate features. Also use it when reviewing existing Rust code for API quality, idiomatic patterns, or crate publishing readiness. Trigger on any Rust library design task, even if the user doesn't explicitly mention "API guidelines."