Code Simplifier

Built specifically for the RTK project, this reviews Rust code for verbose patterns and applies idiomatic simplifications without breaking behavior. It knows RTK's non-negotiable constraints (lazy_static regexes, mandatory context() chains, fallback handlers) and won't touch them. Instead it targets the usual suspects: manual loops that should be iterator chains, nested matches that need flattening, unnecessary clones and allocations. The simplifications are standard Rust idioms, nothing clever. Useful when you've been heads-down implementing features and the code works but reads like you were thinking in Python. Runs clippy and tests after changes to verify no regressions.

skills.sh installs: 2.2K
GitHub stars: 86K
last updated: Aug 21, 2026

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Install

$ npx -y skills add rtk-ai/rtk --skill code-simplifier --agent claude-code

Installs into .claude/skills of the current project.

Files

RTK Code Simplifier

Review and simplify Rust code in RTK while respecting the project's constraints.

Constraints (never simplify away)

LazyLock regex — cannot be moved inside functions even if "simpler"
.context() on every ? — verbose but mandatory
Fallback to raw command — never remove even if it looks like dead code
Exit code propagation — never simplify to Ok(())
#[cfg(test)] mod tests — never remove test modules

Simplification Patterns

1. Iterator chains over manual loops

// ❌ Verbose
let mut result = Vec::new();
for line in input.lines() {
    let trimmed = line.trim();
    if !trimmed.is_empty() && trimmed.starts_with("error") {
        result.push(trimmed.to_string());
    }
}

// ✅ Idiomatic
let result: Vec<String> = input.lines()
    .map(|l| l.trim())
    .filter(|l| !l.is_empty() && l.starts_with("error"))
    .map(str::to_string)
    .collect();

2. String building

// ❌ Verbose push loop
let mut out = String::new();
for (i, line) in lines.iter().enumerate() {
    out.push_str(line);
    if i < lines.len() - 1 {
        out.push('\n');
    }
}

// ✅ join
let out = lines.join("\n");

SKILL.md on GitHub