simplify-fn

simplify-fn is a command for coding agents from rohitg00/awesome-claude-code-toolkit. It costs 0 tokens per session (295 once invoked), scanned A, original, Apache-2.0.

A command that restructures one complicated function into smaller, clearer parts while keeping its existing behavior unchanged.

In plain words
What is it for?
Use it to extract helper functions, simplify conditions and loops, replace suitable switch statements, run tests, and compare complexity before and after.
Why use it?
It reduces tangled decision logic and makes the function easier to read, test, and modify without changing what it does.

Command

Part of the complexity-reducer plugin — 2 commands shipped together

About the project

Awesome Claude Code Toolkit is a curated collection of extensions and configuration for Claude Code, including agents, skills, commands, plugins, hooks, rules, templates, MCP configurations, and companion apps. It is for Claude Code users who want ready-made workflows and integrations for different development tasks. The catalogue add-ons are selected components from this toolkit.

rohitg00/awesome-claude-code-toolkit · 2,585 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/rohitg00/awesome-claude-code-toolkit/simplify-fn
Clone the repo
git clone --depth 1 https://github.com/rohitg00/awesome-claude-code-toolkit

Or install complexity-reducer, the plugin that ships this one along with the rest of its 2 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for simplify-fn

README.md
[![agentmods](https://agentmods.dev/badge/commands/rohitg00/awesome-claude-code-toolkit/simplify-fn.svg)](https://agentmods.dev/commands/rohitg00/awesome-claude-code-toolkit/simplify-fn)
Your own site
<a href="https://agentmods.dev/commands/rohitg00/awesome-claude-code-toolkit/simplify-fn"><img src="https://agentmods.dev/badge/commands/rohitg00/awesome-claude-code-toolkit/simplify-fn.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 295 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00295
Opus 5 $0.00000 $0.00148
Sonnet 5 $0.00000 $0.00059
Haiku 4.5 $0.00000 $0.00030

Measured yesterday against content hash ec73a8af65e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

simplify-fn scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/complexity-reducer/commands/simplify-fn.md · 29 lines

What it actually says

/simplify-fn - Simplify Complex Function

Refactor a complex function to reduce cyclomatic complexity.

Steps

  1. Read the target function and calculate its current complexity score
  2. Identify the primary complexity drivers: nested ifs, loops, switch statements
  3. Map the function's control flow to understand all execution paths
  4. Apply Extract Method refactoring: pull out logical blocks into named functions
  5. Replace nested conditionals with guard clauses (early returns)
  6. Convert switch statements to lookup tables or strategy pattern where appropriate
  7. Replace complex boolean expressions with named boolean variables
  8. Decompose loops with multiple responsibilities into separate loops or higher-order functions
  9. Apply polymorphism to replace type-checking conditionals when applicable
  10. Verify the refactored code preserves all original behavior by running tests
  11. Calculate the new complexity score and report the improvement
  12. Ensure the refactored code is readable and properly named

Rules

  • Preserve all existing behavior; this is refactoring, not feature change
  • Run tests after each refactoring step to catch regressions immediately
  • Target a complexity score of 5 or below for the main function
  • Keep extracted functions small (under 15 lines) and single-purpose
  • Use descriptive names for extracted functions that explain the "why"
  • Do not introduce new dependencies or external libraries
  • If tests do not exist, write them before refactoring
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 29 lines · 0 tokens per session scan A ec73a8af65e0

Subscribe to this mod's changes

simplify-fn is a command published in the GitHub repository rohitg00/awesome-claude-code-toolkit (2,585 stars, last pushed 3mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 295 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.