code-simplify

A code-cleanup command that makes recently changed or selected code easier to read and maintain while preserving its behavior.

In plain words
What is it for?
Simplifying functions, replacing deep nesting, extracting shared logic, removing confirmed dead code, and checking the result with tests and a build.
Why use it?
It helps reduce tangled logic, duplication, unclear names, dead code, and overly long functions without changing what the program does.

Command for Claude Code

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/borhen68/skillengine/code-simplify
Clone the repo
git clone --depth 1 https://github.com/borhen68/SkillEngine

Made for: Claude Code.

Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 220 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00014 $0.00220
Opus 5 $0.00007 $0.00110
Sonnet 5 $0.00003 $0.00044
Haiku 4.5 $0.00001 $0.00022

Measured yesterday against content hash 71e9e8d38c5c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-simplify 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.

Origin

This is a copy

100% identical to code-simplify — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/commands/code-simplify.md · 23 lines

What it actually says

Invoke the agent-skills:code-simplification skill.

Simplify recently changed code (or the specified scope) while preserving exact behavior:

  1. Read CLAUDE.md and study project conventions
  2. Identify the target code — recent changes unless a broader scope is specified
  3. Understand the code's purpose, callers, edge cases, and test coverage before touching it
  4. Scan for simplification opportunities:
    • Deep nesting → guard clauses or extracted helpers
    • Long functions → split by responsibility
    • Nested ternaries → if/else or switch
    • Generic names → descriptive names
    • Duplicated logic → shared functions
    • Dead code → remove after confirming
  5. Apply each simplification incrementally — run tests after each change
  6. Verify all tests pass, the build succeeds, and the diff is clean

If tests fail after a simplification, revert that change and reconsider. Use code-review-and-quality to review the result.

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 · 23 lines · 14 tokens per session scan A 71e9e8d38c5c

Subscribe to this mod's changes

code-simplify is a command published in the GitHub repository borhen68/SkillEngine (17 stars, last pushed 2mo ago), licensed MIT. It adds 14 tokens to every session and 220 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to code-simplify, differing in 0 lines, and is treated as a copy.