code-simplification

A code cleanup guide that makes recently changed code easier to understand while keeping its behavior, errors, side effects, order, and public interfaces unchanged.

In plain words
What is it for?
Use it to remove dead code, reduce nested conditions, simplify wrappers, improve names, and eliminate repeated conversions. It supports small, tested changes and larger mechanical rewrites with code-transformation tools.
Why use it?
It removes unnecessary complexity without turning cleanup into an accidental feature change. It also helps identify when unclear code needs investigation before editing.

Skill for Claude CodeCodex

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 skills/thiientv/godmode/code-simplification
Any agent
npx skills add thiientv/godmode --skill code-simplification
Clone the repo
git clone --depth 1 https://github.com/thiientv/godmode

Made for: Claude Code, Codex.

Per session 75 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 392 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 $0.00075 $0.00392
Opus 5 $0.00037 $0.00196
Sonnet 5 $0.00015 $0.00078
Haiku 4.5 $0.00007 $0.00039

Measured 2d ago against content hash ae29d30f5040, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-simplification 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 2d ago.

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.

skills/code-simplification/SKILL.md · 49 lines

What it actually says

Code Simplification

Optimize comprehension and locality, not line count or personal style.

Establish the invariant

Identify callers, outputs, errors, side effects, ordering, performance-sensitive behavior, and tests. Read history or comments when a strange construct may be a compatibility fence. If behavior is unclear, stop and use codebase-orientation or root-cause-debugging before editing.

Find earned simplifications

Prefer concrete signals: duplicated policy, deep conditional nesting, stale branches, misleading names, pass-through wrappers, abstractions with no current variation, repeated conversions, and comments that restate code. Preserve abstractions that own policy, isolate volatility, or provide a real test seam.

Use simplification-checks.md to classify each candidate.

Change incrementally

  1. Make one coherent simplification.
  2. Run focused behavior proof without weakening existing assertions.
  3. Inspect the diff for hidden contract or error changes.
  4. Continue only while each step improves comprehension.

Use a codemod or AST-aware transformation for large mechanical rewrites. Keep feature work and broad cleanup separate unless the simplification is required to implement the authorized behavior safely.

Completion condition

Behavioral proof passes unchanged, the diff stays inside the stated scope, no error handling or compatibility path was accidentally removed, and the result is demonstrably easier to understand in its local codebase context.

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 49 lines · 75 tokens per session scan A ae29d30f5040

Subscribe to this mod's changes

code-simplification is a skill published in the GitHub repository thiientv/godmode (93 stars, last pushed 6d ago), licensed MIT. It adds 75 tokens to every session and 392 once invoked, about $0.0004 per session on Opus 5. 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 2026-08-30.

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