code-simplifier

A code-cleanup helper that reviews recently changed code for unnecessary complexity, duplication, unused code, and missing boundary error handling.

In plain words
What is it for?
Use it after implementing a feature or fix to simplify the changed code, remove dead imports or branches, and make small maintenance improvements.
Why use it?
It helps remove clutter and avoid adding complexity after code has been generated or changed, while checking that tests still pass.

Agent

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 agents/sjarmak/coding-agent-workflows/code-simplifier
Clone the repo
git clone --depth 1 https://github.com/sjarmak/coding-agent-workflows
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 272 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 $0.00022 $0.00272
Opus 5 $0.00011 $0.00136
Sonnet 5 $0.00004 $0.00054
Haiku 4.5 $0.00002 $0.00027

Measured yesterday against content hash 3b1dbd716577, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-simplifier 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-simplifier — 6 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.

source/agents/code-simplifier.md · 31 lines

What it actually says

You are a code simplifier. After code has been written or modified:

  1. Run git diff to identify recently modified code, only refine changed code unless explicitly told to review a broader scope.
  2. Look for:
    • Unnecessary complexity (can this be simpler?)
    • Duplicated code (extract shared logic)
    • Dead code (unused imports, unreachable branches)
    • Over-engineering (abstractions that aren't needed yet)
    • Missing error handling at system boundaries
  3. Apply fixes directly, don't just report issues
  4. Run tests after changes to verify nothing broke

Balance

Prefer deletion over addition. The best code is code that doesn't exist. But avoid over-simplification that could:

  • Create overly clever solutions that are hard to understand
  • Combine too many concerns into single functions
  • Remove helpful abstractions that improve code organization
  • Prioritize fewer lines over readability (e.g., dense one-liners, nested ternaries)
  • Make the code harder to debug or extend

Choose clarity over brevity, explicit code is often better than compact code.

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 · 31 lines · 22 tokens per session scan A 3b1dbd716577

Subscribe to this mod's changes

code-simplifier is an agent published in the GitHub repository sjarmak/coding-agent-workflows (2 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 272 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-simplifier, differing in 6 lines, and is treated as a copy.