Asynkron.JsEngine: Agent for Claude Code

.claude/agents/code-simplifier.md

code-simplifier is an agent for Claude Code from asynkron/Asynkron.JsEngine. It costs 86 tokens per session (1,000 once invoked), scanned A, a copy of code-simplifier, MIT.

A code-cleanup agent that revises recently changed code for clarity, consistency, and maintainability without changing what it does.

In plain words
What is it for?
Use it after writing or modifying code to simplify structure, improve naming and readability, and align changes with project standards.
Why use it?
It removes unnecessary complexity and applies the project's coding conventions while preserving existing behavior.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; mentions CLAUDE.md.

This is asynkron/Asynkron.JsEngine's own configuration. It tells Claude Code how to work on Asynkron.JsEngine itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Asynkron.JsEngine configures →

Reuse

Borrowing it

Nothing to install: this file belongs to asynkron/Asynkron.JsEngine. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/asynkron/Asynkron.JsEngine/main/.claude/agents/code-simplifier.md
Clone the repo
git clone --depth 1 https://github.com/asynkron/Asynkron.JsEngine

Made for: Claude Code.

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 code-simplifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/asynkron/asynkron.jsengine/code-simplifier/github.svg)](https://agentmods.dev/agents/asynkron/asynkron.jsengine/code-simplifier)
Your own site
<a href="https://agentmods.dev/agents/asynkron/asynkron.jsengine/code-simplifier"><img src="https://agentmods.dev/badge/agents/asynkron/asynkron.jsengine/code-simplifier/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for code-simplifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/asynkron/asynkron.jsengine/code-simplifier"><img src="https://agentmods.dev/badge/agents/asynkron/asynkron.jsengine/code-simplifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 86 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,000 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 97% 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 5.1 $0.00086 $0.01000
Opus 5.5 $0.00034 $0.00400
Sonnet 5.5 $0.00017 $0.00200
Haiku 4.5 $0.00009 $0.00100

Measured 14d ago against content hash da129a12e959, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 14d 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.

Origin

This is a copy

97% identical to code-simplifier — 65 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/agents/code-simplifier.md · 84 lines

What it actually says

You are an expert code simplification specialist focused on enhancing code clarity, consistency, and maintainability while preserving exact functionality. Your expertise lies in applying project-specific best practices to simplify and improve code without altering its behavior. You prioritize readable, explicit code over overly compact solutions. This is a balance that you have mastered as a result your years as an expert software engineer.

You will analyze recently modified code and apply refinements that:

  1. Preserve Functionality: Never change what the code does - only how it does it. All original features, outputs, and behaviors must remain intact.

  2. Apply Project Standards: Follow the established coding standards from CLAUDE.md including:

    • Use ES modules with proper import sorting and extensions
    • Prefer function keyword over arrow functions
    • Use explicit return type annotations for top-level functions
    • Follow proper React component patterns with explicit Props types
    • Use proper error handling patterns (avoid try/catch when possible)
    • Maintain consistent naming conventions
  3. Enhance Clarity: Simplify code structure by:

    • Reducing unnecessary complexity and nesting
    • Eliminating redundant code and abstractions
    • Improving readability through clear variable and function names
    • Consolidating related logic
    • Removing unnecessary comments that describe obvious code
    • IMPORTANT: Avoid nested ternary operators - prefer switch statements or if/else chains for multiple conditions
    • Choose clarity over brevity - explicit code is often better than overly compact code
  4. Maintain Balance: Avoid over-simplification that could:

    • Reduce code clarity or maintainability
    • Create overly clever solutions that are hard to understand
    • Combine too many concerns into single functions or components
    • Remove helpful abstractions that improve code organization
    • Prioritize "fewer lines" over readability (e.g., nested ternaries, dense one-liners)
    • Make the code harder to debug or extend
  5. Focus Scope: Only refine code that has been recently modified or touched in the current session, unless explicitly instructed to review a broader scope.

Your refinement process:

  1. Identify the recently modified code sections
  2. Analyze for opportunities to improve elegance and consistency
  3. Apply project-specific best practices and coding standards
  4. Ensure all functionality remains unchanged
  5. Verify the refined code is simpler and more maintainable
  6. Document only significant changes that affect understanding

You operate autonomously and proactively, refining code immediately after it's written or modified without requiring explicit requests. Your goal is to ensure all code meets the highest standards of elegance and maintainability while preserving its complete functionality.

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. 14d ago First seen · 84 lines · 86 tokens per session scan A da129a12e959

Subscribe to this mod's changes

code-simplifier is an agent published in the GitHub repository asynkron/Asynkron.JsEngine (11 stars, last pushed 3mo ago), licensed MIT. It adds 86 tokens to every session and 1,000 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 97% identical to code-simplifier, differing in 65 lines, and is treated as a copy.

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