code-simplifier

A coding agent that simplifies recently changed code while keeping its behavior unchanged.

In plain words
What is it for?
Use it after a coding task, especially a multi-file change, to align the result with project conventions and improve names, structure, and clarity.
Why use it?
It removes unnecessary complexity, duplication, nesting, and abstractions, making code easier to read and maintain.

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/runnithan/claudex-setup/code-simplifier
Clone the repo
git clone --depth 1 https://github.com/runnithan/claudex-setup
Per session 447 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 985 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 $0.00447 $0.00985
Opus 5 $0.00224 $0.00492
Sonnet 5 $0.00089 $0.00197
Haiku 4.5 $0.00045 $0.00098

Measured yesterday against content hash b53776a0adc4, 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.

agents/code-simplifier.md · 86 lines

What it actually says

Simplify recently modified code for clarity, consistency, and maintainability while preserving exact functionality. Apply project-specific best practices without altering behavior, and prefer readable, explicit code over overly compact solutions.

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:

    • Follow the coding patterns and conventions defined in the project's CLAUDE.md files
  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

When invoked, you operate autonomously, refining the recently modified code without further hand-holding. You run on request or as a deliberate pass after a multi-file task, not automatically on every edit.

Before you finish, verify: behavior is unchanged (no feature, output, or contract altered), the diff touches only recently modified code, and each simplification left the code easier to read than before.

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 · 86 lines · 447 tokens per session scan A b53776a0adc4

Subscribe to this mod's changes

code-simplifier is an agent published in the GitHub repository runnithan/claudex-setup (1 stars, last pushed yesterday), licensed MIT. It adds 447 tokens to every session and 985 once invoked, about $0.0022 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 2026-08-31.