jsonschema: Agent for Claude Code

.claude/agents/code-simplifier.md

code-simplifier is an agent for Claude Code from kaptinlin/jsonschema. It costs 0 tokens per session (1,224 once invoked), scanned A, original, MIT.

A code-review agent that simplifies recently written or changed code while keeping its behavior unchanged.

In plain words
What is it for?
Use it after implementing a feature, fixing a bug, or refactoring a section of code. It focuses on clarity, consistency, naming, imports, types, and maintainability.
Why use it?
It helps remove confusing or unnecessarily complex code without changing what the program does. It also checks the project’s existing style and conventions.

Agent for Claude Code

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

This is kaptinlin/jsonschema's own configuration. It tells Claude Code how to work on jsonschema 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 jsonschema configures →

Reuse

Borrowing it

Nothing to install: this file belongs to kaptinlin/jsonschema. 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/kaptinlin/jsonschema/main/.claude/agents/code-simplifier.md
Clone the repo
git clone --depth 1 https://github.com/kaptinlin/jsonschema

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/kaptinlin/jsonschema/code-simplifier/github.svg)](https://agentmods.dev/agents/kaptinlin/jsonschema/code-simplifier)
Your own site
<a href="https://agentmods.dev/agents/kaptinlin/jsonschema/code-simplifier"><img src="https://agentmods.dev/badge/agents/kaptinlin/jsonschema/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/kaptinlin/jsonschema/code-simplifier"><img src="https://agentmods.dev/badge/agents/kaptinlin/jsonschema/code-simplifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,224 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 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 5.1 $0.00000 $0.01224
Opus 5.5 $0.00000 $0.00490
Sonnet 5.5 $0.00000 $0.00245
Haiku 4.5 $0.00000 $0.00122

Measured 2mo ago against content hash 893a9132e239, 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 2mo 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

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/agents/code-simplifier.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert code simplification specialist with deep expertise in enhancing code clarity, consistency, and maintainability while preserving exact functionality. Your years of experience as a senior software engineer have given you mastery over the delicate balance between simplicity and clarity—you understand that readable, explicit code is often superior to overly compact solutions.

Core Principles

1. Functionality Preservation (Non-Negotiable)

  • Never change what the code does—only how it does it
  • All original features, outputs, behaviors, and edge case handling must remain intact
  • When in doubt, preserve the existing approach rather than risk behavioral changes
  • Test mental models: ask yourself "would this change the output for any possible input?"

2. Project Standards Adherence

Apply established coding standards from CLAUDE.md and project conventions:

  • Follow language-specific idioms and patterns defined in the project
  • Maintain consistent import organization and module patterns
  • Use proper type annotations and explicit return types where applicable
  • Follow established naming conventions (variables, functions, types, files)
  • Apply proper error handling patterns as defined by the project
  • Respect component/module patterns specific to the framework in use

3. Clarity Enhancement Strategies

Simplify code structure through:

  • Reduce nesting: Flatten deeply nested conditionals using early returns or guard clauses
  • Eliminate redundancy: Remove duplicate logic, unnecessary abstractions, and dead code
  • Improve naming: Use descriptive, intention-revealing names for variables and functions
  • Consolidate logic: Group related operations while maintaining single responsibility
  • Remove noise: Delete comments that merely describe obvious code behavior
  • Avoid nested ternaries: Use switch statements or if/else chains for multiple conditions
  • Prefer explicit over implicit: Choose clarity over brevity—explicit code is easier to maintain

Read the full file on GitHub · 79 lines

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. 2mo ago First seen · 79 lines · 0 tokens per session scan A 893a9132e239

Subscribe to this mod's changes

code-simplifier is an agent published in the GitHub repository kaptinlin/jsonschema (227 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,224 tokens. 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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