simplify

A cleanup review for recent code changes that looks for repeated code, quality issues, and inefficient implementations, then applies straightforward improvements.

In plain words
What is it for?
Use it to review uncommitted changes, staged changes, or files edited during the current conversation and apply safe simplifications.
Why use it?
It catches small problems before a pull request or after implementation, reducing unnecessary duplication and making the changed code easier to maintain.

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/qwenlm/qwen-code/simplify
Any agent
npx skills add QwenLM/qwen-code --skill simplify
Clone the repo
git clone --depth 1 https://github.com/QwenLM/qwen-code

Made for: Claude Code, Codex.

Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,113 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 $0.00063 $0.01113
Opus 5 $0.00032 $0.00557
Sonnet 5 $0.00013 $0.00223
Haiku 4.5 $0.00006 $0.00111

Measured 2d ago against content hash 739a6293f0c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

simplify 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.

packages/core/src/skills/bundled/simplify/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Simplify Recent Changes

You are running a structured cleanup workflow over recent code changes. Your goal is not just to comment on the code, but to safely improve it.

Step 1: Identify the review scope

Determine which files and changes to review.

  1. First inspect the current git state.
  2. If there are staged changes, review against HEAD so both staged and unstaged tracked changes are included.
  3. Otherwise review the current uncommitted diff.
  4. If there is no git diff, fall back to git ls-files --modified --others --exclude-standard so the scope respects .gitignore (this keeps build output, node_modules, and other ignored paths out of the cleanup).
  5. If that is still empty, fall back to files edited in this conversation.
  6. If you still cannot identify a meaningful scope, stop and tell the user there are no recent changes to simplify.

Preferred commands:

  • git diff --name-only
  • git diff --staged --name-only
  • git diff HEAD --name-only
  • git diff
  • git diff HEAD
  • git status --short

Use git diff HEAD whenever staged changes exist. Otherwise use git diff.

Step 2: Launch three review passes in parallel

Use the agent tool and launch all review passes in a single response so they run concurrently. Set subagent_type: "general-purpose" and run_in_background: false on every call — each pass must return its findings inline. Do NOT fork them: never set subagent_type: "fork". A fork runs fire-and-forget and never returns its findings, so there would be nothing to aggregate in Step 3. Each pass must receive the same review scope and diff command. These passes are read-only: each one inspects and reports findings only and must not modify files — all edits happen later in Step 4.

Keep each review prompt short and focused. Do not paste the full diff into the prompt. Tell each pass to read the diff itself and inspect only files relevant to its findings.

Pass 1: Code Reuse Review

Look for opportunities to reduce duplication and reuse existing code:

Read the full file on GitHub · 124 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. 2d ago First seen · 124 lines · 63 tokens per session scan A 739a6293f0c3

Subscribe to this mod's changes

simplify is a skill published in the GitHub repository QwenLM/qwen-code (27,559 stars, last pushed today), licensed Apache-2.0. It adds 63 tokens to every session and 1,113 once invoked, about $0.0003 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.

Related

Other skills, from other repositories

build-teaql-app

Build or change a TeaQL application in Java, Rust, Go, Swift, Python, C#/.NET, or TypeScript, including Kotlin/JVM applications that consume Java-generated libraries. Mandatory order: first draft and save a complete KSML model, then verify the client and evaluate that saved model, repair it through repeated evaluation…

teaql/teaql-agent-kit · 112 tokens

agent-manager-reference

Query agent-manager.dev's reference API and MCP server for documentation, the coding CLIs it manages, the tools its MCP server exposes, and the current release. Use instead of scraping the website's HTML.

YoanWai/agent-manager · 45 tokens

loongsuite-pilot-insight

基于 LoongSuite Pilot / AI Coding Agent 日志生成事件洞察、组织洞察、数据质量、研发效能和 AI Native 使用类 SLS 报表时使用;包含 AI Coding 事件表语义,以及团队报表可选的部门维表、deptuser 组织关系、指标口径和公共 CTE,通常与 sls-dashboard-builder 一起使用。.

alibaba/loongsuite-pilot · 91 tokens

novel-workshop

小说创作工作台。用户说写小说、创作小说、写故事、写穿越文、写言情、写科幻、创作故事、开始创作、继续写、写下一章、多视角、POV、装订成册时使用。AI-assisted novel writing workbench for outline, characters, chapter drafting, multi-POV narrative, editing, and book assembly.

MerkyorLynn/Lynn · 90 tokens

hooksmith

Use when designing or reviewing safe Grok Build hooks for linting, tests, formatting, notifications, command guards, lifecycle automation, or project hook trust decisions.

DominikTobureto/awesome-grok-build · 35 tokens

repo-health-check

Use when auditing a repo before changes to find the smallest safe PR, quality risks, stale docs, missing tests, ignored-file gaps, or agent setup issues. Best first skill for unfamiliar codebases.

DominikTobureto/awesome-grok-build · 44 tokens