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Agent skill

Simplify

by fcakyon in fcakyon/claude-codex-settings

This skill should be used when the user asks to "simplify", "clean up the diff", "run simplify", "simplify the changes", "review changed code for cleanup", explicitly invokes "/simplify", or asks to…

Apache-2.0Auto-check passedDevelopment

Install Simplify

skills CLI
$ npx skills add fcakyon/claude-codex-settings --skill simplify -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install fcakyon/claude-codex-settings simplify --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/fcakyon/claude-codex-settings.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/simplify/skills/simplify .claude/skills/simplify && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
simplify
GitHub stars
1.2k
Token cost
~1.1k tokens
SKILL.md length
586 words
Files
1
Skills in repo
43
Repo updated
First seen
Licence
Apache-2.0

At a glance

This skill should be used when the user asks to "simplify", "clean up the diff", "run simplify", "simplify the changes", "review changed code for cleanup", explicitly invokes "/simplify", or asks to…

  • Works in 4 steps: Gather the diff → Review (4 cleanup agents in parallel) → Apply the fixes → …
  • Asks to simplify
  • SKILL.md covers Explicit commit bypass, Phase 0 — Gather the diff, Phase 1 — Review (4 cleanup… and Phase 2 — Apply the fixes, plus 1 more section
  • Calls git

What it does

Simplify is an agent skill from fcakyon/claude-codex-settings. This skill should be used when the user asks to "simplify", "clean up the diff", "run simplify", "simplify the changes", "review changed code for cleanup", explicitly invokes "/simplify", or asks to "commit without simplify", "skip simplify for this commit", or "commit this but skip simplify". Reviews changed code across reuse, simplification, efficiency, and altitude, or grants an explicit one-commit bypass. Not for correctness bugs.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development. It works with Git. The repository describes itself as: Battle-tested Claude Code, OpenAI Codex, Cursor configs, plugins, hooks and agents with Kimi, MiniMax and GLM API support. The licence is Apache-2.0.

When your agent uses it

  • Asks to simplify
  • Clean up the diff
  • Simplify the changes
  • Review changed code for cleanup

Example prompts

  • “simplify”
  • “clean up the diff”
  • “run simplify”
  • “/simplify”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Gather the diff
  2. Review (4 cleanup agents in parallel)
  3. Apply the fixes
  4. Mark completion

What it can do on your machine

Read from SKILL.md and the folder at commit a035b4e. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Simplify loads about 1.1k tokens when it runs. Until then it costs about 112 tokens; SKILL.md has 586 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~112
When it runs · the whole SKILL.md, loaded when a task matches
~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from fcakyon/claude-codex-settings at commit a035b4e, republished under its Apache-2.0 licence (© fcakyon). 586 words, ~1,076 tokens.

Download SKILL.mdSave it as .claude/skills/simplify/SKILL.md (or your agent's skills folder).
name
simplify
description
This skill should be used when the user asks to "simplify", "clean up the diff", "run simplify", "simplify the changes", "review changed code for cleanup", explicitly invokes "/simplify", or asks to "commit without simplify", "skip simplify for this commit", or "commit this but skip simplify". Reviews changed code across reuse, simplification, efficiency, and altitude, or grants an explicit one-commit bypass. Not for correctness bugs.

Simplify

/simplify → 4 cleanup agents in parallel → apply the fixes

You are improving the quality of the changed code, not hunting for bugs. Review it for reuse, simplification, efficiency, and altitude issues, then fix what you find. Do not look for correctness bugs, that is what /code-review is for.

Explicit commit bypass

If the user explicitly asks to commit while skipping simplify, skip the review phases below:

  1. State that simplify will be skipped for one commit and normal Git hooks will still run.
  2. Run this exact command from the worktree:
bash
echo simplify-guard:bypass
  1. Commit normally without --no-verify.

Never infer permission to bypass from the size, urgency, or type of change. The user must explicitly name simplify when asking to skip it.

Phase 0 — Gather the diff

Run git diff @{upstream}...HEAD (or git diff main...HEAD / git diff HEAD~1 if there's no upstream) to get the unified diff under review. If there are uncommitted changes, or the range diff is empty, also run git diff HEAD and include the working-tree changes in scope, the review often runs before the commit. If a PR number, branch name, or file path was passed as an argument, review that target instead. Treat this diff as the review scope.

Phase 1 — Review (4 cleanup agents in parallel)

Run 4 distinct reviews, one for each angle below. Launch four independent agents concurrently when capacity allows. If fewer than four slots are available, run the remaining angles in the primary agent or in later waves. Never omit or combine an angle. Pass each agent the diff and its assigned angle. Each returns its findings with file, line, a one-line summary, and the concrete cost (what is duplicated, wasted, or harder to maintain).

Reuse

Flag new code that re-implements something the codebase already has. Grep shared/utility modules and files adjacent to the change, and name the existing helper to call instead.

Simplification

Flag unnecessary complexity the diff adds: redundant or derivable state, copy-paste with slight variation, deep nesting, dead code left behind. Name the simpler form that does the same job.

Show full SKILL.md (244 more words)Show less
Efficiency

Flag wasted work the diff introduces: redundant computation or repeated I/O, independent operations run sequentially, blocking work added to startup or hot paths. Also flag long-lived objects built from closures or captured environments, they keep the entire enclosing scope alive for the object's lifetime (a memory leak when that scope holds large values). Prefer a class/struct that copies only the fields it needs. Name the cheaper alternative.

Altitude

Check that each change is implemented at the right depth, not as a fragile bandaid. Special cases layered on shared infrastructure are a sign the fix isn't deep enough, prefer generalizing the underlying mechanism over adding special cases.

Phase 2 — Apply the fixes

Wait for all four agents to complete, dedup findings that point at the same line or mechanism, and fix each remaining one directly. Skip any finding whose fix would change intended behavior, require changes well outside the reviewed diff, or that you judge to be a false positive, note the skip rather than arguing with it.

Phase 3: Mark completion

After all accepted fixes are applied, resolve the reviewed worktree with git -C '<reviewed-worktree>' rev-parse --show-toplevel, then put that absolute path in this command:

bash
echo simplify-guard:complete '/absolute/path/to/reviewed/worktree'

This lets the bundled guard record completion against the reviewed worktree even when the session started elsewhere. Do not run it before the review and cleanup phases finish.

Finish with a brief summary of what was fixed and what was skipped (or confirm the code was already clean).

© fcakyon, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/simplify/skills/simplify of fcakyon/claude-codex-settings.

Open the folder on GitHubat commit a035b4e

Compare with similar skills

Simplify next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Simplify compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Simplify this skillfcakyon/claude-codex-settings1.2k—~1.1kAutomated safety check: PassApache-2.0
Finishing a Development Branchobra/superpowers296k5 repos~1.9kAutomated safety check: PassMIT
Code Review ChecklistshareAI-lab/learn-claude-code78k5 repos~1.1kAutomated safety check: PassMIT
Codebase Knowledge Graph Q&AEgonex-AI/Understand-Anything85k1 repos~1.2kAutomated safety check: PassMIT
Code Design Rationale Investigatorcursor/plugins10k9 repos~2.6kAutomated safety check: PassNone
Understand Diff AnalysisEgonex-AI/Understand-Anything85k1 repos~1.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Simplify

What does Simplify do?

This skill should be used when the user asks to "simplify", "clean up the diff", "run simplify", "simplify the changes", "review changed code for cleanup", explicitly invokes "/simplify", or asks to…. Simplify is an agent skill from fcakyon/claude-codex-settings. This skill should be used when the user asks to "simplify", "clean up the diff", "run simplify", "simplify the changes", "review changed code for cleanup", explicitly invokes "/simplify", or asks to "commit without simplify", "skip simplify for this commit", or "commit this but skip simplify".

When should I use Simplify?

Simplify fits situations like: asks to simplify; clean up the diff; simplify the changes; review changed code for cleanup.

How do I install Simplify in Claude Code?

Run `npx skills add fcakyon/claude-codex-settings --skill simplify -a claude-code`. Or copy the skill folder (plugins/simplify/skills/simplify in fcakyon/claude-codex-settings) into .claude/skills/simplify in your project. Claude Code loads it when a task matches its description.

How do I install Simplify in Codex?

Run `npx skills add fcakyon/claude-codex-settings --skill simplify -a codex`. Or copy the skill folder (plugins/simplify/skills/simplify in fcakyon/claude-codex-settings) into .agents/skills/simplify in your project. Codex loads it when a task matches its description.

Can I use Simplify in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add fcakyon/claude-codex-settings --skill simplify -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/simplify, .gemini/skills/simplify, .github/skills/simplify and .opencode/skills/simplify in your project.

What does Simplify need to run?

Going by SKILL.md and its folder, Simplify needs the command-line tools its instructions call (git).

Does Simplify access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Simplify safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Simplify use?

Simplify is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Simplify use?

About 1.1k tokens (SKILL.md is roughly 4.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Simplify?

Skills that share tags, products or a category with Simplify: Finishing a Development Branch (obra/superpowers, 296k stars), Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Codebase Knowledge Graph Q&A (Egonex-AI/Understand-Anything, 85k stars) and Code Design Rationale Investigator (cursor/plugins, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Simplify?

fcakyon (a GitHub user) maintains it in fcakyon/claude-codex-settings, which has 1,163 GitHub stars. The repository holds 43 skills in this directory. The repository was last updated on October 6, 2026.

Source: fcakyon/claude-codex-settings on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.