ClaudSkills / Science & Research / math-stats

Complexity Cuts

Q: What is a Claude Code skill and how does the Complexity Cuts skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Complexity Cuts is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Science & Research category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Science & Research · Sub-category: math-stats · Last updated: 2026-05-26

Use when refactoring existing code that has poor Big-O — nested loops, O(n^2)+ scans, repeated work, redundant allocations, blown memory, or stated symptoms like "this is slow on large inputs", "times out", "OOM", "too much memory", "reduce complexity", "optimize this algorithm". Targets time and space complexity of code that already exists. For preventing bad complexity before code is written, use lemmaly. For math-level optimizations (Bloom, HLL, FFT, JL projection), escalate to mathguard.

From the source SKILL.md

lemmaly prevents bad complexity before code is written. complexity-cuts fixes it after the fact: code already exists, it works, but its time or space complexity is worse than necessary.

What this skill does

Complexity Cuts is a community-contributed Claude Code skill in the math-stats sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/complexity-cuts/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when refactoring existing code that has poor Big-O — nested loops, O(n^2)+ scans, repeated work, redundant allocations, blown memory, or stated symptoms like "this is slow on large inputs", "times out", "OOM", "too much memory", "reduce complexity", "optimize this algorithm". Targets time and space complexity of code that already exists.

Who uses this skill

The Complexity Cuts Claude Code skill is built for researchers, data scientists, academics, and analysts working with complex data and scientific literature. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 93,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/complexity-cuts
curl -L https://claudskills.com/skills/complexity-cuts/SKILL.md \
  -o ~/.claude/skills/complexity-cuts/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/complexity-cuts/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/complexity-cuts/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\complexity-cuts\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Complexity Cuts Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/complexity-cuts/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Complexity Cuts skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Complexity Cuts skill?

Use Complexity Cuts when your Claude Code task falls under the Science & Research category — specifically in the math stats area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Complexity Cuts" or describe the task and let Claude pick). Browse related skills at /category/science/.

What is a Claude Code skill and how does the Complexity Cuts skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Complexity Cuts is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Science & Research category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/morsechimwai/lemmaly/blob/HEAD/.agents/skills/complexity-cuts/SKILL.md
License: Apache-2.0
Author: morsechimwai
Website: https://www.lemmaly.dev/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

morsechimwai. (2026). Complexity Cuts [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/complexity-cuts/

BibTeX

@misc{complexity-cuts-2026,
  author    = {morsechimwai},
  title     = {Complexity Cuts [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/complexity-cuts/}
}

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