skill-cutter

skill-cutter is a skill for Claude Code, Codex from CHENyiru3/AI-Skills-Collections. It costs 78 tokens per session (768 once invoked), scanned A, original, MIT.

A guide for auditing or trimming an existing agent skill, including its instructions and when it activates. It keeps necessary behavior while removing repetition, unsupported claims, and overly broad triggers.

In plain words
What is it for?
It is for reviewing, simplifying, narrowing, and editing skills or their folders when the goal is lower context cost or fewer accidental activations.
Why use it?
Long or loosely triggered skills can consume context and activate for unrelated requests. This workflow helps reduce that overhead without removing important safeguards or tool contracts.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the core plugin — 5 skills shipped together

Good fit It is for reviewing, simplifying, narrowing, and editing skills or their folders when the goal is lower context cost or fewer accidental activations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chenyiru3/ai-skills-collections/skill-cutter
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.

Any agent
npx skills add CHENyiru3/AI-Skills-Collections --skill skill-cutter
Clone the repo
git clone --depth 1 https://github.com/CHENyiru3/AI-Skills-Collections

Made for: Claude Code, Codex.

Or install core, the plugin that ships this one along with the rest of its 5 skills.

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 skill-cutter

README.md
[![agentmods](https://agentmods.dev/badge/skills/chenyiru3/ai-skills-collections/skill-cutter/github.svg)](https://agentmods.dev/skills/chenyiru3/ai-skills-collections/skill-cutter)
Your own site
<a href="https://agentmods.dev/skills/chenyiru3/ai-skills-collections/skill-cutter"><img src="https://agentmods.dev/badge/skills/chenyiru3/ai-skills-collections/skill-cutter/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 skill-cutter

Your own site · 80×15
<a href="https://agentmods.dev/skills/chenyiru3/ai-skills-collections/skill-cutter"><img src="https://agentmods.dev/badge/skills/chenyiru3/ai-skills-collections/skill-cutter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 768 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 $0.00078 $0.00768
Opus 5.5 $0.00031 $0.00307
Sonnet 5.5 $0.00016 $0.00154
Haiku 4.5 $0.00008 $0.00077

Measured 3d ago against content hash 96701fb24bf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skill-cutter 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 3d 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.

skills-market/core/dev/skill-cutter/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Cutter

Reduce context cost and accidental activation while preserving the decisions that make the skill useful. Length is evidence, not a target.

Establish scope

  • Audit requests authorize inspection and findings. Do not edit the target.
  • An explicit request to implement findings, cut, trim or simplify authorizes local edits to the named skill scope, not publication or consumer installation.
  • Read the complete SKILL.md, available UI metadata and directly relevant resources. Preserve unrelated work and identify the user's requested outcome.

Classify before editing

Keep non-obvious domain constraints, fragile required sequences, exact file/tool contracts and action-specific authorization or data-integrity controls.

Material Treatment
Useful optional expert advice Condense and mark non-blocking.
Generic knowledge or repeated policy Delete.
Duplicate example or instruction Keep the clearest useful instance.
Incident/project-specific rule in a generic skill Move to its actual scope or delete.
Stale or unsupported claim Verify with primary documentation, qualify or delete.
Useful detail for one variant Link a selectively loaded reference.

Do not move bulk merely to reduce the entrypoint's line count. Inspect callers before deleting scripts, assets or references; apparent non-use is insufficient.

Keep acceptance proportional

Blocking criteria come from the user outcome, higher-level invariants and risks created by the action. Distinguish:

  • Invariant: explicit and narrow, such as preserving sample identity.
  • Action-required: applies only to the named task, such as a file contract.
  • Risk-triggered gate: names the risk and proportional proof.
  • Recommendation/opportunity: advice or follow-up, not a prerequisite.

Flag unrelated coordination, optional infrastructure presented as mandatory, repeated approval despite established authorization, self-approval by a broken subsystem, and proof gathering that cannot change acceptance. More than one or two skill-added gates for a bounded task needs a concrete correctness, privacy, security, data-integrity or irreversible-action reason.

Read the full file on GitHub · 80 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 80 lines · 78 tokens per session scan A 96701fb24bf2

Subscribe to this mod's changes

skill-cutter is a skill published in the GitHub repository CHENyiru3/AI-Skills-Collections (2 stars, last pushed 3d ago), licensed MIT. It adds 78 tokens to every session and 768 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-11-11.

Related

skill-cutter compared with skills from other repositories

skill-cutter next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
skill-cutterCHENyiru3/AI-Skills-CollectionsSkill23d agoMITA78Claude Code, Codex
imagegenopenai/codexSkill135ktodayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill100ktodayApache-2.0A19Claude Code
browser-automationopenclaw/openclawSkill394ktodayMITA36Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill80k7d agoMITA200Claude Code, Codex
next-cache-components-adoptionvercel/next.jsSkill144ktodayMITA95Claude Code
chat-pet-sprite-creationmicrosoft/vscodeSkill195ktodayMITA53Claude Code, Codex