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create-skill

create-skill is a skill for Claude Code, Codex from richfrem/agent-plugins-skills. It costs 59 tokens per session (1,749 once invoked), scanned A, original, MIT.

Creates a new stateless skill in an existing plugin. Use this for procedural skills with no persistent state. NOT for sub-agents (use create-sub-agent) and NOT for skills that need stateful counters or session memory (use create-stateful-skill).

Skill for Claude CodeCodex

not rated 6 today A scan 59 tokens MIT
View the source file richfrem/agent-plugins-skills
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/richfrem/agent-plugins-skills/create-skill
Any agent
npx skills add richfrem/agent-plugins-skills --skill create-skill
Clone the repo
git clone --depth 1 https://github.com/richfrem/agent-plugins-skills

Made for: Claude Code, Codex.

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 create-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/create-skill.svg)](https://agentmods.dev/skills/richfrem/agent-plugins-skills/create-skill)
Your own site
<a href="https://agentmods.dev/skills/richfrem/agent-plugins-skills/create-skill"><img src="https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/create-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,749 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00059 $0.01749
Opus 5 $0.00030 $0.00874
Sonnet 5 $0.00012 $0.00350
Haiku 4.5 $0.00006 $0.00175

Measured today against content hash 370c4ff7ae51, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-skill 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 today.

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.

plugins/agent-scaffolders/skills/create-skill/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

create-skill: Skill Scaffolding Executor

Scaffolds a complete, standards-compliant agent skill directory. Handles filesystem operations, template rendering, name validation, and discovery — then hands off to the TDD quality gate.

Scope: This skill owns structure. It does not own content quality or routing accuracy. Those are governed by os-improvement-loop (see cross-plugin handoff below).

Inputs

  • $ARGUMENTS — optional skill name or brief use-case description passed as initial context to the discovery phase. Omit to start with open discovery.

Phase 1: Discovery Interview

Before writing any files, capture all required inputs:

  1. Skill name — lowercase-hyphen slug (e.g. link-validator). Validate: no spaces, no special characters, no shell injection sequences (reject names containing ;, &, |, $, `).
  2. Purpose — one sentence: what does this skill do and when does it fire?
  3. Target plugin — which plugin directory will own this skill?
  4. Trigger phrases — 3-5 specific phrases a user would say to invoke it.
  5. Tools needed — which allowed-tools does it require?

If $ARGUMENTS is provided, treat it as a starting point and confirm rather than re-ask.

Phase 2: Plan and Confirm

Present the proposed directory layout before writing anything:

plugins/<plugin>/skills/<skill-name>/
  SKILL.md
  evals/
    evals.json
  references/
    acceptance-criteria.md
  ./scripts/         (if the skill needs Python helpers)
  ./assets/          (if the skill needs static resources)

Read the full file on GitHub · 171 lines

Files

What ships with it

60 files 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. today First seen · 171 lines · 59 tokens per session scan A 370c4ff7ae51

Subscribe to this mod's changes

create-skill is a skill published in the GitHub repository richfrem/agent-plugins-skills (6 stars, last pushed today), licensed MIT. It adds 59 tokens to every session and 1,749 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 2026-09-03.

Memory and contextagent-skillsagentic-frameworkagentic-harnessagentic-osclaude-code-skillclaude-plugins
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