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authoring-skills

authoring-skills is a skill for Claude Code from richfrem/agent-plugins-skills. It costs 157 tokens per session (1,666 once invoked), scanned A, original, MIT.

A scaffolding and checking tool for agent skills. Skills are reusable instructions or procedures that an agent follows for a particular job.

In plain words
What is it for?
Use it to create, audit, or improve skills, including skills with Docker environments or Azure AI Foundry deployment.
Why use it?
It helps keep skills small, self-contained, portable, and aligned with the required authoring rules.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; mentions AGENTS.md.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 scripts/scaffold.py --type skill --name <name> --path plugins/<plugin>/skills --desc "<what it does. Use when ...>" [--variant executable].

Part of the agent-extension-authoring plugin — 6 skills shipped together

not rated 7repo today A scan 157 tokens original MIT

Good fit Use it to create, audit, or improve skills, including skills with Docker environments or Azure AI Foundry deployment.

Compare 6 skills from other repositories ↓
View source ↗ richfrem/agent-plugins-skills
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/richfrem/agent-plugins-skills
agentmods
npx agentmods add skills/richfrem/agent-plugins-skills/authoring-skills

Made for: Claude Code.

Or install agent-extension-authoring, the plugin that ships this one along with the rest of its 6 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 authoring-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/authoring-skills/github.svg)](https://agentmods.dev/skills/richfrem/agent-plugins-skills/authoring-skills)
Your own site
<a href="https://agentmods.dev/skills/richfrem/agent-plugins-skills/authoring-skills"><img src="https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/authoring-skills/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 authoring-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/richfrem/agent-plugins-skills/authoring-skills"><img src="https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/authoring-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 157 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,666 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 $0.00157 $0.01666
Opus 5.5 $0.00063 $0.00666
Sonnet 5.5 $0.00031 $0.00333
Haiku 4.5 $0.00016 $0.00167

Measured today against content hash 33052d0502ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

authoring-skills 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-extension-authoring/skills/authoring-skills/SKILL.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring Skills (authoring-skills)

Scaffolds skills from templates, audits them against references/skill-authoring-contract.json, and holds the specifications and pattern catalog the other authoring skills point to.

Contents

Constraints

  1. Self-contained: a skill's scripts, references and assets live inside it; no plugin-root hub, symlinks or copy manifest. Other skills are referred to by name.
  2. Lean router: SKILL.md is 100 lines or fewer; detail goes to references/ linked directly from it, and long references open with a contents list.
  3. Interactive work is a skill: multi-turn wizards and stateful flows are skills; use authoring-subagents only for isolated, sandboxed or adversarial roles.
  4. Gerund names, directory name equals frontmatter name, third-person description that says what and when.
  5. Audits are read-only; run both --mode source and --mode installed before declaring a skill compliant.
  6. Model names and tiers belong to the cli-agent skill.

Modes

Mode Use when Entry point Reference
create New skill, instructional or executable scripts/scaffold.py create-skill.md
stateful Interactive skill with persistent state scripts/scaffold.py + template create-stateful-skill.md
audit Check or align one skill or an inventory scripts/audit_skill.py audit-skill.md
docker Skill with a Docker runtime template guidance create-docker-skill.md
azure Skill as an Azure AI Foundry hosted agent scripts/scaffold_azure_agent.py create-azure-agent.md
mcp MCP server integration guidance only create-mcp-integration.md
standards Look up the spec, patterns and sources reference lookup ecosystem-standards.md, ecosystem-authoritative-sources.md

Read the full file on GitHub · 71 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 · 71 lines · 157 tokens per session scan A 33052d0502ff

Subscribe to this mod's changes

authoring-skills is a skill published in the GitHub repository richfrem/agent-plugins-skills (7 stars, last pushed today), licensed MIT. It adds 157 tokens to every session and 1,666 once invoked, about $0.0006 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 2026-10-24.

Building agentsCloudContainersDevOps and cloudagent-evaluationagent-orchestrationagentic-control-planeagentic-osagentic-workflowsai-agent-governance
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