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.
npx skills add dryvist/claude-code-plugins --skill claude-skill-authoringgit clone --depth 1 https://github.com/dryvist/claude-code-pluginsWrote 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.
[](https://agentmods.dev/skills/dryvist/claude-code-plugins/claude-skill-authoring)<a href="https://agentmods.dev/skills/dryvist/claude-code-plugins/claude-skill-authoring"><img src="https://agentmods.dev/badge/skills/dryvist/claude-code-plugins/claude-skill-authoring/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.
<a href="https://agentmods.dev/skills/dryvist/claude-code-plugins/claude-skill-authoring"><img src="https://agentmods.dev/badge/skills/dryvist/claude-code-plugins/claude-skill-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00050 | $0.00501 |
| Opus 5.5 | $0.00020 | $0.00200 |
| Sonnet 5.5 | $0.00010 | $0.00100 |
| Haiku 4.5 | $0.00005 | $0.00050 |
Grade A, and why
claude-skill-authoring 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 29d 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.
What it actually says
AgentsMD Authoring Standards (estate-specific)
General skill-authoring guidance (frontmatter shape, progressive disclosure, naming) is Anthropic's own Agent Skills spec. This skill holds only what's specific to this estate.
File Structure
agentsmd/ # Single source of truth
├── AGENTS.md # Main entry point
├── rules/ # Auto-load every session (via .claude/rules symlink)
├── skills/ # On-demand (via .claude/skills symlink)
├── agents/ # Task subagents (via .claude/agents symlink)
└── workflows/ # Development workflow docs
.copilot/, .claude/, .gemini/ # Vendor dirs — symlinks only, no duplicates
Vendor directories contain symlinks only. All canonical content lives in
agentsmd/. DRY — never duplicate across vendors.
Description length
CI enforces this (see J1 in the cost-alignment plan): a SKILL.md
description over 1024 bytes fails the build. Soft target: 250
characters — a trigger phrase plus a one-clause purpose. Count bytes, not
characters — Codex counts bytes (anthropics/claude-code and codex#7730).
The self-contained rule
A skill must run correctly and safely when it loads alone. Before trimming or moving anything out, ask: "if only this skill loaded, would it still work?" If not, the content stays inline — token count is a flag, never a reason to break this. Safety reminders (destructive git ops, merge-readiness gates, least-privilege rules) stay inline even when duplicated elsewhere; deduplicate only reference material (command catalogs, tables, examples).
Related Skills
- skills-registry (project-standards) — Use when looking up available skills, agents, tools, or plugins
- workspace-standards (project-standards) — Use when setting up or managing multi-repo workspaces
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.
- 29d ago Changed · -76 lines · -4 tokens per session 3320c4872011
- 1mo ago First seen · 125 lines · 54 tokens per session scan A b655c9ee2f3f
claude-skill-authoring is a skill published in the GitHub repository dryvist/claude-code-plugins (3 stars, last pushed 3d ago), licensed Apache-2.0. It adds 50 tokens to every session and 501 once invoked, about $0.0002 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 2026-09-04.
Other skills, from other repositories
detect-github-url
Detects when the user pastes or mentions a GitHub URL that may contain Claude skills or plugins. Triggers on messages containing github.com URLs, especially when user says things like "here's a repo", "check out this repo", "load this", "use these skills", "I found these skills", or simply pastes a github.com link.…
example-feature-generator
Generate boilerplate for new features following project conventions. Use when user says "create feature", "add feature", or "new feature scaffolding".
media-gemini-3-image-prompt
A prompt builder for Gemini 3 Pro Image, also known as Nano Banana Pro, Google's image-generation model. It expands a short request into five parts covering the subject, action, setting, composition, lighting, style, and text constraints.
commerce-jtbd-persona
An e-commerce customer-analysis skill that studies reviews and questions to identify why people buy and to create concrete customer profiles. JTBD means “jobs to be done”: the practical goal a customer is trying to accomplish.
data-realestate
A lookup tool for reported South Korean property transactions using Ministry of Land data. It covers sales and rental deals for apartments, officetels, multi-family homes, houses, and commercial or office properties.
design-sync-upload
An uploader for design-system files such as DESIGN.md, tokens, logos, fonts, and images into Claude Design. It can either use an authenticated connection or prepare a folder and guide for manual upload.