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cpv-create-mono-agent

cpv-create-mono-agent is a skill for Claude Code from Emasoft/claude-plugins-validation. It costs 109 tokens per session (1,730 once invoked), scanned A, original, MIT.

A generator for an all-in-one Claude Code agent that lists every required skill by name and routes tasks to those skills. The skills remain separate files, so they can be shared and updated independently.

In plain words
What is it for?
Use it to build an agent for every skill in a plugin or for the complete set of skills needed by one existing agent.
Why use it?
It creates an agent that has its required skills available from the first turn without copying their contents into the agent. Keeping one source file for each skill avoids outdated duplicate copies.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions subagents; mentions Claude Code.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the claude-plugins-validation plugin — 52 skills, 14 commands, 14 agents, 10 plugins shipped together

not rated 4 yesterday A scan 109 tokens original MIT
View the source file Emasoft/claude-plugins-validation
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Emasoft/claude-plugins-validation
Claude Code
/plugin install claude-plugins-validation

Made for: Claude Code.

Or install claude-plugins-validation, the plugin that ships this one along with the rest of its 52 skills, 14 commands, 14 agents, 10 plugins.

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 cpv-create-mono-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/emasoft/claude-plugins-validation/cpv-create-mono-agent.svg)](https://agentmods.dev/skills/emasoft/claude-plugins-validation/cpv-create-mono-agent)
Your own site
<a href="https://agentmods.dev/skills/emasoft/claude-plugins-validation/cpv-create-mono-agent"><img src="https://agentmods.dev/badge/skills/emasoft/claude-plugins-validation/cpv-create-mono-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,730 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00109 $0.01730
Opus 5 $0.00055 $0.00865
Sonnet 5 $0.00022 $0.00346
Haiku 4.5 $0.00011 $0.00173

Measured 6d ago against content hash 618f6fd524e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

cpv-create-mono-agent 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 6d 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/cpv-create-mono-agent/SKILL.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

cpv-create-mono-agent

Overview

Generates an ALL-IN-ONE AGENT: its skills: frontmatter lists every skill it needs BY NAME, and its body is the routing layer that says WHEN to reach for each one. That frontmatter list IS the preload — Claude Code injects each named skill's FULL content into every invocation's cached prefix — so the agent is ready from turn 1 and never has to fetch a skill mid-task.

A skill's content is NEVER copied into the agent. Not concatenated, not duplicated, not embedded. The reason is single-source-of-truth: a skill must stay INDEPENDENT so it can be shared by many agents and edited, fixed, or updated ONCE. An inlined copy is a second source that silently rots the moment the original changes, and with N agents inlining it there are N stale copies and no signal that any drifted. Referencing costs nothing, because the preload already puts the content in context.

SUPERSEDED — do not expect the old behaviour. Until TRDD-XUNZQ70I this generator CONCATENATED every skill body into one giant agent. That construction is now forbidden and there is exactly ONE version of the mechanism — no inlining path behind a flag.

The three architectures (canonical vocabulary)

Architecture skills: lists Skills execute in Build it with
ALL-IN-ONE every skill it needs the same agent this skill
ONE-FOR-ALL every skill it needs a separate subagent per skill cpv-create-micro-agents-workflow
PLUGIN-OMNI the plugin's the-skills-menu + the companion resolved at runtime from the menu convert_agent.py --to plugin-omni

ALL-IN-ONE and ONE-FOR-ALL differ in exactly ONE thing: WHERE a skill runs.

Prerequisites

  • uv on PATH
  • Target plugin path with .claude-plugin/plugin.json and a skills/ directory
  • For the agent-scoped path: the source agent .md file

Instructions

Pick the scope first — they use different scripts:

A. PLUGIN-WIDE (every non-meta skill the plugin ships):

Read the full file on GitHub · 135 lines

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. 6d ago First seen · 135 lines · 109 tokens per session scan A 618f6fd524e3

Subscribe to this mod's changes

cpv-create-mono-agent is a skill published in the GitHub repository Emasoft/claude-plugins-validation (4 stars, last pushed yesterday), licensed MIT. It adds 109 tokens to every session and 1,730 once invoked, about $0.0005 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 2026-08-31.

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