mine-skill

mine-skill is a skill for Claude Code, Codex from richfrem/agent-plugins-skills. It costs 67 tokens per session (547 once invoked), scanned A, original, MIT.

A focused analysis workflow for one Agent Skill directory. It inventories the files, analyzes the skill, extracts patterns, and produces improvement suggestions.

In plain words
What is it for?
Use it when examining a specific skill folder for its structure, design patterns, and possible improvements.
Why use it?
It gives a detailed review of one skill without processing an entire plugin collection.

Skill for Claude CodeCodex

Part of the agent-scaffolders plugin — 33 skills, 2 plugins shipped together

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

Made for: Claude Code, Codex.

Or install agent-scaffolders, the plugin that ships this one along with the rest of its 33 skills, 2 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 mine-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/mine-skill.svg)](https://agentmods.dev/skills/richfrem/agent-plugins-skills/mine-skill)
Your own site
<a href="https://agentmods.dev/skills/richfrem/agent-plugins-skills/mine-skill"><img src="https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/mine-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 547 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 $0.00067 $0.00547
Opus 5 $0.00034 $0.00273
Sonnet 5 $0.00013 $0.00109
Haiku 4.5 $0.00007 $0.00055

Measured 2d ago against content hash 98fcaddc5f69, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

mine-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 2d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/inventory_plugin.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/mine-skill/SKILL.md · 64 lines

What it actually says

Dependencies

This skill requires Python 3.8+ and standard library only. No external packages needed.

To install this skill's dependencies:

pip-compile ./requirements.in
pip install -r ./requirements.txt

See ./requirements.txt for the dependency lockfile (currently empty — standard library only).


Mine Skill

Run the targeted analysis pipeline on a single Agent Skill. This allows for focused extraction and synthesis from isolated directories without processing an entire plugin.

What This Command Does

  1. Inventory — Enumerate the files within the specific skill directory.
  2. Analyze — Run the analyze-plugin skill, focused purely on this component.
  3. Extract — Pull design patterns and architecture choices from the skill.
  4. Synthesize — Generate improvement recommendations using synthesize-learnings.

Usage

/mine-skill <path-to-skill-directory>

Examples

# Analyze a specific skill within a knowledge plugin
/mine-skill claude-knowledgework-plugins/sales/skills/call-prep

# Analyze one of our own core skills
/mine-skill plugins\ reference/agent-scaffolders/skills/create-plugin

Execution Flow

  1. Invoke Analysis: The system triggers analyze-plugin operating in Single Skill Mode on the provided $ARGUMENTS.
  2. Execute Inventory: scripts/inventory_plugin.py runs against the skill path.

    Security scanning is enabled by default. Credential detection, network call detection, and environment variable checks run on all script files unless --no-security is passed.

  3. Pattern Matching: Checks against references/pattern-catalog.md and detects anti-patterns.
  4. Knowledge Synthesis: synthesize-learnings is invoked to map discovered patterns back to our core agent-scaffolders and agent-scaffolders.
  5. Output: Renders the analysis inline, highlighting the novel techniques implemented in the isolated skill.
Files

What ships with it

4 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. 2d ago First seen · 64 lines · 67 tokens per session scan A 98fcaddc5f69

Subscribe to this mod's changes

mine-skill is a skill published in the GitHub repository richfrem/agent-plugins-skills (6 stars, last pushed yesterday), licensed MIT. It adds 67 tokens to every session and 547 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.