skill-builder

skill-builder is a skill for Claude Code, Codex from yusufkaraaslan/skill-seekers-plugin. It costs 38 tokens per session (769 once invoked), scanned A, a copy of skill-builder, MIT.

A skill-building workflow that turns documentation, code repositories, PDFs, videos, and other sources into instructions an AI agent can use. It also supports updating those instructions and exporting them to vector databases, which store searchable knowledge.

In plain words
What is it for?
Creating or updating skills from documentation sites, GitHub repositories, PDFs, videos, codebases, notebooks, configuration files, and similar sources.
Why use it?
It removes the manual work of collecting source material and reorganising it into a format suitable for an AI agent.

Skill for Claude CodeCodex

Part of the skill-seekers plugin — 1 skill, 3 commands 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/yusufkaraaslan/skill-seekers-plugin/skill-builder
Any agent
npx skills add yusufkaraaslan/skill-seekers-plugin --skill skill-builder
Clone the repo
git clone --depth 1 https://github.com/yusufkaraaslan/skill-seekers-plugin

Made for: Claude Code, Codex.

Or install skill-seekers, the plugin that ships this one along with the rest of its 1 skill, 3 commands.

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 skill-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/yusufkaraaslan/skill-seekers-plugin/skill-builder.svg)](https://agentmods.dev/skills/yusufkaraaslan/skill-seekers-plugin/skill-builder)
Your own site
<a href="https://agentmods.dev/skills/yusufkaraaslan/skill-seekers-plugin/skill-builder"><img src="https://agentmods.dev/badge/skills/yusufkaraaslan/skill-seekers-plugin/skill-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 769 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 94% copy Near-identical to another mod 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 $0.00038 $0.00769
Opus 5 $0.00019 $0.00385
Sonnet 5 $0.00008 $0.00154
Haiku 4.5 $0.00004 $0.00077

Measured 4d ago against content hash b30c8d664b36, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-builder 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 4d 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.

Origin

This is a copy

94% identical to skill-builder — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/skill-builder/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Builder

You have access to the Skill Seekers MCP server which provides 35 tools for converting knowledge sources into AI-ready skills.

When to Use This Skill

Use this skill when the user:

  • Wants to create an AI skill from a documentation site, GitHub repo, PDF, video, or other source
  • Needs to convert documentation into a format suitable for LLM consumption
  • Wants to update or sync existing skills with their source documentation
  • Needs to export skills to vector databases (Weaviate, Chroma, FAISS, Qdrant)
  • Asks about scraping, converting, or packaging documentation for AI

Source Type Detection

Automatically detect the source type from user input:

Input Pattern Source Type Tool to Use
https://... (not GitHub/YouTube) Documentation scrape_docs
owner/repo or github.com/... GitHub scrape_github
*.pdf PDF scrape_pdf
YouTube/Vimeo URL or video file Video scrape_video
Local directory path Codebase scrape_codebase
*.ipynb, *.html, *.yaml (OpenAPI), *.adoc, *.pptx, *.rss, *.1-.8 Various scrape_generic
JSON config file Unified Use config with scrape_docs
  1. Detect source type from the user's input
  2. Generate or fetch config using generate_config or fetch_config if needed
  3. Estimate scope with estimate_pages for documentation sites
  4. Scrape the source using the appropriate scraping tool
  5. Enhance with enhance_skill if the user wants AI-powered improvements
  6. Package with package_skill for the target platform
  7. Export to vector DB if requested using export_to_* tools

Available MCP Tools

Config Management

  • generate_config — Generate a scraping config from a URL
  • list_configs — List available preset configs
  • validate_config — Validate a config file

Scraping (use based on source type)

  • scrape_docs — Documentation sites
  • scrape_github — GitHub repositories
  • scrape_pdf — PDF files
  • scrape_video — Video transcripts
  • scrape_codebase — Local code analysis
  • scrape_generic — Jupyter, HTML, OpenAPI, AsciiDoc, PPTX, RSS, manpage, Confluence, Notion, chat

Read the full file on GitHub · 70 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. 4d ago First seen · 70 lines · 38 tokens per session scan A b30c8d664b36

Subscribe to this mod's changes

skill-builder is a skill published in the GitHub repository yusufkaraaslan/skill-seekers-plugin (16 stars, last pushed 5mo ago), licensed MIT. It adds 38 tokens to every session and 769 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to skill-builder, differing in 2 lines, and is treated as a copy.

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