loreto-mcp

Turn any YouTube video, article, PDF, or image into a reusable Claude Code skill — without leaving your editor.

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What it does

Loreto analyzes a content source and extracts structured skill packages that Claude Code can apply to future tasks. Each skill contains:

• SKILL.md — Principles, failure modes, implementation steps, and architectural patterns
• README.md — Overview and usage context
• Reference files — Supporting patterns and data structures
• Test script — Runnable validation for the skill's core concepts

Save skills to .claude/skills/ and Claude picks them up automatically on relevant tasks — reducing hallucinations, token usage, and re-explaining the same concepts over and over.

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Sample skills

The sample-skills/ folder contains real skills generated by Loreto from a single technical video on hybrid AI architecture. Browse them to see exactly what you get:

Skill	What it teaches
designing-hybrid-context-layers	Architect hybrid retrieval systems that combine vector search, graph traversal, and structured data
temporal-reasoning-sleuth	Enable agents to trace decision chains and reconstruct causal sequences across long time horizons
synthesizing-institutional-knowledge	Capture and query organizational knowledge in a way AI agents can reliably reason over
diagnosing-rag-failure-modes	Identify and fix the 7 most common RAG pipeline failure patterns
routing-work-across-ai-harnesses	Dynamically route tasks to the right AI harness based on task type and context
evaluating-ai-harness-dimensions	Score and compare AI harness options across speed, cost, accuracy, and controllability
detecting-harness-lockin	Spot vendor lock-in signals early and design for portability
benchmarking-ai-agents-beyond-models	Measure agent performance at the system level, not just model level
auditing-intelligence-context-fit	Audit whether the right intelligence layer is solving the right problem

Each folder includes the full SKILL.md, README.md, and any reference files — ready to drop into .claude/skills/.

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Setup

1. Get an API key

Sign up at loreto.io to get your free API key (lor_...).

2. Install

pip install loreto-mcp

Or run directly without installing (requires uv):

uvx loreto-mcp

3. Configure Claude Code

User-scoped (works across all your projects) — add to ~/.claude/mcp.json:

{
  "mcpServers": {
    "loreto": {
      "command": "uvx",
      "args": ["loreto-mcp"],
      "env": {
        "LORETO_API_KEY": "lor_..."
      }
    }
  }
}

Project-scoped (shared with your team) — add to .mcp.json at your project root:

{
  "mcpServers": {
    "loreto": {
      "command": "uvx",
      "args": ["loreto-mcp"],
      "env": {
        "LORETO_API_KEY": "${LORETO_API_KEY}"
      }
    }
  }
}

4. Verify

Restart Claude Code and run /mcp — you should see loreto listed with generate_skills and get_quota.

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Usage

Once connected, just ask Claude Code naturally:

Use Loreto to extract skills from https://www.youtube.com/watch?v=JYcidOS9ozU

Extract skills from this article and save them to .claude/skills/

Check my Loreto quota before we start.

Claude calls generate_skills, receives the full skill package, and can write the files directly to your project.

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Available tools

Tool	Description
generate_skills	Extract ranked skill packages from a URL. Returns full file contents ready to save.
get_quota	Check calls used, monthly limit, and plan for your API key.

generate_skills parameters

Parameter	Type	Default	Description
source	str	required	URL to analyze — YouTube, article, public PDF, or image
source_type	str	"auto"	"auto" | "youtube" | "article" | "pdf" | "image"
test_language	str	"python"	"python" | "typescript" | "javascript"
include_visuals	bool	true	Embed Mermaid diagrams in SKILL.md
context	str	null	1–3 sentence hint to guide extraction (max 500 chars)
themes_to_process	list[str]	null	Follow-up call: skill names from a previous response's queued themes

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Supported sources

Source	Notes
YouTube videos	Up to 60 minutes
Web articles	Any publicly accessible URL
PDFs	Up to 100 pages
Images	Diagrams, whiteboards, slides (up to 20 MB)

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Configuration

Environment variable	Required	Default	Description
LORETO_API_KEY	Yes	—	Your Loreto API key (lor_...)
LORETO_BASE_URL	No	https://api.loreto.io	Override for local development

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Plans

Free and paid plans available. See loreto.io/pricing for current limits.

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License

MIT