| name | pdf-diagram-reasoning |
| description | Reason over PDFs, architecture diagrams, flowcharts, and whiteboard photos — extracting entities, relationships, and decisions with page-grounded citations. |
| argument-hint | ["document set","diagram type","target extraction","citation format"] |
| allowed-tools | Read, Write |
| model | claude-fable-5 |
| capability | Multimodal |
PDF & Diagram Reasoning
Claude 5 Mythos + Fable skill — Multimodal. Optimised for Claude 5 Mythos (reasoning) and Claude 5 Fable (action / tool use), and backward-compatible with Claude Sonnet 4.5 and Opus 4.
TL;DR
Contracts, architecture diagrams, and whiteboard photos are first-class inputs for Claude 5. This skill sets the extraction schema and citation format so every extracted fact points back to a page and region.
When to use this skill
- You are working with Claude 5 Mythos or Fable (or a downstream vendor exposing them).
- The task benefits from multimodal — do not use for tasks a smaller model handles cheaply.