| name | large-codebase-analysis |
| description | Load a full monorepo into Claude 5 Mythos and produce dependency graphs, dead-code lists, architectural summaries, and safe refactor plans that respect cross-module contracts. |
| argument-hint | ["repo path","languages","target artefact","exclude globs"] |
| allowed-tools | Read, Bash |
| model | claude-fable-5 |
| capability | Long-Context Reasoning |
Whole-Codebase Analysis with Claude 5
Claude 5 Mythos + Fable skill — Long-Context Reasoning. 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
Feed Claude 5 the entire repo — not summaries — and get an architect-grade map: layered dependency graph, cyclic imports, hotspot files, dead exports, and a phased refactor plan sized for a single sprint.
When to use this skill
- You are working with Claude 5 Mythos or Fable (or a downstream vendor exposing them).
- The task benefits from — do not use for tasks a smaller model handles cheaply.