update-design

name	update-design
description	Use when the user says "update the design doc", "sync DESIGN.md", "sync ARC42STORIES.MD", "reflect code changes in the design", or invokes /update-design. Also invoked by git-commit when commits affect architecture. Routes to the appropriate design doc workflow based on project type.

Update Design Document

Reads project type, then loads the language-specific design sync workflow. All types update a living design document to reflect current architecture — only the document format and detection logic differ.

Step 1 — Detect project type

python3 ~/.claude/skills/project-init/ctx.py

Read PROJECT_TYPE from the output. Also read HAS_ARC42STORIES for design doc routing.

Extract: java | ts | python | generic

Step 2 — Load workflow

Project type	File to read
java	~/.claude/skills/update-design/java.md
ts	~/.claude/skills/update-design/typescript.md
python	~/.claude/skills/update-design/python.md
generic	~/.claude/skills/update-design/typescript.md (lightweight fallback)

Read the file, then execute the workflow it describes.

Skill Chaining

Invoked by: [git-commit] alongside [update-claude-md]; [adr] suggests running this when an ADR documents a new component

Invokes: None (terminal skill in the chain)

Complements: adr — captures point-in-time decisions alongside this skill's living-doc updates