Update Design Document

.claude/docs/DESIGN.md

Note: This skill explicitly invokes the same workflow as the

design-tracker

skill. Use this when you want to force a design document update.

Workflow

1. Read existing

   .claude/docs/DESIGN.md

2. Extract decisions/information from the conversation
3. Update the appropriate section
4. Add entry to Changelog with today's date

Section Mapping

Update Format

### Key Decisions

#### {Decision Title} ({Date})

**Context**: {Why this decision was needed}
**Decision**: {What was decided}
**Rationale**: {Why this option was chosen}

Changelog Entry

## Changelog

### {Date}
- {Brief description of what was recorded}

Language

• Document content: English (technical), Japanese OK for descriptions
• User communication: Japanese