Web UI Implementation Plan Creation

Create an implementation plan in docs/plans/yyyymmdd-<task-name>.md with interactive context gathering. This plan is specialized for React web UI work — component decomposition, bottom-up build order, and visual design analysis are first-class concerns.

Step 0: Parse Intent and Gather Context

Before asking questions, understand what the user is working on:

1. Parse user's command arguments to identify intent:

   • "add feature Z" / "implement W" → feature development
   • "fix bug" / "debug issue" → bug fix plan
   • "refactor X" / "improve Y" → refactoring plan
   • "migrate to Z" / "upgrade W" → migration plan
   • generic request → explore current work

2. Launch Explore agent (via Task tool with subagent_type: Explore) to gather relevant context based on intent: