/plan-feature

Sprint planning - create or continue .plans/ with risk-prioritized tasks

# Plan Feature

Sprint planning for `.plans/<project>/` - same rigor whether starting fresh or continuing.

**Request:** $ARGS

## Detect Mode

Check if `.plans/<project>/plan.md` exists:
- **No** → Initial sprint
- **Yes** → Continuing sprint

## Process

### 1. Load Context

**Initial:** Start fresh with the request.

**Continuing:** Read existing state and summarize:
- `plan.md` - architecture decisions, completed milestones, deferrals
- `completed/*.md` - learnings from finished tasks
- What was accomplished, learned, and what's still deferred

### 2. Invoke Technical-Planning Skill

Ap...