open

# dev.open - Spec-based Draft PR Creation

## Purpose

Create Draft PR based on Spec document. Following **PR = Single Source of Truth** principle, PR becomes the center of all work state.

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## Reference

- **PR Body template**: `${baseDir}/references/pr-body-template.md`

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## Input

| Input | Action |
|-------|------|
| `/open user-auth` | Create PR based on `specs/user-auth.md` |
| `/open` | Use most recent spec or ask user |

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## Prerequisites

1. Spec file exists: `specs/<name>.md`
2. gh CLI authenticated: `gh auth status`

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## Workflow

### Step 1: Verify Spec Exists
```
Check if specs/<name>.md exists
If not → Error: "Spec not found. Run '/specify <name>' first."
```

### Step 2: Check Existing PR
```
Check if PR exists for feat/<name> branch
If exists → Error: "PR already exists for feat/<name>"
```

### Step 3: Create and Push Branch
```
Create feat/<name> branch from main → Push to remote
```

### Step 4: Create Draft PR
Reference `pr-body-template.md` to create Draft PR.

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## Output

**Success**:
```
✅ PR #123 created successfully
   View: gh pr view 123 --web
```

**Failure**:
```
Error: Spec not found at specs/user-auth.md
```

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## Related Commands

| Command | Description |
|---------|------|
| `/specify <name>` | Write Spec document (run before open) |
| `/state queue <PR#>` | Add to auto-execution queue |
| `/execute <PR#>` | Start implementation |