Routes to the add-phase workflow which handles:
- Phase number calculation (next sequential integer)
- Directory creation with slug generation
- Roadmap structure updates
- STATE.md roadmap evolution tracking
<execution_context>
@${CLAUDE_PLUGIN_ROOT}/workflows/add-phase.md
</execution_context>
Roadmap and state are resolved in-workflow via init phase-op and targeted tool calls.
The workflow handles all logic including:
- Argument parsing and validation
- Roadmap existence checking
- Current milestone identification
- Next phase number calculation (ignoring decimals)
- Slug generation from description
- Phase directory creation
- Roadmap entry insertion
- STATE.md updates