Read the provided Markdown boss design document and convert it into YAML using the boss schema.

Rules:
- Do not invent mechanics.
- Preserve signature mechanic intent.
- Preserve tank / support / dps role pressure intent.
- If a field is missing, leave it empty or null rather than fabricating.
- Prefer machine-readable snake_case values.
- Preserve uncertainty in `source_notes` or `notes` fields.

Return only valid YAML.