write-sdd - Create and maintain modular software design documents
Transforms a conversation or PRD into a modular Software Design Document, or updates an existing SDD with module status and design drift.
Tags
Updated: 2026-10-03Capabilities
Typical Inputs
Typical Outputs
What this skill does
- Detect generate or update mode
- Synthesize conversation into an SDD
- Ground designs in the codebase
- Decompose features into vertical modules
- Map dependencies and compute waves
- Write modular SDD files
- Update module status and design drift
- Validate the SDD checklist
- Report implementation handoff schedule
Inputs
- Current conversation
- Optional PRD
- Referenced codebase
- Existing SDD
- Optional output path
Outputs
- SDD Markdown file
- Handoff schedule message
- Updated module statuses
- Reconciled design decisions
Requirements
- Project filesystem write access