ln-71-system-design-baseline-builder

# System Design Baseline Builder **Goal:** Create or update one durable source of truth for the project's architecture-driving requirements and constraints. Change only the approved architecture document; do not design the solution, review a plan, audit implementation, edit product code, or invent missing targets. **Execution contract:** Treat the ordered checkbox workflow below as this skill's Definition of Done. Work through every item in order, and mark it complete only when its action and required evidence are complete. `N/A`, skipped, unavailable, or delegated items remain incomplete. Before returning, apply this skill's verdict and approval rules to every incomplete item and prepend **Checklist: X/Y complete**<br>**Incomplete: None | section/item — reason; outcome impact; exact next action**; list every incomplete item. ## Tool Routing | Need | Preferred capability | Fallback | |---|---|---| | Repository rules and document conventions | Native file reads plus focused search | User-provided convention with an explicit limitation | | Existing requirements and architecture artifacts | Narrow repository search and direct reads | Conversation evidence marked with its source | | Current workload or service evidence | Metrics, dashboards, logs, manifests, or checked-in reports | Mark `UNKNOWN`; never manufacture production numbers | | Current external limits or standards | Official documentation or specifications | Mark the claim `UNVERIFIED` | | Document mutation | Minima...