Propagate Design Change

When a GDD changes, architectural decisions written against it may no longer be valid. This skill finds every affected ADR, compares what the ADR assumed against what the GDD now says, and guides the user through resolution.

Usage: /propagate-design-change design/gdd/combat-system.md

1. Validate Argument

A GDD path argument is required. If missing, fail with:

"Usage: /propagate-design-change design/gdd/[system].md Provide the path to the GDD that was changed."

Verify the file exists. If not, fail with:

"[path] not found. Check the path and try again."