Use when the user wants something explained properly and kept in the vault - an architecture decision, a plan you just produced, a git merge or diff, an incident, an error, a design trade-off. Triggers include "claudesplain this", "explain this decision", "write this up", "document this plan", "what does this merge actually do", or any request to turn work-in-progress into a reference note. Produces one dense, scannable Obsidian note. Do not use for quick inline answers the user did not ask to keep.
