Smart Upgrade

Pulls the latest claudesidian from GitHub and merges it into the user's vault, preserving customizations.

Layout assumptions (READ FIRST)

claudesidian stores skills under .agents/skills/<name>/SKILL.md as the canonical location. Symlinks live at .claude/skills/<name> and .pi/skills/<name> pointing back to canonical. Edit canonical, all consumers follow.

If the user is on a pre-conversion claudesidian (anything before the commands→skills migration) they will have .claude/commands/*.md instead and no .agents/skills/. Do not run a normal upgrade in that case — see "Migration from legacy layout" at the bottom of this file.

If the user's local repo has .agents/skills/ populated, proceed normally.