Opening a menu or the command palette looked up command ids by scanning the whole command
list. The registry now keeps its ordered specs and an id-to-index map in one OnceLock (first
match wins for a duplicate id), and is_live caches the shell command ids in a set. A batch of
917 lookups drops from 0.157 ms to 0.013 ms.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
