Core frame builtins are infrastructure the shell can't function
without. Content extensions (editor, claude, canvas, etc.) are
bundled but architecturally removable — users swap the surface,
not the data.
Removes builtin.jira stub: Jira belongs as a third-party
extension, not a frame builtin. Git is a split component —
daemon-side process stays in frame, UI surfaces are extensions.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude
4f5d97ebc5