Ship read-only built-in workflows surfaced in the workflow list and selectable
like any workflow: 'Coding' (the existing execute->review->merge pipeline as a
graph), 'Quick fix' (no review), 'Review-heavy' (extra security gate), and
'Compound engineering' (plan -> implement -> review -> code-review gate ->
merge -> document, invoking ce-plan/ce-code-review/ce-compound skills). Built-ins
lead the list, resolve by id for selection, and reject edit/delete.
62aba2c095