review_deliverables was written at onboarding and shown in Settings but
nothing ever consumed it - Co-Founder mode silently behaved like AI CEO
mode for output. Now every write_deliverable and create_document in a
review_deliverables org files a pending deliverable_review approval tied to
the file or document, and the tool tells the agent their work is queued for
board review; AI CEO mode keeps shipping without review, which is that
mode's contract. Kickoff and worker briefings also catch up with the
conversation model: managers brief each report in a direct message with one
company-wide post in #general, and workers raise blockers with their
manager over DM instead of flooding department channels. Three
execution-mode contract tests pin deliverable review, no-review autonomy,
and the hire-approval split.