* test(#3797): the roadmapper must follow one write-first contract
* fix(#3797): make the roadmapper's role, output, and checklist match its write-first execution flow
The roadmapper contradicted itself: role blurb, output format, and
completion checklist described an approve-first flow while its execution
flow said "Write Files Immediately" with reactive-only revision (#3797).
The approval gate belongs to the ORCHESTRATOR — both callers read the
written ROADMAP.md, present it, and gate on approval (with an auto-mode
bypass a subagent cannot host) — so write-first is the contract.
All approve-first text now describes the write-then-return reality, the
old "Draft Presentation Format" (whose ## ROADMAP DRAFT header matched no
orchestrator branch) is folded into the ## ROADMAP CREATED structured
return as a preview block, and the duplicate checklist lines are merged.
A structural guard pins the single contract.
Emitted-Drift-Ack-Growth: gsd-roadmapper.md — #3797: +bytes — approve-first wording replaced with write-first descriptions; the DRAFT presentation template folded into the ROADMAP CREATED return as a preview block
* chore(#3797): changeset fragment (pr number backfilled after PR creation)
* chore(#3797): backfill changeset PR number (4008)
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Co-authored-by: sim <sim@local>
ac3668e4b7