docs: present AI strategy as a diagram-first story

docs/strategy/roadmap.mdx

@@ -2,11 +2,28 @@
 id: roadmap
 title: Roadmap
 description: Evidence-gated phases, no promised dates or budgets.
+hide_table_of_contents: true
 ---
 
+import ArchifyDiagram from '@site/src/components/ArchifyDiagram';
 
 <div className="strategy-content">
 
+**TO-BE · Target operating model — not installed controls or company results.**
+
+## What must be true before widening the rollout?
+
+Advance by exit evidence, not promised dates or usage volume. Each stage can hold, narrow or stop; changed client, data or authority boundaries reopen earlier gates.
+
+<ArchifyDiagram name="strategy-roadmap" title="Foundation, pilot, reliable distribution, coordination and departmental expansion have exit gates" story />
+
+- **Start bounded:** named people, lawful data handling and a reproducible baseline precede the pilot.
+- **Prove recovery before coordination:** verified versions, revocation and human takeover are prerequisites.
+- **Expand by department:** accepted outcomes, guardrails, total cost and experience justify continuation; sensitive decisions remain human.
+
+<details>
+<summary>Stage-by-stage entry evidence, work, exit gates and hold conditions</summary>
+
 **TO-BE · Target operating model.** Introduction depends on the [roadmap gates](./roadmap.mdx); these pages do not describe installed controls or measured company results.
 
 ### Foundation
@@ -51,4 +68,8 @@ description: Evidence-gated phases, no promised dates or budgets.
 
 There are no invented launch dates, budgets, staffing commitments or guaranteed gains. Phase gates permit narrowing or stopping. Re-evaluate earlier phases when the underlying client, provider, data scope or authority changes.
 
+</details>
+
+**Next:** [Return to the strategy destination →](./index.mdx)
+
 </div>