Add AGR wallet integration roadmap

Docs/Ops/HANDOFF.md

@@ -14,6 +14,32 @@
 - The old `/home/nathan/agrarian/dev/ROADMAP.md` is coin/wallet-specific and
   should not be treated as the game roadmap.
 
+## AGR Wallet Integration Roadmap Update - 2026-05-21
+
+- Nathan clarified that AGR coin is a major investor hook for Agrarian:
+  eventually players should be able to use AGR both in game and in real life
+  wherever AGR is accepted.
+- Roadmap direction added:
+  - `0.2.F Simple Economy`: start with non-custodial wallet linking and
+    read-only AGR balance display in the HUD.
+  - `0.3.A Identity And Reputation`: prove wallet ownership with signed
+    messages or equivalent non-custodial proof.
+  - `0.3.B Trade And Contracts`: add player-to-player AGR payment requests,
+    external-wallet payment, server confirmation verification, and transaction
+    receipt records.
+  - `0.5.C Taxation And Public Works`: consider AGR-backed settlement treasury
+    only after earlier verification, audit, and legal steps are mature.
+  - Appendix `D. AGR Integration`: expanded into phases plus outside-game
+    dependencies.
+- Important guardrail:
+  do not store player private keys in the Unreal client, dedicated server, or
+  ordinary player profile during MVP. Start by linking public addresses and
+  querying balances from a trusted backend.
+- Outside-game dependencies required before full spending:
+  trusted AGR node/indexer/API, backend balance and transaction verifier,
+  wallet signing/payment UX through Qt wallet, website wallet, or companion
+  wallet, plus legal/compliance review for real-value marketplace use.
+
 ## Gitea Container Repair - 2026-05-20
 
 - Gitea is hosted on Unraid as Docker container `Gitea`.