docs: Grok test write via relay — pipeline confirmed bidirectional ✅

agent-comms/sync-board.md

@@ -16,3 +16,13 @@
 - Confirm write path works (this entry)
 - Move to testing chess-tutor on port 3050
 - Set up token sharing for fully autonomous writes
+
+---
+
+### 2026-06-20 — Grok Test Write via Relay ✅
+
+**Pipeline status:** READ ✅ | WRITE (via Leonard relay) ✅ | Full bidirectional loop confirmed operational.
+
+Grok can read the board via MCP `read_file`. Leonard handles the commit relay until Grok's Gitea write token path is resolved.
+
+**Next move:** Fire up the chess tutor on port 3050.