Add operator Mentra memory browser

docs/grid-agent-llm.md

@@ -36,6 +36,9 @@ learning without displacing the command being handled.
 Runtime records use `HybridRuntimeStore`: conversation/runtime state is stored
 in `runtime.sqlite`, with the associated Mentra memory store and transcript,
 task, team, and workspace paths under the configured state directory.
+`memory-agents.json` atomically persists the authenticated avatar, logical
+agent key, and actual Mentra agent ID for operator browsing. This explicit
+mapping is restored independently of generated agent names.
 
 ## Tools and autonomous safety review