Add current platform capabilities section (March 2026)

README.md

@@ -25,6 +25,52 @@ The agent is the only authority allowed to mutate the filesystem.
 
 ---
 
+# Current Platform Capabilities (March 2026)
+
+## Game Server Control
+
+- Start / Stop / Restart
+- Crash detection via process exit
+- Intentional stop detection (no false crash increments)
+- Readiness probing (Minecraft ping)
+- Console streaming via WebSocket + PTY
+- Crash metadata recorded by the agent
+
+## File System Operations
+
+- File browser
+- Safe editing of server files
+- Shadow backups (.zlh-shadow)
+- Upload support:
+  - mods/*.jar
+  - world/datapacks/*.zip
+- Upload provenance tracking via `.zlh_metadata.json`
+
+## Observability
+
+Agent `/status` endpoint exposes:
+
+- `state`
+- `crashCount`
+- `lastCrashTime`
+- `lastCrashExitCode`
+- `lastCrashSignal`
+- `lastCrashUptimeSeconds`
+- `lastCrashLogTail`
+
+## Notes System
+
+Server instances support persistent notes stored in the platform database and editable from the portal UI.
+
+## Console System
+
+- xterm.js frontend
+- WebSocket transport
+- PTY session managed by the agent
+- Reconnect handled client-side — no page refresh required
+
+---
+
 # File System Capabilities (Current State)
 
 ## Read