Feature: dynamic command discovery for JSON-RPC and enhanced testing

run-tests.sh

@@ -88,6 +88,26 @@ EOF
   echo "quit"
 ) | ssh_mud smoketest@localhost
 
+# Test 7: JSON-RPC interface and dynamic command list
+# We need an active player for the login to succeed in mud-mcp style
+# (though list_commands doesn't require session, the MCP does login on startup)
+ssh_mud rpctest@localhost <<'EOF'
+1
+1
+quit
+EOF
+
+echo '{"_jsonrpc": "2.0", "method": "login", "params": {"username": "rpctest"}, "id": 1}' | nc -w 2 localhost 2223 > rpc_resp.json
+echo '{"_jsonrpc": "2.0", "method": "list_commands", "params": {}, "id": 2}' | nc -w 2 localhost 2223 >> rpc_resp.json
+
+if ! grep -q '"shop"' rpc_resp.json; then
+  echo "Error: 'shop' command missing from JSON-RPC list_commands"
+  cat rpc_resp.json
+  exit 1
+fi
+rm rpc_resp.json
+
 # Cleanup (trap handles server kill)
 ./target/debug/mudtool -d "$TEST_DB" settings set registration_open true
 ./target/debug/mudtool -d "$TEST_DB" players delete smoketest
+./target/debug/mudtool -d "$TEST_DB" players delete rpctest