Tested the client against 1.21.11 on .net 10. Created a integration testing skill (end-to-end).

.skills/mcc-integration-testing/SKILL.md

@@ -0,0 +1,56 @@
+---
+name: mcc-integration-testing
+description: Repeatable local offline integration testing for Minecraft Console Client against a local Minecraft Java server. Use this whenever the user wants to validate MCC end-to-end against a local server, switch the server to persistent offline mode, run chat or server commands through FileInputBot, exercise inventory/entity handling, or perform deeper smoke testing with mobs, particles, sounds, TNT, and operator actions.
+---
+
+# MCC Integration Testing
+
+Use this skill for local MCC validation against the user's `mc-*` and `mcc-*` shell helpers.
+
+## Workflow
+
+1. Source `~/.zshrc` in command invocations.
+2. Do not read `~/.zshrc` directly.
+3. Ensure the target server is configured for persistent offline testing:
+   - `online-mode=false`
+   - `enforce-secure-profile=false`
+   - `enable-rcon=true`
+   - `rcon.password=test123`
+4. Build with `mcc-build`.
+5. Run the scripted scenario with `scripts/run_full_spectrum_test.sh`.
+6. Summarize the evidence with `scripts/summarize_test_run.sh`.
+
+## Required Preconditions
+
+- Server jar exists under `~/Minecraft/Servers/<version>/server.jar`
+- `eula.txt` contains `eula=true`
+- Repo root `MinecraftClient.ini` is the offline MCC test profile
+- The MCC config round-trip issue must be fixed before relying on repeated launches
+
+## Scripts
+
+- `scripts/ensure_offline_server.sh`
+  - Generates `server.properties` if missing
+  - Applies persistent offline and RCON settings
+- `scripts/run_full_spectrum_test.sh`
+  - Builds MCC
+  - Starts server and MCC
+  - Runs the full-spectrum scenario
+  - Verifies key MCC and server log assertions
+- `scripts/summarize_test_run.sh`
+  - Prints the most relevant evidence from the latest run directory
+
+## Scenario Coverage
+
+The scripted run should cover:
+
+- offline join
+- MCC-originated chat
+- MCC-originated slash command
+- internal MCC commands such as `health`, `list`, `inventory`, and `entity`
+- OP + creative mode
+- passive and hostile mob spawns
+- representative sound and particle events
+- TNT / explosion handling
+
+If a command syntax needs to be checked, use `references/command-matrix.md`.

.skills/mcc-integration-testing/evals/evals.json

@@ -0,0 +1,39 @@
+{
+  "skill_name": "mcc-integration-testing",
+  "evals": [
+    {
+      "id": 1,
+      "prompt": "Configure the local 1.21.11 MCC test server for persistent offline mode, then run a deep MCC integration test covering chat, operator actions, creative inventory, entity tracking, sounds, particles, and TNT.",
+      "expected_output": "The server is left in offline mode with RCON enabled, MCC joins successfully, and the run reports clear pass or fail evidence from both MCC and server logs.",
+      "files": [],
+      "expectations": [
+        "The workflow sources ~/.zshrc without reading it directly.",
+        "The server is configured with online-mode=false and enable-rcon=true.",
+        "The run uses both mc-rcon and mcc-cmd.",
+        "The result includes evidence from MCC output and server logs."
+      ]
+    },
+    {
+      "id": 2,
+      "prompt": "Validate that MCC still works after a runtime or framework change by performing a repeatable offline smoke test against the local vanilla server and exercising entity and inventory handling.",
+      "expected_output": "The response runs the repeatable local workflow, checks for a successful join, verifies inventory and entity commands, and calls out any configuration or protocol regression.",
+      "files": [],
+      "expectations": [
+        "The workflow builds MCC before running the server scenario.",
+        "The workflow checks inventory and entity handling explicitly.",
+        "The response flags config reload failures as regressions."
+      ]
+    },
+    {
+      "id": 3,
+      "prompt": "Use the local MCC testing workflow to run a full-spectrum client/server exercise and summarize the important evidence only.",
+      "expected_output": "The response runs the scripted scenario and returns a concise summary with pass/fail status, affected commands, and log evidence.",
+      "files": [],
+      "expectations": [
+        "The workflow uses the scripted test runner.",
+        "The summary includes join status, MCC command coverage, and server-side effects.",
+        "The summary points to the saved log locations."
+      ]
+    }
+  ]
+}

.skills/mcc-integration-testing/references/command-matrix.md

@@ -0,0 +1,53 @@
+# Command Matrix
+
+This skill uses a fixed set of stable commands for local offline integration testing.
+
+## MCC-side commands via `mcc-cmd`
+
+- `health`
+- `list`
+- `inventory player list`
+- `/gamemode creative`
+- `inventory creativegive 36 Diamond 16`
+- `entity`
+- `/time query daytime`
+- `smoke_test_from_mcc_full_spectrum`
+
+Notes:
+- Lines starting with `/` are sent to the server as chat/commands.
+- Non-slash lines are treated as MCC internal commands first, then fall back to chat.
+
+## Server-side commands via `mc-rcon`
+
+- `op CursorBot`
+- `gamerule sendCommandFeedback true`
+- `gamerule logAdminCommands true`
+- `time set day`
+- `weather clear`
+
+## Representative entity coverage
+
+- `execute as CursorBot at @s run summon minecraft:cow ~2 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:zombie ~4 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:creeper ~6 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:skeleton ~8 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:villager ~-2 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:allay ~-4 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:armor_stand ~ ~ ~2`
+
+## Representative particle coverage
+
+- `execute as CursorBot at @s run particle minecraft:happy_villager ~ ~1 ~ 0.5 0.5 0.5 0 12 force`
+- `execute as CursorBot at @s run particle minecraft:end_rod ~ ~1 ~ 0.5 0.5 0.5 0.01 20 force`
+- `execute as CursorBot at @s run particle minecraft:explosion ~ ~1 ~ 0 0 0 0 1 force`
+- `execute as CursorBot at @s run particle minecraft:totem_of_undying ~ ~1 ~ 0.5 0.5 0.5 0.1 20 force`
+
+## Representative sound coverage
+
+- `execute as CursorBot at @s run playsound minecraft:entity.lightning_bolt.thunder master CursorBot ~ ~ ~ 1 1 0`
+- `execute as CursorBot at @s run playsound minecraft:block.note_block.bell master CursorBot ~ ~ ~ 1 1 0`
+
+## Explosion coverage
+
+- `execute as CursorBot at @s run summon minecraft:tnt ~3 ~ ~`
+- `execute as CursorBot at @s run summon minecraft:tnt ~6 ~ ~`

.skills/mcc-integration-testing/scripts/ensure_offline_server.sh

@@ -0,0 +1,84 @@
+#!/usr/bin/env zsh
+set -euo pipefail
+
+set +eu
+source ~/.zshrc
+set -eu
+
+VERSION="${1:-1.21.11-Vanilla}"
+SERVER_DIR="${MCC_SERVERS:?}/$VERSION"
+PROPS_FILE="$SERVER_DIR/server.properties"
+SESSION_NAME="mc-${VERSION//./_}"
+
+if [[ ! -d "$SERVER_DIR" ]]; then
+    echo "Server directory not found: $SERVER_DIR" >&2
+    exit 1
+fi
+
+if [[ ! -f "$SERVER_DIR/eula.txt" ]] || ! grep -Eq '^eula=true$' "$SERVER_DIR/eula.txt"; then
+    echo "Missing accepted EULA in $SERVER_DIR/eula.txt" >&2
+    exit 1
+fi
+
+server_running() {
+    mc-list | grep -Fq "$SESSION_NAME"
+}
+
+wait_for_server_ready() {
+    local timeout="${1:-60}"
+    local elapsed=0
+    while (( elapsed < timeout )); do
+        if mc-log "$VERSION" 200 2>/dev/null | grep -Fq "Done ("; then
+            return 0
+        fi
+        sleep 1
+        ((elapsed += 1))
+    done
+    echo "Timed out waiting for $VERSION to become ready" >&2
+    return 1
+}
+
+wait_for_server_stop() {
+    local timeout="${1:-60}"
+    local elapsed=0
+    while (( elapsed < timeout )); do
+        if ! server_running; then
+            return 0
+        fi
+        sleep 1
+        ((elapsed += 1))
+    done
+    echo "Timed out waiting for $VERSION to stop" >&2
+    return 1
+}
+
+upsert_property() {
+    local key="$1"
+    local value="$2"
+
+    if grep -Eq "^${key}=" "$PROPS_FILE"; then
+        sed -i "s#^${key}=.*#${key}=${value}#" "$PROPS_FILE"
+    else
+        printf '%s=%s\n' "$key" "$value" >> "$PROPS_FILE"
+    fi
+}
+
+if [[ ! -f "$PROPS_FILE" ]]; then
+    mc-start "$VERSION"
+    wait_for_server_ready
+    mc-stop "$VERSION"
+    wait_for_server_stop
+fi
+
+if server_running; then
+    mc-stop "$VERSION"
+    wait_for_server_stop
+fi
+
+upsert_property "online-mode" "false"
+upsert_property "enforce-secure-profile" "false"
+upsert_property "enable-rcon" "true"
+upsert_property "rcon.port" "25575"
+upsert_property "rcon.password" "test123"
+
+echo "Configured $VERSION for persistent offline testing"

.skills/mcc-integration-testing/scripts/run_full_spectrum_test.sh

@@ -0,0 +1,219 @@
+#!/usr/bin/env zsh
+set -euo pipefail
+
+set +eu
+source ~/.zshrc
+set -eu
+
+SCRIPT_DIR="${0:A:h}"
+REPO_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
+VERSION="${1:-1.21.11-Vanilla}"
+RUN_ROOT="${TMPDIR:-/tmp}/mcc-integration-testing"
+RUN_ID="$(date +%Y%m%d-%H%M%S)"
+RUN_DIR="$RUN_ROOT/$RUN_ID"
+SERVER_LOG_FILE="$MCC_SERVERS/$VERSION/logs/latest.log"
+MCC_LOG="$RUN_DIR/mcc.log"
+BUILD_LOG="$RUN_DIR/build.log"
+SERVER_TMUX_LOG="$RUN_DIR/server-tmux.log"
+SERVER_FILE_LOG="$RUN_DIR/server-latest.log"
+INPUT_FILE="$REPO_ROOT/mcc_input.txt"
+MCC_PID=""
+
+mkdir -p "$RUN_DIR"
+
+cleanup() {
+    if [[ -n "${MCC_PID:-}" ]] && kill -0 "$MCC_PID" 2>/dev/null; then
+        mcc-cmd "quit" >/dev/null 2>&1 || true
+        sleep 2
+        kill "$MCC_PID" 2>/dev/null || true
+        wait "$MCC_PID" 2>/dev/null || true
+    fi
+
+    mc-stop "$VERSION" >/dev/null 2>&1 || true
+}
+trap cleanup EXIT
+
+wait_for_file_pattern() {
+    local file="$1"
+    local pattern="$2"
+    local description="$3"
+    local timeout="${4:-60}"
+    local elapsed=0
+
+    while (( elapsed < timeout )); do
+        if [[ -f "$file" ]] && grep -Fq "$pattern" "$file"; then
+            return 0
+        fi
+        sleep 1
+        ((elapsed += 1))
+    done
+
+    echo "Timed out waiting for: $description" >&2
+    return 1
+}
+
+wait_for_server_ready() {
+    local timeout="${1:-60}"
+    local elapsed=0
+
+    while (( elapsed < timeout )); do
+        if mc-log "$VERSION" 250 2>/dev/null | grep -Fq "Done ("; then
+            return 0
+        fi
+        sleep 1
+        ((elapsed += 1))
+    done
+
+    echo "Timed out waiting for server readiness" >&2
+    return 1
+}
+
+wait_for_server_log_pattern() {
+    local pattern="$1"
+    local description="$2"
+    local timeout="${3:-60}"
+    local elapsed=0
+
+    while (( elapsed < timeout )); do
+        if [[ -f "$SERVER_LOG_FILE" ]] && grep -Fq "$pattern" "$SERVER_LOG_FILE"; then
+            return 0
+        fi
+        sleep 1
+        ((elapsed += 1))
+    done
+
+    echo "Timed out waiting for server log: $description" >&2
+    return 1
+}
+
+capture_server_logs() {
+    mc-log "$VERSION" 400 > "$SERVER_TMUX_LOG" 2>/dev/null || true
+    if [[ -f "$SERVER_LOG_FILE" ]]; then
+        cp "$SERVER_LOG_FILE" "$SERVER_FILE_LOG"
+    fi
+}
+
+fail() {
+    capture_server_logs
+    echo "FAIL: $1" >&2
+    echo "Run directory: $RUN_DIR" >&2
+    exit 1
+}
+
+assert_contains() {
+    local file="$1"
+    local pattern="$2"
+    local description="$3"
+
+    grep -Fq "$pattern" "$file" || fail "$description"
+}
+
+assert_not_contains() {
+    local file="$1"
+    local pattern="$2"
+    local description="$3"
+
+    if grep -Fq "$pattern" "$file"; then
+        fail "$description"
+    fi
+}
+
+run_server_command() {
+    local cmd="$1"
+    echo "SERVER> $cmd"
+    mc-rcon "$cmd" >/dev/null || fail "Server command failed: $cmd"
+}
+
+run_mcc_command() {
+    local cmd="$1"
+    echo "MCC> $cmd"
+    mcc-cmd "$cmd"
+    sleep 2
+}
+
+"$SCRIPT_DIR/ensure_offline_server.sh" "$VERSION"
+
+: > "$INPUT_FILE"
+
+echo "Building MCC..."
+mcc-build > "$BUILD_LOG" 2>&1 || fail "mcc-build failed"
+
+echo "Starting server..."
+mc-start "$VERSION" >/dev/null
+wait_for_server_ready || fail "Server did not become ready"
+
+echo "Starting MCC..."
+mcc-run 25565 > "$MCC_LOG" 2>&1 &
+MCC_PID=$!
+
+wait_for_file_pattern "$MCC_LOG" "Server was successfully joined." "MCC join success" 90 || fail "MCC failed to join"
+wait_for_server_log_pattern "CursorBot joined the game" "server join entry" 30 || fail "Server never logged the join"
+
+run_server_command "op CursorBot"
+run_server_command "gamerule sendCommandFeedback true"
+run_server_command "gamerule logAdminCommands true"
+run_server_command "time set day"
+run_server_command "weather clear"
+sleep 2
+
+run_mcc_command "health"
+run_mcc_command "list"
+run_mcc_command "inventory player list"
+run_mcc_command "/gamemode creative"
+run_mcc_command "inventory creativegive 36 Diamond 16"
+run_mcc_command "inventory player list"
+run_mcc_command "entity"
+run_mcc_command "/time query daytime"
+run_mcc_command "smoke_test_from_mcc_full_spectrum"
+
+run_server_command "execute as CursorBot at @s run summon minecraft:cow ~2 ~ ~"
+run_server_command "execute as CursorBot at @s run summon minecraft:zombie ~4 ~ ~"
+run_server_command "execute as CursorBot at @s run summon minecraft:creeper ~6 ~ ~"
+run_server_command "execute as CursorBot at @s run summon minecraft:skeleton ~8 ~ ~"
+run_server_command "execute as CursorBot at @s run summon minecraft:villager ~-2 ~ ~"
+run_server_command "execute as CursorBot at @s run summon minecraft:allay ~-4 ~ ~"
+run_server_command "execute as CursorBot at @s run summon minecraft:armor_stand ~ ~ ~2"
+
+sleep 2
+run_mcc_command "entity"
+
+run_server_command "execute as CursorBot at @s run particle minecraft:happy_villager ~ ~1 ~ 0.5 0.5 0.5 0 12 force"
+run_server_command "execute as CursorBot at @s run particle minecraft:end_rod ~ ~1 ~ 0.5 0.5 0.5 0.01 20 force"
+run_server_command "execute as CursorBot at @s run particle minecraft:explosion ~ ~1 ~ 0 0 0 0 1 force"
+run_server_command "execute as CursorBot at @s run particle minecraft:totem_of_undying ~ ~1 ~ 0.5 0.5 0.5 0.1 20 force"
+
+run_server_command "execute as CursorBot at @s run playsound minecraft:entity.lightning_bolt.thunder master CursorBot ~ ~ ~ 1 1 0"
+run_server_command "execute as CursorBot at @s run playsound minecraft:block.note_block.bell master CursorBot ~ ~ ~ 1 1 0"
+
+run_server_command "execute as CursorBot at @s run summon minecraft:tnt ~3 ~ ~"
+sleep 2
+run_server_command "execute as CursorBot at @s run summon minecraft:tnt ~6 ~ ~"
+
+sleep 6
+capture_server_logs
+
+assert_contains "$MCC_LOG" "Server was successfully joined." "MCC never joined the server"
+assert_contains "$MCC_LOG" "[FileInput] > inventory player list" "Inventory command was not executed"
+assert_contains "$MCC_LOG" "[FileInput] > entity" "Entity command was not executed"
+assert_contains "$MCC_LOG" "[FileInput] > /gamemode creative" "Creative mode command was not executed from MCC"
+assert_contains "$MCC_LOG" "Requested Diamond x16 in slot #36" "Creative inventory give did not succeed"
+assert_contains "$MCC_LOG" "smoke_test_from_mcc_full_spectrum" "Client-originated chat was not observed"
+assert_not_contains "$MCC_LOG" "Please enable InventoryHandling" "Inventory handling is still disabled"
+assert_not_contains "$MCC_LOG" "Please enable EntityHandling" "Entity handling is still disabled"
+assert_not_contains "$MCC_LOG" "You must be in Creative gamemode" "Creative mode was not active when creativegive ran"
+assert_not_contains "$MCC_LOG" "Failed to load settings" "MCC failed to reload its config"
+
+assert_contains "$SERVER_FILE_LOG" "CursorBot joined the game" "Server never saw CursorBot join"
+assert_contains "$SERVER_FILE_LOG" "smoke_test_from_mcc_full_spectrum" "Server never received the client chat message"
+assert_contains "$SERVER_FILE_LOG" "Displaying particle minecraft:happy_villager" "Particle events were not recorded on the server"
+assert_contains "$SERVER_FILE_LOG" "Played sound minecraft:block.note_block.bell to CursorBot" "Sound events were not recorded on the server"
+assert_contains "$SERVER_FILE_LOG" "Summoned new Primed TNT" "TNT summon did not occur on the server"
+assert_not_contains "$SERVER_FILE_LOG" "Sending unknown packet 'clientbound/minecraft:disconnect'" "Server hit the disconnect packet regression during the test"
+
+cat <<EOF
+PASS
+Run directory: $RUN_DIR
+MCC log: $MCC_LOG
+Server log: $SERVER_FILE_LOG
+Build log: $BUILD_LOG
+EOF

.skills/mcc-integration-testing/scripts/summarize_test_run.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env zsh
+set -euo pipefail
+
+RUN_ROOT="${TMPDIR:-/tmp}/mcc-integration-testing"
+RUN_DIR="${1:-$(find "$RUN_ROOT" -mindepth 1 -maxdepth 1 -type d | sort | tail -n 1)}"
+
+if [[ -z "${RUN_DIR:-}" ]] || [[ ! -d "$RUN_DIR" ]]; then
+    echo "Run directory not found" >&2
+    exit 1
+fi
+
+MCC_LOG="$RUN_DIR/mcc.log"
+SERVER_LOG="$RUN_DIR/server-latest.log"
+BUILD_LOG="$RUN_DIR/build.log"
+
+echo "Run directory: $RUN_DIR"
+echo
+echo "Build result:"
+grep -E "Warning\(s\)|Error\(s\)|Time Elapsed" "$BUILD_LOG" || true
+echo
+echo "MCC highlights:"
+grep -E "Server was successfully joined|FileInput|smoke_test_from_mcc_full_spectrum|There are [0-9]+ of a max|health|Creative" "$MCC_LOG" || true
+echo
+echo "Server highlights:"
+grep -E "joined the game|Made CursorBot a server operator|game mode|smoke_test_from_mcc_full_spectrum|summon|particle|playsound|tnt" "$SERVER_LOG" || true

MinecraftClient/ChatBots/AntiAFK.cs

@@ -64,6 +64,12 @@ namespace MinecraftClient.ChatBots
             {
                 public double min, max;
 
+                public Range()
+                {
+                    min = 0;
+                    max = 0;
+                }
+
                 public Range(int value)
                 {
                     min = max = value;
@@ -180,4 +186,4 @@ namespace MinecraftClient.ChatBots
                 currentLocation.Z + random.Next(range * -1, range));
         }
     }
-}
+}

MinecraftClient/ChatBots/AutoCraft.cs

@@ -106,6 +106,13 @@ namespace MinecraftClient.ChatBots
             {
                 public double X, Y, Z;
 
+                public LocationConfig()
+                {
+                    X = 0;
+                    Y = 0;
+                    Z = 0;
+                }
+
                 public LocationConfig(double X, double Y, double Z)
                 {
                     this.X = X;

MinecraftClient/ChatBots/AutoDig.cs

@@ -85,6 +85,13 @@ namespace MinecraftClient.ChatBots
             {
                 public double x, y, z;
 
+                public Coordination()
+                {
+                    x = 0;
+                    y = 0;
+                    z = 0;
+                }
+
                 public Coordination(double x, double y, double z)
                 {
                     this.x = x; this.y = y; this.z = z;

MinecraftClient/ChatBots/AutoFishing.cs

@@ -103,6 +103,12 @@ namespace MinecraftClient.ChatBots
                 public Coordination? XYZ;
                 public Facing? facing;
 
+                public LocationConfig()
+                {
+                    XYZ = null;
+                    facing = null;
+                }
+
                 public LocationConfig(double yaw, double pitch)
                 {
                     this.XYZ = null;
@@ -125,6 +131,13 @@ namespace MinecraftClient.ChatBots
                 {
                     public double x, y, z;
 
+                    public Coordination()
+                    {
+                        x = 0;
+                        y = 0;
+                        z = 0;
+                    }
+
                     public Coordination(double x, double y, double z)
                     {
                         this.x = x; this.y = y; this.z = z;
@@ -135,6 +148,12 @@ namespace MinecraftClient.ChatBots
                 {
                     public double yaw, pitch;
 
+                    public Facing()
+                    {
+                        yaw = 0;
+                        pitch = 0;
+                    }
+
                     public Facing(double yaw, double pitch)
                     {
                         this.yaw = yaw; this.pitch = pitch;

MinecraftClient/ChatBots/AutoRelog.cs

@@ -57,6 +57,12 @@ namespace MinecraftClient.ChatBots
             {
                 public double min, max;
 
+                public Range()
+                {
+                    min = 0;
+                    max = 0;
+                }
+
                 public Range(int value)
                 {
                     min = max = value;

MinecraftClient/ChatBots/ScriptScheduler.cs

@@ -116,6 +116,12 @@ namespace MinecraftClient.ChatBots
                     public bool Enable = false;
                     public TimeSpan[] Times;
 
+                    public TriggerOnTimeConfig()
+                    {
+                        Enable = false;
+                        Times = Array.Empty<TimeSpan>();
+                    }
+
                     public TriggerOnTimeConfig(bool Enable, TimeSpan[] Time)
                     {
                         this.Enable = Enable;
@@ -134,6 +140,13 @@ namespace MinecraftClient.ChatBots
                     public bool Enable = false;
                     public double MinTime, MaxTime;
 
+                    public TriggerOnIntervalConfig()
+                    {
+                        Enable = false;
+                        MinTime = 0;
+                        MaxTime = 0;
+                    }
+
                     public TriggerOnIntervalConfig(double value)
                     {
                         this.Enable = true;

MinecraftClient/Settings.cs

@@ -658,6 +658,12 @@ namespace MinecraftClient
                 {
                     public string Login = string.Empty, Password = string.Empty;
 
+                    public AccountInfoConfig()
+                    {
+                        Login = string.Empty;
+                        Password = string.Empty;
+                    }
+
                     public AccountInfoConfig(string Login)
                     {
                         this.Login = Login;
@@ -676,6 +682,12 @@ namespace MinecraftClient
                     public string Host = string.Empty;
                     public ushort? Port = null;
 
+                    public ServerInfoConfig()
+                    {
+                        Host = string.Empty;
+                        Port = null;
+                    }
+
                     public ServerInfoConfig(string Host)
                     {
                         string[] sip = Host.Split(new[] { ":", "：" }, StringSplitOptions.None);
@@ -699,6 +711,12 @@ namespace MinecraftClient
                     public string Host = string.Empty;
                     public int Port = 443;
 
+                    public AuthlibServer()
+                    {
+                        Host = string.Empty;
+                        Port = 443;
+                    }
+
                     public AuthlibServer(string Host)
                     {
                         string[] sip = Host.Split(new[] { ":", "：" }, StringSplitOptions.None);