diff --git a/README.md b/README.md
index 97481ea..848fa2d 100644
--- a/README.md
+++ b/README.md
@@ -1,39 +1,52 @@
-# AutoRail — 自动铺铁轨（Fabric 1.21.4 + Baritone API）
+# AutoRail — 自动铺铁轨（Fabric 1.21.4，内置寻路）
 
-面向方向自动铺设铁轨的 Minecraft 客户端模组。不依赖 Baritone 寻路来规划轨道——
-它只借 Baritone 的行走能力做“点到点建造”，保证铁轨能铺过悬崖边等寻路会回避的地形。
+按住 **R+T** 打开菜单，输入**起始点**、**目标点**和必经的**途径点**，模组用内置 A* 寻路
+规划一条可铺轨的路线，然后控制玩家边走边铺，直到目标点。**不依赖 Baritone**，寻路与行走全部内置。
 
 ## 使用
 
-1. 安装 [Fabric Loader ≥0.16.9](https://fabricmc.net/use/) 与 [Fabric API](https://modrinth.com/mod/fabric-api)，以及 Baritone（1.13.1，兼容 1.21.4 的版本）。
-2. 把 `autorail-<version>.jar` 放进 `mods/`。
-3. 进游戏后按 **R** 开启/关闭。背包里要有**铁轨**（垫脚石需要时还要有**圆石**）。
-4. 按住/调整视角方向→玩家会边走边往正前方铺直轨；手动转 90° 即可转弯（只铺直轨）。
-5. 前方被阻挡、找不到地面、铁轨耗尽时自动停止并提示。
+1. 安装 [Fabric Loader ≥0.16.9](https://fabricmc.net/use/) 与 [Fabric API](https://modrinth.com/mod/fabric-api)，把 `autorail-<version>.jar` 放进 `mods/`。
+2. 进世界后按住 **R+T** 打开菜单（先按 T 弹出聊天栏也会被菜单替换掉，正常现象）。
+3. 起始点留空 = 当前坐标；目标点必填；途径点可添加多个（按顺序经过）。
+   坐标格式支持：`100 64 -200`（x y z）、`100 -200`（x z，自动找地面）、`~`、`~ 10 ~`、`~-5` 等相对写法。
+4. 点“开始铺轨”：先分片寻路（菜单/聊天栏显示进度，不卡游戏），完成后自动开始铺设（菜单自动关闭）。
+5. 快捷栏需要**铁轨**；遇到悬空/水面会自动用**圆石**垫脚，没有则提示并停止。
+6. 铺轨过程中不要打开聊天/背包等界面（行走会暂停）；再按 R+T 可查看进度或点“停止”。
 
-## 行为逻辑
+## 内置寻路（A*）
 
-- **取朝向**：读取玩家水平朝向（Yaw），计算正前方 2 格处的地面。
-- **放置**：切换热键栏到铁轨并同步 `UpdateSelectedSlotC2S`，随后通过
-  `ClientPlayerInteractionManager`（Baritone 的 `IPlayerController`）发送右键放置——
-  **全程合法交互，绝不 `world.setBlockState`**，多人服务器才会承认。
-- **移动**：放置后设 `GoalBlock` 让玩家走到目标点，循环往复。
-- **节奏**：每次动作间隔 5 tick（250ms），处于多人服务器建议的 200~300ms 区间。
-- **垫脚石**：目标列下方悬空/落差超过 2 格时，先拿圆石右键垫补，再接铺铁轨（可选逻辑，已实现）。
-- **铁轨朝向**：交给原版自动衔接（直轨）。转弯靠玩家手动转视角，开发量减半。
+- 专为铁轨设计：4 向移动、允许 ±1 格坡度、禁止掉头、禁止“转弯+坡度”同格（原版没有斜弯轨）。
+- 每个节点校验：上方两格可通行（玩家沿线行走）、下方有实心支撑或可用圆石垫补、避开水面/岩浆。
+- 转弯有额外代价（尽量走直线）；已有铁轨可复用且有折扣，优先延伸既有线路。
+- 分片执行（每 tick 限额展开 4096 节点）；搜索范围限制在检查点包围盒外扩 48 格，总展开上限 40 万节点。
+
+## 铺设（合法交互）
+
+- 切换快捷栏 + `processRightClickBlock` 右键放置，**全程合法交互，绝不 `world.setBlockState`**，多人服务器可信任。
+- 放置节奏 200ms 一次；放置前自动看向目标方块；上坡自动跳跃；卡住自动检测并停止报错。
+- 行走只用客户端输入（前进/跳跃键 + 平滑转向），路径按“已铺设节点”推进，不会踩空。
+
+## 代码结构
+
+```text
+com.autorail
+├─ AutoRailClient          # 入口：R+T 组合键 + 每 tick 驱动服务
+├─ gui/AutoRailScreen      # 菜单：起点/终点/途径点输入与状态显示
+├─ service/AutoRailService # 状态机：PLANNING → LAYING → DONE/FAILED
+├─ service/RailExecutor    # 执行器：行走控制 + 合法放置铁轨/圆石
+└─ pathing/                # 内置寻路：RailPathfinder(A*)、RailStep、CoordParser
+```
 
 ## 开发
 
 ```bash
-gradlew build          # 产物在 build/libs/autorall-<version>.jar
+gradlew build          # 产物在 build/libs/autorail-<version>.jar
 ```
 
-- `src/main/java/com/autorall/AutoRailClient.java` — 入口：按键绑定、进程注册
-- `src/main/java/com/autorall/process/RailProcess.java` — 铺轨主逻辑（`IBaritoneProcess`）
-- Baritone API 依赖：`libs/baritone-api-fabric-1.13.1.jar`（本地 `modImplementation`，Loom 自动重映射）
-
 ## 已知限制
 
-- 只铺普通铁轨（`minecraft:rail`），不支持动力铁轨/探测铁轨。
-- 只铺直轨；曲线由原版在相邻铁轨存在时自动形成，手动转弯请让两段直线夹角足够清晰。
-- `isSolidBlock` 等判定基于客户端世界状态；服务器延误时可能出现个别放置失败，会自动重试。
\ No newline at end of file
+- 只铺普通铁轨（`minecraft:rail`），不铺动力铁轨/探测铁轨。
+- 不破坏、不放置除铁轨/圆石外的方块：遇到障碍会绕路而不是挖穿。
+- 起始点必须在玩家附近（水平 6 格、垂直 8 格以内）——本模组不含到远处的自由行走导航。
+- 遇水会垫圆石架桥，但岩浆列直接视为不可通行。
+- 基于客户端世界状态判定；服务器延迟时个别放置会失败，会自动重试。
diff --git a/build.gradle b/build.gradle
index 5953d80..3e220f9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,8 +19,6 @@ dependencies {
     mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
     modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
     modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
-
-    modImplementation files("libs/baritone-api-fabric-${project.baritone_version}.jar")
 }
 
 processResources {
diff --git a/gradle.properties b/gradle.properties
index b8785b4..52321f7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -12,5 +12,3 @@ fabric_version=0.112.0+1.21.4
 mod_version=1.0.0
 maven_group=com.autorail
 archives_base_name=autorail
-
-baritone_version=1.13.1
diff --git a/libs/baritone-api-fabric-1.13.1.jar b/libs/baritone-api-fabric-1.13.1.jar
deleted file mode 100644
index 27d7eca..0000000
Binary files a/libs/baritone-api-fabric-1.13.1.jar and /dev/null differ
diff --git a/src/main/java/com/autorail/AutoRailClient.java b/src/main/java/com/autorail/AutoRailClient.java
index 1ea02dd..3b63e0f 100644
--- a/src/main/java/com/autorail/AutoRailClient.java
+++ b/src/main/java/com/autorail/AutoRailClient.java
@@ -1,82 +1,46 @@
 package com.autorail;
 
-import baritone.api.BaritoneAPI;
-import com.autorail.process.RailProcess;
+import com.autorail.gui.AutoRailScreen;
+import com.autorail.service.AutoRailService;
 import net.fabricmc.api.ClientModInitializer;
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
-import net.fabricmc.fabric.api.client.keybinding.v1.KeyBindingHelper;
-import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.option.KeyBinding;
+import net.minecraft.client.gui.screen.ChatScreen;
 import net.minecraft.client.util.InputUtil;
-import net.minecraft.text.Text;
 import org.lwjgl.glfw.GLFW;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+/**
+ * 入口：按住 R+T 打开铺轨菜单；每 tick 驱动调度服务（寻路 / 铺设）。
+ */
 public class AutoRailClient implements ClientModInitializer {
 
     public static final Logger LOGGER = LoggerFactory.getLogger("autorail");
-    public static final RailProcess RAIL_PROCESS = new RailProcess();
+    public static final AutoRailService SERVICE = new AutoRailService();
 
-    private static KeyBinding toggleKey;
-    private static boolean registered = false;
+    private boolean comboHeld;
 
     @Override
     public void onInitializeClient() {
-        toggleKey = KeyBindingHelper.registerKeyBinding(new KeyBinding(
-                "key.autorail.toggle",
-                InputUtil.Type.KEYSYM,
-                GLFW.GLFW_KEY_R,
-                "category.autorail"
-        ));
-
-        ClientTickEvents.END_CLIENT_TICK.register(AutoRailClient::onClientTick);
+        ClientTickEvents.END_CLIENT_TICK.register(this::onClientTick);
     }
 
-    private static void onClientTick(MinecraftClient client) {
-        registerIfNeeded(client);
+    private void onClientTick(MinecraftClient client) {
+        SERVICE.tick(client);
 
-        while (toggleKey.wasPressed()) {
-            if (client.player == null || client.world == null) {
-                sendMessage(client, "请先进入世界再使用");
-                continue;
-            }
-            if (!registered) {
-                sendMessage(client, "未检测到 Baritone，无法启用");
-                continue;
-            }
-            if (RAIL_PROCESS.isActive()) {
-                RAIL_PROCESS.stop();
-                sendMessage(client, "自动铺轨已停止");
-            } else {
-                RAIL_PROCESS.start();
-                sendMessage(client, "自动铺轨已启动（R 停止，只铺直轨，转弯请手动转向）");
-            }
-        }
-    }
-
-    /**
-     * 进程只需注册一次（Baritone 在同一个游戏会话内跨世界保持存在）。
-     */
-    private static void registerIfNeeded(MinecraftClient client) {
-        if (registered || client.world == null || !FabricLoader.getInstance().isModLoaded("baritone")) {
+        if (client.player == null || client.world == null || client.getWindow() == null) {
+            comboHeld = false;
             return;
         }
-        try {
-            BaritoneAPI.getProvider().getPrimaryBaritone()
-                    .getPathingControlManager()
-                    .registerProcess(RAIL_PROCESS);
-            registered = true;
-            LOGGER.info("AutoRail process registered");
-        } catch (Throwable t) {
-            LOGGER.error("Failed to register AutoRail process", t);
+        long window = client.getWindow().getHandle();
+        boolean combo = InputUtil.isKeyPressed(window, GLFW.GLFW_KEY_R)
+                && InputUtil.isKeyPressed(window, GLFW.GLFW_KEY_T);
+        boolean edge = combo && !comboHeld;
+        comboHeld = combo;
+        // 允许覆盖聊天界面：先按 T 会弹出聊天栏，R+T 组合时直接换成菜单
+        if (edge && (client.currentScreen == null || client.currentScreen instanceof ChatScreen)) {
+            client.setScreen(new AutoRailScreen());
         }
     }
-
-    private static void sendMessage(MinecraftClient client, String message) {
-        if (client.player != null) {
-            client.player.sendMessage(Text.literal("[AutoRail] " + message), false);
-        }
-    }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/com/autorail/gui/AutoRailScreen.java b/src/main/java/com/autorail/gui/AutoRailScreen.java
new file mode 100644
index 0000000..1be37a3
--- /dev/null
+++ b/src/main/java/com/autorail/gui/AutoRailScreen.java
@@ -0,0 +1,226 @@
+package com.autorail.gui;
+
+import com.autorail.AutoRailClient;
+import com.autorail.pathing.CoordParser;
+import com.autorail.service.AutoRailService;
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.gui.widget.ButtonWidget;
+import net.minecraft.client.gui.widget.TextFieldWidget;
+import net.minecraft.text.Text;
+import net.minecraft.util.math.BlockPos;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 自动铺轨菜单：输入起始点、目标点与若干必经途径点，
+ * 点击“开始铺轨”后由 {@link AutoRailService} 先寻路再自动铺设。
+ */
+public class AutoRailScreen extends Screen {
+
+    private static final int MAX_WAYPOINTS = 8;
+    private static final int FIELD_W = 220;
+    private static final int FIELD_H = 18;
+    private static final int ROW_STEP = 22;
+
+    private TextFieldWidget startField;
+    private TextFieldWidget destField;
+    private final List<TextFieldWidget> waypointFields = new ArrayList<>();
+    private ButtonWidget beginBtn;
+    private ButtonWidget stopBtn;
+    private ButtonWidget addBtn;
+
+    private String startText = "";
+    private String destText = "";
+    private final List<String> waypointTexts = new ArrayList<>();
+    private Text error;
+    private AutoRailService.State prevState;
+    private int maxVisible;
+
+    // 布局锚点（init 时计算，render 用来画标签）
+    private int startY, destY, wpLabelY, rowsY, addY, btnY, statusY, hintY;
+
+    public AutoRailScreen() {
+        super(Text.translatable("autorail.gui.title"));
+        prevState = AutoRailClient.SERVICE.getState();
+    }
+
+    @Override
+    protected void init() {
+        waypointFields.clear();
+        int cx = this.width / 2;
+        int left = cx - FIELD_W / 2;
+
+        startY = 44;
+        startField = addDrawableChild(makeField(left, startY, "autorail.gui.start", "autorail.gui.start.ph"));
+        startField.setText(startText);
+
+        destY = startY + ROW_STEP + 6;
+        destField = addDrawableChild(makeField(left, destY, "autorail.gui.dest", "autorail.gui.dest.ph"));
+        destField.setText(destText);
+
+        wpLabelY = destY + ROW_STEP + 6;
+        rowsY = wpLabelY + 12;
+        maxVisible = Math.max(1, Math.min(MAX_WAYPOINTS, (this.height - rowsY - 130) / ROW_STEP));
+
+        int ry = rowsY;
+        List<String> texts = new ArrayList<>(
+                waypointTexts.size() > maxVisible ? waypointTexts.subList(0, maxVisible) : waypointTexts);
+        for (String t : texts) {
+            TextFieldWidget f = addDrawableChild(makeField(left, ry, "autorail.gui.waypoints", "autorail.gui.wp.ph"));
+            f.setText(t);
+            waypointFields.add(f);
+            int idx = waypointFields.size() - 1;
+            addDrawableChild(ButtonWidget.builder(Text.translatable("autorail.gui.remove"), b -> {
+                saveTexts();
+                if (idx < waypointTexts.size()) {
+                    waypointTexts.remove(idx);
+                }
+                clearAndInit();
+            }).dimensions(left + FIELD_W - 20, ry, 20, FIELD_H).build());
+            ry += ROW_STEP;
+        }
+
+        addY = ry + 2;
+        addBtn = addDrawableChild(ButtonWidget.builder(Text.translatable("autorail.gui.add"), b -> {
+            saveTexts();
+            waypointTexts.add("");
+            clearAndInit();
+        }).dimensions(left, addY, 130, FIELD_H).build());
+
+        btnY = this.height - 52;
+        beginBtn = addDrawableChild(ButtonWidget.builder(Text.translatable("autorail.gui.begin"), b -> onBegin())
+                .dimensions(cx - 141, btnY, 90, 20).build());
+        stopBtn = addDrawableChild(ButtonWidget.builder(Text.translatable("autorail.gui.stop"), b -> {
+            AutoRailClient.SERVICE.stop(this.client == null ? null : this.client.player);
+        }).dimensions(cx - 45, btnY, 90, 20).build());
+        addDrawableChild(ButtonWidget.builder(Text.translatable("autorail.gui.close"), b -> close())
+                .dimensions(cx + 51, btnY, 90, 20).build());
+
+        statusY = this.height - 30;
+        hintY = this.height - 18;
+    }
+
+    private TextFieldWidget makeField(int x, int y, String labelKey, String placeholderKey) {
+        TextFieldWidget f = new TextFieldWidget(this.textRenderer, x, y, FIELD_W, FIELD_H,
+                Text.translatable(labelKey));
+        f.setMaxLength(48);
+        f.setPlaceholder(Text.translatable(placeholderKey));
+        return f;
+    }
+
+    @Override
+    public void tick() {
+        saveTexts();
+        AutoRailService s = AutoRailClient.SERVICE;
+        AutoRailService.State st = s.getState();
+        beginBtn.active = st == AutoRailService.State.IDLE
+                || st == AutoRailService.State.FAILED
+                || st == AutoRailService.State.DONE;
+        stopBtn.active = st == AutoRailService.State.PLANNING || st == AutoRailService.State.LAYING;
+        addBtn.active = waypointTexts.size() < Math.min(MAX_WAYPOINTS, Math.max(1, maxVisible));
+        // 寻路完成进入铺设时自动关闭界面（行走需要关闭界面）
+        if (prevState == AutoRailService.State.PLANNING && st == AutoRailService.State.LAYING) {
+            this.client.setScreen(null);
+            return;
+        }
+        prevState = st;
+    }
+
+    private void onBegin() {
+        saveTexts();
+        error = null;
+        if (this.client == null || this.client.player == null || this.client.world == null) {
+            error = Text.translatable("autorail.err.needWorld");
+            return;
+        }
+        var player = this.client.player;
+        var world = this.client.world;
+        try {
+            BlockPos start = CoordParser.parse(startText.isBlank() ? "~" : startText, player, world);
+            double dx = start.getX() - player.getBlockX();
+            double dz = start.getZ() - player.getBlockZ();
+            if (dx * dx + dz * dz > 36 || Math.abs(start.getY() - player.getBlockY()) > 8) {
+                error = Text.translatable("autorail.err.startFar");
+                return;
+            }
+            BlockPos dest = CoordParser.parse(destText, player, world);
+            List<BlockPos> cps = new ArrayList<>();
+            cps.add(start);
+            for (String t : waypointTexts) {
+                if (!t.isBlank()) {
+                    cps.add(CoordParser.parse(t, player, world));
+                }
+            }
+            cps.add(dest);
+            List<BlockPos> dedup = new ArrayList<>();
+            for (BlockPos c : cps) {
+                if (dedup.isEmpty() || !dedup.get(dedup.size() - 1).equals(c)) {
+                    dedup.add(c);
+                }
+            }
+            if (dedup.size() < 2) {
+                error = Text.translatable("autorail.err.startEqDest");
+                return;
+            }
+            AutoRailClient.SERVICE.begin(world, player, dedup);
+            prevState = AutoRailClient.SERVICE.getState();
+        } catch (IllegalArgumentException e) {
+            error = Text.translatable(e.getMessage() == null ? "autorail.err.coordFormat" : e.getMessage());
+        }
+    }
+
+    private void saveTexts() {
+        if (startField != null) {
+            startText = startField.getText();
+        }
+        if (destField != null) {
+            destText = destField.getText();
+        }
+        // 只用可见字段更新对应前若干项；保留因窗口变小而未显示的尾部条目，避免丢失途径点
+        int visible = waypointFields.size();
+        List<String> tail = waypointTexts.size() > visible
+                ? new ArrayList<>(waypointTexts.subList(visible, waypointTexts.size()))
+                : List.of();
+        waypointTexts.clear();
+        for (TextFieldWidget f : waypointFields) {
+            waypointTexts.add(f.getText());
+        }
+        waypointTexts.addAll(tail);
+    }
+
+    @Override
+    public void removed() {
+        saveTexts();
+    }
+
+    @Override
+    public void render(DrawContext context, int mouseX, int mouseY, float delta) {
+        super.render(context, mouseX, mouseY, delta);
+        int cx = this.width / 2;
+        int left = cx - FIELD_W / 2;
+        context.drawCenteredTextWithShadow(this.textRenderer, this.title, cx, 16, 0xFFFFFF);
+        context.drawCenteredTextWithShadow(this.textRenderer,
+                Text.translatable("autorail.gui.hint"), cx, 28, 0xA0A0A0);
+        int labelColor = 0xE0E0E0;
+        context.drawTextWithShadow(this.textRenderer,
+                Text.translatable("autorail.gui.start"), left, startY - 11, labelColor);
+        context.drawTextWithShadow(this.textRenderer,
+                Text.translatable("autorail.gui.dest"), left, destY - 11, labelColor);
+        context.drawTextWithShadow(this.textRenderer,
+                Text.translatable("autorail.gui.waypoints"), left, wpLabelY, labelColor);
+        Text st = error != null ? error : AutoRailClient.SERVICE.statusText();
+        context.drawCenteredTextWithShadow(this.textRenderer, st, cx, statusY,
+                error != null ? 0xFF5555 : 0x55FF55);
+        if (AutoRailClient.SERVICE.getState() == AutoRailService.State.LAYING) {
+            context.drawCenteredTextWithShadow(this.textRenderer,
+                    Text.translatable("autorail.gui.hint.laying"), cx, hintY, 0xFFAA00);
+        }
+    }
+
+    @Override
+    public boolean shouldPause() {
+        return false;
+    }
+}
diff --git a/src/main/java/com/autorail/pathing/CoordParser.java b/src/main/java/com/autorail/pathing/CoordParser.java
new file mode 100644
index 0000000..9f0a38e
--- /dev/null
+++ b/src/main/java/com/autorail/pathing/CoordParser.java
@@ -0,0 +1,93 @@
+package com.autorail.pathing;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.client.network.ClientPlayerEntity;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.util.math.BlockPos;
+
+/**
+ * 坐标解析：支持 "x y z"、"x z"（自动找地面）、"~" 与 "~±n" 相对玩家。
+ * 解析失败抛 {@link IllegalArgumentException}，消息为语言 key。
+ */
+public final class CoordParser {
+
+    private CoordParser() {
+    }
+
+    public static BlockPos parse(String raw, ClientPlayerEntity player, ClientWorld world) {
+        if (raw == null || raw.isBlank()) {
+            throw err("autorail.err.emptyCoord");
+        }
+        String[] parts = raw.trim().split("[,;\\s]+");
+        if (parts.length != 2 && parts.length != 3) {
+            throw err("autorail.err.coordFormat");
+        }
+        // 两段式：x z（y 自动）；三段式：x y z
+        int[] v = new int[parts.length];
+        for (int i = 0; i < parts.length; i++) {
+            int axis = parts.length == 3 ? i : (i == 0 ? 0 : 2);
+            v[i] = part(parts[i], player, axis);
+        }
+        if (parts.length == 3) {
+            return new BlockPos(v[0], v[1], v[2]);
+        }
+        int y = findSurfaceY(world, v[0], v[1]);
+        if (y == Integer.MIN_VALUE) {
+            throw err("autorail.err.noGround");
+        }
+        return new BlockPos(v[0], y, v[1]);
+    }
+
+    private static IllegalArgumentException err(String key) {
+        return new IllegalArgumentException(key);
+    }
+
+    /** 解析单个分量：纯数字，或 ~/~n/~+n/~-n 相对玩家坐标。 */
+    private static int part(String s, ClientPlayerEntity player, int axis) {
+        int base = switch (axis) {
+            case 0 -> player.getBlockX();
+            case 1 -> player.getBlockY();
+            default -> player.getBlockZ();
+        };
+        if (s.equals("~")) {
+            return base;
+        }
+        if (s.startsWith("~")) {
+            try {
+                return base + Integer.parseInt(s.substring(1));
+            } catch (NumberFormatException e) {
+                throw err("autorail.err.coordFormat");
+            }
+        }
+        try {
+            return Integer.parseInt(s);
+        } catch (NumberFormatException e) {
+            throw err("autorail.err.coordFormat");
+        }
+    }
+
+    /**
+     * 从上往下找该列第一个“上方两格可通行”的实心地面，
+     * 返回铁轨可放置的 Y（地面 + 1）。找不到返回 Integer.MIN_VALUE。
+     */
+    public static int findSurfaceY(ClientWorld world, int x, int z) {
+        for (int y = world.getTopYInclusive() - 2; y > world.getBottomY() + 1; y--) {
+            BlockPos ground = new BlockPos(x, y, z);
+            BlockState g = world.getBlockState(ground);
+            if (g.isAir() || g.isReplaceable() || !g.getFluidState().isEmpty()
+                    || !g.isSolidBlock(world, ground)) {
+                continue;
+            }
+            if (passable(world, ground.up()) && passable(world, ground.up(2))) {
+                return y + 1;
+            }
+        }
+        return Integer.MIN_VALUE;
+    }
+
+    /** 可通行（放置/行走高度）：空气或无流体的可替换方块（如矮草）。 */
+    public static boolean passable(ClientWorld world, BlockPos pos) {
+        BlockState s = world.getBlockState(pos);
+        return s.isAir() || (s.getFluidState().isEmpty() && s.isReplaceable());
+    }
+}
diff --git a/src/main/java/com/autorail/pathing/RailPathfinder.java b/src/main/java/com/autorail/pathing/RailPathfinder.java
new file mode 100644
index 0000000..94f1fd4
--- /dev/null
+++ b/src/main/java/com/autorail/pathing/RailPathfinder.java
@@ -0,0 +1,294 @@
+package com.autorail.pathing;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.registry.tag.FluidTags;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.PriorityQueue;
+
+/**
+ * 内置 A* 铁轨寻路（不依赖任何外部寻路模组）。
+ *
+ * 节点 = 铁轨位置 + 进入方向。搜索规则与原版铁轨形状一致：
+ *  - 仅 4 向水平移动，禁止 180° 掉头；
+ *  - 相邻节点允许 ±1 格坡度，但“转弯 + 坡度”不能发生在同一格（原版没有斜弯轨）；
+ *  - 每个节点校验：铁轨位为空气/可替换/已有铁轨，上方两格可通行（玩家要沿线走），
+ *    下方有实心支撑（或空气/水——可用圆石垫补，岩浆直接视为不可通行）；
+ *  - 转弯有额外代价，倾向走直线；已有铁轨可复用且有折扣，优先延伸既有线路。
+ *
+ * 通过 {@link #step(int)} 分片执行（每帧限额展开），不会卡住客户端线程。
+ * 多个检查点（途径点）会被拆成多段依次寻路并拼接。
+ */
+public class RailPathfinder {
+
+    public enum State { RUNNING, FOUND, FAILED }
+
+    private static final float COST_TURN = 0.6f;
+    private static final float COST_UP = 1.0f;
+    private static final float COST_DOWN = 0.5f;
+    private static final float COST_SUPPORT = 2.0f;
+    private static final float DISCOUNT_RAIL = 0.5f;
+    /** 搜索区域在检查点包围盒基础上的外扩余量（格）。 */
+    private static final int MARGIN = 48;
+    private static final long MAX_EXPANSIONS = 400_000L;
+
+    private final ClientWorld world;
+    private final ArrayDeque<BlockPos> pending = new ArrayDeque<>();
+    private final List<RailStep> result = new ArrayList<>();
+
+    private State state = State.RUNNING;
+    private String failKey;
+
+    private BlockPos segStart;
+    private BlockPos segGoal;
+    private final PriorityQueue<Node> open = new PriorityQueue<>(Comparator.comparingDouble(n -> n.f));
+    private final Map<NodeKey, Node> best = new HashMap<>();
+    private long expansions;
+    private int opened;
+
+    public RailPathfinder(ClientWorld world, List<BlockPos> checkpoints) {
+        if (checkpoints == null || checkpoints.size() < 2) {
+            throw new IllegalArgumentException("autorail.err.startEqDest");
+        }
+        this.world = world;
+        this.segStart = checkpoints.get(0);
+        for (int i = 1; i < checkpoints.size(); i++) {
+            this.pending.add(checkpoints.get(i));
+        }
+        advanceSegment();
+    }
+
+    public State getState() {
+        return state;
+    }
+
+    public String getFailKey() {
+        return failKey;
+    }
+
+    public List<RailStep> getResult() {
+        return result;
+    }
+
+    public int getOpened() {
+        return opened;
+    }
+
+    /** 每帧调用一次，最多展开 budget 个节点。 */
+    public void step(int budget) {
+        if (state != State.RUNNING) {
+            return;
+        }
+        for (int b = 0; b < budget; b++) {
+            Node cur = poll();
+            if (cur == null) {
+                fail("autorail.err.pathNotFound");
+                return;
+            }
+            if (cur.pos.equals(segGoal)) {
+                appendSegment(cur);
+                segStart = segGoal;
+                advanceSegment();
+                if (state != State.RUNNING) {
+                    return;
+                }
+                continue;
+            }
+            expand(cur);
+            if (++expansions > MAX_EXPANSIONS) {
+                fail("autorail.err.tooFar");
+                return;
+            }
+        }
+    }
+
+    /** 取出优先队列中第一个未过期（仍为该 key 最优）的节点。 */
+    private Node poll() {
+        while (true) {
+            Node n = open.poll();
+            if (n == null) {
+                return null;
+            }
+            if (best.get(n.key) == n) {
+                return n;
+            }
+        }
+    }
+
+    private void expand(Node cur) {
+        Direction in = cur.dir == NULL_DIR ? null : Direction.byId(cur.dir);
+        for (Direction d : Direction.Type.HORIZONTAL) {
+            if (in != null && d == in.getOpposite()) {
+                continue; // 禁止掉头
+            }
+            boolean turn = in != null && d != in;
+            int[] dys = turn ? new int[]{0} : new int[]{0, 1, -1};
+            for (int dy : dys) {
+                BlockPos next = cur.pos.offset(d).up(dy);
+                if (!inRegion(next)) {
+                    continue;
+                }
+                int sup = checkNode(next);
+                if (sup < 0) {
+                    continue;
+                }
+                float cost = 1.0f;
+                if (dy == 1) {
+                    cost += COST_UP;
+                } else if (dy == -1) {
+                    cost += COST_DOWN;
+                }
+                if (sup == SUPPORT_BRIDGE) {
+                    cost += COST_SUPPORT;
+                } else if (sup == SUPPORT_RAIL) {
+                    cost -= DISCOUNT_RAIL;
+                }
+                if (turn) {
+                    cost += COST_TURN;
+                }
+                float g = cur.g + cost;
+                NodeKey key = new NodeKey(next.asLong(), (byte) d.getId());
+                Node old = best.get(key);
+                if (old == null || g < old.g - 1.0e-4f) {
+                    Node n = new Node(key, next, (byte) d.getId(), cur, g, g + h(next));
+                    best.put(key, n);
+                    open.add(n);
+                    opened++;
+                }
+            }
+        }
+    }
+
+    private static final byte NULL_DIR = -1;
+    private static final int SUPPORT_GROUND = 0;
+    private static final int SUPPORT_BRIDGE = 1;
+    private static final int SUPPORT_RAIL = 2;
+
+    /**
+     * 校验某位置能否作为铁轨节点。
+     *
+     * @return -1 不可用；0 天然支撑；1 需垫圆石；2 已有铁轨可复用
+     */
+    public int checkNode(BlockPos rail) {
+        BlockState rs = world.getBlockState(rail);
+        if (rs.isOf(Blocks.RAIL)) {
+            return CoordParser.passable(world, rail.up()) && CoordParser.passable(world, rail.up(2))
+                    ? SUPPORT_RAIL : -1;
+        }
+        if (!(rs.isAir() || (rs.getFluidState().isEmpty() && rs.isReplaceable()))) {
+            return -1;
+        }
+        if (!CoordParser.passable(world, rail.up()) || !CoordParser.passable(world, rail.up(2))) {
+            return -1;
+        }
+        BlockState sup = world.getBlockState(rail.down());
+        if (sup.getFluidState().isIn(FluidTags.LAVA)) {
+            return -1;
+        }
+        if (sup.getFluidState().isIn(FluidTags.WATER) || sup.isAir()) {
+            return SUPPORT_BRIDGE;
+        }
+        if (sup.isReplaceable()) {
+            return -1;
+        }
+        return sup.isSolidBlock(world, rail.down()) ? SUPPORT_GROUND : -1;
+    }
+
+    private void appendSegment(Node goal) {
+        ArrayDeque<RailStep> stack = new ArrayDeque<>();
+        for (Node n = goal; n != null; n = n.parent) {
+            Direction d = n.dir == NULL_DIR ? null : Direction.byId(n.dir);
+            stack.push(new RailStep(n.pos, d));
+        }
+        // 后续段的首节点与上一段终点重复，跳过一个
+        int skip = result.isEmpty() ? 0 : 1;
+        int i = 0;
+        while (!stack.isEmpty()) {
+            RailStep s = stack.pollFirst();
+            if (i++ >= skip) {
+                result.add(s);
+            }
+        }
+    }
+
+    private void advanceSegment() {
+        while (!pending.isEmpty() && pending.peekFirst().equals(segStart)) {
+            pending.pollFirst();
+        }
+        if (pending.isEmpty()) {
+            state = State.FOUND;
+            return;
+        }
+        segGoal = pending.pollFirst();
+        open.clear();
+        best.clear();
+        computeRegion();
+        if (checkNode(segStart) < 0) {
+            fail("autorail.err.startInvalid");
+            return;
+        }
+        Node start = new Node(new NodeKey(segStart.asLong(), NULL_DIR), segStart, NULL_DIR, null, 0f, h(segStart));
+        best.put(start.key, start);
+        open.add(start);
+        opened++;
+    }
+
+    private int minX, minY, minZ, maxX, maxY, maxZ;
+
+    private void computeRegion() {
+        minX = Math.min(segStart.getX(), segGoal.getX()) - MARGIN;
+        maxX = Math.max(segStart.getX(), segGoal.getX()) + MARGIN;
+        minZ = Math.min(segStart.getZ(), segGoal.getZ()) - MARGIN;
+        maxZ = Math.max(segStart.getZ(), segGoal.getZ()) + MARGIN;
+        minY = Math.max(world.getBottomY() + 1, Math.min(segStart.getY(), segGoal.getY()) - MARGIN);
+        maxY = Math.min(world.getTopYInclusive() - 3, Math.max(segStart.getY(), segGoal.getY()) + MARGIN);
+    }
+
+    private boolean inRegion(BlockPos p) {
+        return p.getX() >= minX && p.getX() <= maxX
+                && p.getY() >= minY && p.getY() <= maxY
+                && p.getZ() >= minZ && p.getZ() <= maxZ;
+    }
+
+    /** 曼哈顿距离 × 0.5，保证在有铁轨复用折扣时仍不高估。 */
+    private float h(BlockPos p) {
+        return 0.5f * (Math.abs(p.getX() - segGoal.getX())
+                + Math.abs(p.getY() - segGoal.getY())
+                + Math.abs(p.getZ() - segGoal.getZ()));
+    }
+
+    private void fail(String key) {
+        failKey = key;
+        state = State.FAILED;
+    }
+
+    private static final class Node {
+        final NodeKey key;
+        final BlockPos pos;
+        final byte dir;
+        final Node parent;
+        final float g;
+        final float f;
+
+        Node(NodeKey key, BlockPos pos, byte dir, Node parent, float g, float f) {
+            this.key = key;
+            this.pos = pos;
+            this.dir = dir;
+            this.parent = parent;
+            this.g = g;
+            this.f = f;
+        }
+    }
+
+    private record NodeKey(long pos, byte dir) {
+    }
+}
diff --git a/src/main/java/com/autorail/pathing/RailStep.java b/src/main/java/com/autorail/pathing/RailStep.java
new file mode 100644
index 0000000..d939eba
--- /dev/null
+++ b/src/main/java/com/autorail/pathing/RailStep.java
@@ -0,0 +1,13 @@
+package com.autorail.pathing;
+
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+
+/**
+ * 规划路径上的一个铁轨节点。
+ *
+ * @param railPos 铁轨应放置的位置（其下方一格为支撑方块）
+ * @param dir     进入该节点的行进方向（整条路径的首节点为 null）
+ */
+public record RailStep(BlockPos railPos, Direction dir) {
+}
diff --git a/src/main/java/com/autorail/process/RailProcess.java b/src/main/java/com/autorail/process/RailProcess.java
deleted file mode 100644
index 4326095..0000000
--- a/src/main/java/com/autorail/process/RailProcess.java
+++ /dev/null
@@ -1,330 +0,0 @@
-package com.autorail.process;
-
-import baritone.api.BaritoneAPI;
-import baritone.api.IBaritone;
-import baritone.api.pathing.goals.GoalBlock;
-import baritone.api.process.IBaritoneProcess;
-import baritone.api.process.PathingCommand;
-import baritone.api.process.PathingCommandType;
-import baritone.api.utils.IPlayerContext;
-import net.minecraft.block.BlockState;
-import net.minecraft.block.Blocks;
-import net.minecraft.client.network.ClientPlayerEntity;
-import net.minecraft.entity.player.PlayerInventory;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.item.Items;
-import net.minecraft.network.packet.c2s.play.UpdateSelectedSlotC2SPacket;
-import net.minecraft.text.Text;
-import net.minecraft.util.Hand;
-import net.minecraft.util.hit.BlockHitResult;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.Direction;
-import net.minecraft.util.math.MathHelper;
-import net.minecraft.util.math.Vec3d;
-import net.minecraft.world.World;
-
-/**
- * 点到点自动铺轨进程（不依赖 Baritone 寻路来规划轨道，只借它的行走能力）。
- *
- * 每一轮循环：
- *  1. 取玩家水平朝向 Yaw，算出前方 2 格处的地面（下方扫描实心方块）；
- *  2. 若该列下方悬空/过深，先用圆石垫脚（搭桥）；
- *  3. 否则切换热键栏到铁轨，右键地面放置（完全走合法交互，服务端才会承认）；
- *  4. 设 GoalBlock 让玩家走到目标点，然后重复。
- *
- * 只铺直轨：铁轨朝向交给原版自动衔接逻辑，转弯请玩家手动转视角。
- */
-public class RailProcess implements IBaritoneProcess {
-
-    /** 动作间隔（tick）。5 tick = 250ms，处于多人服务器建议的 200~300ms 区间，过快会被踢/回弹。 */
-    private static final int ACTION_INTERVAL_TICKS = 5;
-    /** 超过该 tick 数仍未走到目标时，视为已推进，继续铺下一段（避免永久卡死）。 */
-    private static final long FORCE_PROGRESS_TICKS = 20;
-    /** 目标点与玩家的水平距离（格），规范要求 1.5~2 格。 */
-    private static final double TARGET_DISTANCE = 2.0;
-    /** 允许的自然落差（格）。落差超过该值视为悬空，需要垫脚石。 */
-    private static final int MAX_DROP = 2;
-    /** calcFailed 后的宽限 tick：寻路暂时失败不立即停，超过才判定前方不可通行。 */
-    private static final long CALC_FAILED_GRACE_TICKS = 10;
-
-    private boolean active;
-    private long lastActionTick = Long.MIN_VALUE;
-    private GoalBlock currentGoal;
-    private long goalSetTick;
-
-    @Override
-    public boolean isActive() {
-        return active;
-    }
-
-    @Override
-    public boolean isTemporary() {
-        return false;
-    }
-
-    @Override
-    public void onLostControl() {
-    }
-
-    @Override
-    public String displayName0() {
-        return "AutoRail";
-    }
-
-    public void start() {
-        active = true;
-        currentGoal = null;
-    }
-
-    public void stop() {
-        active = false;
-        currentGoal = null;
-    }
-
-    @Override
-    public PathingCommand onTick(boolean calcFailed, boolean isSafeToCancel) {
-        IBaritone baritone = BaritoneAPI.getProvider().getPrimaryBaritone();
-        if (baritone == null) {
-            return defer();
-        }
-        IPlayerContext ctx = baritone.getPlayerContext();
-        ClientPlayerEntity player = ctx.player();
-        World world = ctx.world();
-        if (player == null || world == null) {
-            return defer();
-        }
-
-        if (!active) {
-            // 关闭时取消路径，让玩家停下
-            return halt();
-        }
-
-        long now = world.getTime();
-        if (lastActionTick != Long.MIN_VALUE && now - lastActionTick < ACTION_INTERVAL_TICKS) {
-            return defer();
-        }
-
-        if (currentGoal != null) {
-            if (calcFailed && now - goalSetTick > CALC_FAILED_GRACE_TICKS && !hasArrived(player, currentGoal, now)) {
-                stop();
-                notify(player, "前方无法通行，已停止（请调整朝向或清理障碍）");
-                return halt();
-            }
-            if (!hasArrived(player, currentGoal, now)) {
-                // 继续走向当前目标，不铺新的
-                return new PathingCommand(currentGoal, PathingCommandType.REVALIDATE_GOAL_AND_PATH);
-            }
-        }
-
-        int railSlot = findSlot(player.getInventory(), Items.RAIL);
-        if (railSlot == -1) {
-            stop();
-            notify(player, "背包里没有铁轨，已停止");
-            return halt();
-        }
-
-        Target target = computeTarget(player, world);
-        if (target == null) {
-            stop();
-            notify(player, "前方没有合适的地面，已停止");
-            return halt();
-        }
-
-        if (target.needBridge) {
-            return doBridge(ctx, player, world, target, now);
-        }
-
-        BlockPos railPos = target.railPos;
-        BlockState atRail = world.getBlockState(railPos);
-        if (atRail.isOf(Blocks.RAIL)) {
-            // 该处已有铁轨，直接走过去铺下一段
-            lastActionTick = now;
-            return moveTo(railPos, now);
-        }
-        if (!atRail.isAir() && !atRail.isReplaceable()) {
-            stop();
-            notify(player, "前方被阻挡，已停止");
-            return halt();
-        }
-
-        // 切换热键栏并同步给服务端（多人必须实时检测背包槽位）
-        selectSlot(player, railSlot);
-
-        // 构造对下方地面的右键命中：命中点在地块上表面中心，面朝上
-        BlockHitResult hit = new BlockHitResult(
-                new Vec3d(railPos.getX() + 0.5, railPos.getY(), railPos.getZ() + 0.5),
-                Direction.UP,
-                railPos.down(),
-                false
-        );
-        ctx.playerController().processRightClickBlock(player, world, Hand.MAIN_HAND, hit);
-
-        lastActionTick = now;
-        return moveTo(railPos, now);
-    }
-
-    /** 垫脚石：目标列下方悬空/太深，拿圆石右键侧面把缺口补上。 */
-    private PathingCommand doBridge(IPlayerContext ctx, ClientPlayerEntity player, World world, Target target, long now) {
-        int bridgeSlot = findSlot(player.getInventory(), Items.COBBLESTONE);
-        if (bridgeSlot == -1) {
-            stop();
-            notify(player, "前方需要垫脚石，但背包里没有圆石，已停止");
-            return halt();
-        }
-
-        BlockHitResult hit = findBridgeHit(player, world);
-        if (hit == null) {
-            stop();
-            notify(player, "无法确定垫脚石位置，已停止");
-            return halt();
-        }
-
-        selectSlot(player, bridgeSlot);
-        ctx.playerController().processRightClickBlock(player, world, Hand.MAIN_HAND, hit);
-
-        lastActionTick = now;
-        // 目标改为垫脚石的位置，让玩家先走到缺口边缘/补块上
-        return moveTo(target.railPos.down(), now);
-    }
-
-    /**
-     * 在玩家前方寻找一个可点击的实心方块侧面，把新方块垫进缺口。
-     * 从远到近找 3 格内的实心方块，点击其朝前的那一面。
-     */
-    private BlockHitResult findBridgeHit(ClientPlayerEntity player, World world) {
-        double rad = Math.toRadians(player.getYaw());
-        double dx = -Math.sin(rad);
-        double dz = Math.cos(rad);
-        Direction face = forwardDirection(dx, dz);
-        int py = player.getBlockY();
-
-        for (int dist = 3; dist >= 1; dist--) {
-            int ex = MathHelper.floor(player.getX() + dx * dist);
-            int ez = MathHelper.floor(player.getZ() + dz * dist);
-            for (int ey : new int[]{py - 1, py}) {
-                BlockPos edge = new BlockPos(ex, ey, ez);
-                if (isSolid(world, edge)) {
-                    Vec3d hitPos = new Vec3d(
-                            edge.getX() + 0.5 + face.getOffsetX() * 0.5,
-                            edge.getY() + 0.5 + face.getOffsetY() * 0.5,
-                            edge.getZ() + 0.5 + face.getOffsetZ() * 0.5);
-                    return new BlockHitResult(hitPos, face, edge, false);
-                }
-            }
-        }
-        return null;
-    }
-
-    /**
-     * 计算目标点：玩家前方 TARGET_DISTANCE 处（水平方向）的地面之上放铁轨的位置。
-     * 返回 null 表示前方不可用；target.needBridge=true 表示该列下方悬空/过深。
-     */
-    private Target computeTarget(ClientPlayerEntity player, World world) {
-        double rad = Math.toRadians(player.getYaw());
-        double dx = -Math.sin(rad);
-        double dz = Math.cos(rad);
-
-        int tx = MathHelper.floor(player.getX() + dx * TARGET_DISTANCE);
-        int tz = MathHelper.floor(player.getZ() + dz * TARGET_DISTANCE);
-        int py = player.getBlockY();
-
-        int groundY = findGroundY(world, tx, tz, py + 1);
-        if (groundY == Integer.MIN_VALUE || groundY < py - MAX_DROP) {
-            // 悬空（虚空）或落差过大 -> 需要垫脚石
-            return new Target(new BlockPos(tx, py, tz), true);
-        }
-        if (groundY > py + 2) {
-            // 前方太高，一步上不去
-            return null;
-        }
-        return new Target(new BlockPos(tx, groundY + 1, tz), false);
-    }
-
-    private int findGroundY(World world, int x, int z, int startY) {
-        int y = startY;
-        while (y > world.getBottomY()) {
-            if (isSolid(world, new BlockPos(x, y, z))) {
-                return y;
-            }
-            y--;
-        }
-        return Integer.MIN_VALUE;
-    }
-
-    /** 判定“实心可站立”的方块：非空气、非流体、不可被替换、且为实心。 */
-    private boolean isSolid(World world, BlockPos pos) {
-        BlockState state = world.getBlockState(pos);
-        return !state.isAir()
-                && state.getFluidState().isEmpty()
-                && !state.isReplaceable()
-                && state.isSolidBlock(world, pos);
-    }
-
-    private boolean hasArrived(ClientPlayerEntity player, GoalBlock goal, long now) {
-        BlockPos feet = player.getBlockPos();
-        int dx = Math.abs(feet.getX() - goal.x);
-        int dz = Math.abs(feet.getZ() - goal.z);
-        if (dx + dz <= 1) {
-            return true;
-        }
-        return now - goalSetTick > FORCE_PROGRESS_TICKS;
-    }
-
-    private PathingCommand moveTo(BlockPos pos, long now) {
-        currentGoal = new GoalBlock(pos);
-        goalSetTick = now;
-        return new PathingCommand(currentGoal, PathingCommandType.CANCEL_AND_SET_GOAL);
-    }
-
-    private PathingCommand defer() {
-        return new PathingCommand(null, PathingCommandType.DEFER);
-    }
-
-    /** 停止路径：CANCEL_AND_SET_GOAL + 空目标 = 取消寻路，让玩家停下。 */
-    private PathingCommand halt() {
-        return new PathingCommand(null, PathingCommandType.CANCEL_AND_SET_GOAL);
-    }
-
-    /** 热键栏（前 9 格）查找指定物品。 */
-    private int findSlot(PlayerInventory inventory, Item item) {
-        for (int i = 0; i < 9; i++) {
-            ItemStack stack = inventory.getStack(i);
-            if (stack.isOf(item)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    /** 切换选中槽位，并同步 UpdateSelectedSlotC2S 包给服务端。 */
-    private void selectSlot(ClientPlayerEntity player, int slot) {
-        player.getInventory().selectedSlot = slot;
-        if (player.networkHandler != null) {
-            player.networkHandler.sendPacket(new UpdateSelectedSlotC2SPacket(slot));
-        }
-    }
-
-    /** 把水平朝向向量映射到最近的轴方向（用于垫脚石点击的面）。 */
-    private Direction forwardDirection(double dx, double dz) {
-        if (Math.abs(dx) > Math.abs(dz)) {
-            return dx > 0 ? Direction.EAST : Direction.WEST;
-        }
-        return dz > 0 ? Direction.SOUTH : Direction.NORTH;
-    }
-
-    private void notify(ClientPlayerEntity player, String message) {
-        player.sendMessage(Text.literal("[AutoRail] " + message), false);
-    }
-
-    /** 下一步动作的规划结果。 */
-    private static final class Target {
-        final BlockPos railPos;      // 铁轨应放的位置；needBridge 时表示需要垫脚石的那一列
-        final boolean needBridge;    // 是否需要先垫脚石
-
-        Target(BlockPos railPos, boolean needBridge) {
-            this.railPos = railPos;
-            this.needBridge = needBridge;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/com/autorail/service/AutoRailService.java b/src/main/java/com/autorail/service/AutoRailService.java
new file mode 100644
index 0000000..54f7238
--- /dev/null
+++ b/src/main/java/com/autorail/service/AutoRailService.java
@@ -0,0 +1,118 @@
+package com.autorail.service;
+
+import com.autorail.pathing.RailPathfinder;
+import com.autorail.pathing.RailStep;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.network.ClientPlayerEntity;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.text.Text;
+import net.minecraft.util.math.BlockPos;
+
+import java.util.List;
+
+/**
+ * 铺轨调度服务（单例，GUI 与执行逻辑的桥梁）。
+ * 状态机：PLANNING（分片寻路）→ LAYING（行走铺轨）→ DONE / FAILED。
+ */
+public class AutoRailService {
+
+    public enum State { IDLE, PLANNING, LAYING, DONE, FAILED }
+
+    /** 每 tick 寻路展开预算（节点数）。 */
+    private static final int PLAN_BUDGET_PER_TICK = 4096;
+
+    private State state = State.IDLE;
+    private RailPathfinder planner;
+    private RailExecutor executor;
+    private String failKey;
+
+    public State getState() {
+        return state;
+    }
+
+    public void begin(ClientWorld world, ClientPlayerEntity player, List<BlockPos> checkpoints) {
+        planner = new RailPathfinder(world, checkpoints);
+        executor = null;
+        failKey = null;
+        state = State.PLANNING;
+        chat(player, "autorail.msg.plan.start", checkpoints.size());
+    }
+
+    public void stop(ClientPlayerEntity player) {
+        if (executor != null) {
+            executor.releaseKeys();
+        }
+        boolean wasActive = state == State.PLANNING || state == State.LAYING;
+        planner = null;
+        executor = null;
+        state = State.IDLE;
+        if (wasActive && player != null) {
+            chat(player, "autorail.msg.stopped");
+        }
+    }
+
+    public void tick(MinecraftClient client) {
+        if (state != State.PLANNING && state != State.LAYING) {
+            return;
+        }
+        ClientPlayerEntity player = client.player;
+        ClientWorld world = client.world;
+        if (player == null || world == null) {
+            hardStop();
+            return;
+        }
+        if (state == State.PLANNING) {
+            planner.step(PLAN_BUDGET_PER_TICK);
+            if (planner.getState() == RailPathfinder.State.FOUND) {
+                List<RailStep> steps = planner.getResult();
+                executor = new RailExecutor(world, steps);
+                state = State.LAYING;
+                chat(player, "autorail.msg.plan.done", steps.size());
+            } else if (planner.getState() == RailPathfinder.State.FAILED) {
+                failKey = planner.getFailKey();
+                state = State.FAILED;
+                chat(player, failKey);
+            }
+            return;
+        }
+        executor.tick(client);
+        if (executor.isFinished()) {
+            if (executor.getFailKey() != null) {
+                failKey = executor.getFailKey();
+                state = State.FAILED;
+                chat(player, failKey);
+            } else {
+                state = State.DONE;
+                chat(player, "autorail.msg.lay.done", executor.getTotal());
+            }
+        }
+    }
+
+    private void hardStop() {
+        if (executor != null) {
+            executor.releaseKeys();
+        }
+        planner = null;
+        executor = null;
+        state = State.IDLE;
+    }
+
+    /** GUI 底部状态行。 */
+    public Text statusText() {
+        return switch (state) {
+            case IDLE -> Text.translatable("autorail.gui.status.idle");
+            case PLANNING -> Text.translatable("autorail.gui.status.planning",
+                    planner == null ? 0 : planner.getOpened());
+            case LAYING -> executor == null ? Text.translatable("autorail.gui.status.idle")
+                    : Text.translatable("autorail.gui.status.laying", executor.getPlaced(), executor.getTotal());
+            case DONE -> executor == null ? Text.translatable("autorail.gui.status.idle")
+                    : Text.translatable("autorail.gui.status.done", executor.getTotal());
+            case FAILED -> Text.translatable("autorail.gui.status.failed",
+                    Text.translatable(failKey == null ? "autorail.err.pathNotFound" : failKey));
+        };
+    }
+
+    private static void chat(ClientPlayerEntity player, String key, Object... args) {
+        player.sendMessage(Text.literal("[AutoRail] ").append(Text.translatable(key, args)), false);
+    }
+}
diff --git a/src/main/java/com/autorail/service/RailExecutor.java b/src/main/java/com/autorail/service/RailExecutor.java
new file mode 100644
index 0000000..d2f7abd
--- /dev/null
+++ b/src/main/java/com/autorail/service/RailExecutor.java
@@ -0,0 +1,362 @@
+package com.autorail.service;
+
+import com.autorail.pathing.RailStep;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.network.ClientPlayerEntity;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.item.Items;
+import net.minecraft.network.packet.c2s.play.UpdateSelectedSlotC2SPacket;
+import net.minecraft.util.Hand;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.math.MathHelper;
+import net.minecraft.util.math.Vec3d;
+
+import java.util.List;
+
+/**
+ * 铺轨执行器：沿已规划好的路径控制玩家行走，并合法放置铁轨/圆石。
+ *
+ * 行走：平滑转向 + 按下前进/跳跃键（客户端输入，服务端正常结算）；
+ * 放置：切换快捷栏 + {@code processRightClickBlock} 右键交互，
+ * 绝不 world.setBlockState，多人服务器可信任。
+ * 玩家只会走在“已完成”的节点上，放置窗口始终领先于行走目标。
+ */
+public class RailExecutor {
+
+    /** 放置动作间隔（tick），4 tick = 200ms，符合多人服务器节奏。 */
+    private static final int ACTION_INTERVAL = 4;
+    /** 放置距离的平方（略保守于 4.5 格交互距离）。 */
+    private static final double REACH_SQ = 4.2 * 4.2;
+    /** 一次尝试放置的路径窗口（节点数）。 */
+    private static final int PLACE_WINDOW = 4;
+    /** 行走目标领先玩家所在节点的格数。 */
+    private static final int WALK_AHEAD = 2;
+    /** 原地卡住判定（tick）。 */
+    private static final int STUCK_FAIL_TICKS = 120;
+    /** 总进度停滞判定（tick）。 */
+    private static final int STALL_FAIL_TICKS = 300;
+    /** 每 tick 最大转角（度）。 */
+    private static final float MAX_TURN_PER_TICK = 60.0f;
+
+    private final ClientWorld world;
+    private final List<RailStep> path;
+    private int cursor;
+    private int standIndex;
+    private long tickCounter;
+    // 初始化为 -ACTION_INTERVAL-1：tickCounter 从 1 开始时 1-(-5)=6 >= ACTION_INTERVAL，
+    // 第一次满足距离条件即可放置；绝不能用 Long.MIN_VALUE，否则 long 减法溢出得到大负数，
+    // “上次放置至今”恒为负，放置动作永远不会触发。
+    private long lastActionTick = -ACTION_INTERVAL - 1L;
+    private long stuckSince = -1;
+    private int stallTicks;
+    private int lastCursor;
+    private int jumpTicks;
+    private boolean lastNeedMove;
+    private String failKey;
+    private boolean finished;
+
+    public RailExecutor(ClientWorld world, List<RailStep> path) {
+        this.world = world;
+        this.path = path;
+    }
+
+    public boolean isFinished() {
+        return finished || failKey != null;
+    }
+
+    public String getFailKey() {
+        return failKey;
+    }
+
+    public int getTotal() {
+        return path.size();
+    }
+
+    public int getPlaced() {
+        return cursor;
+    }
+
+    public void tick(MinecraftClient client) {
+        if (finished || failKey != null) {
+            return;
+        }
+        ClientPlayerEntity player = client.player;
+        if (player == null) {
+            return;
+        }
+        tickCounter++;
+
+        // 1) 推进已完成（已有铁轨）的节点
+        while (cursor < path.size() && isDone(path.get(cursor))) {
+            cursor++;
+        }
+        if (cursor >= path.size()) {
+            finished = true;
+            releaseKeys();
+            return;
+        }
+
+        // 2) 行走（放置阶段会再覆盖朝向到交互点）
+        standIndex = findStandIndex(player);
+        move(client, player);
+
+        // 3) 放置：窗口内第一个“可达且未完成”的节点
+        if (tickCounter - lastActionTick >= ACTION_INTERVAL) {
+            for (int i = cursor; i < Math.min(cursor + PLACE_WINDOW, path.size()); i++) {
+                RailStep s = path.get(i);
+                if (isDone(s)) {
+                    continue;
+                }
+                if (player.getEyePos().squaredDistanceTo(Vec3d.ofCenter(s.railPos())) > REACH_SQ) {
+                    continue;
+                }
+                attemptPlace(client, player, i);
+                lastActionTick = tickCounter;
+                break;
+            }
+        }
+
+        // 4) 卡住 / 停滞检测
+        if (lastNeedMove && player.isOnGround() && speedSq(player) < 2.0e-4) {
+            if (stuckSince < 0) {
+                stuckSince = tickCounter;
+            } else if (tickCounter - stuckSince > 20) {
+                jumpTicks = Math.max(jumpTicks, 6); // 先尝试跳一下
+            }
+            if (tickCounter - stuckSince > STUCK_FAIL_TICKS) {
+                fail("autorail.err.stuck");
+                return;
+            }
+        } else {
+            stuckSince = -1;
+        }
+        if (cursor == lastCursor) {
+            if (++stallTicks > STALL_FAIL_TICKS) {
+                fail("autorail.err.stuck");
+                return;
+            }
+        } else {
+            lastCursor = cursor;
+            stallTicks = 0;
+        }
+    }
+
+    /** 行走控制：朝已铺设前方的节点平滑转向并前进，需要上坡时自动跳跃。 */
+    private void move(MinecraftClient client, ClientPlayerEntity player) {
+        int frontier = cursor - 1; // 最高已完成节点
+        int walkIdx = Math.min(Math.max(frontier, 0), Math.min(standIndex + WALK_AHEAD, path.size() - 1));
+        BlockPos t = path.get(walkIdx).railPos();
+        Vec3d center = new Vec3d(t.getX() + 0.5, t.getY(), t.getZ() + 0.5);
+        double dx = center.x - player.getX();
+        double dz = center.z - player.getZ();
+        double hSq = dx * dx + dz * dz;
+        lastNeedMove = hSq > 0.6;
+        if (lastNeedMove) {
+            aimAt(player, center.add(0, 0.5, 0));
+            client.options.forwardKey.setPressed(true);
+        } else {
+            client.options.forwardKey.setPressed(false);
+        }
+        if (t.getY() > player.getBlockY() && hSq < 9.0) {
+            jumpTicks = 6;
+        }
+        if (jumpTicks > 0) {
+            client.options.jumpKey.setPressed(true);
+            jumpTicks--;
+        } else {
+            client.options.jumpKey.setPressed(false);
+        }
+    }
+
+    private void attemptPlace(MinecraftClient client, ClientPlayerEntity player, int i) {
+        RailStep s = path.get(i);
+        BlockPos rail = s.railPos();
+        BlockState at = world.getBlockState(rail);
+        if (!at.isAir() && !at.isReplaceable() && !at.isOf(Blocks.RAIL)) {
+            fail("autorail.err.blocked");
+            return;
+        }
+
+        BlockPos support = rail.down();
+        BlockState sup = world.getBlockState(support);
+        if (!sup.isSolidBlock(world, support) || !sup.getFluidState().isEmpty()) {
+            // 支撑缺失（悬空/水中）：先垫圆石
+            int slot = findSlot(player, Items.COBBLESTONE);
+            if (slot < 0) {
+                fail("autorail.err.noCobble");
+                return;
+            }
+            BlockHitResult hit = findSupportHit(player, i, support);
+            if (hit == null) {
+                fail("autorail.err.noHit");
+                return;
+            }
+            selectSlot(player, slot);
+            aimAt(player, hit.getPos());
+            client.interactionManager.interactBlock(player, Hand.MAIN_HAND, hit);
+            player.swingHand(Hand.MAIN_HAND);
+            return;
+        }
+
+        int slot = findSlot(player, Items.RAIL);
+        if (slot < 0) {
+            fail("autorail.err.noRail");
+            return;
+        }
+        BlockHitResult hit = new BlockHitResult(
+                new Vec3d(support.getX() + 0.5, support.getY() + 1.0, support.getZ() + 0.5),
+                Direction.UP, support, false);
+        selectSlot(player, slot);
+        aimAt(player, hit.getPos());
+        client.interactionManager.interactBlock(player, Hand.MAIN_HAND, hit);
+        player.swingHand(Hand.MAIN_HAND);
+    }
+
+    /** 找一个可点击的实心面，把圆石垫进 support 位置。优先用上一节点的支撑侧面。 */
+    private BlockHitResult findSupportHit(ClientPlayerEntity player, int i, BlockPos support) {
+        if (i > 0) {
+            BlockPos prevRail = path.get(i - 1).railPos();
+            BlockPos prevSupport = prevRail.down();
+            if (isSolid(prevSupport)) {
+                Direction face = horizontalDirection(prevRail, path.get(i).railPos());
+                if (face != null) {
+                    return faceHit(prevSupport, face);
+                }
+            }
+        }
+        double best = Double.MAX_VALUE;
+        BlockHitResult bestHit = null;
+        Vec3d eye = player.getEyePos();
+        for (Direction face : Direction.values()) {
+            BlockPos nb = support.offset(face.getOpposite());
+            if (!isSolid(nb)) {
+                continue;
+            }
+            BlockHitResult h = faceHit(nb, face);
+            double d = eye.squaredDistanceTo(h.getPos());
+            if (d < best) {
+                best = d;
+                bestHit = h;
+            }
+        }
+        return bestHit;
+    }
+
+    /** 点击 block 的 face 面（新方块会出现在 support 一侧）。 */
+    private static BlockHitResult faceHit(BlockPos block, Direction face) {
+        Vec3d p = new Vec3d(
+                block.getX() + 0.5 + face.getOffsetX() * 0.5,
+                block.getY() + 0.5 + face.getOffsetY() * 0.5,
+                block.getZ() + 0.5 + face.getOffsetZ() * 0.5);
+        return new BlockHitResult(p, face, block, false);
+    }
+
+    private static Direction horizontalDirection(BlockPos from, BlockPos to) {
+        int dx = to.getX() - from.getX();
+        int dz = to.getZ() - from.getZ();
+        if (Math.abs(dx) > Math.abs(dz)) {
+            return dx > 0 ? Direction.EAST : Direction.WEST;
+        }
+        if (dz != 0) {
+            return dz > 0 ? Direction.SOUTH : Direction.NORTH;
+        }
+        return null;
+    }
+
+    /** 在窗口内寻找离玩家最近的路径节点索引。 */
+    private int findStandIndex(ClientPlayerEntity player) {
+        int from = Math.max(0, standIndex - 4);
+        int to = Math.min(path.size() - 1, standIndex + 48);
+        int bestI = standIndex;
+        double bestD = Double.MAX_VALUE;
+        double px = player.getX();
+        double pz = player.getZ();
+        for (int i = from; i <= to; i++) {
+            BlockPos r = path.get(i).railPos();
+            double dx = r.getX() + 0.5 - px;
+            double dz = r.getZ() + 0.5 - pz;
+            double d = dx * dx + dz * dz;
+            if (d < bestD) {
+                bestD = d;
+                bestI = i;
+            }
+        }
+        return bestI;
+    }
+
+    private boolean isDone(RailStep s) {
+        return world.getBlockState(s.railPos()).isOf(Blocks.RAIL);
+    }
+
+    private boolean isSolid(BlockPos pos) {
+        BlockState state = world.getBlockState(pos);
+        return !state.isAir()
+                && state.getFluidState().isEmpty()
+                && !state.isReplaceable()
+                && state.isSolidBlock(world, pos);
+    }
+
+    private static double speedSq(ClientPlayerEntity player) {
+        Vec3d v = player.getVelocity();
+        return v.x * v.x + v.z * v.z;
+    }
+
+    /** 把视线转向目标点（限制每 tick 转角，避免瞬移式甩头）。 */
+    private static void aimAt(ClientPlayerEntity player, Vec3d target) {
+        Vec3d eye = player.getEyePos();
+        double dx = target.x - eye.x;
+        double dy = target.y - eye.y;
+        double dz = target.z - eye.z;
+        double h = Math.sqrt(dx * dx + dz * dz);
+        float yaw = (float) Math.toDegrees(Math.atan2(-dx, dz));
+        float pitch = (float) -Math.toDegrees(Math.atan2(dy, h));
+        player.setYaw(stepAngle(player.getYaw(), yaw));
+        player.setPitch(stepAngle(player.getPitch(), pitch));
+    }
+
+    private static float stepAngle(float cur, float target) {
+        float d = MathHelper.wrapDegrees(target - cur);
+        if (d > MAX_TURN_PER_TICK) {
+            d = MAX_TURN_PER_TICK;
+        } else if (d < -MAX_TURN_PER_TICK) {
+            d = -MAX_TURN_PER_TICK;
+        }
+        return MathHelper.wrapDegrees(cur + d);
+    }
+
+    /** 快捷栏查找指定物品。 */
+    private static int findSlot(ClientPlayerEntity player, net.minecraft.item.Item item) {
+        for (int i = 0; i < 9; i++) {
+            if (player.getInventory().getStack(i).isOf(item)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    /** 切换选中槽位并同步给服务端。 */
+    private static void selectSlot(ClientPlayerEntity player, int slot) {
+        player.getInventory().selectedSlot = slot;
+        if (player.networkHandler != null) {
+            player.networkHandler.sendPacket(new UpdateSelectedSlotC2SPacket(slot));
+        }
+    }
+
+    private void fail(String key) {
+        failKey = key;
+        releaseKeys();
+    }
+
+    public void releaseKeys() {
+        MinecraftClient mc = MinecraftClient.getInstance();
+        if (mc == null || mc.options == null) {
+            return;
+        }
+        mc.options.forwardKey.setPressed(false);
+        mc.options.jumpKey.setPressed(false);
+    }
+}
diff --git a/src/main/resources/assets/autorail/lang/en_us.json b/src/main/resources/assets/autorail/lang/en_us.json
index 5bd51ca..f63cbec 100644
--- a/src/main/resources/assets/autorail/lang/en_us.json
+++ b/src/main/resources/assets/autorail/lang/en_us.json
@@ -1,4 +1,39 @@
 {
-  "key.autorail.toggle": "Toggle Auto Rail",
-  "category.autorail": "AutoRail"
+  "autorail.gui.title": "AutoRail",
+  "autorail.gui.hint": "Format: x y z (or x z for auto height). ~ = current, supports ~5 / ~-3 offsets",
+  "autorail.gui.hint.laying": "Laying in progress: close this screen so the player keeps walking",
+  "autorail.gui.start": "Start",
+  "autorail.gui.start.ph": "Empty = current position",
+  "autorail.gui.dest": "Destination",
+  "autorail.gui.dest.ph": "e.g. 100 64 -200",
+  "autorail.gui.waypoints": "Waypoints (visited in order)",
+  "autorail.gui.wp.ph": "e.g. ~ 100",
+  "autorail.gui.add": "+ Add waypoint",
+  "autorail.gui.remove": "X",
+  "autorail.gui.begin": "Start laying",
+  "autorail.gui.stop": "Stop",
+  "autorail.gui.close": "Close",
+  "autorail.gui.status.idle": "Idle",
+  "autorail.gui.status.planning": "Pathfinding… {0} nodes opened",
+  "autorail.gui.status.laying": "Laying rails… {0} / {1}",
+  "autorail.gui.status.done": "Done! {0} rails placed",
+  "autorail.gui.status.failed": "Failed: {0}",
+  "autorail.err.needWorld": "Enter a world first",
+  "autorail.err.emptyCoord": "Coordinate is empty",
+  "autorail.err.coordFormat": "Bad coordinate format (e.g. 100 64 -200 or ~ 10 ~)",
+  "autorail.err.noGround": "No usable ground in that column",
+  "autorail.err.startFar": "Start must be near the player (within 6 blocks horizontal, 8 vertical)",
+  "autorail.err.startEqDest": "Start and destination are the same",
+  "autorail.err.startInvalid": "Cannot place a rail at the start (check headroom and support)",
+  "autorail.err.pathNotFound": "No rail-able path found (try adding waypoints)",
+  "autorail.err.tooFar": "Too far or too complex for the pathfinder",
+  "autorail.err.noRail": "No rails left in the hotbar",
+  "autorail.err.noCobble": "Bridging needs cobblestone in the hotbar",
+  "autorail.err.noHit": "No clickable block to place against",
+  "autorail.err.blocked": "Path blocked (cannot place a rail there)",
+  "autorail.err.stuck": "Player stuck - clear the obstacle and retry",
+  "autorail.msg.plan.start": "Pathfinding ({0} checkpoints)…",
+  "autorail.msg.plan.done": "Path found: {0} blocks. Laying rails - avoid opening other screens",
+  "autorail.msg.lay.done": "Done! {0} rails placed",
+  "autorail.msg.stopped": "Stopped"
 }
diff --git a/src/main/resources/assets/autorail/lang/zh_cn.json b/src/main/resources/assets/autorail/lang/zh_cn.json
index 036b5ae..27ee53d 100644
--- a/src/main/resources/assets/autorail/lang/zh_cn.json
+++ b/src/main/resources/assets/autorail/lang/zh_cn.json
@@ -1,4 +1,39 @@
 {
-  "key.autorail.toggle": "切换自动铺轨",
-  "category.autorail": "自动铺轨"
+  "autorail.gui.title": "AutoRail 自动铺轨",
+  "autorail.gui.hint": "坐标格式：x y z（或 x z 自动取地面）；~ 表示当前，支持 ~5 / ~-3 偏移",
+  "autorail.gui.hint.laying": "铺轨进行中：关闭此界面玩家才会继续行走",
+  "autorail.gui.start": "起始点",
+  "autorail.gui.start.ph": "留空 = 当前位置",
+  "autorail.gui.dest": "目标点",
+  "autorail.gui.dest.ph": "例如 100 64 -200",
+  "autorail.gui.waypoints": "途径点（按顺序经过，可留空）",
+  "autorail.gui.wp.ph": "例如 ~ 100",
+  "autorail.gui.add": "+ 添加途径点",
+  "autorail.gui.remove": "✕",
+  "autorail.gui.begin": "开始铺轨",
+  "autorail.gui.stop": "停止",
+  "autorail.gui.close": "关闭",
+  "autorail.gui.status.idle": "待机中",
+  "autorail.gui.status.planning": "寻路中… 已展开 {0} 个节点",
+  "autorail.gui.status.laying": "铺轨中… {0} / {1}",
+  "autorail.gui.status.done": "完成！共铺设 {0} 格铁轨",
+  "autorail.gui.status.failed": "失败：{0}",
+  "autorail.err.needWorld": "请先进入世界",
+  "autorail.err.emptyCoord": "坐标不能为空",
+  "autorail.err.coordFormat": "坐标格式错误（示例：100 64 -200 或 ~ 10 ~）",
+  "autorail.err.noGround": "该坐标列找不到可用的地面",
+  "autorail.err.startFar": "起始点必须在玩家附近（水平 6 格、垂直 8 格以内）",
+  "autorail.err.startEqDest": "起始点和目标点相同",
+  "autorail.err.startInvalid": "起始点无法放置铁轨（检查上方空间与下方支撑）",
+  "autorail.err.pathNotFound": "找不到可铺轨的路径（试试增加途径点绕行）",
+  "autorail.err.tooFar": "距离太远或地形太复杂，超出寻路上限",
+  "autorail.err.noRail": "快捷栏里没有铁轨了",
+  "autorail.err.noCobble": "前方需要垫脚，但快捷栏里没有圆石",
+  "autorail.err.noHit": "找不到可交互的方块来放置",
+  "autorail.err.blocked": "路径被阻挡（该位置无法放置铁轨）",
+  "autorail.err.stuck": "玩家卡住了，请清理障碍后重试",
+  "autorail.msg.plan.start": "开始寻路（{0} 个检查点）…",
+  "autorail.msg.plan.done": "路径规划完成：{0} 格，开始铺轨（请勿打开其他界面）",
+  "autorail.msg.lay.done": "铺轨完成！共 {0} 格",
+  "autorail.msg.stopped": "已停止"
 }
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index 8dcea1d..f6d95c6 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -3,7 +3,7 @@
   "id": "autorail",
   "version": "${version}",
   "name": "AutoRail",
-  "description": "面向方向自动铺设铁轨（基于 Baritone API）。",
+  "description": "自动铺铁轨模组：内置 A* 寻路规划可铺轨路线，控制玩家边走边合法右键放置铁轨/圆石，不依赖 Baritone。",
   "authors": [
     "AutoRail"
   ],
@@ -19,8 +19,5 @@
     "minecraft": "~1.21.4",
     "java": ">=21",
     "fabric-api": "*"
-  },
-  "suggests": {
-    "baritone": "*"
   }
 }