feat(plugin): scaffold RPCP plugin loading core

- Add JarFile-based plugin.json manifest reading and validation
- Implement reflection-based plugin class instantiation (Data or no-arg constructor)
- Wrap Tool objects into OllamaFunctionTool with basic parameter/response handling
- Implement ToolArguments storage and ToolResponse record
- Extract RPCP_SOURCE constant; add plugin name validation
- Update Data interface: getLoadedPlugins() returns LoadedPlugin[]
- Fix launcher package references (me.zacharias.chat → me.neurodock)

TODO: Extract FileSystem from JAR, populate PluginMetadata, complete
OllamaFunctionArgument↔ToolArguments wrapping, invoke plugin lifecycle hooks

Signed-off-by: zacharias <alienfromdia@proton.me>

Core/src/main/java/me/neurodock/core/Core.java

@@ -3,6 +3,9 @@ package me.neurodock.core;
 import me.neurodock.core.memory.*;
 import me.neurodock.ollama.*;
 import me.neurodock.ollama.exceptions.OllamaToolErrorException;
+import me.neurodock.plugin.Data;
+import me.neurodock.plugin.LoadedPlugin;
+import me.neurodock.plugin.Plugin;
 import me.neurodock.plugin.loader.Loader;
 import me.neurodock.plugin.exceptions.PluginLoadingException;
 import org.intellij.lang.annotations.MagicConstant;
@@ -15,14 +18,19 @@ import java.net.*;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.FileSystem;
 import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
 
 import static me.neurodock.ollama.OllamaFunctionArgument.deconstructOllamaFunctionArguments;
+import static me.neurodock.plugin.Plugin.UNKNOWN_PLUGIN;
 
 /**
  * The Main class for the System, responsible for managing the OllamaObject, tools, and the Ollama API.
@@ -822,21 +830,65 @@ public class Core {
         if(files == null) {
             return;
         }
+        LoaderPluginData data = new LoaderPluginData();
         Loader loader = new Loader();
         for(File file : files) {
-            try(FileSystem fs = FileSystems.newFileSystem(file.toPath())){
+            try(JarFile jar = new JarFile(file)){
-                if(!fs.getPath("/plugin.json").toFile().exists())
+                JarEntry pluginJsonFile = jar.getJarEntry("/plugin.json");
+                if(pluginJsonFile == null)
                 {
                     throw new PluginLoadingException("Plugin does not contain a plugin.json file", file.getName());
                 }
-                //JSONObject pluginJson = new JSONObject(new String(fs.getPath("/plugin.json").toFile().readAllBytes()));
+                if(jar.getJarEntry("/me/neurodock/plugin/Plugin") != null)
-                //Plugin plugin = loader.loadPlugin(pluginJson, fs);
+                    throw new PluginLoadingException("Plugin bundles NeuroDock API classes. Consider using compileOnly", file.getName());
+                StringBuilder pluginJsonData = new StringBuilder();
+                String tmp = null;
+                BufferedReader inReader = new BufferedReader(new InputStreamReader(jar.getInputStream(pluginJsonFile)));
+                while((tmp = inReader.readLine()) != null)
+                {
+                    pluginJsonData.append(tmp);
+                }
+                JSONObject pluginJson = new JSONObject(pluginJsonData.toString());
+                LoadedPlugin plugin = loader.loadPlugin(pluginJson, file.toPath(), data);
+
+                data.addPlugin(plugin);
+
             } catch (IOException e) {
                 throw new RuntimeException(e);
             }
         }
     }
 
+    private static class LoaderPluginData extends Data {
+
+        ArrayList<LoadedPlugin> plugins = new ArrayList<>();
+
+        @Override
+        public File getDataDictionary() {
+            return DATA_DIR;
+        }
+
+        @Override
+        public LoadedPlugin[] getLoadedPlugins() {
+            return plugins.toArray(new LoadedPlugin[0]);
+        }
+
+        @Override
+        public File getCacheDirectory() {
+            return CACHE_DIRECTORY;
+        }
+
+        public void addPlugin(LoadedPlugin plugin)
+        {
+            plugins.add(plugin);
+        }
+
+        public void removePlugin(LoadedPlugin plugin)
+        {
+            plugins.remove(plugin);
+        }
+    }
+
     /**
      * Represents the source of a tool.
      * <p>

Core/src/main/java/me/neurodock/plugin/loader/Loader.java

@@ -3,14 +3,33 @@ package me.neurodock.plugin.loader;
 import jdk.jshell.spi.ExecutionControl;
 import me.neurodock.core.Pair;
 import me.neurodock.ollama.*;
+import me.neurodock.ollama.exceptions.OllamaToolErrorException;
+import me.neurodock.plugin.Data;
+import me.neurodock.plugin.LoadedPlugin;
 import me.neurodock.plugin.Plugin;
 import me.neurodock.plugin.PluginMetadata;
+import me.neurodock.plugin.exceptions.PluginLoadingException;
 import me.neurodock.plugin.exceptions.ToolRuntimeException;
 import me.neurodock.plugin.tool.Tool;
+import me.neurodock.plugin.tool.ToolArguments;
 import me.neurodock.plugin.tool.ToolResponse;
 import org.jetbrains.annotations.NotNull;
+import org.json.JSONObject;
 
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Parameter;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.FileSystem;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.Arrays;
+
+import static me.neurodock.plugin.Plugin.UNKNOWN_PLUGIN;
 
 public class Loader {
     private final ArrayList<Pair<Plugin, PluginMetadata>> plugins = new ArrayList<>();
@@ -19,11 +38,12 @@ public class Loader {
      * Mock example!
      * @return
      */
-    public OllamaTool getTool() {
+    public OllamaTool[] getTools(Plugin plugin) {
-        // Mock example!
-        Tool tool = null;
 
-        return new OllamaFunctionTool() {
+        ArrayList<OllamaTool> tools = new ArrayList<>();
+
+        for(Tool tool : plugin.getTools()) {
+            tools.add(new OllamaFunctionTool() {
                 @Override
                 public @NotNull String name() {
                     return tool.name();
@@ -43,13 +63,18 @@ public class Loader {
                 @Override
                 public @NotNull OllamaToolResponse function(OllamaFunctionArgument... args) {
                     // Wrap OllamaFunctionArguments[] to ether ToolArgument[] or ToolArguments(current implementation)
+                    ToolArguments toolArgs = new ToolArguments();
+                    for (OllamaFunctionArgument arg : args) {
+                        toolArgs.addArgument(arg.argument(), arg.value());
+                    }
+                    ToolResponse toolResponse;
                     try {
-                    ToolResponse toolResponse = tool.callTool(null);
+                        toolResponse = tool.callTool(toolArgs);
                     } catch (ToolRuntimeException e) {
-                    throw new RuntimeException(e);
+                        throw new OllamaToolErrorException(name(), e);
                     }
                     // Wrap ToolResponce to an OllamaToolRespnce(Well I see a typo here now)
-                return null;
+                    return new OllamaToolResponse(toolResponse.name(), toolResponse.response());
                 }
 
                 @Override
@@ -57,6 +82,66 @@ public class Loader {
                     // Replaces the toString which is used thru out the Core and OllamaObject to get the JSON representation of a Function Tool
                     return tool.getToolJSON();
                 }
-        };
+            });
+        }
+
+        return tools.toArray(tools.toArray(new OllamaTool[0]));
+
+    }
+
+    public LoadedPlugin loadPlugin(JSONObject pluginJson, Path pluginJar, Data data) {
+        if(!pluginJson.has("name") || !(pluginJson.get("name") instanceof String pluginName))
+            throw new PluginLoadingException("Malformed plugin json", UNKNOWN_PLUGIN);
+        if(!pluginJson.has("entryPoint") || !(pluginJson.get("entryPoint") instanceof String pluginEntryPoint))
+            throw new PluginLoadingException("Malformed plugin json", pluginName);
+        Path pluginEntryPointFile = fs.getPath("/"+pluginEntryPoint.replaceAll("\\.", "/")+".class");
+        if(!Files.exists(pluginEntryPointFile)) throw new PluginLoadingException("Missing plugin entrypoint", pluginName);
+
+        Plugin plugin = null;
+        URLClassLoader classLoader;
+
+        try {
+            classLoader = new URLClassLoader(
+                    new URL[]{pluginJar.toUri().toURL()},
+                    getClass().getClassLoader()
+            );
+
+            Class<?> pluginClass = classLoader.loadClass(pluginEntryPoint);
+
+            if(!Plugin.class.isAssignableFrom(pluginClass)) throw new PluginLoadingException(
+                    "Entrypoint does not implement Plugin",
+                    pluginName
+            );
+
+            Class<? extends Plugin> typedClass =
+                    pluginClass.asSubclass(Plugin.class);
+
+            for(Constructor<?> constructor : typedClass.getDeclaredConstructors())
+            {
+                Parameter[] parameters = constructor.getParameters();
+                if(parameters.length == 1 &&
+                    parameters[0].getType() == Data.class)
+                {
+                    plugin = (Plugin) constructor.newInstance(data);
+                }
+                else if(parameters.length == 0)
+                {
+                    plugin = (Plugin) constructor.newInstance();
+                }
+            }
+        }catch (ClassNotFoundException | InvocationTargetException | InstantiationException | IllegalAccessException | IOException e)
+        {
+            throw new PluginLoadingException("Failed to load plugin jar", e, pluginName);
+        }
+
+        if(plugin == null)
+        {
+            throw new PluginLoadingException(
+                    "Missing proper constructor",
+                    pluginName
+            );
+        }
+
+        return new LoadedPlugin(plugin, classLoader, null/*TODO: MUST BE REPLACED WITH ACTUAL PLUGIN METADATA! this is read from the PluginEntyPoint*/);
     }
 }

Plugin-API/src/main/java/me/neurodock/plugin/Data.java

@@ -4,6 +4,6 @@ import java.io.File;
 
 public abstract class Data {
     public abstract File getDataDictionary();
-    public abstract LoadedPlugins getLoadedPlugins();
+    public abstract LoadedPlugin[] getLoadedPlugins();
     public abstract File getCacheDirectory();
 }

Plugin-API/src/main/java/me/neurodock/plugin/LoadedPlugin.java

@@ -0,0 +1,9 @@
+package me.neurodock.plugin;
+
+public record LoadedPlugin(
+        Plugin plugin,
+        ClassLoader loader,
+        PluginMetadata metaData
+) {
+
+}

Plugin-API/src/main/java/me/neurodock/plugin/LoadedPlugins.java

@@ -1,5 +0,0 @@
-package me.neurodock.plugin;
-
-public class LoadedPlugins {
-    // TODO: Implement
-}

Plugin-API/src/main/java/me/neurodock/plugin/Plugin.java

@@ -9,6 +9,10 @@ import org.jetbrains.annotations.NotNull;
  * Entry point for the plugin, this is required for the plugin to work, and you MUST annotate it with {@link PluginEntryPoint}
  */
 public abstract class Plugin {
+    /**
+     * This is a magic constant plugin name used for when a plugin's name cant be loaded
+     */
+    public static final String UNKNOWN_PLUGIN = "UNKNOWN PLUGIN";
 
     /**
      * This shuld be used if {@link PluginEntryPoint#requireData()} is false (default)
@@ -29,12 +33,12 @@ public abstract class Plugin {
     public void onInit(){}
 
     /**
-     * This will be called if the core gets a "fetal" exception or fails to fetch certain info
+     * This will be called if the core gets a "fetal" exception or fails to fetch certain info AND the plugin was able to be loaded.
      */
     public void onDisable(){}
 
     /**
-     * This will be called after all plugins have been initialised; here it is safe to perform potential stuff where you load data from optional dependencies, or similar things
+     * This will be called after all plugins have been initialized; here it is safe to perform potential stuff where you load data from optional dependencies, or similar things
      */
     public void onEnable(){}
 

Plugin-API/src/main/java/me/neurodock/plugin/annotations/PluginEntryPoint.java

@@ -9,5 +9,10 @@ import java.lang.annotation.Target;
 @Target(ElementType.TYPE)
 public @interface PluginEntryPoint {
     boolean requireData() default true;
+
+    /**
+     * NOT YET IMPLEMENTED!
+     * @return An array of plugins this plugin depends on
+     */
     String[] dependencies() default {};
 }

Plugin-API/src/main/java/me/neurodock/plugin/exceptions/PluginLoadingException.java

@@ -4,4 +4,9 @@ public class PluginLoadingException extends RuntimeException {
     public PluginLoadingException(String message, String pluginName) {
         super("Plugin: \""+pluginName+"\"> "+message);
     }
+
+    public PluginLoadingException(String message, Throwable cause, String pluginName)
+    {
+        super("Plugin: \""+pluginName+"\"> "+message, cause);
+    }
 }

Plugin-API/src/main/java/me/neurodock/plugin/tool/Tool.java

@@ -6,6 +6,11 @@ import org.jetbrains.annotations.NotNull;
 import org.json.JSONObject;
 
 public abstract class Tool {
+    /**
+     * Magic constant for RPCP sources.<br>
+     * This is solely here to replace the case of a magic string being used in the code
+     */
+    public static final String RPCP_SOURCE = "RPCP";
 
     /**
      * The parent plugin of this tool, used by {@link Tool#getToolJSON()}.
@@ -29,7 +34,7 @@ public abstract class Tool {
         ret.put("type", "function");
 
         JSONObject function = new JSONObject();
-        function.put("name", String.format("%s_%s_RPCP", name(), PLUGIN.getMetadata().getName()).replaceAll(" ", "_"));
+        function.put("name", String.format("%s_%s_%s", name(), PLUGIN.getMetadata().getName(), RPCP_SOURCE).replaceAll(" ", "_"));
         if(description() != null) {
             function.put("description", description());
         }

Plugin-API/src/main/java/me/neurodock/plugin/tool/ToolArguments.java

@@ -1,4 +1,30 @@
 package me.neurodock.plugin.tool;
 
+import java.util.HashMap;
+import java.util.Map;
+import java.util.NoSuchElementException;
+
 public class ToolArguments {
+    Map<String, Object> arguments = new HashMap<>();
+
+    public void addArguments(Map<String, Object> args)
+    {
+        arguments.putAll(args);
+    }
+
+    public void addArgument(String name, Object value)
+    {
+        arguments.put(name, value);
+    }
+
+    public Object getArgument(String name)
+    {
+        if(!arguments.containsKey(name)) throw new NoSuchElementException("Trying to access missing argument");
+        return arguments.get(name);
+    }
+
+    public boolean hasArgument(String name)
+    {
+        return arguments.containsKey(name);
+    }
 }

Plugin-API/src/main/java/me/neurodock/plugin/tool/ToolResponse.java

@@ -1,12 +1,14 @@
 package me.neurodock.plugin.tool;
 
-public class ToolResponse {
+public record ToolResponse(String name, String response) {
     public static ToolResponse empty(Tool tool) {
-        return new ToolResponse();
+        return new ToolResponse(tool.name(), "");
     }
 
     public static ToolResponse empty(String toolName)
     {
-        return new ToolResponse();
+        return new ToolResponse(toolName, "");
     }
+
+
 }

launcher/build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'java'
+    id 'application'
 }
 
 version = '1.0-SNAPSHOT'
@@ -11,10 +12,14 @@ dependencies {
 
 jar{
     manifest {
-        attributes 'Main-Class': 'me.zacharias.chat.launcher.Launcher'
+        attributes 'Main-Class': 'me.neurodock.launcher.Launcher'
     }
 }
 
+application {
+    mainClass = 'me.neurodock.launcher.Launcher'
+}
+
 java {
     toolchain {
         languageVersion.set(JavaLanguageVersion.of(javaVersion)) // Set Java version