feat: Rename old llmcore module to pluginllmcore

pluginllmcore/BaseTool.cpp

@@ -0,0 +1,73 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "BaseTool.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+BaseTool::BaseTool(QObject *parent)
+    : QObject(parent)
+{}
+
+QJsonObject BaseTool::customizeForOpenAI(const QJsonObject &baseDefinition) const
+{
+    QJsonObject function;
+    function["name"] = name();
+    function["description"] = description();
+    function["parameters"] = baseDefinition;
+
+    QJsonObject tool;
+    tool["type"] = "function";
+    tool["function"] = function;
+
+    return tool;
+}
+
+QJsonObject BaseTool::customizeForClaude(const QJsonObject &baseDefinition) const
+{
+    QJsonObject tool;
+    tool["name"] = name();
+    tool["description"] = description();
+    tool["input_schema"] = baseDefinition;
+
+    return tool;
+}
+
+QJsonObject BaseTool::customizeForOllama(const QJsonObject &baseDefinition) const
+{
+    return customizeForOpenAI(baseDefinition);
+}
+
+QJsonObject BaseTool::customizeForGoogle(const QJsonObject &baseDefinition) const
+{
+    QJsonObject functionDeclaration;
+    functionDeclaration["name"] = name();
+    functionDeclaration["description"] = description();
+    functionDeclaration["parameters"] = baseDefinition;
+
+    QJsonArray functionDeclarations;
+    functionDeclarations.append(functionDeclaration);
+
+    QJsonObject tool;
+    tool["function_declarations"] = functionDeclarations;
+
+    return tool;
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/BaseTool.hpp

@@ -0,0 +1,70 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QFuture>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QObject>
+#include <QString>
+
+namespace QodeAssist::PluginLLMCore {
+
+enum class ToolSchemaFormat { OpenAI, Claude, Ollama, Google };
+
+enum ToolPermission {
+    None = 0,
+    FileSystemRead = 1 << 0,
+    FileSystemWrite = 1 << 1,
+    NetworkAccess = 1 << 2
+};
+Q_DECLARE_FLAGS(ToolPermissions, ToolPermission)
+Q_DECLARE_OPERATORS_FOR_FLAGS(ToolPermissions)
+
+enum class RunToolsFilter {
+    ALL,              // Run all tools (no filtering)
+    OnlyRead,         // Run only read tools (FileSystemRead + None)
+    OnlyWrite,        // Run only write tools (FileSystemWrite)
+    OnlyNetworking    // Run only network tools (NetworkAccess)
+};
+
+class BaseTool : public QObject
+{
+    Q_OBJECT
+public:
+    explicit BaseTool(QObject *parent = nullptr);
+    ~BaseTool() override = default;
+
+    virtual QString name() const = 0;
+    virtual QString stringName() const = 0;
+    virtual QString description() const = 0;
+    virtual QJsonObject getDefinition(ToolSchemaFormat format) const = 0;
+    virtual ToolPermissions requiredPermissions() const = 0;
+
+    virtual QFuture<QString> executeAsync(const QJsonObject &input = QJsonObject()) = 0;
+
+protected:
+    virtual QJsonObject customizeForOpenAI(const QJsonObject &baseDefinition) const;
+    virtual QJsonObject customizeForClaude(const QJsonObject &baseDefinition) const;
+    virtual QJsonObject customizeForOllama(const QJsonObject &baseDefinition) const;
+    virtual QJsonObject customizeForGoogle(const QJsonObject &baseDefinition) const;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/CMakeLists.txt

@@ -0,0 +1,35 @@
+add_library(PluginLLMCore STATIC
+    RequestType.hpp
+    Provider.hpp Provider.cpp
+    ProvidersManager.hpp ProvidersManager.cpp
+    ContextData.hpp
+    IPromptProvider.hpp
+    IProviderRegistry.hpp
+    PromptProviderChat.hpp
+    PromptProviderFim.hpp
+    PromptTemplate.hpp
+    PromptTemplateManager.hpp PromptTemplateManager.cpp
+    RequestConfig.hpp
+    ValidationUtils.hpp ValidationUtils.cpp
+    ProviderID.hpp
+    HttpClient.hpp HttpClient.cpp
+    DataBuffers.hpp
+    SSEBuffer.hpp SSEBuffer.cpp
+    BaseTool.hpp BaseTool.cpp
+    ContentBlocks.hpp
+    RulesLoader.hpp RulesLoader.cpp
+    ResponseCleaner.hpp
+)
+
+target_link_libraries(PluginLLMCore
+    PUBLIC
+    Qt::Core
+    Qt::Network
+    QtCreator::Core
+    QtCreator::Utils
+    QtCreator::ExtensionSystem
+    PRIVATE
+    QodeAssistLogger
+)
+
+target_include_directories(PluginLLMCore PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

pluginllmcore/ContentBlocks.hpp

@@ -0,0 +1,252 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QHash>
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QObject>
+#include <QString>
+
+namespace QodeAssist::PluginLLMCore {
+
+enum class MessageState { Building, Complete, RequiresToolExecution, Final };
+
+enum class ProviderFormat { Claude, OpenAI };
+
+class ContentBlock : public QObject
+{
+    Q_OBJECT
+public:
+    explicit ContentBlock(QObject *parent = nullptr)
+        : QObject(parent)
+    {}
+    virtual ~ContentBlock() = default;
+    virtual QString type() const = 0;
+    virtual QJsonValue toJson(ProviderFormat format) const = 0;
+};
+
+class TextContent : public ContentBlock
+{
+    Q_OBJECT
+public:
+    explicit TextContent(const QString &text = QString())
+        : ContentBlock()
+        , m_text(text)
+    {}
+
+    QString type() const override { return "text"; }
+    QString text() const { return m_text; }
+    void appendText(const QString &text) { m_text += text; }
+    void setText(const QString &text) { m_text = text; }
+
+    QJsonValue toJson(ProviderFormat format) const override
+    {
+        Q_UNUSED(format);
+        return QJsonObject{{"type", "text"}, {"text", m_text}};
+    }
+
+private:
+    QString m_text;
+};
+
+class ImageContent : public ContentBlock
+{
+    Q_OBJECT
+public:
+    enum class ImageSourceType { Base64, Url };
+
+    ImageContent(const QString &data, const QString &mediaType, ImageSourceType sourceType = ImageSourceType::Base64)
+        : ContentBlock()
+        , m_data(data)
+        , m_mediaType(mediaType)
+        , m_sourceType(sourceType)
+    {}
+
+    QString type() const override { return "image"; }
+    QString data() const { return m_data; }
+    QString mediaType() const { return m_mediaType; }
+    ImageSourceType sourceType() const { return m_sourceType; }
+
+    QJsonValue toJson(ProviderFormat format) const override
+    {
+        if (format == ProviderFormat::Claude) {
+            QJsonObject source;
+            if (m_sourceType == ImageSourceType::Base64) {
+                source["type"] = "base64";
+                source["media_type"] = m_mediaType;
+                source["data"] = m_data;
+            } else {
+                source["type"] = "url";
+                source["url"] = m_data;
+            }
+            return QJsonObject{{"type", "image"}, {"source", source}};
+        } else { // OpenAI format
+            QJsonObject imageUrl;
+            if (m_sourceType == ImageSourceType::Base64) {
+                imageUrl["url"] = QString("data:%1;base64,%2").arg(m_mediaType, m_data);
+            } else {
+                imageUrl["url"] = m_data;
+            }
+            return QJsonObject{{"type", "image_url"}, {"image_url", imageUrl}};
+        }
+    }
+
+private:
+    QString m_data;
+    QString m_mediaType;
+    ImageSourceType m_sourceType;
+};
+
+class ToolUseContent : public ContentBlock
+{
+    Q_OBJECT
+public:
+    ToolUseContent(const QString &id, const QString &name, const QJsonObject &input = QJsonObject())
+        : ContentBlock()
+        , m_id(id)
+        , m_name(name)
+        , m_input(input)
+    {}
+
+    QString type() const override { return "tool_use"; }
+    QString id() const { return m_id; }
+    QString name() const { return m_name; }
+    QJsonObject input() const { return m_input; }
+    void setInput(const QJsonObject &input) { m_input = input; }
+
+    QJsonValue toJson(ProviderFormat format) const override
+    {
+        if (format == ProviderFormat::Claude) {
+            return QJsonObject{
+                {"type", "tool_use"}, {"id", m_id}, {"name", m_name}, {"input", m_input}};
+        } else { // OpenAI
+            QJsonDocument doc(m_input);
+            return QJsonObject{
+                {"id", m_id},
+                {"type", "function"},
+                {"function",
+                 QJsonObject{
+                     {"name", m_name},
+                     {"arguments", QString::fromUtf8(doc.toJson(QJsonDocument::Compact))}}}};
+        }
+    }
+
+private:
+    QString m_id;
+    QString m_name;
+    QJsonObject m_input;
+};
+
+class ToolResultContent : public ContentBlock
+{
+    Q_OBJECT
+public:
+    ToolResultContent(const QString &toolUseId, const QString &result)
+        : ContentBlock()
+        , m_toolUseId(toolUseId)
+        , m_result(result)
+    {}
+
+    QString type() const override { return "tool_result"; }
+    QString toolUseId() const { return m_toolUseId; }
+    QString result() const { return m_result; }
+
+    QJsonValue toJson(ProviderFormat format) const override
+    {
+        if (format == ProviderFormat::Claude) {
+            return QJsonObject{
+                {"type", "tool_result"}, {"tool_use_id", m_toolUseId}, {"content", m_result}};
+        } else { // OpenAI
+            return QJsonObject{{"role", "tool"}, {"tool_call_id", m_toolUseId}, {"content", m_result}};
+        }
+    }
+
+private:
+    QString m_toolUseId;
+    QString m_result;
+};
+
+class ThinkingContent : public ContentBlock
+{
+    Q_OBJECT
+public:
+    explicit ThinkingContent(const QString &thinking = QString(), const QString &signature = QString())
+        : ContentBlock()
+        , m_thinking(thinking)
+        , m_signature(signature)
+    {}
+
+    QString type() const override { return "thinking"; }
+    QString thinking() const { return m_thinking; }
+    QString signature() const { return m_signature; }
+    void appendThinking(const QString &text) { m_thinking += text; }
+    void setThinking(const QString &text) { m_thinking = text; }
+    void setSignature(const QString &signature) { m_signature = signature; }
+
+    QJsonValue toJson(ProviderFormat format) const override
+    {
+        Q_UNUSED(format);
+        // Only include signature field if it's not empty
+        // Empty signature is rejected by API with "Invalid signature" error
+        // In streaming mode, signature is not provided, so we omit the field entirely
+        QJsonObject obj{{"type", "thinking"}, {"thinking", m_thinking}};
+        if (!m_signature.isEmpty()) {
+            obj["signature"] = m_signature;
+        }
+        return obj;
+    }
+
+private:
+    QString m_thinking;
+    QString m_signature;
+};
+
+class RedactedThinkingContent : public ContentBlock
+{
+    Q_OBJECT
+public:
+    explicit RedactedThinkingContent(const QString &signature = QString())
+        : ContentBlock()
+        , m_signature(signature)
+    {}
+
+    QString type() const override { return "redacted_thinking"; }
+    QString signature() const { return m_signature; }
+    void setSignature(const QString &signature) { m_signature = signature; }
+
+    QJsonValue toJson(ProviderFormat format) const override
+    {
+        Q_UNUSED(format);
+        // Only include signature field if it's not empty
+        // Empty signature is rejected by API with "Invalid signature" error
+        QJsonObject obj{{"type", "redacted_thinking"}};
+        if (!m_signature.isEmpty()) {
+            obj["signature"] = m_signature;
+        }
+        return obj;
+    }
+
+private:
+    QString m_signature;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/ContextData.hpp

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+#include <QVector>
+
+namespace QodeAssist::PluginLLMCore {
+
+struct ImageAttachment
+{
+    QString data;        // Base64 encoded data or URL
+    QString mediaType;   // e.g., "image/png", "image/jpeg", "image/webp", "image/gif"
+    bool isUrl = false;  // true if data is URL, false if base64
+
+    bool operator==(const ImageAttachment &) const = default;
+};
+
+struct Message
+{
+    QString role;
+    QString content;
+    QString signature;
+    bool isThinking = false;
+    bool isRedacted = false;
+    std::optional<QVector<ImageAttachment>> images;
+
+    // clang-format off
+    bool operator==(const Message&) const = default;
+    // clang-format on
+};
+
+struct FileMetadata
+{
+    QString filePath;
+    QString content;
+    bool operator==(const FileMetadata &) const = default;
+};
+
+struct ContextData
+{
+    std::optional<QString> systemPrompt;
+    std::optional<QString> prefix;
+    std::optional<QString> suffix;
+    std::optional<QString> fileContext;
+    std::optional<QVector<Message>> history;
+    std::optional<QList<FileMetadata>> filesMetadata;
+
+    bool operator==(const ContextData &) const = default;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/DataBuffers.hpp

@@ -0,0 +1,39 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "SSEBuffer.hpp"
+#include <QString>
+
+namespace QodeAssist::PluginLLMCore {
+
+struct DataBuffers
+{
+    SSEBuffer rawStreamBuffer;
+    QString responseContent;
+
+    void clear()
+    {
+        rawStreamBuffer.clear();
+        responseContent.clear();
+    }
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/HttpClient.cpp

@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "HttpClient.hpp"
+
+#include <QJsonDocument>
+#include <QMutexLocker>
+
+#include <Logger.hpp>
+
+namespace QodeAssist::PluginLLMCore {
+
+HttpClient::HttpClient(QObject *parent)
+    : QObject(parent)
+    , m_manager(new QNetworkAccessManager(this))
+{}
+
+HttpClient::~HttpClient()
+{
+    QMutexLocker locker(&m_mutex);
+    for (auto *reply : std::as_const(m_activeRequests)) {
+        reply->abort();
+        reply->deleteLater();
+    }
+    m_activeRequests.clear();
+}
+
+QFuture<QByteArray> HttpClient::get(const QNetworkRequest &request)
+{
+    LOG_MESSAGE(QString("HttpClient: GET %1").arg(request.url().toString()));
+
+    auto promise = std::make_shared<QPromise<QByteArray>>();
+    promise->start();
+
+    QNetworkReply *reply = m_manager->get(request);
+    setupNonStreamingReply(reply, promise);
+
+    return promise->future();
+}
+
+QFuture<QByteArray> HttpClient::post(const QNetworkRequest &request, const QJsonObject &payload)
+{
+    QJsonDocument doc(payload);
+    LOG_MESSAGE(QString("HttpClient: POST %1, data: %2")
+                    .arg(request.url().toString(), doc.toJson(QJsonDocument::Indented)));
+
+    auto promise = std::make_shared<QPromise<QByteArray>>();
+    promise->start();
+
+    QNetworkReply *reply = m_manager->post(request, doc.toJson(QJsonDocument::Compact));
+    setupNonStreamingReply(reply, promise);
+
+    return promise->future();
+}
+
+QFuture<QByteArray> HttpClient::del(const QNetworkRequest &request,
+                                    std::optional<QJsonObject> payload)
+{
+    auto promise = std::make_shared<QPromise<QByteArray>>();
+    promise->start();
+
+    QNetworkReply *reply;
+    if (payload) {
+        QJsonDocument doc(*payload);
+        LOG_MESSAGE(QString("HttpClient: DELETE %1, data: %2")
+                        .arg(request.url().toString(), doc.toJson(QJsonDocument::Indented)));
+        reply = m_manager->sendCustomRequest(request, "DELETE", doc.toJson(QJsonDocument::Compact));
+    } else {
+        LOG_MESSAGE(QString("HttpClient: DELETE %1").arg(request.url().toString()));
+        reply = m_manager->deleteResource(request);
+    }
+
+    setupNonStreamingReply(reply, promise);
+
+    return promise->future();
+}
+
+void HttpClient::setupNonStreamingReply(QNetworkReply *reply,
+                                        std::shared_ptr<QPromise<QByteArray>> promise)
+{
+    connect(reply, &QNetworkReply::finished, this, [this, reply, promise]() {
+        int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+        QByteArray responseBody = reply->readAll();
+        QNetworkReply::NetworkError networkError = reply->error();
+        QString networkErrorString = reply->errorString();
+
+        reply->disconnect();
+        reply->deleteLater();
+
+        LOG_MESSAGE(
+            QString("HttpClient: Non-streaming request - HTTP Status: %1").arg(statusCode));
+
+        bool hasError = (networkError != QNetworkReply::NoError) || (statusCode >= 400);
+        if (hasError) {
+            QString errorMsg = parseErrorFromResponse(statusCode, responseBody, networkErrorString);
+            LOG_MESSAGE(QString("HttpClient: Non-streaming request - Error: %1").arg(errorMsg));
+            promise->setException(
+                std::make_exception_ptr(std::runtime_error(errorMsg.toStdString())));
+        } else {
+            promise->addResult(responseBody);
+        }
+        promise->finish();
+    });
+}
+
+void HttpClient::postStreaming(const QString &requestId, const QNetworkRequest &request,
+                               const QJsonObject &payload)
+{
+    QJsonDocument doc(payload);
+    LOG_MESSAGE(QString("HttpClient: POST streaming %1, data: %2")
+                    .arg(request.url().toString(), doc.toJson(QJsonDocument::Indented)));
+
+    QNetworkReply *reply = m_manager->post(request, doc.toJson(QJsonDocument::Compact));
+    addActiveRequest(reply, requestId);
+
+    connect(reply, &QNetworkReply::readyRead, this, &HttpClient::onReadyRead);
+    connect(reply, &QNetworkReply::finished, this, &HttpClient::onStreamingFinished);
+}
+
+void HttpClient::cancelRequest(const QString &requestId)
+{
+    QMutexLocker locker(&m_mutex);
+    auto it = m_activeRequests.find(requestId);
+    if (it != m_activeRequests.end()) {
+        QNetworkReply *reply = it.value();
+        if (reply) {
+            reply->disconnect();
+            reply->abort();
+            reply->deleteLater();
+        }
+        m_activeRequests.erase(it);
+        LOG_MESSAGE(QString("HttpClient: Cancelled request: %1").arg(requestId));
+    }
+}
+
+void HttpClient::onReadyRead()
+{
+    QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
+    if (!reply || reply->isFinished())
+        return;
+
+    int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+    if (statusCode >= 400)
+        return;
+
+    QString requestId = findRequestId(reply);
+    if (requestId.isEmpty())
+        return;
+
+    QByteArray data = reply->readAll();
+    if (!data.isEmpty()) {
+        emit dataReceived(requestId, data);
+    }
+}
+
+void HttpClient::onStreamingFinished()
+{
+    QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
+    if (!reply)
+        return;
+
+    int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+    QByteArray responseBody = reply->readAll();
+    QNetworkReply::NetworkError networkError = reply->error();
+    QString networkErrorString = reply->errorString();
+
+    reply->disconnect();
+
+    QString requestId;
+    std::optional<QString> error;
+
+    {
+        QMutexLocker locker(&m_mutex);
+        for (auto it = m_activeRequests.begin(); it != m_activeRequests.end(); ++it) {
+            if (it.value() == reply) {
+                requestId = it.key();
+                m_activeRequests.erase(it);
+                break;
+            }
+        }
+
+        if (requestId.isEmpty()) {
+            reply->deleteLater();
+            return;
+        }
+
+        bool hasError = (networkError != QNetworkReply::NoError) || (statusCode >= 400);
+        if (hasError) {
+            error = parseErrorFromResponse(statusCode, responseBody, networkErrorString);
+        }
+
+        LOG_MESSAGE(
+            QString("HttpClient: Request %1 - HTTP Status: %2").arg(requestId).arg(statusCode));
+
+        if (!responseBody.isEmpty()) {
+            LOG_MESSAGE(QString("HttpClient: Request %1 - Response body (%2 bytes): %3")
+                            .arg(requestId)
+                            .arg(responseBody.size())
+                            .arg(QString::fromUtf8(responseBody)));
+        }
+
+        if (error) {
+            LOG_MESSAGE(QString("HttpClient: Request %1 - Error: %2").arg(requestId, *error));
+        }
+    }
+
+    reply->deleteLater();
+
+    if (!requestId.isEmpty()) {
+        emit requestFinished(requestId, error);
+    }
+}
+
+QString HttpClient::findRequestId(QNetworkReply *reply)
+{
+    QMutexLocker locker(&m_mutex);
+    for (auto it = m_activeRequests.begin(); it != m_activeRequests.end(); ++it) {
+        if (it.value() == reply)
+            return it.key();
+    }
+    return {};
+}
+
+void HttpClient::addActiveRequest(QNetworkReply *reply, const QString &requestId)
+{
+    QMutexLocker locker(&m_mutex);
+    m_activeRequests[requestId] = reply;
+    LOG_MESSAGE(QString("HttpClient: Added active request: %1").arg(requestId));
+}
+
+QString HttpClient::parseErrorFromResponse(
+    int statusCode, const QByteArray &responseBody, const QString &networkErrorString)
+{
+    if (!responseBody.isEmpty()) {
+        QJsonDocument errorDoc = QJsonDocument::fromJson(responseBody);
+        if (!errorDoc.isNull() && errorDoc.isObject()) {
+            QJsonObject errorObj = errorDoc.object();
+            if (errorObj.contains("error")) {
+                QJsonObject error = errorObj["error"].toObject();
+                QString message = error["message"].toString();
+                QString type = error["type"].toString();
+                QString code = error["code"].toString();
+
+                QString errorMsg = QString("HTTP %1: %2").arg(statusCode).arg(message);
+                if (!type.isEmpty())
+                    errorMsg += QString(" (type: %1)").arg(type);
+                if (!code.isEmpty())
+                    errorMsg += QString(" (code: %1)").arg(code);
+                return errorMsg;
+            }
+            return QString("HTTP %1: %2")
+                .arg(statusCode)
+                .arg(QString::fromUtf8(responseBody));
+        }
+        return QString("HTTP %1: %2").arg(statusCode).arg(QString::fromUtf8(responseBody));
+    }
+    return QString("HTTP %1: %2").arg(statusCode).arg(networkErrorString);
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/HttpClient.hpp

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <optional>
+
+#include <QFuture>
+#include <QHash>
+#include <QJsonObject>
+#include <QMutex>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+#include <QObject>
+#include <QPromise>
+
+namespace QodeAssist::PluginLLMCore {
+
+class HttpClient : public QObject
+{
+    Q_OBJECT
+
+public:
+    HttpClient(QObject *parent = nullptr);
+    ~HttpClient();
+
+    // Non-streaming — return QFuture with full response
+    QFuture<QByteArray> get(const QNetworkRequest &request);
+    QFuture<QByteArray> post(const QNetworkRequest &request, const QJsonObject &payload);
+    QFuture<QByteArray> del(const QNetworkRequest &request,
+                            std::optional<QJsonObject> payload = std::nullopt);
+
+    // Streaming — signal-based with requestId
+    void postStreaming(const QString &requestId, const QNetworkRequest &request,
+                       const QJsonObject &payload);
+
+    void cancelRequest(const QString &requestId);
+
+signals:
+    void dataReceived(const QString &requestId, const QByteArray &data);
+    void requestFinished(const QString &requestId, std::optional<QString> error);
+
+private slots:
+    void onReadyRead();
+    void onStreamingFinished();
+
+private:
+    void setupNonStreamingReply(QNetworkReply *reply, std::shared_ptr<QPromise<QByteArray>> promise);
+
+    QString findRequestId(QNetworkReply *reply);
+    void addActiveRequest(QNetworkReply *reply, const QString &requestId);
+    QString parseErrorFromResponse(int statusCode, const QByteArray &responseBody,
+                                   const QString &networkErrorString);
+
+    QNetworkAccessManager *m_manager;
+    QHash<QString, QNetworkReply *> m_activeRequests;
+    mutable QMutex m_mutex;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/IPromptProvider.hpp

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "PromptTemplate.hpp"
+#include <QString>
+
+namespace QodeAssist::PluginLLMCore {
+
+class IPromptProvider
+{
+public:
+    virtual ~IPromptProvider() = default;
+
+    virtual PromptTemplate *getTemplateByName(const QString &templateName) const = 0;
+
+    virtual QStringList templatesNames() const = 0;
+
+    virtual QStringList getTemplatesForProvider(ProviderID id) const = 0;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/IProviderRegistry.hpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "Provider.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+class IProviderRegistry
+{
+public:
+    virtual ~IProviderRegistry() = default;
+
+    virtual Provider *getProviderByName(const QString &providerName) = 0;
+
+    virtual QStringList providersNames() const = 0;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/IToolsManager.hpp

@@ -0,0 +1,51 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QHash>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QString>
+
+#include "BaseTool.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+class IToolsManager
+{
+public:
+    virtual ~IToolsManager() = default;
+
+    virtual void executeToolCall(
+        const QString &requestId,
+        const QString &toolId,
+        const QString &toolName,
+        const QJsonObject &input) = 0;
+
+    virtual QJsonArray getToolsDefinitions(
+        ToolSchemaFormat format,
+        RunToolsFilter filter = RunToolsFilter::ALL) const = 0;
+
+    virtual void cleanupRequest(const QString &requestId) = 0;
+    virtual void setCurrentSessionId(const QString &sessionId) = 0;
+    virtual void clearTodoSession(const QString &sessionId) = 0;
+};
+
+} // namespace QodeAssist::LLMCore

pluginllmcore/PromptProviderChat.hpp

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "IPromptProvider.hpp"
+#include "PromptTemplate.hpp"
+#include "PromptTemplateManager.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+class PromptProviderChat : public IPromptProvider
+{
+public:
+    explicit PromptProviderChat(PromptTemplateManager &templateManager)
+        : m_templateManager(templateManager)
+    {}
+
+    ~PromptProviderChat() = default;
+
+    PromptTemplate *getTemplateByName(const QString &templateName) const override
+    {
+        return m_templateManager.getChatTemplateByName(templateName);
+    }
+
+    QStringList templatesNames() const override { return m_templateManager.chatTemplatesNames(); }
+
+    QStringList getTemplatesForProvider(ProviderID id) const override
+    {
+        return m_templateManager.getChatTemplatesForProvider(id);
+    }
+
+private:
+    PromptTemplateManager &m_templateManager;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/PromptProviderFim.hpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "IPromptProvider.hpp"
+#include "PromptTemplateManager.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+class PromptProviderFim : public IPromptProvider
+{
+public:
+    explicit PromptProviderFim(PromptTemplateManager &templateManager)
+        : m_templateManager(templateManager)
+    {}
+
+    ~PromptProviderFim() = default;
+
+    PromptTemplate *getTemplateByName(const QString &templateName) const override
+    {
+        return m_templateManager.getFimTemplateByName(templateName);
+    }
+
+    QStringList templatesNames() const override { return m_templateManager.fimTemplatesNames(); }
+
+    QStringList getTemplatesForProvider(ProviderID id) const override
+    {
+        return m_templateManager.getFimTemplatesForProvider(id);
+    }
+
+private:
+    PromptTemplateManager &m_templateManager;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/PromptTemplate.hpp

@@ -0,0 +1,44 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QJsonObject>
+#include <QList>
+#include <QString>
+
+#include "ContextData.hpp"
+#include "ProviderID.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+enum class TemplateType { Chat, FIM, FIMOnChat };
+
+class PromptTemplate
+{
+public:
+    virtual ~PromptTemplate() = default;
+    virtual TemplateType type() const = 0;
+    virtual QString name() const = 0;
+    virtual QStringList stopWords() const = 0;
+    virtual void prepareRequest(QJsonObject &request, const ContextData &context) const = 0;
+    virtual QString description() const = 0;
+    virtual bool isSupportProvider(ProviderID id) const = 0;
+};
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/PromptTemplateManager.cpp

@@ -0,0 +1,99 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "PromptTemplateManager.hpp"
+
+#include <QMessageBox>
+
+namespace QodeAssist::PluginLLMCore {
+
+PromptTemplateManager &PromptTemplateManager::instance()
+{
+    static PromptTemplateManager instance;
+    return instance;
+}
+
+QStringList PromptTemplateManager::fimTemplatesNames() const
+{
+    return m_fimTemplates.keys();
+}
+
+QStringList PromptTemplateManager::chatTemplatesNames() const
+{
+    return m_chatTemplates.keys();
+}
+
+QStringList PromptTemplateManager::getFimTemplatesForProvider(ProviderID id)
+{
+    QStringList templateList;
+
+    for (const auto tmpl : m_fimTemplates) {
+        if (tmpl->isSupportProvider(id)) {
+            templateList.append(tmpl->name());
+        }
+    }
+
+    return templateList;
+}
+
+QStringList PromptTemplateManager::getChatTemplatesForProvider(ProviderID id)
+{
+    QStringList templateList;
+
+    for (const auto tmpl : m_chatTemplates) {
+        if (tmpl->isSupportProvider(id)) {
+            templateList.append(tmpl->name());
+        }
+    }
+
+    return templateList;
+}
+
+PromptTemplateManager::~PromptTemplateManager()
+{
+    qDeleteAll(m_fimTemplates);
+}
+
+PromptTemplate *PromptTemplateManager::getFimTemplateByName(const QString &templateName)
+{
+    if (!m_fimTemplates.contains(templateName)) {
+        QMessageBox::warning(
+            nullptr,
+            QObject::tr("Template Not Found"),
+            QObject::tr("Template '%1' was not found or has been updated. Please re-set new one.")
+                .arg(templateName));
+        return m_fimTemplates.first();
+    }
+    return m_fimTemplates[templateName];
+}
+
+PromptTemplate *PromptTemplateManager::getChatTemplateByName(const QString &templateName)
+{
+    if (!m_chatTemplates.contains(templateName)) {
+        QMessageBox::warning(
+            nullptr,
+            QObject::tr("Template Not Found"),
+            QObject::tr("Template '%1' was not found or has been updated. Please re-set new one.")
+                .arg(templateName));
+        return m_chatTemplates.first();
+    }
+    return m_chatTemplates[templateName];
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/PromptTemplateManager.hpp

@@ -0,0 +1,65 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QMap>
+#include <QString>
+
+#include "PromptTemplate.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+class PromptTemplateManager
+{
+public:
+    static PromptTemplateManager &instance();
+    ~PromptTemplateManager();
+
+    template<typename T>
+    void registerTemplate()
+    {
+        static_assert(std::is_base_of<PromptTemplate, T>::value, "T must inherit from PromptTemplate");
+        T *template_ptr = new T();
+        QString name = template_ptr->name();
+        m_fimTemplates[name] = template_ptr;
+        if (template_ptr->type() == TemplateType::Chat) {
+            m_chatTemplates[name] = template_ptr;
+        }
+    }
+
+    PromptTemplate *getFimTemplateByName(const QString &templateName);
+    PromptTemplate *getChatTemplateByName(const QString &templateName);
+
+    QStringList fimTemplatesNames() const;
+    QStringList chatTemplatesNames() const;
+
+    QStringList getFimTemplatesForProvider(ProviderID id);
+    QStringList getChatTemplatesForProvider(ProviderID id);
+
+private:
+    PromptTemplateManager() = default;
+    PromptTemplateManager(const PromptTemplateManager &) = delete;
+    PromptTemplateManager &operator=(const PromptTemplateManager &) = delete;
+
+    QMap<QString, PromptTemplate *> m_fimTemplates;
+    QMap<QString, PromptTemplate *> m_chatTemplates;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/Provider.cpp

@@ -0,0 +1,36 @@
+#include "Provider.hpp"
+
+#include <QJsonDocument>
+
+namespace QodeAssist::PluginLLMCore {
+
+Provider::Provider(QObject *parent)
+    : QObject(parent)
+    , m_httpClient(new HttpClient(this))
+{
+    connect(m_httpClient, &HttpClient::dataReceived, this, &Provider::onDataReceived);
+    connect(m_httpClient, &HttpClient::requestFinished, this, &Provider::onRequestFinished);
+}
+
+void Provider::cancelRequest(const RequestID &requestId)
+{
+    m_httpClient->cancelRequest(requestId);
+}
+
+HttpClient *Provider::httpClient() const
+{
+    return m_httpClient;
+}
+
+QJsonObject Provider::parseEventLine(const QString &line)
+{
+    if (!line.startsWith("data: "))
+        return QJsonObject();
+
+    QString jsonStr = line.mid(6);
+
+    QJsonDocument doc = QJsonDocument::fromJson(jsonStr.toUtf8());
+    return doc.object();
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/Provider.hpp

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <optional>
+
+#include <QFuture>
+#include <utils/environment.h>
+#include <QNetworkRequest>
+#include <QObject>
+#include <QString>
+
+#include "ContextData.hpp"
+#include "DataBuffers.hpp"
+#include "HttpClient.hpp"
+#include "IToolsManager.hpp"
+#include "PromptTemplate.hpp"
+#include "RequestType.hpp"
+
+class QNetworkReply;
+class QJsonObject;
+
+namespace QodeAssist::PluginLLMCore {
+
+class Provider : public QObject
+{
+    Q_OBJECT
+public:
+    explicit Provider(QObject *parent = nullptr);
+
+    virtual ~Provider() = default;
+
+    virtual QString name() const = 0;
+    virtual QString url() const = 0;
+    virtual QString completionEndpoint() const = 0;
+    virtual QString chatEndpoint() const = 0;
+    virtual bool supportsModelListing() const = 0;
+    virtual void prepareRequest(
+        QJsonObject &request,
+        PluginLLMCore::PromptTemplate *prompt,
+        PluginLLMCore::ContextData context,
+        PluginLLMCore::RequestType type,
+        bool isToolsEnabled,
+        bool isThinkingEnabled)
+        = 0;
+    virtual QFuture<QList<QString>> getInstalledModels(const QString &url) = 0;
+    virtual QList<QString> validateRequest(const QJsonObject &request, TemplateType type) = 0;
+    virtual QString apiKey() const = 0;
+    virtual void prepareNetworkRequest(QNetworkRequest &networkRequest) const = 0;
+    virtual ProviderID providerID() const = 0;
+
+    virtual void sendRequest(const RequestID &requestId, const QUrl &url, const QJsonObject &payload)
+        = 0;
+
+    virtual bool supportsTools() const { return false; };
+    virtual bool supportThinking() const { return false; };
+    virtual bool supportImage() const { return false; };
+
+    virtual void cancelRequest(const RequestID &requestId);
+
+    virtual IToolsManager *toolsManager() const { return nullptr; }
+
+    HttpClient *httpClient() const;
+
+public slots:
+    virtual void onDataReceived(
+        const QodeAssist::PluginLLMCore::RequestID &requestId, const QByteArray &data)
+        = 0;
+    virtual void onRequestFinished(
+        const QodeAssist::PluginLLMCore::RequestID &requestId, std::optional<QString> error)
+        = 0;
+
+signals:
+    void partialResponseReceived(
+        const QodeAssist::PluginLLMCore::RequestID &requestId, const QString &partialText);
+    void fullResponseReceived(
+        const QodeAssist::PluginLLMCore::RequestID &requestId, const QString &fullText);
+    void requestFailed(const QodeAssist::PluginLLMCore::RequestID &requestId, const QString &error);
+    void toolExecutionStarted(
+        const QString &requestId, const QString &toolId, const QString &toolName);
+    void toolExecutionCompleted(
+        const QString &requestId,
+        const QString &toolId,
+        const QString &toolName,
+        const QString &result);
+    void continuationStarted(const QodeAssist::PluginLLMCore::RequestID &requestId);
+    void thinkingBlockReceived(
+        const QString &requestId, const QString &thinking, const QString &signature);
+    void redactedThinkingBlockReceived(const QString &requestId, const QString &signature);
+
+protected:
+    QJsonObject parseEventLine(const QString &line);
+
+    QHash<RequestID, DataBuffers> m_dataBuffers;
+    QHash<RequestID, QUrl> m_requestUrls;
+
+private:
+    HttpClient *m_httpClient;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/ProviderID.hpp

@@ -0,0 +1,35 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace QodeAssist::PluginLLMCore {
+
+enum class ProviderID {
+    Any,
+    Ollama,
+    LMStudio,
+    Claude,
+    OpenAI,
+    OpenAICompatible,
+    OpenAIResponses,
+    MistralAI,
+    OpenRouter,
+    GoogleAI,
+    LlamaCpp
+};
+}

pluginllmcore/ProvidersManager.cpp

@@ -0,0 +1,47 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "ProvidersManager.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+ProvidersManager &ProvidersManager::instance()
+{
+    static ProvidersManager instance;
+    return instance;
+}
+
+QStringList ProvidersManager::providersNames() const
+{
+    return m_providers.keys();
+}
+
+ProvidersManager::~ProvidersManager()
+{
+    qDeleteAll(m_providers);
+}
+
+Provider *ProvidersManager::getProviderByName(const QString &providerName)
+{
+    if (!m_providers.contains(providerName))
+        return m_providers.first();
+    return m_providers[providerName];
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/ProvidersManager.hpp

@@ -0,0 +1,56 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+
+#include "IProviderRegistry.hpp"
+#include <QMap>
+
+namespace QodeAssist::PluginLLMCore {
+
+class ProvidersManager : public IProviderRegistry
+{
+public:
+    static ProvidersManager &instance();
+    ~ProvidersManager();
+
+    template<typename T>
+    void registerProvider()
+    {
+        static_assert(std::is_base_of<Provider, T>::value, "T must inherit from Provider");
+        T *provider = new T();
+        QString name = provider->name();
+        m_providers[name] = provider;
+    }
+
+    Provider *getProviderByName(const QString &providerName) override;
+
+    QStringList providersNames() const override;
+
+private:
+    ProvidersManager() = default;
+    ProvidersManager(const ProvidersManager &) = delete;
+    ProvidersManager &operator=(const ProvidersManager &) = delete;
+
+    QMap<QString, Provider *> m_providers;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/RequestConfig.hpp

@@ -0,0 +1,41 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "PromptTemplate.hpp"
+#include "Provider.hpp"
+#include "RequestType.hpp"
+#include <QJsonObject>
+#include <QUrl>
+
+namespace QodeAssist::PluginLLMCore {
+
+struct LLMConfig
+{
+    QUrl url;
+    Provider *provider;
+    PromptTemplate *promptTemplate;
+    QJsonObject providerRequest;
+    RequestType requestType;
+    bool multiLineCompletion;
+    QString apiKey;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/RequestHandlerBase.cpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "RequestHandlerBase.hpp"
+
+namespace QodeAssist::LLMCore {
+
+RequestHandlerBase::RequestHandlerBase(QObject *parent)
+    : QObject(parent)
+{}
+
+RequestHandlerBase::~RequestHandlerBase() = default;
+
+} // namespace QodeAssist::LLMCore

pluginllmcore/RequestHandlerBase.hpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "RequestConfig.hpp"
+#include <QJsonObject>
+#include <QObject>
+
+namespace QodeAssist::LLMCore {
+
+class RequestHandlerBase : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit RequestHandlerBase(QObject *parent = nullptr);
+    ~RequestHandlerBase() override;
+
+    virtual void sendLLMRequest(const LLMConfig &config, const QJsonObject &request) = 0;
+    virtual bool cancelRequest(const QString &id) = 0;
+
+signals:
+    void completionReceived(const QString &completion, const QJsonObject &request, bool isComplete);
+    void requestFinished(const QString &requestId, bool success, const QString &errorString);
+    void requestCancelled(const QString &id);
+};
+
+} // namespace QodeAssist::LLMCore

pluginllmcore/RequestType.hpp

@@ -0,0 +1,29 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QString>
+
+#pragma once
+
+namespace QodeAssist::PluginLLMCore {
+
+enum RequestType { CodeCompletion, Chat, Embedding, QuickRefactoring };
+
+using RequestID = QString;
+}

pluginllmcore/ResponseCleaner.hpp

@@ -0,0 +1,119 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+#include <QStringList>
+#include <QRegularExpression>
+
+namespace QodeAssist::PluginLLMCore {
+
+class ResponseCleaner
+{
+public:
+    static QString clean(const QString &response)
+    {
+        QString cleaned = removeCodeBlocks(response);
+        cleaned = trimWhitespace(cleaned);
+        cleaned = removeExplanations(cleaned);
+        return cleaned;
+    }
+
+private:
+    static QString removeCodeBlocks(const QString &text)
+    {
+        if (!text.contains("```")) {
+            return text;
+        }
+
+        QRegularExpression codeBlockRegex("```\\w*\\n([\\s\\S]*?)```");
+        QRegularExpressionMatch match = codeBlockRegex.match(text);
+        if (match.hasMatch()) {
+            return match.captured(1);
+        }
+
+        int firstFence = text.indexOf("```");
+        int lastFence = text.lastIndexOf("```");
+        if (firstFence != -1 && lastFence > firstFence) {
+            int firstNewLine = text.indexOf('\n', firstFence);
+            if (firstNewLine != -1) {
+                return text.mid(firstNewLine + 1, lastFence - firstNewLine - 1);
+            }
+        }
+
+        return text;
+    }
+
+    static QString trimWhitespace(const QString &text)
+    {
+        QString result = text;
+        while (result.startsWith('\n') || result.startsWith('\r')) {
+            result = result.mid(1);
+        }
+        while (result.endsWith('\n') || result.endsWith('\r')) {
+            result.chop(1);
+        }
+        return result;
+    }
+
+    static QString removeExplanations(const QString &text)
+    {
+        static const QStringList explanationPrefixes = {
+            "here's the", "here is the", "here's", "here is",
+            "the refactored", "refactored code:", "code:",
+            "i've refactored", "i refactored", "i've changed", "i changed"
+        };
+
+        QStringList lines = text.split('\n');
+        int startLine = 0;
+
+        for (int i = 0; i < qMin(3, lines.size()); ++i) {
+            QString line = lines[i].trimmed().toLower();
+            bool isExplanation = false;
+
+            for (const QString &prefix : explanationPrefixes) {
+                if (line.startsWith(prefix) || line.contains(prefix + " code")) {
+                    isExplanation = true;
+                    break;
+                }
+            }
+
+            if (line.length() < 50 && line.endsWith(':')) {
+                isExplanation = true;
+            }
+
+            if (isExplanation) {
+                startLine = i + 1;
+            } else if (!line.isEmpty()) {
+                break;
+            }
+        }
+
+        if (startLine > 0 && startLine < lines.size()) {
+            lines = lines.mid(startLine);
+            return lines.join('\n');
+        }
+
+        return text;
+    }
+};
+
+} // namespace QodeAssist::PluginLLMCore
+

pluginllmcore/RulesLoader.cpp

@@ -0,0 +1,181 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "RulesLoader.hpp"
+
+#include <QDir>
+#include <QFile>
+
+#include <coreplugin/editormanager/editormanager.h>
+#include <projectexplorer/project.h>
+#include <projectexplorer/projectmanager.h>
+
+namespace QodeAssist::PluginLLMCore {
+
+QString RulesLoader::loadRules(const QString &projectPath, RulesContext context)
+{
+    if (projectPath.isEmpty()) {
+        return QString();
+    }
+
+    QString combined;
+    QString basePath = projectPath + "/.qodeassist/rules";
+
+    switch (context) {
+    case RulesContext::Completions:
+        combined += loadAllMarkdownFiles(basePath + "/completions");
+        break;
+    case RulesContext::Chat:
+        combined += loadAllMarkdownFiles(basePath + "/common");
+        combined += loadAllMarkdownFiles(basePath + "/chat");
+        break;
+    case RulesContext::QuickRefactor:
+        combined += loadAllMarkdownFiles(basePath + "/common");
+        combined += loadAllMarkdownFiles(basePath + "/quickrefactor");
+        break;
+    }
+
+    return combined;
+}
+
+QString RulesLoader::loadRulesForProject(ProjectExplorer::Project *project, RulesContext context)
+{
+    if (!project) {
+        return QString();
+    }
+
+    QString projectPath = getProjectPath(project);
+    return loadRules(projectPath, context);
+}
+
+ProjectExplorer::Project *RulesLoader::getActiveProject()
+{
+    auto currentEditor = Core::EditorManager::currentEditor();
+    if (currentEditor && currentEditor->document()) {
+        Utils::FilePath filePath = currentEditor->document()->filePath();
+        auto project = ProjectExplorer::ProjectManager::projectForFile(filePath);
+        if (project) {
+            return project;
+        }
+    }
+
+    return ProjectExplorer::ProjectManager::startupProject();
+}
+
+QString RulesLoader::loadAllMarkdownFiles(const QString &dirPath)
+{
+    QString combined;
+    QDir dir(dirPath);
+
+    if (!dir.exists()) {
+        return QString();
+    }
+
+    QStringList mdFiles = dir.entryList({"*.md"}, QDir::Files, QDir::Name);
+
+    for (const QString &fileName : mdFiles) {
+        QFile file(dir.filePath(fileName));
+        if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
+            combined += file.readAll();
+            combined += "\n\n";
+        }
+    }
+
+    return combined;
+}
+
+QString RulesLoader::getProjectPath(ProjectExplorer::Project *project)
+{
+    if (!project) {
+        return QString();
+    }
+
+    return project->projectDirectory().toUrlishString();
+}
+
+QVector<RuleFileInfo> RulesLoader::getRuleFiles(const QString &projectPath, RulesContext context)
+{
+    if (projectPath.isEmpty()) {
+        return QVector<RuleFileInfo>();
+    }
+
+    QVector<RuleFileInfo> result;
+    QString basePath = projectPath + "/.qodeassist/rules";
+
+    // Always include common rules
+    result.append(collectMarkdownFiles(basePath + "/common", "common"));
+
+    // Add context-specific rules
+    switch (context) {
+    case RulesContext::Completions:
+        result.append(collectMarkdownFiles(basePath + "/completions", "completions"));
+        break;
+    case RulesContext::Chat:
+        result.append(collectMarkdownFiles(basePath + "/chat", "chat"));
+        break;
+    case RulesContext::QuickRefactor:
+        result.append(collectMarkdownFiles(basePath + "/quickrefactor", "quickrefactor"));
+        break;
+    }
+
+    return result;
+}
+
+QVector<RuleFileInfo> RulesLoader::getRuleFilesForProject(
+    ProjectExplorer::Project *project, RulesContext context)
+{
+    if (!project) {
+        return QVector<RuleFileInfo>();
+    }
+
+    QString projectPath = getProjectPath(project);
+    return getRuleFiles(projectPath, context);
+}
+
+QString RulesLoader::loadRuleFileContent(const QString &filePath)
+{
+    QFile file(filePath);
+    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        return QString();
+    }
+
+    return file.readAll();
+}
+
+QVector<RuleFileInfo> RulesLoader::collectMarkdownFiles(
+    const QString &dirPath, const QString &category)
+{
+    QVector<RuleFileInfo> result;
+    QDir dir(dirPath);
+
+    if (!dir.exists()) {
+        return result;
+    }
+
+    QStringList mdFiles = dir.entryList({"*.md"}, QDir::Files, QDir::Name);
+
+    for (const QString &fileName : mdFiles) {
+        QString fullPath = dir.filePath(fileName);
+        result.append({fullPath, fileName, category});
+    }
+
+    return result;
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/RulesLoader.hpp

@@ -0,0 +1,57 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+
+namespace ProjectExplorer {
+class Project;
+}
+
+namespace QodeAssist::PluginLLMCore {
+
+enum class RulesContext { Completions, Chat, QuickRefactor };
+
+struct RuleFileInfo
+{
+    QString filePath;
+    QString fileName;
+    QString category; // "common", "chat", "completions", "quickrefactor"
+};
+
+class RulesLoader
+{
+public:
+    static QString loadRules(const QString &projectPath, RulesContext context);
+    static QString loadRulesForProject(ProjectExplorer::Project *project, RulesContext context);
+    static ProjectExplorer::Project *getActiveProject();
+    
+    // New methods for getting rule files info
+    static QVector<RuleFileInfo> getRuleFiles(const QString &projectPath, RulesContext context);
+    static QVector<RuleFileInfo> getRuleFilesForProject(ProjectExplorer::Project *project, RulesContext context);
+    static QString loadRuleFileContent(const QString &filePath);
+
+private:
+    static QString loadAllMarkdownFiles(const QString &dirPath);
+    static QVector<RuleFileInfo> collectMarkdownFiles(const QString &dirPath, const QString &category);
+    static QString getProjectPath(ProjectExplorer::Project *project);
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/SSEBuffer.cpp

@@ -0,0 +1,51 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "SSEBuffer.hpp"
+
+namespace QodeAssist::PluginLLMCore {
+
+QStringList SSEBuffer::processData(const QByteArray &data)
+{
+    m_buffer += QString::fromUtf8(data);
+
+    QStringList lines = m_buffer.split('\n');
+    m_buffer = lines.takeLast();
+
+    lines.removeAll(QString());
+
+    return lines;
+}
+
+void SSEBuffer::clear()
+{
+    m_buffer.clear();
+}
+
+QString SSEBuffer::currentBuffer() const
+{
+    return m_buffer;
+}
+
+bool SSEBuffer::hasIncompleteData() const
+{
+    return !m_buffer.isEmpty();
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/SSEBuffer.hpp

@@ -0,0 +1,42 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+#include <QStringList>
+
+namespace QodeAssist::PluginLLMCore {
+
+class SSEBuffer
+{
+public:
+    SSEBuffer() = default;
+
+    QStringList processData(const QByteArray &data);
+
+    void clear();
+    QString currentBuffer() const;
+    bool hasIncompleteData() const;
+
+private:
+    QString m_buffer;
+};
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/ValidationUtils.cpp

@@ -0,0 +1,57 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "ValidationUtils.hpp"
+
+#include <QJsonArray>
+
+namespace QodeAssist::PluginLLMCore {
+
+QStringList ValidationUtils::validateRequestFields(
+    const QJsonObject &request, const QJsonObject &templateObj)
+{
+    QStringList errors;
+    validateFields(request, templateObj, errors);
+    validateNestedObjects(request, templateObj, errors);
+    return errors;
+}
+
+void ValidationUtils::validateFields(
+    const QJsonObject &request, const QJsonObject &templateObj, QStringList &errors)
+{
+    for (auto it = request.begin(); it != request.end(); ++it) {
+        if (!templateObj.contains(it.key())) {
+            errors << QString("unknown field '%1'").arg(it.key());
+        }
+    }
+}
+
+void ValidationUtils::validateNestedObjects(
+    const QJsonObject &request, const QJsonObject &templateObj, QStringList &errors)
+{
+    for (auto it = request.begin(); it != request.end(); ++it) {
+        if (templateObj.contains(it.key()) && it.value().isObject()
+            && templateObj[it.key()].isObject()) {
+            validateFields(it.value().toObject(), templateObj[it.key()].toObject(), errors);
+            validateNestedObjects(it.value().toObject(), templateObj[it.key()].toObject(), errors);
+        }
+    }
+}
+
+} // namespace QodeAssist::PluginLLMCore

pluginllmcore/ValidationUtils.hpp

@@ -0,0 +1,41 @@
+/* 
+ * Copyright (C) 2024-2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QJsonObject>
+#include <QStringList>
+
+namespace QodeAssist::PluginLLMCore {
+
+class ValidationUtils
+{
+public:
+    static QStringList validateRequestFields(
+        const QJsonObject &request, const QJsonObject &templateObj);
+
+private:
+    static void validateFields(
+        const QJsonObject &request, const QJsonObject &templateObj, QStringList &errors);
+
+    static void validateNestedObjects(
+        const QJsonObject &request, const QJsonObject &templateObj, QStringList &errors);
+};
+
+} // namespace QodeAssist::PluginLLMCore