feat: Add skills feature for tool and chat calling (#351)

sources/skills/SkillsManager.hpp

@@ -0,0 +1,59 @@
+// Copyright (C) 2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <optional>
+
+#include <QObject>
+#include <QString>
+#include <QStringList>
+#include <QVector>
+
+#include "AgentSkill.hpp"
+
+class QFileSystemWatcher;
+
+namespace QodeAssist::Skills {
+
+class SkillsManager : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit SkillsManager(QObject *parent = nullptr);
+
+    void configure(
+        const QString &projectPath,
+        const QStringList &globalRoots,
+        const QStringList &projectSubdirs);
+
+    void reload();
+
+    QVector<AgentSkill> skills() const;
+
+    std::optional<AgentSkill> findByName(const QString &name) const;
+
+    static QStringList resolveRoots(
+        const QString &projectPath,
+        const QStringList &globalRoots,
+        const QStringList &projectSubdirs);
+
+    QString catalogText() const;
+
+    QString alwaysOnBodies() const;
+
+signals:
+    void skillsChanged();
+
+private:
+    void updateWatcher(const QStringList &roots);
+
+    QString m_projectPath;
+    QStringList m_globalRoots;
+    QStringList m_projectSubdirs;
+    QVector<AgentSkill> m_skills;
+    QFileSystemWatcher *m_watcher = nullptr;
+};
+
+} // namespace QodeAssist::Skills