fix: truncate webfetch content to fit context

Plugins/ZShell/Llm/filetool.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "tool.hpp"
+
+namespace ZShell::llm {
+
+// Lets the model read text files from the local filesystem, in
+// byte-offset windows small enough to fit the context. Primarily used to
+// page through the full webfetch output stored under
+// /tmp/zshell-llm/webfetch/.
+class FileReadTool : public LlmTool {
+	Q_OBJECT
+
+	public:
+	explicit FileReadTool(QObject* parent = nullptr);
+
+	QString name() const override;
+	QString description() const override;
+	QJsonObject parameters() const override;
+	void execute(
+		const QString& toolCallId,
+		const QJsonObject& args,
+		std::function<void(const QJsonObject& result)> done) override;
+};
+
+} // namespace ZShell::llm