diff --git a/src/ai/ai.hpp b/src/ai/ai.hpp
new file mode 100644
--- /dev/null
+++ b/src/ai/ai.hpp
@@ -0,0 +1,102 @@
+/* $Id$ */
+
+/** @file ai.hpp Base functions for all AIs. */
+
+#ifndef AI_HPP
+#define AI_HPP
+
+#include "api/ai_event_types.hpp"
+
+#ifndef AI_CONFIG_HPP
+struct ltstr { bool operator()(const char *s1, const char *s2) const { return strcmp(s1, s2) < 0; } };
+#endif /* AI_CONFIG_HPP */
+typedef std::map<const char *, class AIInfo *, ltstr> AIInfoList;
+
+
+void CcAI(bool success, TileIndex tile, uint32 p1, uint32 p2);
+
+class AI {
+public:
+	/**
+	 * Is it possible to start a new AI company?
+	 * @return True if a new AI company can be started.
+	 */
+	static bool CanStartNew();
+
+	/**
+	 * Start a new AI company.
+	 * @param company At which slot the AI company should start.
+	 */
+	static void StartNew(CompanyID company);
+
+	/**
+	 * Called every game-tick to let AIs do something.
+	 */
+	static void GameLoop();
+
+	/**
+	 * Get the current AI tick.
+	 */
+	static uint GetTick();
+
+	/**
+	 * Stop a company to be controlled by an AI.
+	 * @param company The company from which the AI needs to detach.
+	 * @pre !IsHumanCompany(company).
+	 */
+	static void Stop(CompanyID company);
+
+	/**
+	 * Kill any and all AIs we manage.
+	 */
+	static void KillAll();
+
+	/**
+	 * Initialize the AI system.
+	 */
+	static void Initialize();
+
+	/**
+	 * Uninitialize the AI system
+	 * @param keepConfig Should we keep AIConfigs, or can we free that memory?
+	 */
+	static void Uninitialize(bool keepConfig);
+
+	/**
+	 * Reset all AIConfigs, and make them reload their AIInfo.
+	 * If the AIInfo could no longer be found, an error is reported to the user.
+	 */
+	static void ResetConfig();
+
+	/**
+	 * Queue a new event for an AI.
+	 */
+	static void NewEvent(CompanyID company, AIEvent *event);
+
+	/**
+	 * Broadcast a new event to all active AIs.
+	 */
+	static void BroadcastNewEvent(AIEvent *event, CompanyID skip_company = MAX_COMPANIES);
+
+	/**
+	 * Save data from an AI to a savegame.
+	 */
+	static void Save(CompanyID company);
+
+	/**
+	 * Load data for an AI from a savegame.
+	 */
+	static void Load(CompanyID company);
+
+	static char *GetConsoleList(char *p, const char *last);
+	static const AIInfoList *GetInfoList();
+	static AIInfo *GetCompanyInfo(const char *name);
+	static bool ImportLibrary(const char *library, const char *class_name, int version, HSQUIRRELVM vm);
+	static void Rescan();
+
+private:
+	static uint frame_counter;
+	static class AIScanner *ai_scanner;
+};
+
+#endif /* AI_HPP */