diff --git a/loader/CMakeLists.txt b/loader/CMakeLists.txt
index f2f716e2..4078d47f 100644
--- a/loader/CMakeLists.txt
+++ b/loader/CMakeLists.txt
@@ -22,7 +22,6 @@ file(GLOB SOURCES CONFIGURE_DEPENDS
 	src/loader/*.cpp
 	src/main.cpp
 	src/utils/*.cpp
-	src/index/*.cpp
 	src/ui/nodes/*.cpp
 	src/ui/internal/*.cpp
 	src/ui/internal/credits/*.cpp
@@ -110,7 +109,6 @@ target_include_directories(${PROJECT_NAME} PRIVATE
 	src/internal/
 	src/platform/
 	src/gui/
-	src/index/
 	md4c/src/
 	hash/
 	./ # lilac
diff --git a/loader/include/Geode/loader/Event.hpp b/loader/include/Geode/loader/Event.hpp
index 1ccc3348..75231573 100644
--- a/loader/include/Geode/loader/Event.hpp
+++ b/loader/include/Geode/loader/Event.hpp
@@ -99,7 +99,8 @@ namespace geode {
     public:
         void postFrom(Mod* sender);
 
-        inline void post() {
+        template<class = void>
+        void post() {
             postFrom(Mod::get());
         }
 
diff --git a/loader/include/Geode/loader/Index.hpp b/loader/include/Geode/loader/Index.hpp
new file mode 100644
index 00000000..8478435f
--- /dev/null
+++ b/loader/include/Geode/loader/Index.hpp
@@ -0,0 +1,86 @@
+#pragma once
+
+#include "Types.hpp"
+#include "ModInfo.hpp"
+#include "Event.hpp"
+#include <unordered_set>
+
+namespace geode {
+    using UpdateFinished = std::monostate;
+    using UpdateProgress = std::pair<uint8_t, std::string>;
+    using UpdateError    = std::string;
+    using UpdateStatus   = std::variant<UpdateFinished, UpdateProgress, UpdateError>;
+
+    class GEODE_DLL IndexUpdateEvent : public Event {
+    protected:
+        std::string m_sourceRepository;
+        UpdateStatus m_status;
+    
+    public:
+        IndexUpdateEvent(
+            std::string const& src,
+            UpdateStatus status
+        );
+        std::string getSource() const;
+        UpdateStatus getStatus() const;
+    };
+
+	class GEODE_DLL IndexUpdateFilter : public EventFilter<IndexUpdateEvent> {
+	public:
+		using Callback = void(IndexUpdateEvent*);
+	
+        ListenerResult handle(std::function<Callback> fn, IndexUpdateEvent* event);
+		IndexUpdateFilter();
+	};
+
+    struct GEODE_DLL IndexItem {
+        std::string sourceRepository;
+        ghc::filesystem::path path;
+        ModInfo info;
+        struct {
+            std::string url;
+            std::string hash;
+            std::unordered_set<PlatformID> platforms;
+        } download;
+        bool isFeatured;
+    };
+
+    struct GEODE_DLL IndexSource final {
+        std::string repository;
+        bool isUpToDate = false;
+
+        std::string dirname() const;
+    };
+
+    class GEODE_DLL Index final {
+    protected:
+        // for once, the fact that std::map is ordered is useful (this makes 
+        // getting the latest version of a mod as easy as items.rbegin())
+        using ItemVersions = std::map<size_t, IndexItem>;
+
+        std::vector<IndexSource> m_sources;
+        std::unordered_map<std::string, ItemVersions> m_items;
+
+        Index();
+
+        void checkSourceUpdates(IndexSource& src);
+        void downloadSource(IndexSource& src);
+        void updateSourceFromLocal(IndexSource& src);
+        void cleanupItems();
+
+    public:
+        static Index* get();
+
+        void addSource(std::string const& repository);
+        void removeSource(std::string const& repository);
+        std::vector<IndexSource> getSources() const;
+
+        std::vector<IndexItem> getItems() const;
+        bool isKnownItem(std::string const& id, std::optional<size_t> version) const;
+        std::optional<IndexItem> getItem(std::string const& id, std::optional<size_t> version) const;
+
+        bool isUpToDate() const;
+        void update(bool force = false);
+    };
+
+}
diff --git a/loader/include/Geode/platform/platform.hpp b/loader/include/Geode/platform/platform.hpp
index 1da9f6e3..88164d28 100644
--- a/loader/include/Geode/platform/platform.hpp
+++ b/loader/include/Geode/platform/platform.hpp
@@ -1,88 +1,9 @@
 #pragma once
 
 #include "cplatform.h"
-
+#include <string>
 #include <functional>
 
-namespace geode {
-    class PlatformID {
-    public:
-        enum {
-            Unknown = -1,
-            Windows,
-            MacOS,
-            iOS,
-            Android,
-            Linux,
-        };
-
-        using Type = decltype(Unknown);
-
-        Type m_value;
-
-        PlatformID(Type t) {
-            m_value = t;
-        }
-
-        PlatformID& operator=(Type t) {
-            m_value = t;
-            return *this;
-        }
-
-        bool operator==(int other) const {
-            return m_value == other;
-        }
-
-        bool operator==(PlatformID const& other) const {
-            return m_value == other.m_value;
-        }
-
-        bool operator<(PlatformID const& other) const {
-            return m_value < other.m_value;
-        }
-
-        bool operator>(PlatformID const& other) const {
-            return m_value > other.m_value;
-        }
-
-        operator int() const {
-            return m_value;
-        }
-
-        template <class T>
-        static PlatformID from(T t) {
-            return static_cast<Type>(t);
-        }
-
-        template <class T>
-        T to() const {
-            return static_cast<T>(m_value);
-        }
-
-        static constexpr char const* toString(Type lp) {
-            switch (lp) {
-                case Unknown: return "Unknown";
-                case Windows: return "Windows";
-                case MacOS: return "MacOS";
-                case iOS: return "iOS";
-                case Android: return "Android";
-                case Linux: return "Linux";
-                default: break;
-            }
-            return "Undefined";
-        }
-    };
-}
-
-namespace std {
-    template <>
-    struct hash<geode::PlatformID> {
-        inline std::size_t operator()(geode::PlatformID const& id) const {
-            return std::hash<geode::PlatformID::Type>()(id.m_value);
-        }
-    };
-}
-
 #if !defined(__PRETTY_FUNCTION__) && !defined(__GNUC__)
     #define GEODE_PRETTY_FUNCTION std::string(__FUNCSIG__)
 #else
@@ -92,7 +13,6 @@ namespace std {
 // Windows
 #ifdef GEODE_IS_WINDOWS
 
-    #define GEODE_PLATFORM_TARGET PlatformID::Windows
     #define GEODE_HIDDEN
     #define GEODE_INLINE __forceinline
     #define GEODE_VIRTUAL_CONSTEXPR
@@ -111,7 +31,6 @@ namespace std {
 
 #elif defined(GEODE_IS_MACOS)
 
-    #define GEODE_PLATFORM_TARGET PlatformID::MacOS
     #define GEODE_HIDDEN __attribute__((visibility("hidden")))
     #define GEODE_INLINE inline __attribute__((always_inline))
     #define GEODE_VIRTUAL_CONSTEXPR constexpr
@@ -130,7 +49,6 @@ namespace std {
 
 #elif defined(GEODE_IS_IOS)
 
-    #define GEODE_PLATFORM_TARGET PlatformID::iOS
     #define GEODE_HIDDEN __attribute__((visibility("hidden")))
     #define GEODE_INLINE inline __attribute__((always_inline))
     #define GEODE_VIRTUAL_CONSTEXPR constexpr
@@ -149,7 +67,6 @@ namespace std {
 
 #elif defined(GEODE_IS_ANDROID)
 
-    #define GEODE_PLATFORM_TARGET PlatformID::Android
     #define GEODE_HIDDEN __attribute__((visibility("hidden")))
     #define GEODE_INLINE inline __attribute__((always_inline))
     #define GEODE_VIRTUAL_CONSTEXPR constexpr
@@ -171,3 +88,105 @@ namespace std {
     #error "Unsupported Platform!"
 
 #endif
+
+namespace geode {
+    class PlatformID {
+    public:
+        enum {
+            Unknown = -1,
+            Windows,
+            MacOS,
+            iOS,
+            Android,
+            Linux,
+        };
+
+        using Type = decltype(Unknown);
+
+        Type m_value;
+
+        constexpr PlatformID(Type t) {
+            m_value = t;
+        }
+
+        constexpr PlatformID& operator=(Type t) {
+            m_value = t;
+            return *this;
+        }
+
+        constexpr bool operator==(int other) const {
+            return m_value == other;
+        }
+
+        constexpr bool operator==(PlatformID const& other) const {
+            return m_value == other.m_value;
+        }
+
+        constexpr bool operator<(PlatformID const& other) const {
+            return m_value < other.m_value;
+        }
+
+        constexpr bool operator>(PlatformID const& other) const {
+            return m_value > other.m_value;
+        }
+
+        constexpr operator int() const {
+            return m_value;
+        }
+
+        /**
+         * Parse string into PlatformID. String should be all-lowercase, for 
+         * example "windows" or "linux"
+         */
+        static GEODE_DLL PlatformID from(const char* str);
+        static GEODE_DLL PlatformID from(std::string const& str);
+
+        static constexpr char const* toString(Type lp) {
+            switch (lp) {
+                case Unknown: return "Unknown";
+                case Windows: return "Windows";
+                case MacOS: return "MacOS";
+                case iOS: return "iOS";
+                case Android: return "Android";
+                case Linux: return "Linux";
+                default: break;
+            }
+            return "Undefined";
+        }
+
+        template <class T>
+            requires requires(T t) {
+                static_cast<Type>(t);
+            }
+        constexpr static PlatformID from(T t) {
+            return static_cast<Type>(t);
+        }
+
+        template <class T>
+            requires requires(Type t) {
+                static_cast<T>(t);
+            }
+        constexpr T to() const {
+            return static_cast<T>(m_value);
+        }
+    };
+}
+
+namespace std {
+    template <>
+    struct hash<geode::PlatformID> {
+        inline std::size_t operator()(geode::PlatformID const& id) const {
+            return std::hash<geode::PlatformID::Type>()(id.m_value);
+        }
+    };
+}
+
+#ifdef GEODE_IS_WINDOWS
+    #define GEODE_PLATFORM_TARGET PlatformID::Windows
+#elif defined(GEODE_IS_MACOS)
+    #define GEODE_PLATFORM_TARGET PlatformID::MacOS
+#elif defined(GEODE_IS_IOS)
+    #define GEODE_PLATFORM_TARGET PlatformID::iOS
+#elif defined(GEODE_IS_ANDROID)
+    #define GEODE_PLATFORM_TARGET PlatformID::Android
+#endif
diff --git a/loader/include/Geode/utils/cocos.hpp b/loader/include/Geode/utils/cocos.hpp
index acbc9603..5650c2b3 100644
--- a/loader/include/Geode/utils/cocos.hpp
+++ b/loader/include/Geode/utils/cocos.hpp
@@ -3,10 +3,11 @@
 #include "casts.hpp"
 #include "../external/json/json.hpp"
 #include "general.hpp"
-#include <Geode/DefaultInclude.hpp>
+#include "../DefaultInclude.hpp"
 #include <cocos2d.h>
 #include <functional>
 #include <type_traits>
+#include "../loader/Event.hpp"
 
 // support converting ccColor3B / ccColor4B to / from json
 namespace cocos2d {
@@ -183,7 +184,7 @@ namespace geode {
     }
 }
 
-// Ref
+// Ref & Bug
 namespace geode {
     /**
      * A smart pointer to a managed CCObject-deriving class. Retains shared
diff --git a/loader/include/Geode/utils/file.hpp b/loader/include/Geode/utils/file.hpp
index 2d75fd7e..4ed20b8d 100644
--- a/loader/include/Geode/utils/file.hpp
+++ b/loader/include/Geode/utils/file.hpp
@@ -71,15 +71,20 @@ namespace geode::utils::file {
          * @param dir Directory to unzip the contents to
          */
         Result<> extractAllTo(Path const& dir);
-    };
 
-    /**
-     * Unzip file to directory
-     * @param from File to unzip
-     * @param to Directory to unzip to
-     * @returns Ok on success, Error on error
-     */
-    GEODE_DLL Result<> unzipTo(ghc::filesystem::path const& from, ghc::filesystem::path const& to);
+        /**
+         * Helper method for quickly unzipping a file
+         * @param from ZIP file to unzip
+         * @param to Directory to unzip to
+         * @param deleteZipAfter Whether to delete the zip after unzipping
+         * @returns Succesful result on success, errorful result on error
+         */
+        static Result<> intoDir(
+            Path const& from,
+            Path const& to,
+            bool deleteZipAfter = false
+        );
+    };
 
     GEODE_DLL bool openFolder(ghc::filesystem::path const& path);
 
diff --git a/loader/include/Geode/utils/general.hpp b/loader/include/Geode/utils/general.hpp
index 51330c63..707a0f78 100644
--- a/loader/include/Geode/utils/general.hpp
+++ b/loader/include/Geode/utils/general.hpp
@@ -2,7 +2,7 @@
 
 #include "Result.hpp"
 
-#include <Geode/DefaultInclude.hpp>
+#include "../DefaultInclude.hpp"
 #include <chrono>
 #include <iomanip>
 #include <sstream>
diff --git a/loader/include/Geode/utils/map.hpp b/loader/include/Geode/utils/map.hpp
index 5460aab0..e5110a27 100644
--- a/loader/include/Geode/utils/map.hpp
+++ b/loader/include/Geode/utils/map.hpp
@@ -18,7 +18,6 @@ namespace geode::utils::map {
      *                    beeing looked for, and false if not.
      * @returns True if value matching `containFunc` was found,
      * false if not.
-     * @author HJfod
      */
     template <typename T, typename R>
     bool contains(std::unordered_map<T, R> const& map, std::function<bool(R)> containFunc) {
@@ -38,7 +37,6 @@ namespace geode::utils::map {
      * @returns The value matching `selectFunc` if one was found,
      * otherwise the default value for type R or `nullptr` if R is
      * a pointer.
-     * @author HJfod
      */
     template <class T, class R>
     R select(std::unordered_map<T, R> const& map, std::function<bool(R)> selectFunc) {
@@ -58,7 +56,6 @@ namespace geode::utils::map {
      *                   return true if the item matches what is
      *                   beeing looked for, and false if not.
      * @returns Vector of all values that matched.
-     * @author HJfod
      */
     template <class T, class R>
     std::vector<R> selectAll(
@@ -77,10 +74,9 @@ namespace geode::utils::map {
      * Get all values in a map.
      * @param map Map to get values from
      * @returns Vector of all values.
-     * @author HJfod
      */
     template <class T, class R>
-    std::vector<R> getValues(std::unordered_map<T, R> const& map) {
+    std::vector<R> values(std::unordered_map<T, R> const& map) {
         std::vector<R> res;
         for (auto const& [_, r] : map) {
             res.push_back(r);
@@ -92,10 +88,9 @@ namespace geode::utils::map {
      * Get all keys in a map.
      * @param map Map to get keys from
      * @returns Vector of all keys.
-     * @author HJfod
      */
     template <class T, class R>
-    std::vector<T> getKeys(std::unordered_map<T, R> const& map) {
+    std::vector<T> keys(std::unordered_map<T, R> const& map) {
         std::vector<T> res;
         for (auto const& [t, _] : map) {
             res.push_back(t);
diff --git a/loader/src/hooks/LoadingLayer.cpp b/loader/src/hooks/LoadingLayer.cpp
index b40300a2..20257afa 100644
--- a/loader/src/hooks/LoadingLayer.cpp
+++ b/loader/src/hooks/LoadingLayer.cpp
@@ -1,13 +1,14 @@
+
 #include <InternalLoader.hpp>
 #include <array>
-
-USE_GEODE_NAMESPACE();
-
 #include <Geode/modify/LoadingLayer.hpp>
 #include <fmt/format.h>
 
+USE_GEODE_NAMESPACE();
+
 struct CustomLoadingLayer : Modify<CustomLoadingLayer, LoadingLayer> {
     bool m_updatingResources;
+    EventListener<ResourceDownloadFilter> m_resourceListener;
 
     CustomLoadingLayer() : m_updatingResources(false) {}
 
@@ -27,28 +28,14 @@ struct CustomLoadingLayer : Modify<CustomLoadingLayer, LoadingLayer> {
         label->setID("geode-loaded-info");
         this->addChild(label);
 
+        m_fields->m_resourceListener.bind(std::bind(
+            &CustomLoadingLayer::updateResourcesProgress,
+            this, std::placeholders::_1
+        ));
+
         // verify loader resources
-        if (!InternalLoader::get()->verifyLoaderResources(std::bind(
-                &CustomLoadingLayer::updateResourcesProgress, this, std::placeholders::_1,
-                std::placeholders::_2, std::placeholders::_3
-            ))) {
-            // auto bg = CCScale9Sprite::create(
-            //     "square02b_001.png", { 0.0f, 0.0f, 80.0f, 80.0f }
-            // );
-            // bg->setScale(.6f);
-            // bg->setColor({ 0, 0, 0 });
-            // bg->setOpacity(150);
-            // bg->setPosition(winSize / 2);
-            // this->addChild(bg);
-
-            // m_fields->m_updatingResourcesBG = bg;
-
-            // auto label = CCLabelBMFont::create("", "goldFont.fnt");
-            // label->setScale(1.1f);
-            // bg->addChild(label);
-
+        if (!InternalLoader::get()->verifyLoaderResources()) {
             m_fields->m_updatingResources = true;
-
             this->setUpdateText("Downloading Resources");
         }
 
@@ -67,30 +54,28 @@ struct CustomLoadingLayer : Modify<CustomLoadingLayer, LoadingLayer> {
         // );
     }
 
-    void updateResourcesProgress(UpdateStatus status, std::string const& info, uint8_t progress) {
-        switch (status) {
-            case UpdateStatus::Progress: {
-                this->setUpdateText("Downloading Resources: " + std::to_string(progress) + "%");
-            } break;
-
-            case UpdateStatus::Finished: {
-                this->setUpdateText("Resources Downloaded");
-                m_fields->m_updatingResources = false;
-                this->loadAssets();
-            } break;
-
-            case UpdateStatus::Failed: {
-                InternalLoader::platformMessageBox(
-                    "Error updating resources",
-                    "Unable to update Geode resources: " + info +
-                        ".\n"
-                        "The game will be loaded as normal, but please be aware "
-                        "that it may very likely crash."
-                );
-                this->setUpdateText("Resource Download Failed");
-                m_fields->m_updatingResources = false;
-                this->loadAssets();
-            } break;
+    void updateResourcesProgress(ResourceDownloadEvent* event) {
+        auto status = event->getStatus();
+        if (std::holds_alternative<UpdateProgress>(status)) {
+            auto prog = std::get<UpdateProgress>(status);
+            this->setUpdateText("Downloading Resources: " + std::to_string(prog.first) + "%");
+        }
+        else if (std::holds_alternative<UpdateFinished>(status)) {
+            this->setUpdateText("Resources Downloaded");
+            m_fields->m_updatingResources = false;
+            this->loadAssets();
+        }
+        else {
+            InternalLoader::platformMessageBox(
+                "Error updating resources",
+                "Unable to update Geode resources: " + 
+                std::get<UpdateError>(status) + ".\n"
+                "The game will be loaded as normal, but please be aware "
+                "that it may very likely crash."
+            );
+            this->setUpdateText("Resource Download Failed");
+            m_fields->m_updatingResources = false;
+            this->loadAssets();
         }
     }
 
diff --git a/loader/src/index/Index.cpp b/loader/src/index/Index.cpp
deleted file mode 100644
index 690259db..00000000
--- a/loader/src/index/Index.cpp
+++ /dev/null
@@ -1,703 +0,0 @@
-// #include "Index.hpp"
-
-// #include <Geode/binding/FLAlertLayer.hpp>
-// #include <Geode/loader/Loader.hpp>
-// #include <Geode/loader/Mod.hpp>
-// #include <Geode/loader/Index.hpp>
-// #include <Geode/utils/JsonValidation.hpp>
-// #include <Geode/utils/web.hpp>
-// #include <Geode/utils/file.hpp>
-// #include <Geode/utils/general.hpp>
-// #include <Geode/external/json/json.hpp>
-// #include <Geode/utils/map.hpp>
-// #include <Geode/utils/ranges.hpp>
-// #include <Geode/utils/string.hpp>
-// #include <fmt/format.h>
-// #include <hash.hpp>
-// #include <thread>
-
-// #define GITHUB_DONT_RATE_LIMIT_ME_PLS 0
-
-// template <class Json = nlohmann::json>
-// static Result<Json> readJSON(ghc::filesystem::path const& path) {
-//     GEODE_UNWRAP_INTO(
-//         std::string indexJsonData,
-//         utils::file::readString(path).expect("Unable to read {}", path.string())
-//     );
-//     try {
-//         return Ok(Json::parse(indexJsonData));
-//     }
-//     catch (std::exception& e) {
-//         return Err("Error parsing JSON: " + std::string(e.what()));
-//     }
-// }
-
-// static PlatformID platformFromString(std::string const& str) {
-//     switch (hash(utils::string::trim(utils::string::toLower(str)).c_str())) {
-//         default:
-//         case hash("unknown"): return PlatformID::Unknown;
-//         case hash("windows"): return PlatformID::Windows;
-//         case hash("macos"): return PlatformID::MacOS;
-//         case hash("ios"): return PlatformID::iOS;
-//         case hash("android"): return PlatformID::Android;
-//         case hash("linux"): return PlatformID::Linux;
-//     }
-// }
-
-// Index* Index::get() {
-//     static auto ret = new Index();
-//     return ret;
-// }
-
-// bool Index::isIndexUpdated() const {
-//     return m_upToDate;
-// }
-
-// std::vector<IndexItem> Index::getFeaturedItems() const {
-//     std::vector<IndexItem> items;
-//     items.reserve(m_featured.size());
-//     std::transform(
-//         m_featured.begin(), m_featured.end(), std::back_inserter(items),
-//         [this](auto const& item) {
-//             return this->getKnownItem(item);
-//         }
-//     );
-//     return items;
-// }
-
-// bool Index::isFeaturedItem(std::string const& item) const {
-//     return m_featured.count(item);
-// }
-
-// void Index::updateIndex(IndexUpdateCallback callback, bool force) {
-// #define RETURN_ERROR(str)                                   \
-//     std::string err__ = (str);                              \
-//     if (callback) callback(UpdateStatus::Failed, err__, 0); \
-//     log::info("Index update failed: {}", err__);            \
-//     return;
-
-//     // if already updated and no force, let
-//     // delegate know
-//     if (!force && m_upToDate) {
-//         if (callback) {
-//             callback(UpdateStatus::Finished, "Index already updated", 100);
-//         }
-//         return;
-//     }
-
-//     // create directory for the local clone of
-//     // the index
-//     auto indexDir = dirs::getIndexDir();
-//     ghc::filesystem::create_directories(indexDir);
-
-// #if GITHUB_DONT_RATE_LIMIT_ME_PLS == 1
-
-//     auto err = this->updateIndexFromLocalCache();
-//     if (!err) {
-//         RETURN_ERROR(err);
-//     }
-
-//     m_upToDate = true;
-//     m_updating = false;
-
-//     if (callback) callback(UpdateStatus::Finished, "", 100);
-//     return;
-
-// #endif
-
-//     // read sha of currently installed commit
-//     std::string currentCommitSHA = "";
-//     if (ghc::filesystem::exists(indexDir / "current")) {
-//         auto data = utils::file::readString(indexDir / "current");
-//         if (data) {
-//             currentCommitSHA = data.unwrap();
-//         }
-//     }
-
-//     web::AsyncWebRequest()
-//         .join("index-update")
-//         .header(fmt::format("If-None-Match: \"{}\"", currentCommitSHA))
-//         .header("Accept: application/vnd.github.sha")
-//         .fetch("https://api.github.com/repos/geode-sdk/mods/commits/main")
-//         .text()
-//         .then([this, force, callback, currentCommitSHA](std::string const& upcomingCommitSHA) {
-//             auto indexDir = Loader::get()->getGeodeSaveDirectory() / GEODE_INDEX_DIRECTORY;
-
-//             // gee i sure hope no one does 60 commits to the mod index an hour and download every
-//             // single one of them
-//             if (upcomingCommitSHA == "") {
-//                 auto err = this->updateIndexFromLocalCache();
-//                 if (!err) {
-//                     RETURN_ERROR(err.unwrapErr());
-//                 }
-                
-//                 m_upToDate = true;
-//                 m_updating = false;
-
-//                 if (callback) callback(UpdateStatus::Finished, "", 100);
-//                 return;
-//             }
-
-//             // update if forced or latest commit has
-//             // different sha
-//             if (force || currentCommitSHA != upcomingCommitSHA) {
-//                 // save new sha in file
-//                 (void)utils::file::writeString(indexDir / "current", upcomingCommitSHA);
-
-//                 web::AsyncWebRequest()
-//                     .join("index-download")
-//                     .fetch("https://github.com/geode-sdk/mods/zipball/main")
-//                     .into(indexDir / "index.zip")
-//                     .then([this, indexDir, callback](auto) {
-//                         // delete old index
-//                         try {
-//                             if (ghc::filesystem::exists(indexDir / "index")) {
-//                                 ghc::filesystem::remove_all(indexDir / "index");
-//                             }
-//                         }
-//                         catch (std::exception& e) {
-//                             RETURN_ERROR("Unable to delete old index " + std::string(e.what()));
-//                         }
-
-//                         // unzip new index
-//                         auto unzip = file::unzipTo(indexDir / "index.zip", indexDir);
-//                         if (!unzip) {
-//                             RETURN_ERROR(unzip.unwrapErr());
-//                         }
-
-//                         // update index
-//                         auto err = this->updateIndexFromLocalCache();
-//                         if (!err) {
-//                             RETURN_ERROR(err.unwrapErr());
-//                         }
-
-//                         m_upToDate = true;
-//                         m_updating = false;
-
-//                         if (callback) callback(UpdateStatus::Finished, "", 100);
-//                     })
-//                     .expect([callback](std::string const& err) {
-//                         RETURN_ERROR(err);
-//                     })
-//                     .progress([callback](web::SentAsyncWebRequest& req, double now, double total) {
-//                         if (callback)
-//                             callback(
-//                                 UpdateStatus::Progress, "Downloading",
-//                                 static_cast<int>(now / total * 100.0)
-//                             );
-//                     });
-//             }
-//             else {
-//                 auto err = this->updateIndexFromLocalCache();
-//                 if (!err) {
-//                     RETURN_ERROR(err.unwrapErr());
-//                 }
-
-//                 m_upToDate = true;
-//                 m_updating = false;
-
-//                 if (callback) callback(UpdateStatus::Finished, "", 100);
-//             }
-//         })
-//         .expect([callback](std::string const& err) {
-//             RETURN_ERROR(err);
-//         })
-//         .progress([callback](web::SentAsyncWebRequest& req, double now, double total) {
-//             if (callback)
-//                 callback(
-//                     UpdateStatus::Progress, "Downloading", static_cast<int>(now / total * 100.0)
-//                 );
-//         });
-// }
-
-// void Index::addIndexItemFromFolder(ghc::filesystem::path const& dir) {
-//     if (ghc::filesystem::exists(dir / "index.json")) {
-//         auto readJson = readJSON(dir / "index.json");
-//         if (!readJson) {
-//             log::warn("Error reading index.json: {}, skipping", readJson.unwrapErr());
-//             return;
-//         }
-//         auto json = readJson.unwrap();
-//         if (!json.is_object()) {
-//             log::warn("[index.json] is not an object, skipping");
-//             return;
-//         }
-
-//         auto infoRes = ModInfo::createFromFile(dir / "mod.json");
-//         if (!infoRes) {
-//             log::warn("{}: {}, skipping", dir, infoRes.unwrapErr());
-//             return;
-//         }
-//         auto info = infoRes.unwrap();
-
-//         // make sure only latest version is present in index
-//         auto old = std::find_if(m_items.begin(), m_items.end(), [info](IndexItem const& item) {
-//             return item.m_info.m_id == info.m_id;
-//         });
-//         if (old != m_items.end()) {
-//             // this one is newer
-//             if (old->m_info.m_version < info.m_version) {
-//                 m_items.erase(old);
-//             } else {
-//                 log::warn(
-//                     "Found older version of ({} < {}) of {}, skipping",
-//                     info.m_version, old->m_info.m_version, info.m_id
-//                 );
-//                 return;
-//             }
-//         }
-
-//         IndexItem item;
-
-//         item.m_path = dir;
-//         item.m_info = info;
-
-//         if (!json.contains("download") || !json["download"].is_object()) {
-//             log::warn("[index.json].download is not an object, skipping");
-//             return;
-//         }
-
-// #define REQUIRE_DOWNLOAD_KEY(key, type)                                          \
-//     if (!download.contains(key) || !download[key].is_##type()) {                 \
-//         log::warn("[index.json].download." key " is not a " #type ", skipping"); \
-//         return;                                                                  \
-//     }
-
-//         try {
-//             auto download = json["download"];
-
-//             REQUIRE_DOWNLOAD_KEY("url", string);
-//             REQUIRE_DOWNLOAD_KEY("name", string);
-//             REQUIRE_DOWNLOAD_KEY("hash", string);
-//             REQUIRE_DOWNLOAD_KEY("platforms", array);
-
-//             item.m_download.m_url = download["url"];
-//             item.m_download.m_filename = download["name"];
-//             item.m_download.m_hash = download["hash"];
-//             for (auto& platform : download["platforms"]) {
-//                 item.m_download.m_platforms.insert(platformFromString(platform));
-//             }
-
-//             if (json.contains("categories")) {
-//                 if (!json["categories"].is_array()) {
-//                     log::warn("[index.json].categories is not an array, skipping");
-//                     return;
-//                 }
-//                 item.m_categories = json["categories"].template get<std::unordered_set<std::string>>();
-//                 m_categories.insert(item.m_categories.begin(), item.m_categories.end());
-//             }
-//         }
-//         catch (std::exception& e) {
-//             log::warn("[index.json] parsing error: {}, skipping", e.what());
-//             return;
-//         }
-
-//         m_items.push_back(item);
-//     }
-//     else {
-//         log::warn("Index directory {} is missing index.json, skipping", dir);
-//     }
-// }
-
-// Result<> Index::updateIndexFromLocalCache() {
-//     m_items.clear();
-//     auto baseIndexDir = Loader::get()->getGeodeSaveDirectory() / GEODE_INDEX_DIRECTORY;
-
-//     // load geode.json (index settings)
-//     if (auto baseIndexJson = readJSON(baseIndexDir / "geode.json")) {
-//         auto json = baseIndexJson.unwrap();
-//         auto checker = JsonChecker(json);
-//         checker.root("[index/geode.json]").obj().has("featured").into(m_featured);
-//     }
-
-//     // load index mods
-//     auto modsDir = baseIndexDir / "index";
-//     if (ghc::filesystem::exists(modsDir)) {
-//         for (auto const& dir : ghc::filesystem::directory_iterator(modsDir)) {
-//             if (ghc::filesystem::is_directory(dir)) {
-//                 this->addIndexItemFromFolder(dir);
-//             }
-//         }
-//         log::info("Index updated");
-//         return Ok();
-//     }
-//     else {
-//         return Err(
-//             "Index appears not to have been "
-//             "downloaded, or is fully empty"
-//         );
-//     }
-// }
-
-// std::vector<IndexItem> Index::getItems() const {
-//     return m_items;
-// }
-
-// std::unordered_set<std::string> Index::getCategories() const {
-//     return m_categories;
-// }
-
-// bool Index::isKnownItem(std::string const& id) const {
-//     for (auto& item : m_items) {
-//         if (item.m_info.m_id == id) return true;
-//     }
-//     return false;
-// }
-
-// IndexItem Index::getKnownItem(std::string const& id) const {
-//     for (auto& item : m_items) {
-//         if (item.m_info.m_id == id) {
-//             return item;
-//         }
-//     }
-//     return IndexItem();
-// }
-
-// struct UninstalledDependency {
-//     std::string m_id;
-//     bool m_isInIndex;
-// };
-
-// static void getUninstalledDependenciesRecursive(
-//     ModInfo const& info, std::vector<UninstalledDependency>& deps
-// ) {
-//     for (auto& dep : info.m_dependencies) {
-//         UninstalledDependency d;
-//         d.m_isInIndex = Index::get()->isKnownItem(dep.m_id);
-//         if (!Loader::get()->isModInstalled(dep.m_id)) {
-//             d.m_id = dep.m_id;
-//             deps.push_back(d);
-//         }
-//         if (d.m_isInIndex) {
-//             getUninstalledDependenciesRecursive(Index::get()->getKnownItem(dep.m_id).m_info, deps);
-//         }
-//     }
-// }
-
-// Result<std::vector<std::string>> Index::checkDependenciesForItem(IndexItem const& item) {
-//     // todo: check versions
-//     std::vector<UninstalledDependency> deps;
-//     getUninstalledDependenciesRecursive(item.m_info, deps);
-//     if (deps.size()) {
-//         std::vector<std::string> unknownDeps;
-//         for (auto& dep : deps) {
-//             if (!dep.m_isInIndex) {
-//                 unknownDeps.push_back(dep.m_id);
-//             }
-//         }
-//         if (unknownDeps.size()) {
-//             std::string list = "";
-//             for (auto& ud : unknownDeps) {
-//                 list += "<cp>" + ud + "</c>, ";
-//             }
-//             list.pop_back();
-//             list.pop_back();
-//             return Err(
-//                 "This mod or its dependencies <cb>depends</c> on the "
-//                 "following unknown mods: " +
-//                 list +
-//                 ". You will have "
-//                 "to manually install these mods before you can install "
-//                 "this one."
-//             );
-//         }
-//         std::vector<std::string> list = {};
-//         for (auto& d : deps) {
-//             list.push_back(d.m_id);
-//         }
-//         list.push_back(item.m_info.m_id);
-//         return Ok(list);
-//     }
-//     else {
-//         return Ok<std::vector<std::string>>({ item.m_info.m_id });
-//     }
-// }
-
-// Result<InstallHandle> Index::installItems(std::vector<IndexItem> const& items) {
-//     std::vector<std::string> ids {};
-//     for (auto& item : items) {
-//         if (!item.m_download.m_platforms.count(GEODE_PLATFORM_TARGET)) {
-//             return Err(
-//                 "This mod is not available on your "
-//                 "current platform \"" GEODE_PLATFORM_NAME "\" - Sorry! :("
-//             );
-//         }
-//         if (!item.m_download.m_url.size()) {
-//             return Err(
-//                 "Download URL not set! Report this bug to "
-//                 "the Geode developers - this should not happen, ever."
-//             );
-//         }
-//         if (!item.m_download.m_filename.size()) {
-//             return Err(
-//                 "Download filename not set! Report this bug to "
-//                 "the Geode developers - this should not happen, ever."
-//             );
-//         }
-//         if (!item.m_download.m_hash.size()) {
-//             return Err(
-//                 "Checksum not set! Report this bug to "
-//                 "the Geode developers - this should not happen, ever."
-//             );
-//         }
-//         GEODE_UNWRAP_INTO(auto list, checkDependenciesForItem(item));
-//         ranges::push(ids, list);
-//     }
-//     auto ret = std::make_shared<InstallItems>(std::unordered_set(ids.begin(), ids.end()));
-//     m_installations.insert(ret);
-//     return Ok(ret);
-// }
-
-// Result<InstallHandle> Index::installItem(IndexItem const& item) {
-//     return this->installItems({ item });
-// }
-
-// bool Index::isUpdateAvailableForItem(std::string const& id) const {
-//     if (!this->isKnownItem(id)) {
-//         return false;
-//     }
-//     return this->isUpdateAvailableForItem(this->getKnownItem(id));
-// }
-
-// bool Index::isUpdateAvailableForItem(IndexItem const& item) const {
-//     if (!Loader::get()->isModInstalled(item.m_info.m_id)) {
-//         return false;
-//     }
-//     // has the mod been updated (but update not yet been applied by restarting game)
-//     if (m_updated.count(item.m_info.m_id)) {
-//         return false;
-//     }
-//     return item.m_info.m_version > Loader::get()->getInstalledMod(item.m_info.m_id)->getVersion();
-// }
-
-// bool Index::areUpdatesAvailable() const {
-//     for (auto& item : m_items) {
-//         if (this->isUpdateAvailableForItem(item.m_info.m_id)) {
-//             return true;
-//         }
-//     }
-//     return false;
-// }
-
-// Result<InstallHandle> Index::installAllUpdates() {
-//     // find items that need updating
-//     std::vector<IndexItem> itemsToUpdate {};
-//     for (auto& item : m_items) {
-//         if (this->isUpdateAvailableForItem(item)) {
-//             itemsToUpdate.push_back(item);
-//         }
-//     }
-//     return this->installItems(itemsToUpdate);
-// }
-
-// std::vector<InstallHandle> Index::getRunningInstallations() const {
-//     return std::vector<InstallHandle>(m_installations.begin(), m_installations.end());
-// }
-
-// InstallHandle Index::isInstallingItem(std::string const& id) {
-//     for (auto& inst : m_installations) {
-//         if (inst->m_toInstall.count(id)) {
-//             return inst;
-//         }
-//     }
-//     return nullptr;
-// }
-
-// std::unordered_set<std::string> InstallItems::toInstall() const {
-//     return m_toInstall;
-// }
-
-// InstallItems::CallbackID InstallItems::join(ItemInstallCallback callback) {
-//     // already finished?
-//     if (m_started && this->finished()) {
-//         callback(shared_from_this(), UpdateStatus::Finished, "", 100);
-//         return 0;
-//     }
-//     // start at one because 0 means invalid callback
-//     static CallbackID COUNTER = 1;
-//     if (callback) {
-//         auto id = COUNTER++;
-//         m_callbacks.insert({ id, callback });
-//         return id;
-//     }
-//     return 0;
-// }
-
-// void InstallItems::leave(InstallItems::CallbackID id) {
-//     m_callbacks.erase(id);
-// }
-
-// void InstallItems::post(UpdateStatus status, std::string const& info, uint8_t progress) {
-//     for (auto& [_, cb] : m_callbacks) {
-//         cb(shared_from_this(), status, info, progress);
-//     }
-// }
-
-// void InstallItems::progress(std::string const& info, uint8_t progress) {
-//     this->post(UpdateStatus::Progress, info, progress);
-// }
-
-// void InstallItems::error(std::string const& info) {
-//     this->post(UpdateStatus::Failed, info, 0);
-// }
-
-// void InstallItems::finish(bool replaceFiles) {
-//     // move files from temp dir to geode directory
-//     auto tempDir = Loader::get()->getGeodeSaveDirectory() / GEODE_INDEX_DIRECTORY / "temp";
-//     for (auto& file : ghc::filesystem::directory_iterator(tempDir)) {
-//         try {
-//             auto modDir = Loader::get()->getGeodeDirectory() / "mods";
-//             auto targetFile = modDir / file.path().filename();
-//             auto targetName = file.path().stem();
-
-//             if (!replaceFiles) {
-//                 // find valid filename that doesn't exist yet
-//                 auto filename = ghc::filesystem::path(targetName).replace_extension("").string();
-
-//                 size_t number = 0;
-//                 while (ghc::filesystem::exists(targetFile)) {
-//                     targetFile = modDir / (filename + std::to_string(number) + ".geode");
-//                     number++;
-//                 }
-//             }
-
-//             // move file
-//             ghc::filesystem::rename(file, targetFile);
-//         }
-//         catch (std::exception& e) {
-//             try {
-//                 ghc::filesystem::remove_all(tempDir);
-//             }
-//             catch (...) {
-//             }
-//             return this->error(
-//                 "Unable to move downloaded file to mods directory: \"" + std::string(e.what()) +
-//                 " \" "
-//                 "(This might be due to insufficient permissions to "
-//                 "write files under SteamLibrary, try running GD as "
-//                 "administrator)"
-//             );
-//         }
-//     }
-
-//     // load mods
-//     (void)Loader::get()->refreshModsList();
-
-//     // finished
-//     this->post(UpdateStatus::Finished, "", 100);
-
-//     // let index know these mods have been updated
-//     for (auto& inst : m_toInstall) {
-//         Index::get()->m_updated.insert(inst);
-//     }
-
-//     // if no one is listening, show a popup anyway
-//     if (!m_callbacks.size()) {
-//         FLAlertLayer::create(
-//             "Mods installed",
-//             "The following <cy>mods</c> have been installed: " +
-//                 ranges::join(m_toInstall, std::string(",")) +
-//                 "\n"
-//                 "Please <cr>restart the game</c> to apply",
-//             "OK"
-//         )
-//             ->show();
-//     }
-
-//     // no longer need to ensure aliveness
-//     Index::get()->m_installations.erase(shared_from_this());
-// }
-
-// InstallItems::CallbackID InstallItems::start(ItemInstallCallback callback, bool replaceFiles) {
-//     auto id = this->join(callback);
-
-//     // check if started already, if so, behave like join
-//     if (m_started) return id;
-//     m_started = true;
-
-//     for (auto& inst : m_toInstall) {
-//         // by virtue of running this function we know item must be valid
-//         auto item = Index::get()->getKnownItem(inst);
-
-//         auto indexDir = Loader::get()->getGeodeSaveDirectory() / GEODE_INDEX_DIRECTORY;
-//         (void)file::createDirectoryAll(indexDir / "temp");
-//         auto tempFile = indexDir / "temp" / item.m_download.m_filename;
-
-//         m_downloaded.push_back(tempFile);
-
-//         auto handle =
-//             web::AsyncWebRequest()
-//                 .join("install_mod_" + inst)
-//                 .fetch(item.m_download.m_url)
-//                 .into(tempFile)
-//                 .then([this, replaceFiles, item, inst, indexDir, tempFile](auto) {
-//                     // check for 404
-//                     auto notFound = utils::file::readString(tempFile);
-//                     if (notFound && notFound.unwrap() == "Not Found") {
-//                         try {
-//                             ghc::filesystem::remove(tempFile);
-//                         }
-//                         catch (...) {
-//                         }
-//                         return this->error(
-//                             "Binary file download returned \"Not found\". Report "
-//                             "this to the Geode development team."
-//                         );
-//                     }
-
-//                     // verify checksum
-//                     this->progress("Verifying", 100);
-//                     if (::calculateHash(tempFile) != item.m_download.m_hash) {
-//                         try {
-//                             ghc::filesystem::remove(tempFile);
-//                         }
-//                         catch (...) {
-//                         }
-//                         return this->error(
-//                             "Checksum mismatch! (Downloaded file did not match what "
-//                             "was expected. Try again, and if the download fails another time, "
-//                             "report this to the Geode development team."
-//                         );
-//                     }
-
-//                     // finished() just checks if the web requests are done
-//                     if (this->finished()) {
-//                         this->finish(replaceFiles);
-//                     }
-//                 })
-//                 .expect([this, inst](std::string const& error) {
-//                     this->error(error);
-//                     this->cancel();
-//                 })
-//                 .cancelled([this, item](auto&) {
-//                     this->cancel();
-//                 })
-//                 .progress([this, inst](web::SentAsyncWebRequest&, double now, double total) {
-//                     this->progress("Downloading binary", static_cast<uint8_t>(now / total * 100.0));
-//                 })
-//                 .send();
-
-//         m_handles.push_back(handle);
-//     }
-//     // manage installation in the index until it's finished so
-//     // even if no one listens to it it doesn't get freed from
-//     // memory
-//     Index::get()->m_installations.insert(shared_from_this());
-
-//     return id;
-// }
-
-// bool InstallItems::finished() const {
-//     for (auto& inst : m_handles) {
-//         if (!inst->finished()) {
-//             return false;
-//         }
-//     }
-//     return true;
-// }
-
-// void InstallItems::cancel() {
-//     for (auto& inst : m_handles) {
-//         inst->cancel();
-//     }
-// }
diff --git a/loader/src/index/Index.hpp b/loader/src/index/Index.hpp
deleted file mode 100644
index 1b548628..00000000
--- a/loader/src/index/Index.hpp
+++ /dev/null
@@ -1,117 +0,0 @@
-#pragma once
-
-#include <Geode/utils/web.hpp>
-#include <mutex>
-#include <optional>
-#include <unordered_set>
-
-USE_GEODE_NAMESPACE();
-
-class Index;
-struct ModInstallUpdate;
-struct InstallItems;
-
-using InstallHandle = std::shared_ptr<InstallItems>;
-
-// todo: make index use events
-
-enum class UpdateStatus {
-    Progress,
-    Failed,
-    Finished,
-};
-
-using ItemInstallCallback =
-    std::function<void(InstallHandle, UpdateStatus, std::string const&, uint8_t)>;
-using IndexUpdateCallback = std::function<void(UpdateStatus, std::string const&, uint8_t)>;
-
-struct IndexItem {
-    struct Download {
-        std::string m_url;
-        std::string m_filename;
-        std::string m_hash;
-        std::unordered_set<PlatformID> m_platforms;
-    };
-
-    ghc::filesystem::path m_path;
-    ModInfo m_info;
-    Download m_download;
-    std::unordered_set<std::string> m_categories;
-};
-
-struct InstallItems final : public std::enable_shared_from_this<InstallItems> {
-public:
-    using CallbackID = size_t;
-
-private:
-    bool m_started = false;
-    std::unordered_set<std::string> m_toInstall;
-    std::vector<web::SentAsyncWebRequestHandle> m_handles;
-    std::unordered_map<CallbackID, ItemInstallCallback> m_callbacks;
-    std::vector<ghc::filesystem::path> m_downloaded;
-
-    void post(UpdateStatus status, std::string const& info, uint8_t progress);
-    void progress(std::string const& info, uint8_t progress);
-    void error(std::string const& info);
-    void finish(bool replaceFiles);
-
-    friend class Index;
-
-public:
-    std::unordered_set<std::string> toInstall() const;
-
-    inline InstallItems(std::unordered_set<std::string> const& toInstall) :
-        m_toInstall(toInstall) {}
-
-    void cancel();
-    bool finished() const;
-
-    CallbackID join(ItemInstallCallback callback);
-    void leave(CallbackID id);
-
-    CallbackID start(ItemInstallCallback callback, bool replaceFiles = true);
-};
-
-class Index {
-protected:
-    bool m_upToDate = false;
-    bool m_updating = false;
-    mutable std::mutex m_callbacksMutex;
-    std::vector<IndexItem> m_items;
-    std::unordered_set<InstallHandle> m_installations;
-    mutable std::mutex m_ticketsMutex;
-    std::unordered_set<std::string> m_featured;
-    std::unordered_set<std::string> m_categories;
-    std::unordered_set<std::string> m_updated;
-
-    void addIndexItemFromFolder(ghc::filesystem::path const& dir);
-    Result<> updateIndexFromLocalCache();
-
-    Result<std::vector<std::string>> checkDependenciesForItem(IndexItem const& item);
-
-    friend struct InstallItems;
-
-public:
-    static Index* get();
-
-    std::vector<IndexItem> getItems() const;
-    bool isKnownItem(std::string const& id) const;
-    IndexItem getKnownItem(std::string const& id) const;
-
-    std::unordered_set<std::string> getCategories() const;
-    std::vector<IndexItem> getFeaturedItems() const;
-    bool isFeaturedItem(std::string const& item) const;
-
-    Result<InstallHandle> installItems(std::vector<IndexItem> const& item);
-    Result<InstallHandle> installItem(IndexItem const& item);
-    std::vector<InstallHandle> getRunningInstallations() const;
-    InstallHandle isInstallingItem(std::string const& id);
-
-    bool isUpdateAvailableForItem(std::string const& id) const;
-    bool isUpdateAvailableForItem(IndexItem const& item) const;
-    bool areUpdatesAvailable() const;
-    Result<InstallHandle> installAllUpdates();
-
-    bool isIndexUpdated() const;
-    void updateIndex(IndexUpdateCallback callback, bool force = false);
-};
diff --git a/loader/src/internal/InternalLoader.cpp b/loader/src/internal/InternalLoader.cpp
index 4a718741..f96dd4c2 100644
--- a/loader/src/internal/InternalLoader.cpp
+++ b/loader/src/internal/InternalLoader.cpp
@@ -16,6 +16,16 @@
 #include <thread>
 #include <vector>
 
+ListenerResult ResourceDownloadFilter::handle(
+    std::function<Callback> fn,
+    ResourceDownloadEvent* event
+) {
+    fn(event);
+    return ListenerResult::Propagate;
+}
+
+ResourceDownloadFilter::ResourceDownloadFilter() {}
+
 InternalLoader::InternalLoader() : Loader() {}
 
 InternalLoader::~InternalLoader() {
@@ -93,7 +103,7 @@ void InternalLoader::loadInfoAlerts(nlohmann::json& json) {
     m_shownInfoAlerts = json["alerts"].get<std::unordered_set<std::string>>();
 }
 
-void InternalLoader::downloadLoaderResources(IndexUpdateCallback callback) {
+void InternalLoader::downloadLoaderResources() {
     auto version = this->getVersion().toString();
     auto tempResourcesZip = dirs::getTempDir() / "new.zip";
     auto resourcesDir = dirs::getGeodeResourcesDir() / InternalMod::get()->getID();
@@ -104,38 +114,32 @@ void InternalLoader::downloadLoaderResources(IndexUpdateCallback callback) {
             "https://github.com/geode-sdk/geode/releases/download/{}/resources.zip", version
         ))
         .into(tempResourcesZip)
-        .then([tempResourcesZip, resourcesDir, callback](auto) {
+        .then([tempResourcesZip, resourcesDir](auto) {
             // unzip resources zip
-            auto unzip = file::unzipTo(tempResourcesZip, resourcesDir);
+            auto unzip = file::Unzip::intoDir(tempResourcesZip, resourcesDir, true);
             if (!unzip) {
-                if (callback)
-                    callback(
-                        UpdateStatus::Failed, "Unable to unzip new resources: " + unzip.unwrapErr(), 0
-                    );
-                return;
+                return ResourceDownloadEvent(
+                    UpdateError("Unable to unzip new resources: " + unzip.unwrapErr())
+                ).post();
             }
-            // delete resources zip
-            try {
-                ghc::filesystem::remove(tempResourcesZip);
-            }
-            catch (...) {
-            }
-
-            if (callback) callback(UpdateStatus::Finished, "Resources updated", 100);
+            ResourceDownloadEvent(UpdateFinished()).post();
         })
-        .expect([callback](std::string const& info) {
-            if (callback) callback(UpdateStatus::Failed, info, 0);
+        .expect([](std::string const& info) {
+            ResourceDownloadEvent(
+                UpdateError("Unable to download resources: " + info)
+            ).post();
         })
-        .progress([callback](auto&, double now, double total) {
-            if (callback)
-                callback(
-                    UpdateStatus::Progress, "Downloading resources",
-                    static_cast<uint8_t>(now / total * 100.0)
-                );
+        .progress([](auto&, double now, double total) {
+            ResourceDownloadEvent(
+                UpdateProgress(
+                    static_cast<uint8_t>(now / total * 100.0),
+                    "Downloading resources"
+                )
+            ).post();
         });
 }
 
-bool InternalLoader::verifyLoaderResources(IndexUpdateCallback callback) {
+bool InternalLoader::verifyLoaderResources() {
     static std::optional<bool> CACHED = std::nullopt;
     if (CACHED.has_value()) {
         return CACHED.value();
@@ -145,8 +149,11 @@ bool InternalLoader::verifyLoaderResources(IndexUpdateCallback callback) {
     auto resourcesDir = dirs::getGeodeResourcesDir() / InternalMod::get()->getID();
 
     // if the resources dir doesn't exist, then it's probably incorrect
-    if (!(ghc::filesystem::exists(resourcesDir) && ghc::filesystem::is_directory(resourcesDir))) {
-        this->downloadLoaderResources(callback);
+    if (!(
+        ghc::filesystem::exists(resourcesDir) &&
+        ghc::filesystem::is_directory(resourcesDir)
+    )) {
+        this->downloadLoaderResources();
         return false;
     }
 
@@ -166,7 +173,7 @@ bool InternalLoader::verifyLoaderResources(IndexUpdateCallback callback) {
             log::debug(
                 "compare {} {} {}", file.path().string(), hash, LOADER_RESOURCE_HASHES.at(name)
             );
-            this->downloadLoaderResources(callback);
+            this->downloadLoaderResources();
             return false;
         }
         coverage += 1;
@@ -174,7 +181,7 @@ bool InternalLoader::verifyLoaderResources(IndexUpdateCallback callback) {
 
     // make sure every file was found
     if (coverage != LOADER_RESOURCE_HASHES.size()) {
-        this->downloadLoaderResources(callback);
+        this->downloadLoaderResources();
         return false;
     }
 
diff --git a/loader/src/internal/InternalLoader.hpp b/loader/src/internal/InternalLoader.hpp
index 8ac2170b..716278b6 100644
--- a/loader/src/internal/InternalLoader.hpp
+++ b/loader/src/internal/InternalLoader.hpp
@@ -1,8 +1,8 @@
 #pragma once
 
-#include "../index/Index.hpp"
 #include "FileWatcher.hpp"
 
+#include <Geode/loader/Index.hpp>
 #include <Geode/loader/Loader.hpp>
 #include <Geode/loader/Log.hpp>
 #include <Geode/utils/Result.hpp>
@@ -15,6 +15,23 @@
 
 USE_GEODE_NAMESPACE();
 
+class ResourceDownloadEvent : public Event {
+protected:
+    UpdateStatus m_status;
+
+public:
+    ResourceDownloadEvent(UpdateStatus status);
+    UpdateStatus getStatus() const;
+};
+
+class GEODE_DLL ResourceDownloadFilter : public EventFilter<ResourceDownloadEvent> {
+public:
+    using Callback = void(ResourceDownloadEvent*);
+
+    ListenerResult handle(std::function<Callback> fn, ResourceDownloadEvent* event);
+    ResourceDownloadFilter();
+};
+
 /**
  * Internal extension of Loader for private information
  * @class InternalLoader
@@ -29,7 +46,7 @@ protected:
     void saveInfoAlerts(nlohmann::json& json);
     void loadInfoAlerts(nlohmann::json& json);
 
-    void downloadLoaderResources(IndexUpdateCallback callback);
+    void downloadLoaderResources();
 
     bool loadHooks();
     void setupIPC();
@@ -66,7 +83,7 @@ public:
     void closePlatformConsole();
     static void platformMessageBox(char const* title, std::string const& info);
 
-    bool verifyLoaderResources(IndexUpdateCallback callback);
+    bool verifyLoaderResources();
 
     friend int geodeEntry(void* platformData);
 };
diff --git a/loader/src/loader/Index.cpp b/loader/src/loader/Index.cpp
new file mode 100644
index 00000000..bef2e78f
--- /dev/null
+++ b/loader/src/loader/Index.cpp
@@ -0,0 +1,256 @@
+#include <Geode/loader/Index.hpp>
+#include <Geode/loader/Loader.hpp>
+#include <Geode/loader/Dirs.hpp>
+#include <Geode/utils/ranges.hpp>
+#include <Geode/utils/web.hpp>
+#include <Geode/utils/string.hpp>
+#include <Geode/utils/map.hpp>
+
+USE_GEODE_NAMESPACE();
+
+struct IndexSourceSaveData {
+    std::string downloadedCommitSHA;
+};
+NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(IndexSourceSaveData, downloadedCommitSHA);
+
+struct IndexSaveData {
+    std::unordered_map<std::string, IndexSourceSaveData> sources;
+};
+NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(IndexSaveData, sources);
+
+std::string IndexSource::dirname() const {
+    return string::replace(this->repository, "/", "_");
+}
+
+IndexUpdateEvent::IndexUpdateEvent(
+    std::string const& src,
+    UpdateStatus status
+) : m_sourceRepository(src), m_status(status) {}
+
+std::string IndexUpdateEvent::getSource() const {
+    return m_sourceRepository;
+}
+
+UpdateStatus IndexUpdateEvent::getStatus() const {
+    return m_status;
+}
+
+ListenerResult IndexUpdateFilter::handle(
+    std::function<Callback> fn,
+    IndexUpdateEvent* event
+) {
+    fn(event);
+    return ListenerResult::Propagate;
+}
+
+IndexUpdateFilter::IndexUpdateFilter() {}
+
+Index::Index() {
+    this->addSource("https://github.com/geode-sdk/index-test");
+}
+
+Index* Index::get() {
+    auto inst = new Index();
+    return inst;
+}
+
+void Index::addSource(std::string const& repository) {
+    m_sources.push_back(IndexSource {
+        .repository = repository
+    });
+}
+
+void Index::removeSource(std::string const& repository) {
+    ranges::remove(m_sources, [repository](IndexSource const& src) {
+        return src.repository == repository;
+    });
+}
+
+std::vector<IndexSource> Index::getSources() const {
+    return m_sources;
+}
+
+bool Index::isUpToDate() const {
+    for (auto& source : m_sources) {
+        if (!source.isUpToDate) {
+            return false;
+        }
+    }
+    return true;
+}
+
+void Index::checkSourceUpdates(IndexSource& src) {
+    if (src.isUpToDate) {
+        IndexUpdateEvent(src.repository, UpdateFinished()).post();
+        return;
+    }
+    IndexUpdateEvent(src.repository, UpdateProgress(0, "Checking status")).post();
+    auto data = Mod::get()->getSavedMutable<IndexSaveData>("index");
+    auto oldSHA = data.sources[src.repository].downloadedCommitSHA;
+    web::AsyncWebRequest()
+        .join(fmt::format("index-update-{}", src.repository))
+        .header(fmt::format("If-None-Match: \"{}\"", oldSHA))
+        .header("Accept: application/vnd.github.sha")
+        .fetch(fmt::format("https://api.github.com/repos/{}/commits/main", src.repository))
+        .text()
+        .then([this, &src, oldSHA](std::string const& newSHA) {
+            // if no new hash was given (rate limited) or the new hash is the 
+            // same as old, then just update from local cache
+            if (newSHA.empty() || oldSHA == newSHA) {
+                this->updateSourceFromLocal(src);
+            }
+            // otherwise save hash and download source
+            else {
+                auto data = Mod::get()->getSavedMutable<IndexSaveData>("index");
+                data.sources[src.repository].downloadedCommitSHA = newSHA;
+                this->downloadSource(src);
+            }
+        })
+        .expect([&src](std::string const& err) {
+            IndexUpdateEvent(
+                src.repository,
+                UpdateError(fmt::format("Error checking for updates: {}", err))
+            ).post();
+        });
+}
+
+void Index::downloadSource(IndexSource& src) {
+    IndexUpdateEvent(src.repository, UpdateProgress(0, "Beginning download")).post();
+
+    auto targetFile = dirs::getIndexDir() / fmt::format("{}.zip", src.dirname());
+
+    web::AsyncWebRequest()
+        .join(fmt::format("index-download-{}", src.repository))
+        .fetch(fmt::format("https://github.com/{}/zipball/main", src.repository))
+        .into(targetFile)
+        .then([this, &src, targetFile](auto) {
+            auto targetDir = dirs::getIndexDir() / src.dirname();
+            // delete old unzipped index
+            try {
+                if (ghc::filesystem::exists(targetDir)) {
+                    ghc::filesystem::remove_all(targetDir);
+                }
+            }
+            catch(...) {
+                return IndexUpdateEvent(
+                    src.repository,
+                    UpdateError("Unable to clear cached index")
+                ).post();
+            }
+
+            // unzip new index
+            auto unzip = file::Unzip::intoDir(targetFile, targetDir, true);
+            if (!unzip) {
+                return IndexUpdateEvent(
+                    src.repository,
+                    UpdateError("Unable to unzip new index")
+                ).post();
+            }
+
+            // update index
+            this->updateSourceFromLocal(src);
+        })
+        .expect([&src](std::string const& err) {
+            IndexUpdateEvent(
+                src.repository,
+                UpdateError(fmt::format("Error downloading: {}", err))
+            ).post();
+        })
+        .progress([&src](auto&, double now, double total) {
+            IndexUpdateEvent(
+                src.repository,
+                UpdateProgress(static_cast<uint8_t>(now / total * 100.0), "Downloading")
+            ).post();
+        });
+}
+
+void Index::updateSourceFromLocal(IndexSource& src) {
+    IndexUpdateEvent(src.repository, UpdateProgress(100, "Updating local cache")).post();
+    // delete old items from this url if such exist
+    for (auto& [_, versions] : m_items) {
+        for (auto it = versions.begin(); it != versions.end(); ) {
+            if (it->second.sourceRepository == src.repository) {
+                it = versions.erase(it);
+            } else {
+                ++it;
+            }
+        }
+    }
+
+    // todo: add shit
+
+    this->cleanupItems();
+    src.isUpToDate = true;
+    IndexUpdateEvent(src.repository, UpdateFinished()).post();
+}
+
+void Index::cleanupItems() {
+    // delete mods with no versions
+    for (auto it = m_items.begin(); it != m_items.end(); ) {
+        if (!it->second.size()) {
+            it = m_items.erase(it);
+        } else {
+            ++it;
+        }
+    }
+}
+
+void Index::update(bool force) {
+    // create index dir if it doesn't exist
+    (void)file::createDirectoryAll(dirs::getIndexDir());
+
+    // update all sources in GD thread
+    Loader::get()->queueInGDThread([force, this]() {
+        for (auto& src : m_sources) {
+            if (force) {
+                this->downloadSource(src);
+            } else {
+                this->checkSourceUpdates(src);
+            }
+        }
+    });
+}
+
+std::vector<IndexItem> Index::getItems() const {
+    std::vector<IndexItem> res;
+    for (auto& items : map::values(m_items)) {
+        if (items.size()) {
+            res.push_back(items.rbegin()->second);
+        }
+    }
+    return res;
+}
+
+bool Index::isKnownItem(
+    std::string const& id,
+    std::optional<size_t> version
+) const {
+    if (m_items.count(id)) {
+        if (version) {
+            return m_items.at(id).count(version.value());
+        } else {
+            return true;
+        }
+    } else {
+        return false;
+    }
+}
+
+std::optional<IndexItem> Index::getItem(
+    std::string const& id,
+    std::optional<size_t> version
+) const {
+    if (m_items.count(id)) {
+        auto versions = m_items.at(id);
+        if (version) {
+            if (versions.count(version.value())) {
+                return versions.at(version.value());
+            }
+        } else {
+            if (versions.size()) {
+                return m_items.at(id).rbegin()->second;
+            }
+        }
+    }
+    return std::nullopt;
+}
diff --git a/loader/src/loader/Loader.cpp b/loader/src/loader/Loader.cpp
index 90da5472..3eed862a 100644
--- a/loader/src/loader/Loader.cpp
+++ b/loader/src/loader/Loader.cpp
@@ -275,7 +275,7 @@ Mod* Loader::getLoadedMod(std::string const& id) const {
 }
 
 std::vector<Mod*> Loader::getAllMods() {
-    return map::getValues(m_mods);
+    return map::values(m_mods);
 }
 
 Mod* Loader::getInternalMod() {
diff --git a/loader/src/ui/internal/GeodeUI.cpp b/loader/src/ui/internal/GeodeUI.cpp
index 78dcacb9..8a61232c 100644
--- a/loader/src/ui/internal/GeodeUI.cpp
+++ b/loader/src/ui/internal/GeodeUI.cpp
@@ -1,4 +1,5 @@
-#include "../index/Index.hpp"
+
+#include <Geode/loader/Index.hpp>
 #include "info/ModInfoLayer.hpp"
 #include "list/ModListLayer.hpp"
 #include "settings/ModSettingsPopup.hpp"
@@ -15,8 +16,9 @@ void geode::openInfoPopup(Mod* mod) {
 
 void geode::openIndexPopup(Mod* mod) {
     if (Index::get()->isKnownItem(mod->getID())) {
-        ModInfoLayer::create(new ModObject(Index::get()->getKnownItem(mod->getID())), nullptr)
-            ->show();
+        ModInfoLayer::create(
+            new ModObject(Index::get()->getKnownItem(mod->getID()))
+        )->show();
     }
 }
 
diff --git a/loader/src/ui/internal/info/ModInfoLayer.hpp b/loader/src/ui/internal/info/ModInfoLayer.hpp
index 10056612..996b0a28 100644
--- a/loader/src/ui/internal/info/ModInfoLayer.hpp
+++ b/loader/src/ui/internal/info/ModInfoLayer.hpp
@@ -4,7 +4,7 @@
 #include <Geode/binding/FLAlertLayerProtocol.hpp>
 #include <Geode/ui/MDTextArea.hpp>
 #include <Geode/ui/Scrollbar.hpp>
-#include <Index.hpp>
+#include <Geode/loader/Index.hpp>
 
 USE_GEODE_NAMESPACE();
 
diff --git a/loader/src/ui/internal/list/ModListLayer.hpp b/loader/src/ui/internal/list/ModListLayer.hpp
index e31243c2..233806a1 100644
--- a/loader/src/ui/internal/list/ModListLayer.hpp
+++ b/loader/src/ui/internal/list/ModListLayer.hpp
@@ -3,7 +3,7 @@
 #include "ModListView.hpp"
 
 #include <Geode/binding/TextInputDelegate.hpp>
-#include <Index.hpp>
+#include <Geode/loader/Index.hpp>
 
 USE_GEODE_NAMESPACE();
 
diff --git a/loader/src/ui/internal/list/ModListView.hpp b/loader/src/ui/internal/list/ModListView.hpp
index 129d6ef2..0813078f 100644
--- a/loader/src/ui/internal/list/ModListView.hpp
+++ b/loader/src/ui/internal/list/ModListView.hpp
@@ -3,7 +3,8 @@
 #include <Geode/binding/CustomListView.hpp>
 #include <Geode/binding/FLAlertLayerProtocol.hpp>
 #include <Geode/binding/TableViewCell.hpp>
-#include <Index.hpp>
+#include <Geode/loader/Index.hpp>
+#include <Geode/loader/Loader.hpp>
 #include <optional>
 
 USE_GEODE_NAMESPACE();
@@ -18,7 +19,7 @@ enum class ModListType {
 
 enum class ModObjectType {
     Mod,
-    Unloaded,
+    Invalid,
     Index,
 };
 
@@ -27,22 +28,25 @@ class ModListLayer;
 // Wrapper so you can pass Mods in a CCArray
 struct ModObject : public CCObject {
     ModObjectType m_type;
-    Mod* m_mod;
-    InvalidGeodeFile m_info;
-    IndexItem m_index;
+    std::variant<Mod*, InvalidGeodeFile, IndexItem> m_data;
 
-    inline ModObject(Mod* mod) : m_mod(mod), m_type(ModObjectType::Mod) {
+    inline ModObject(Mod* mod)
+      : m_data(mod), m_type(ModObjectType::Mod)
+    {
         this->autorelease();
-    };
+    }
 
-    inline ModObject(InvalidGeodeFile const& info) :
-        m_info(info), m_type(ModObjectType::Unloaded) {
+    inline ModObject(InvalidGeodeFile const& info)
+      : m_data(info), m_type(ModObjectType::Invalid)
+    {
         this->autorelease();
-    };
+    }
 
-    inline ModObject(IndexItem const& index) : m_index(index), m_type(ModObjectType::Index) {
+    inline ModObject(IndexItem const& index)
+      : m_data(index), m_type(ModObjectType::Index)
+    {
         this->autorelease();
-    };
+    }
 };
 
 class ModListView;
diff --git a/loader/src/utils/PlatformID.cpp b/loader/src/utils/PlatformID.cpp
new file mode 100644
index 00000000..45714ed7
--- /dev/null
+++ b/loader/src/utils/PlatformID.cpp
@@ -0,0 +1,22 @@
+
+#include <Geode/platform/platform.hpp>
+#include <Geode/utils/general.hpp>
+
+USE_GEODE_NAMESPACE();
+
+PlatformID PlatformID::from(const char* str) {
+    switch (hash(str)) {
+        default:
+        case hash("unknown"): return PlatformID::Unknown;
+        case hash("windows"): return PlatformID::Windows;
+        case hash("macos"): return PlatformID::MacOS;
+        case hash("ios"): return PlatformID::iOS;
+        case hash("android"): return PlatformID::Android;
+        case hash("linux"): return PlatformID::Linux;
+    }
+}
+
+PlatformID PlatformID::from(std::string const& str) {
+    return PlatformID::from(str.c_str());
+}
+
diff --git a/loader/src/utils/file.cpp b/loader/src/utils/file.cpp
index 03c0a237..f8306afa 100644
--- a/loader/src/utils/file.cpp
+++ b/loader/src/utils/file.cpp
@@ -116,11 +116,6 @@ Result<std::vector<std::string>> utils::file::listFilesRecursively(std::string c
     return Ok(res);
 }
 
-Result<> utils::file::unzipTo(ghc::filesystem::path const& from, ghc::filesystem::path const& to) {
-    GEODE_UNWRAP_INTO(auto unzip, Unzip::create(from));
-    return unzip.extractAllTo(to);
-}
-
 static constexpr auto MAX_ENTRY_PATH_LEN = 256;
 
 struct ZipEntry {
@@ -244,7 +239,7 @@ ghc::filesystem::path Unzip::getPath() const {
 }
 
 std::vector<ghc::filesystem::path> Unzip::getEntries() const {
-    return map::getKeys(m_impl->entries());
+    return map::keys(m_impl->entries());
 }
 
 bool Unzip::hasEntry(Path const& name) {
@@ -268,3 +263,16 @@ Result<> Unzip::extractAllTo(Path const& dir) {
     }
     return Ok();
 }
+
+Result<> Unzip::intoDir(
+    Path const& from,
+    Path const& to,
+    bool deleteZipAfter
+) {
+    GEODE_UNWRAP_INTO(auto unzip, Unzip::create(from));
+    GEODE_UNWRAP(unzip.extractAllTo(to));
+    if (deleteZipAfter) {
+        try { ghc::filesystem::remove(from); } catch(...) {}
+    }
+    return Ok();
+}