qlaunch improvements :)

src/core/CMakeLists.txt

@@ -1131,6 +1131,8 @@ add_library(core STATIC
     internal_network/sockets.h
     internal_network/wifi_scanner.cpp
     internal_network/wifi_scanner.h
+    launch_timestamp_cache.cpp
+    launch_timestamp_cache.h
     loader/deconstructed_rom_directory.cpp
     loader/deconstructed_rom_directory.h
     loader/kip.cpp

src/core/core.cpp

@@ -15,6 +15,8 @@
 #include "common/string_util.h"
 #include "core/arm/exclusive_monitor.h"
 #include "core/core.h"
+
+#include "launch_timestamp_cache.h"
 #include "core/core_timing.h"
 #include "core/cpu_manager.h"
 #include "core/debugger/debugger.h"
@@ -331,6 +333,9 @@ struct System::Impl {
 
         LOG_INFO(Core, "Loading {} ({:016X}) ...", name, params.program_id);
 
+        // Track launch time for frontend launches
+        LaunchTimestampCache::SaveLaunchTimestamp(params.program_id);
+
         // Make the process created be the application
         kernel.MakeApplicationProcess(process->GetHandle());
 

src/core/hle/service/am/service/application_creator.cpp

@@ -15,6 +15,7 @@
 #include "core/hle/service/am/window_system.h"
 #include "core/hle/service/cmif_serialization.h"
 #include "core/loader/loader.h"
+#include "core/launch_timestamp_cache.h"
 
 namespace Service::AM {
 
@@ -72,6 +73,7 @@ IApplicationCreator::~IApplicationCreator() = default;
 Result IApplicationCreator::CreateApplication(
     Out<SharedPointer<IApplicationAccessor>> out_application_accessor, u64 application_id) {
     LOG_INFO(Service_NS, "called, application_id={:016X}", application_id);
+    Core::LaunchTimestampCache::SaveLaunchTimestamp(application_id);
     R_RETURN(
         CreateGuestApplication(out_application_accessor, system, m_window_system, application_id));
 }
@@ -103,6 +105,7 @@ Result IApplicationCreator::CreateSystemApplication(
 
     *out_application_accessor =
         std::make_shared<IApplicationAccessor>(system, applet, m_window_system);
+    Core::LaunchTimestampCache::SaveLaunchTimestamp(application_id);
     R_SUCCEED();
 }
 

src/core/hle/service/ns/application_manager_interface.cpp

@@ -16,6 +16,10 @@
 #include "core/hle/service/ns/read_only_application_control_data_interface.h"
 #include "core/file_sys/patch_manager.h"
 #include "frontend_common/firmware_manager.h"
+#include "core/launch_timestamp_cache.h"
+
+#include <algorithm>
+#include <vector>
 
 namespace Service::NS {
 
@@ -560,33 +564,42 @@ Result IApplicationManagerInterface::ListApplicationRecord(
     s32 offset) {
     const auto limit = out_records.size();
 
-    LOG_WARNING(Service_NS, "(STUBBED) called");
+    LOG_DEBUG(Service_NS, "called");
     const auto& cache = system.GetContentProviderUnion();
     const auto installed_games = cache.ListEntriesFilterOrigin(
         std::nullopt, FileSys::TitleType::Application, FileSys::ContentRecordType::Program);
 
-    size_t i = 0;
-    u8 ii = 24;
+    std::vector<ApplicationRecord> records;
+    records.reserve(installed_games.size());
 
     for (const auto& [slot, game] : installed_games) {
-        if (i >= limit) {
-            break;
-        }
          if (game.title_id == 0 || game.title_id < 0x0100000000001FFFull) {
              continue;
          }
-        if (offset > 0) {
-            offset--;
-            continue;
+         if ((game.title_id & 0xFFF) != 0) {
+             continue; // skip sub-programs (e.g., 001)
          }
 
          ApplicationRecord record{};
          record.application_id = game.title_id;
-        record.type = ApplicationRecordType::Installed;
-        record.unknown = 0; // 2 = needs update
-        record.unknown2 = ii++;
+         record.last_event = ApplicationEvent::Installed;
+         record.attributes = 0;
+         record.last_updated = Core::LaunchTimestampCache::GetLaunchTimestamp(game.title_id);
+
+         records.push_back(record);
+     }
 
-        out_records[i++] = record;
+     std::sort(records.begin(), records.end(), [](const ApplicationRecord& lhs, const ApplicationRecord& rhs) {
+         if (lhs.last_updated == rhs.last_updated) {
+             return lhs.application_id < rhs.application_id;
+         }
+         return lhs.last_updated > rhs.last_updated;
+     });
+
+    size_t i = 0;
+    const size_t start = static_cast<size_t>(std::max(0, offset));
+    for (size_t idx = start; idx < records.size() && i < limit; ++idx) {
+        out_records[i++] = records[idx];
     }
 
     *out_count = static_cast<s32>(i);

src/core/hle/service/ns/ns_types.h

@@ -12,7 +12,7 @@
 
 namespace Service::NS {
 
-enum class ApplicationRecordType : u8 {
+enum class ApplicationEvent : u8 {
     Installing = 2,
     Installed = 3,
     GameCardNotInserted = 5,
@@ -34,11 +34,10 @@ enum class BackgroundNetworkUpdateState : u8 {
 
 struct ApplicationRecord {
     u64 application_id;
-    ApplicationRecordType type;
-    u8 unknown;
+    ApplicationEvent last_event;
+    u8 attributes;
     INSERT_PADDING_BYTES_NOINIT(0x6);
-    u8 unknown2;
-    INSERT_PADDING_BYTES_NOINIT(0x7);
+    s64 last_updated;
 };
 static_assert(sizeof(ApplicationRecord) == 0x18, "ApplicationRecord has incorrect size.");
 

src/core/launch_timestamp_cache.cpp

@@ -0,0 +1,135 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "core/launch_timestamp_cache.h"
+
+#include <filesystem>
+#include <fstream>
+#include <mutex>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+
+#include <fmt/format.h>
+#include <nlohmann/json.hpp>
+
+#include "common/fs/fs.h"
+#include "common/fs/file.h"
+#include "common/fs/path_util.h"
+#include "common/logging/log.h"
+
+namespace Core::LaunchTimestampCache {
+namespace {
+
+using CacheMap = std::unordered_map<u64, s64>;
+
+std::mutex mutex;
+CacheMap cache;
+bool loaded = false;
+
+std::filesystem::path GetCachePath() {
+    return Common::FS::GetEdenPath(Common::FS::EdenPath::CacheDir) / "launched.json";
+}
+
+std::optional<std::string> ReadFileToString(const std::filesystem::path& path) {
+    const std::ifstream file{path, std::ios::in | std::ios::binary};
+    if (!file) {
+        return std::nullopt;
+    }
+    std::ostringstream ss;
+    ss << file.rdbuf();
+    return ss.str();
+}
+
+bool WriteStringToFile(const std::filesystem::path& path, const std::string& data) {
+    if (!Common::FS::CreateParentDirs(path)) {
+        return false;
+    }
+    std::ofstream file{path, std::ios::out | std::ios::binary | std::ios::trunc};
+    if (!file) {
+        return false;
+    }
+    file.write(data.data(), static_cast<std::streamsize>(data.size()));
+    return static_cast<bool>(file);
+}
+
+void Load() {
+    if (loaded) {
+        return;
+    }
+
+    loaded = true;
+
+    const auto path = GetCachePath();
+    if (!std::filesystem::exists(path)) {
+        return;
+    }
+
+    const auto data = ReadFileToString(path);
+    if (!data) {
+        LOG_WARNING(Core, "Failed to read launch timestamp cache: {}",
+                    Common::FS::PathToUTF8String(path));
+        return;
+    }
+
+    try {
+        const auto json = nlohmann::json::parse(data->data(), data->data() + data->size());
+        if (!json.is_object()) {
+            return;
+        }
+        for (auto it = json.begin(); it != json.end(); ++it) {
+            const auto key_str = it.key();
+            const auto value = it.value();
+            u64 key{};
+            try {
+                key = std::stoull(key_str, nullptr, 16);
+            } catch (...) {
+                continue;
+            }
+            if (value.is_number_integer()) {
+                cache[key] = value.get<s64>();
+            }
+        }
+    } catch (const std::exception& e) {
+        LOG_WARNING(Core, "Failed to parse launch timestamp cache");
+    }
+}
+
+void Save() {
+    nlohmann::json json = nlohmann::json::object();
+    for (const auto& [key, value] : cache) {
+        json[fmt::format("{:016X}", key)] = value;
+    }
+
+    const auto path = GetCachePath();
+    if (!WriteStringToFile(path, json.dump(4))) {
+        LOG_WARNING(Core, "Failed to write launch timestamp cache: {}",
+                    Common::FS::PathToUTF8String(path));
+    }
+}
+
+s64 NowSeconds() {
+    return std::time(nullptr);
+}
+
+} // namespace
+
+void SaveLaunchTimestamp(u64 title_id) {
+    std::scoped_lock lk{mutex};
+    Load();
+    cache[title_id] = NowSeconds();
+    Save();
+}
+
+s64 GetLaunchTimestamp(u64 title_id) {
+    std::scoped_lock lk{mutex};
+    Load();
+    const auto it = cache.find(title_id);
+    if (it != cache.end()) {
+        return it->second;
+    }
+    // we need a timestamp, i decided on 01/01/2026 00:00
+    return 1767225600;
+}
+
+} // namespace Core::LaunchTimestampCache

src/core/launch_timestamp_cache.h

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Core::LaunchTimestampCache {
+
+void SaveLaunchTimestamp(u64 title_id);
+s64 GetLaunchTimestamp(u64 title_id);
+
+} // namespace Core::LaunchTimestampCache

src/yuzu/game_list_worker.cpp

@@ -400,6 +400,11 @@ void GameListWorker::ScanFileSystem(ScanTarget target, const std::string& dir_pa
                 if (res2 == Loader::ResultStatus::Success && program_ids.size() > 1 &&
                     (file_type == Loader::FileType::XCI || file_type == Loader::FileType::NSP)) {
                     for (const auto id : program_ids) {
+                        // dravee suggested this, only viable way to
+                        // not show sub-games in qlaunch for now.
+                        if ((id & 0xFFF) != 0) {
+                            continue;
+                        }
                         loader = Loader::GetLoader(system, file, id);
                         if (!loader) {
                             continue;