diff --git a/application/basic_demo/fatfs_image/lua/coroutine_demo.lua b/application/basic_demo/fatfs_image/lua/coroutine_demo.lua
deleted file mode 100644
index ec0464f..0000000
--- a/application/basic_demo/fatfs_image/lua/coroutine_demo.lua
+++ /dev/null
@@ -1,47 +0,0 @@
-local delay = require("delay")
-
-print("[coroutine_demo] start")
-
-local co = coroutine.create(function(name)
-    print("[coroutine_demo] worker enter: " .. tostring(name))
-
-    for step = 1, 3 do
-        print(string.format("[coroutine_demo] worker step=%d before yield", step))
-        coroutine.yield("yield@" .. tostring(step))
-        print(string.format("[coroutine_demo] worker step=%d after resume", step))
-        delay.delay_ms(100)
-    end
-
-    return "done:" .. tostring(name)
-end)
-
-print("[coroutine_demo] initial status: " .. coroutine.status(co))
-
-local ok, value = coroutine.resume(co, "demo-task")
-print(string.format("[coroutine_demo] resume #1 ok=%s value=%s status=%s",
-    tostring(ok), tostring(value), coroutine.status(co)))
-
-ok, value = coroutine.resume(co)
-print(string.format("[coroutine_demo] resume #2 ok=%s value=%s status=%s",
-    tostring(ok), tostring(value), coroutine.status(co)))
-
-ok, value = coroutine.resume(co)
-print(string.format("[coroutine_demo] resume #3 ok=%s value=%s status=%s",
-    tostring(ok), tostring(value), coroutine.status(co)))
-
-ok, value = coroutine.resume(co)
-print(string.format("[coroutine_demo] resume #4 ok=%s value=%s status=%s",
-    tostring(ok), tostring(value), coroutine.status(co)))
-
-local wrapped = coroutine.wrap(function()
-    for i = 1, 2 do
-        coroutine.yield("wrap@" .. tostring(i))
-    end
-    return "wrap-done"
-end)
-
-print("[coroutine_demo] wrap call #1: " .. tostring(wrapped()))
-print("[coroutine_demo] wrap call #2: " .. tostring(wrapped()))
-print("[coroutine_demo] wrap call #3: " .. tostring(wrapped()))
-
-print("[coroutine_demo] done")
diff --git a/application/basic_demo/fatfs_image/lua/display_demo.lua b/application/basic_demo/fatfs_image/lua/display_demo.lua
index 786b8da..066d08a 100644
--- a/application/basic_demo/fatfs_image/lua/display_demo.lua
+++ b/application/basic_demo/fatfs_image/lua/display_demo.lua
@@ -34,9 +34,9 @@ if not panel_handle then
     return
 end
 
-local ok, err = pcall(display.create_screen, panel_handle, io_handle, width, height)
+local ok, err = pcall(display.init, panel_handle, io_handle, width, height)
 if not ok then
-    print("[display_demo] ERROR: create_screen failed: " .. tostring(err))
+    print("[display_demo] ERROR: init failed: " .. tostring(err))
     return
 end
 
@@ -45,7 +45,7 @@ local screen_created = true
 local function cleanup()
     if screen_created then
         pcall(display.end_frame)
-        pcall(display.destroy_screen)
+        pcall(display.deinit)
         screen_created = false
     end
 end
@@ -54,7 +54,7 @@ width = display.width()
 height = display.height()
 
 if width <= 0 or height <= 0 then
-    print("[display_demo] ERROR: invalid display size after create_screen")
+    print("[display_demo] ERROR: invalid display size after init")
     cleanup()
     return
 end
diff --git a/application/basic_demo/fatfs_image/lua/gc_demo.lua b/application/basic_demo/fatfs_image/lua/gc_demo.lua
deleted file mode 100644
index 4da00aa..0000000
--- a/application/basic_demo/fatfs_image/lua/gc_demo.lua
+++ /dev/null
@@ -1,33 +0,0 @@
-local function kb()
-    return collectgarbage("count")
-end
-
-local function print_kb(label)
-    print(string.format("[gc_demo] %s: %.2f KB", label, kb()))
-end
-
-print("[gc_demo] start")
-print_kb("initial")
-
-local blocks = {}
-for i = 1, 400 do
-    local t = {}
-    for j = 1, 64 do
-        t[j] = string.format("block=%d item=%d", i, j)
-    end
-    blocks[i] = t
-end
-
-print_kb("after allocation")
-
-blocks = nil
-print_kb("after release refs")
-
-local step_done = collectgarbage("step", 64)
-print(string.format("[gc_demo] step result: %s", tostring(step_done)))
-print_kb("after one step")
-
-collectgarbage("collect")
-print_kb("after full collect")
-
-print("[gc_demo] done")
diff --git a/application/basic_demo/fatfs_image/lua/gc_userdata_demo.lua b/application/basic_demo/fatfs_image/lua/gc_userdata_demo.lua
deleted file mode 100644
index bf68614..0000000
--- a/application/basic_demo/fatfs_image/lua/gc_userdata_demo.lua
+++ /dev/null
@@ -1,39 +0,0 @@
-local btn = require("button")
-
-local gpio_num = (args and args.gpio_num) or 0
-local rounds = (args and args.rounds) or 12
-
-print(string.format(
-    "[gc_userdata_demo] start gpio=%d rounds=%d",
-    gpio_num,
-    rounds
-))
-
-local function make_and_drop_button(index)
-    local handle, err = btn.new(gpio_num, 0)
-    if not handle then
-        error(string.format("button.new failed at round %d: %s", index, tostring(err)))
-    end
-
-    print(string.format("[gc_userdata_demo] round=%d created handle=%s", index, tostring(handle)))
-
-    -- Drop the only Lua reference on purpose. The userdata __gc should release
-    -- the native button handle so repeated creation does not exhaust BTN_MAX_HANDLES.
-    handle = nil
-    collectgarbage("collect")
-    collectgarbage("collect")
-end
-
-for i = 1, rounds do
-    make_and_drop_button(i)
-end
-
-local final_handle, final_err = btn.new(gpio_num, 0)
-if not final_handle then
-    error("[gc_userdata_demo] final create failed after GC cycling: " .. tostring(final_err))
-end
-
-print("[gc_userdata_demo] final create succeeded after repeated GC")
-btn.close(final_handle)
-collectgarbage("collect")
-print("[gc_userdata_demo] done")
diff --git a/application/basic_demo/fatfs_image/lua/lcd_touch_paint.lua b/application/basic_demo/fatfs_image/lua/lcd_touch_paint.lua
index a20f04d..b243e91 100644
--- a/application/basic_demo/fatfs_image/lua/lcd_touch_paint.lua
+++ b/application/basic_demo/fatfs_image/lua/lcd_touch_paint.lua
@@ -9,9 +9,9 @@ if not panel_handle then
     return
 end
 
-local ok, err = pcall(display.create_screen, panel_handle, io_handle, width, height)
+local ok, err = pcall(display.init, panel_handle, io_handle, width, height)
 if not ok then
-    print("[lcd_touch_paint] ERROR: create_screen failed: " .. tostring(err))
+    print("[lcd_touch_paint] ERROR: init failed: " .. tostring(err))
     return
 end
 
@@ -20,7 +20,7 @@ local screen_created = true
 local function cleanup()
     if screen_created then
         pcall(display.end_frame)
-        pcall(display.destroy_screen)
+        pcall(display.deinit)
         screen_created = false
     end
 end
@@ -29,7 +29,7 @@ width = display.width()
 height = display.height()
 
 if width <= 0 or height <= 0 then
-    print("[lcd_touch_paint] ERROR: invalid display size after create_screen")
+    print("[lcd_touch_paint] ERROR: invalid display size after init")
     cleanup()
     return
 end
diff --git a/application/basic_demo/fatfs_image/lua/random_demo_stress.lua b/application/basic_demo/fatfs_image/lua/random_demo_stress.lua
index bcf8ace..c460496 100644
--- a/application/basic_demo/fatfs_image/lua/random_demo_stress.lua
+++ b/application/basic_demo/fatfs_image/lua/random_demo_stress.lua
@@ -2,7 +2,7 @@ local delay = require("delay")
 local esp_heap = require("esp_heap")
 
 local LUA_ROOT = "/fatfs/data/lua"
-local caps = esp_heap.caps()
+local caps = esp_heap.caps
 
 local iterations = (args and args.iterations) or 20
 local pause_ms = (args and args.pause_ms) or 200
diff --git a/application/basic_demo/main/basic_demo_cli.c b/application/basic_demo/main/basic_demo_cli.c
index 246d773..9fbcf32 100644
--- a/application/basic_demo/main/basic_demo_cli.c
+++ b/application/basic_demo/main/basic_demo_cli.c
@@ -668,7 +668,7 @@ esp_err_t basic_demo_cli_start(void)
     ESP_LOGI(TAG, "Starting console REPL");
 
     repl_config.prompt = "basic_demo> ";
-    repl_config.task_stack_size = 8192;
+    repl_config.task_stack_size = 4096;
     repl_config.max_cmdline_length = 512;
 
 #if CONFIG_ESP_CONSOLE_UART_DEFAULT || CONFIG_ESP_CONSOLE_UART_CUSTOM
diff --git a/application/basic_demo/main/main.c b/application/basic_demo/main/main.c
index a355e7a..0f761b1 100644
--- a/application/basic_demo/main/main.c
+++ b/application/basic_demo/main/main.c
@@ -97,7 +97,7 @@ static void memory_monitor_task(void *arg)
         size_t psram_free = heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
         ESP_LOGI(TAG, "Memory: internal_free=%u bytes, internal_min_free=%u bytes, psram_free=%u bytes",
                  (unsigned)internal_free, (unsigned)internal_min, (unsigned)psram_free);
-        // print_task_stack_info();
+        print_task_stack_info();
     }
 }
 
@@ -131,6 +131,6 @@ void app_main(void)
 
 #if BASIC_DEMO_ENABLE_MEM_LOG
     /* Start memory monitor: print internal free, min free, PSRAM free every 20s */
-    xTaskCreate(memory_monitor_task, "mem_mon", 8192, NULL, 1, NULL);
+    xTaskCreate(memory_monitor_task, "mem_mon", 4096, NULL, 1, NULL);
 #endif
 }
diff --git a/components/claw_capabilities/cap_time/src/cap_time.c b/components/claw_capabilities/cap_time/src/cap_time.c
index 3c77710..9bd1f0a 100644
--- a/components/claw_capabilities/cap_time/src/cap_time.c
+++ b/components/claw_capabilities/cap_time/src/cap_time.c
@@ -28,7 +28,7 @@ static const char *TAG = "cap_time";
 #define CAP_TIME_MIN_VALID_EPOCH 1704067200
 #define CAP_TIME_DEFAULT_DISCONNECTED_RETRY_MS 5000
 #define CAP_TIME_DEFAULT_SYNC_RETRY_MS        30000
-#define CAP_TIME_SYNC_TASK_STACK_SIZE          6144
+#define CAP_TIME_SYNC_TASK_STACK_SIZE          4096
 #define CAP_TIME_SYNC_TASK_PRIORITY               5
 
 static const char *s_month_names[] = {
diff --git a/components/lua_modules/lua_module_display/skills/lua_module_display.md b/components/lua_modules/lua_module_display/skills/lua_module_display.md
index 3f67c72..edfa076 100644
--- a/components/lua_modules/lua_module_display/skills/lua_module_display.md
+++ b/components/lua_modules/lua_module_display/skills/lua_module_display.md
@@ -3,7 +3,7 @@
 This skill describes how to correctly use `display` when writing Lua scripts.
 
 `display` is a low-level drawing module. It can:
-- Create and destroy the LCD drawing context
+- Initialize and deinitialize the LCD drawing context
 - Draw text, lines, rectangles, circles, arcs, ellipses, triangles, and round rectangles
 - Draw raw RGB565 bitmaps
 - Draw JPEG and PNG images from memory or files
@@ -20,10 +20,10 @@ local display = require("display")
 local panel_handle, io_handle, width, height =
     board_manager.get_display_lcd_params("display_lcd")
 
-display.create_screen(panel_handle, io_handle, width, height)
+display.init(panel_handle, io_handle, width, height)
 ```
 
-After `display.create_screen(...)` succeeds:
+After `display.init(...)` succeeds:
 - `display.width()` returns the current screen width
 - `display.height()` returns the current screen height
 - Most drawing APIs can be used
@@ -32,7 +32,7 @@ When finished:
 
 ```lua
 pcall(display.end_frame)
-pcall(display.destroy_screen)
+pcall(display.deinit)
 ```
 
 ## Important rules
@@ -47,9 +47,9 @@ pcall(display.destroy_screen)
 
 ## Screen lifecycle
 
-### `display.create_screen(panel_handle, io_handle, lcd_width, lcd_height)`
+### `display.init(panel_handle, io_handle, lcd_width, lcd_height)`
 
-Creates the drawing context.
+Initializes the drawing context.
 
 - `panel_handle`: lightuserdata, usually from `board_manager.get_display_lcd_params(...)`
 - `io_handle`: lightuserdata
@@ -58,9 +58,9 @@ Creates the drawing context.
 - Returns `true` on success
 - Raises a Lua error on failure
 
-### `display.destroy_screen()`
+### `display.deinit()`
 
-Destroys the drawing context.
+Deinitializes the drawing context.
 
 - Returns `true` on success
 - Raises a Lua error on failure
@@ -390,12 +390,12 @@ Returns:
 
 For normal screen rendering:
 1. Use `board_manager.get_display_lcd_params("display_lcd")`
-2. Call `display.create_screen(...)`
+2. Call `display.init(...)`
 3. Call `display.begin_frame(...)`
 4. Draw text, shapes, or images
 5. Call `display.present()` or `display.present_rect(...)`
 6. Call `display.end_frame()`
-7. Call `display.destroy_screen()` before exit
+7. Call `display.deinit()` before exit
 
 ## Example
 
@@ -406,7 +406,7 @@ local display = require("display")
 local panel_handle, io_handle, width, height =
     bm.get_display_lcd_params("display_lcd")
 
-display.create_screen(panel_handle, io_handle, width, height)
+display.init(panel_handle, io_handle, width, height)
 
 display.begin_frame({ clear = true, r = 12, g = 18, b = 28 })
 
@@ -429,5 +429,5 @@ display.draw_text_aligned(0, display.height() - 24, display.width(), 20, "frame
 
 display.present()
 display.end_frame()
-display.destroy_screen()
+display.deinit()
 ```
diff --git a/components/lua_modules/lua_module_display/src/display_hal.c b/components/lua_modules/lua_module_display/src/display_hal.c
index e841d01..f6936b5 100644
--- a/components/lua_modules/lua_module_display/src/display_hal.c
+++ b/components/lua_modules/lua_module_display/src/display_hal.c
@@ -57,6 +57,7 @@ typedef struct {
 static display_hal_state_t s_state;
 
 static void display_hal_clear_clip_locked(void);
+static esp_err_t display_hal_clear_io_callbacks_locked(void);
 static bool display_hal_flush_done_isr(esp_lcd_panel_io_handle_t panel_io,
                                        esp_lcd_panel_io_event_data_t *edata,
                                        void *user_ctx);
@@ -151,6 +152,8 @@ fail:
 esp_err_t display_hal_destroy(void)
 {
     esp_err_t ret = display_hal_lock();
+    SemaphoreHandle_t flush_done_to_delete = NULL;
+    SemaphoreHandle_t lock_to_delete = NULL;
 
     if (ret != ESP_OK) {
         return ret;
@@ -164,6 +167,14 @@ esp_err_t display_hal_destroy(void)
         }
     }
 
+    if (s_state.display_callbacks_registered) {
+        ret = display_hal_clear_io_callbacks_locked();
+        if (ret != ESP_OK) {
+            display_hal_unlock();
+            return ret;
+        }
+    }
+
     for (size_t i = 0; i < DISPLAY_HAL_FRAMEBUFFER_COUNT_MAX; ++i) {
         heap_caps_free(s_state.framebuffers[i]);
         s_state.framebuffers[i] = NULL;
@@ -173,8 +184,12 @@ esp_err_t display_hal_destroy(void)
         s_state.painter = NULL;
     }
 
+    flush_done_to_delete = s_state.display_flush_done;
+    lock_to_delete = s_state.lock;
+
     s_state.panel = NULL;
     s_state.io = NULL;
+    s_state.display_callbacks_registered = false;
     s_state.width = 0;
     s_state.height = 0;
     s_state.framebuffer_bytes = 0;
@@ -190,8 +205,18 @@ esp_err_t display_hal_destroy(void)
     s_state.clip_y = 0;
     s_state.clip_width = 0;
     s_state.clip_height = 0;
+    s_state.display_flush_done = NULL;
+    s_state.lock = NULL;
 
-    display_hal_unlock();
+    if (lock_to_delete) {
+        xSemaphoreGive(lock_to_delete);
+    }
+    if (flush_done_to_delete) {
+        vSemaphoreDelete(flush_done_to_delete);
+    }
+    if (lock_to_delete) {
+        vSemaphoreDelete(lock_to_delete);
+    }
     return ESP_OK;
 }
 
@@ -204,6 +229,21 @@ static void display_hal_clear_clip_locked(void)
     s_state.clip_height = s_state.height;
 }
 
+static esp_err_t display_hal_clear_io_callbacks_locked(void)
+{
+    const esp_lcd_panel_io_callbacks_t callbacks = {0};
+
+    if (!s_state.io) {
+        s_state.display_callbacks_registered = false;
+        return ESP_OK;
+    }
+
+    ESP_RETURN_ON_ERROR(esp_lcd_panel_io_register_event_callbacks(s_state.io, &callbacks, NULL),
+                        TAG, "clear flush callback failed");
+    s_state.display_callbacks_registered = false;
+    return ESP_OK;
+}
+
 static uint16_t *display_hal_get_draw_framebuffer_locked(void)
 {
     if (s_state.framebuffer_count == 0) {
diff --git a/components/lua_modules/lua_module_display/src/lua_module_display.c b/components/lua_modules/lua_module_display/src/lua_module_display.c
index 58173d1..7236f5b 100644
--- a/components/lua_modules/lua_module_display/src/lua_module_display.c
+++ b/components/lua_modules/lua_module_display/src/lua_module_display.c
@@ -84,7 +84,7 @@ static void *lua_display_check_lightuserdata_arg(lua_State *L, int index, const
  * Screen lifecycle
  * ---------------------------------------------------------------------- */
 
-static int lua_display_create_screen(lua_State *L)
+static int lua_display_init(lua_State *L)
 {
     esp_lcd_panel_handle_t panel_handle =
         (esp_lcd_panel_handle_t)lua_display_check_lightuserdata_arg(
@@ -97,19 +97,19 @@ static int lua_display_create_screen(lua_State *L)
 
     esp_err_t err = display_hal_create(panel_handle, io_handle, lcd_width, lcd_height);
     if (err != ESP_OK) {
-        return luaL_error(L, "display create_screen failed: %s", esp_err_to_name(err));
+        return luaL_error(L, "display init failed: %s", esp_err_to_name(err));
     }
 
     lua_pushboolean(L, 1);
     return 1;
 }
 
-static int lua_display_destroy_screen(lua_State *L)
+static int lua_display_deinit(lua_State *L)
 {
     (void)L;
     esp_err_t err = display_hal_destroy();
     if (err != ESP_OK) {
-        return luaL_error(L, "display destroy_screen failed: %s", esp_err_to_name(err));
+        return luaL_error(L, "display deinit failed: %s", esp_err_to_name(err));
     }
 
     lua_pushboolean(L, 1);
@@ -1184,10 +1184,10 @@ int luaopen_display(lua_State *L)
 {
     lua_newtable(L);
 
-    lua_pushcfunction(L, lua_display_create_screen);
-    lua_setfield(L, -2, "create_screen");
-    lua_pushcfunction(L, lua_display_destroy_screen);
-    lua_setfield(L, -2, "destroy_screen");
+    lua_pushcfunction(L, lua_display_init);
+    lua_setfield(L, -2, "init");
+    lua_pushcfunction(L, lua_display_deinit);
+    lua_setfield(L, -2, "deinit");
 
     lua_pushcfunction(L, lua_display_width);
     lua_setfield(L, -2, "width");
diff --git a/components/lua_modules/lua_module_esp_heap/lua_module_esp_heap.c b/components/lua_modules/lua_module_esp_heap/lua_module_esp_heap.c
index af3b39a..434978e 100644
--- a/components/lua_modules/lua_module_esp_heap/lua_module_esp_heap.c
+++ b/components/lua_modules/lua_module_esp_heap/lua_module_esp_heap.c
@@ -58,13 +58,6 @@ static void lua_module_esp_heap_push_caps_constants(lua_State *L)
     lua_setfield(L, -2, "RETENTION");
 }
 
-static int lua_module_esp_heap_caps(lua_State *L)
-{
-    lua_newtable(L);
-    lua_module_esp_heap_push_caps_constants(L);
-    return 1;
-}
-
 static int lua_module_esp_heap_get_info(lua_State *L)
 {
     lua_Integer caps_value = luaL_optinteger(L, 1, MALLOC_CAP_DEFAULT);
@@ -173,7 +166,6 @@ static int lua_module_esp_heap_get_current_task(lua_State *L)
 int luaopen_esp_heap(lua_State *L)
 {
     static const luaL_Reg funcs[] = {
-        {"caps", lua_module_esp_heap_caps},
         {"get_info", lua_module_esp_heap_get_info},
         {"get_task_watermarks", lua_module_esp_heap_get_task_watermarks},
         {"get_current_task", lua_module_esp_heap_get_current_task},
@@ -182,6 +174,9 @@ int luaopen_esp_heap(lua_State *L)
 
     lua_newtable(L);
     luaL_setfuncs(L, funcs, 0);
+    lua_newtable(L);
+    lua_module_esp_heap_push_caps_constants(L);
+    lua_setfield(L, -2, "caps");
     return 1;
 }
 
diff --git a/components/lua_modules/lua_module_esp_heap/skills/lua_module_esp_heap.md b/components/lua_modules/lua_module_esp_heap/skills/lua_module_esp_heap.md
index 127094a..228f5e8 100644
--- a/components/lua_modules/lua_module_esp_heap/skills/lua_module_esp_heap.md
+++ b/components/lua_modules/lua_module_esp_heap/skills/lua_module_esp_heap.md
@@ -4,7 +4,7 @@ This skill describes how to correctly use esp_heap when writing Lua scripts.
 
 ## How to call
 - Import it with `local esp_heap = require("esp_heap")`
-- Call `local caps = esp_heap.caps()` to get capability flags such as `caps.DEFAULT`, `caps.INTERNAL`, and `caps.SPIRAM`
+- Read `local caps = esp_heap.caps` to get capability flags such as `caps.DEFAULT`, `caps.INTERNAL`, and `caps.SPIRAM`
 - Call `esp_heap.get_info(caps)` to read heap statistics such as `free_size`, `allocated_size`, and `largest_free_block`
 - Call `esp_heap.get_task_watermarks()` to inspect stack high-water marks for tasks
 - Call `esp_heap.get_current_task()` to inspect the current task state
@@ -12,7 +12,7 @@ This skill describes how to correctly use esp_heap when writing Lua scripts.
 ## Example
 ```lua
 local esp_heap = require("esp_heap")
-local caps = esp_heap.caps()
+local caps = esp_heap.caps
 
 local info = esp_heap.get_info(caps.DEFAULT)
 print(info.free_size, info.largest_free_block)