diff --git a/main/agent/agent_loop.c b/main/agent/agent_loop.c
index 7e5eae6..7ce5d36 100644
--- a/main/agent/agent_loop.c
+++ b/main/agent/agent_loop.c
@@ -172,13 +172,12 @@ static void agent_loop_task(void *arg)
 {
     ESP_LOGI(TAG, "Agent loop started on core %d", xPortGetCoreID());
 
-    /* Allocate large buffers from PSRAM */
-    char *system_prompt = heap_caps_calloc(1, MIMI_CONTEXT_BUF_SIZE, MALLOC_CAP_SPIRAM);
-    char *history_json = heap_caps_calloc(1, MIMI_LLM_STREAM_BUF_SIZE, MALLOC_CAP_SPIRAM);
-    char *tool_output = heap_caps_calloc(1, TOOL_OUTPUT_SIZE, MALLOC_CAP_SPIRAM);
+    char *system_prompt = calloc(1, MIMI_CONTEXT_BUF_SIZE);
+    char *history_json = calloc(1, MIMI_LLM_STREAM_BUF_SIZE);
+    char *tool_output = calloc(1, TOOL_OUTPUT_SIZE);
 
     if (!system_prompt || !history_json || !tool_output) {
-        ESP_LOGE(TAG, "Failed to allocate PSRAM buffers");
+        ESP_LOGE(TAG, "Failed to allocate runtime buffers");
         vTaskDelete(NULL);
         return;
     }
@@ -318,8 +317,8 @@ static void agent_loop_task(void *arg)
         free(msg.content);
 
         /* Log memory status */
-        ESP_LOGI(TAG, "Free PSRAM: %d bytes",
-                 (int)heap_caps_get_free_size(MALLOC_CAP_SPIRAM));
+        ESP_LOGI(TAG, "Free internal heap: %d bytes",
+                 (int)heap_caps_get_free_size(MALLOC_CAP_INTERNAL));
     }
 }
 
diff --git a/main/cli/serial_cli.c b/main/cli/serial_cli.c
index d2315c4..6758bd1 100644
--- a/main/cli/serial_cli.c
+++ b/main/cli/serial_cli.c
@@ -195,8 +195,6 @@ static int cmd_heap_info(int argc, char **argv)
 {
     printf("Internal free: %d bytes\n",
            (int)heap_caps_get_free_size(MALLOC_CAP_INTERNAL));
-    printf("PSRAM free:    %d bytes\n",
-           (int)heap_caps_get_free_size(MALLOC_CAP_SPIRAM));
     printf("Total free:    %d bytes\n",
            (int)esp_get_free_heap_size());
     return 0;
diff --git a/main/llm/llm_proxy.c b/main/llm/llm_proxy.c
index dba2961..86febc6 100644
--- a/main/llm/llm_proxy.c
+++ b/main/llm/llm_proxy.c
@@ -7,7 +7,6 @@
 #include "esp_log.h"
 #include "esp_http_client.h"
 #include "esp_crt_bundle.h"
-#include "esp_heap_caps.h"
 #include "nvs.h"
 #include "cJSON.h"
 
@@ -91,7 +90,7 @@ typedef struct {
 
 static esp_err_t resp_buf_init(resp_buf_t *rb, size_t initial_cap)
 {
-    rb->data = heap_caps_calloc(1, initial_cap, MALLOC_CAP_SPIRAM);
+    rb->data = calloc(1, initial_cap);
     if (!rb->data) return ESP_ERR_NO_MEM;
     rb->len = 0;
     rb->cap = initial_cap;
@@ -102,7 +101,7 @@ static esp_err_t resp_buf_append(resp_buf_t *rb, const char *data, size_t len)
 {
     while (rb->len + len >= rb->cap) {
         size_t new_cap = rb->cap * 2;
-        char *tmp = heap_caps_realloc(rb->data, new_cap, MALLOC_CAP_SPIRAM);
+        char *tmp = realloc(rb->data, new_cap);
         if (!tmp) return ESP_ERR_NO_MEM;
         rb->data = tmp;
         rb->cap = new_cap;
diff --git a/main/mimi.c b/main/mimi.c
index 2bded17..65151b3 100644
--- a/main/mimi.c
+++ b/main/mimi.c
@@ -108,8 +108,6 @@ void app_main(void)
     /* Print memory info */
     ESP_LOGI(TAG, "Internal free: %d bytes",
              (int)heap_caps_get_free_size(MALLOC_CAP_INTERNAL));
-    ESP_LOGI(TAG, "PSRAM free:    %d bytes",
-             (int)heap_caps_get_free_size(MALLOC_CAP_SPIRAM));
 
     /* Input */
     button_Init();
diff --git a/main/tools/tool_web_search.c b/main/tools/tool_web_search.c
index d1b8ecf..4daaa34 100644
--- a/main/tools/tool_web_search.c
+++ b/main/tools/tool_web_search.c
@@ -7,7 +7,6 @@
 #include "esp_log.h"
 #include "esp_http_client.h"
 #include "esp_crt_bundle.h"
-#include "esp_heap_caps.h"
 #include "nvs.h"
 #include "cJSON.h"
 
@@ -256,9 +255,8 @@ esp_err_t tool_web_search_execute(const char *input_json, char *output, size_t o
     snprintf(path, sizeof(path),
              "/res/v1/web/search?q=%s&count=%d", encoded_query, SEARCH_RESULT_COUNT);
 
-    /* Allocate response buffer from PSRAM */
     search_buf_t sb = {0};
-    sb.data = heap_caps_calloc(1, SEARCH_BUF_SIZE, MALLOC_CAP_SPIRAM);
+    sb.data = calloc(1, SEARCH_BUF_SIZE);
     if (!sb.data) {
         snprintf(output, output_size, "Error: Out of memory");
         return ESP_ERR_NO_MEM;