chore: simplify llm serial log.

Signed-off-by: Bo <boironic@gmail.com>

main/llm/llm_proxy.c

@@ -48,20 +48,24 @@ static void llm_log_payload(const char *label, const char *payload)
         ESP_LOGI(TAG, "%s[%u]: %s", label, (unsigned)off, chunk);
     }
 #else
-    size_t shown = total > MIMI_LLM_LOG_PREVIEW_BYTES ? MIMI_LLM_LOG_PREVIEW_BYTES : total;
+    if (MIMI_LLM_LOG_PREVIEW_BYTES > 0) {
-    char preview[MIMI_LLM_LOG_PREVIEW_BYTES + 1];
+        size_t shown = total > MIMI_LLM_LOG_PREVIEW_BYTES ? MIMI_LLM_LOG_PREVIEW_BYTES : total;
-    memcpy(preview, payload, shown);
+        char preview[MIMI_LLM_LOG_PREVIEW_BYTES + 1];
-    preview[shown] = '\0';
+        memcpy(preview, payload, shown);
-    for (size_t i = 0; i < shown; i++) {
+        preview[shown] = '\0';
-        if (preview[i] == '\n' || preview[i] == '\r' || preview[i] == '\t') {
+        for (size_t i = 0; i < shown; i++) {
-            preview[i] = ' ';
+            if (preview[i] == '\n' || preview[i] == '\r' || preview[i] == '\t') {
+                preview[i] = ' ';
+            }
         }
+        ESP_LOGI(TAG, "%s (%u bytes): %s%s",
+                 label,
+                 (unsigned)total,
+                 preview,
+                 (shown < total) ? " ..." : "");
+    } else {
+        ESP_LOGI(TAG, "%s (%u bytes)", label, (unsigned)total);
     }
-    ESP_LOGI(TAG, "%s (%u bytes): %s%s",
-             label,
-             (unsigned)total,
-             preview,
-             (shown < total) ? " ..." : "");
 #endif
 }
 

main/telegram/telegram_bot.c

@@ -392,11 +392,14 @@ esp_err_t telegram_send_message(const char *chat_id, const char *text)
         free(json_str);
 
         int sent_ok = 0;
+        bool markdown_failed = false;
         if (resp) {
             const char *desc = NULL;
             sent_ok = tg_response_is_ok(resp, &desc);
             if (!sent_ok) {
-                ESP_LOGW(TAG, "Markdown send failed: %s", desc ? desc : "unknown");
+                markdown_failed = true;
+                ESP_LOGI(TAG, "Markdown rejected by Telegram for %s: %s",
+                         chat_id, desc ? desc : "unknown");
             }
         }
 
@@ -435,6 +438,9 @@ esp_err_t telegram_send_message(const char *chat_id, const char *text)
         if (!sent_ok) {
             all_ok = 0;
         } else {
+            if (markdown_failed) {
+                ESP_LOGI(TAG, "Plain-text fallback succeeded for %s", chat_id);
+            }
             ESP_LOGI(TAG, "Telegram send success to %s (%d bytes)", chat_id, (int)chunk);
         }
 

main/tools/tool_cron.c

@@ -1,5 +1,6 @@
 #include "tools/tool_cron.h"
 #include "cron/cron_service.h"
+#include "bus/message_bus.h"
 
 #include <string.h>
 #include <time.h>
@@ -45,6 +46,14 @@ esp_err_t tool_cron_add_execute(const char *input_json, char *output, size_t out
     if (channel) strncpy(job.channel, channel, sizeof(job.channel) - 1);
     if (chat_id) strncpy(job.chat_id, chat_id, sizeof(job.chat_id) - 1);
 
+    if (strcmp(job.channel, MIMI_CHAN_TELEGRAM) == 0 &&
+        (job.chat_id[0] == '\0' || strcmp(job.chat_id, "cron") == 0)) {
+        snprintf(output, output_size,
+                 "Error: cron_add with channel='telegram' requires a valid chat_id");
+        cJSON_Delete(root);
+        return ESP_ERR_INVALID_ARG;
+    }
+
     if (strcmp(schedule_type, "every") == 0) {
         job.kind = CRON_KIND_EVERY;
         cJSON *interval = cJSON_GetObjectItem(root, "interval_s");

main/tools/tool_registry.c

@@ -143,8 +143,8 @@ esp_err_t tool_registry_init(void)
             "\"interval_s\":{\"type\":\"integer\",\"description\":\"Interval in seconds (required for 'every')\"},"
             "\"at_epoch\":{\"type\":\"integer\",\"description\":\"Unix timestamp to fire at (required for 'at')\"},"
             "\"message\":{\"type\":\"string\",\"description\":\"Message to inject when the job fires, triggering an agent turn\"},"
-            "\"channel\":{\"type\":\"string\",\"description\":\"Optional reply channel (e.g. 'telegram'). Defaults to 'system'\"},"
+            "\"channel\":{\"type\":\"string\",\"description\":\"Optional reply channel (e.g. 'telegram'). If omitted, current turn channel is used when available\"},"
-            "\"chat_id\":{\"type\":\"string\",\"description\":\"Optional reply chat_id. Defaults to 'cron'\"}"
+            "\"chat_id\":{\"type\":\"string\",\"description\":\"Optional reply chat_id. Required when channel='telegram'. If omitted during a Telegram turn, current chat_id is used\"}"
             "},"
             "\"required\":[\"name\",\"schedule_type\",\"message\"]}",
         .execute = tool_cron_add_execute,