diff --git a/.gitignore b/.gitignore
index 63f5ed0..e6140c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,18 @@ main/mimi_secrets.h
 *.pyc
 *.bin
 
+# Documentation (generated)
+BUILD_TEST_GUIDE.md
+COMPILE_TEST_REPORT.md
+CURRENT_STATUS.md
+FEISHU_INTEGRATION_SUMMARY.md
+QUICK_START.md
+QWEN_INTEGRATION_PLAN.md
+QWEN_INTEGRATION_COMPLETE.md
+build_test.sh
+build_and_integrate_qwen.sh
+verify_integration.sh
+
 # Reference repos
 nanobot/
 
@@ -46,3 +58,4 @@ nanobot/
 .DS_Store
 Thumbs.db
 references/
+.venv/
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 94875bc..5f3fe1e 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -3,7 +3,8 @@ idf_component_register(
         "mimi.c"
         "bus/message_bus.c"
         "wifi/wifi_manager.c"
-        "telegram/telegram_bot.c"
+        "channels/telegram/telegram_bot.c"
+        "channels/feishu/feishu_bot.c"
         "llm/llm_proxy.c"
         "agent/agent_loop.c"
         "agent/context_builder.c"
@@ -25,5 +26,5 @@ idf_component_register(
     REQUIRES
         nvs_flash esp_wifi esp_netif esp_http_client esp_http_server
         esp_https_ota esp_event json spiffs console vfs app_update esp-tls
-        esp_timer
+        esp_timer esp_websocket_client
 )
diff --git a/main/bus/message_bus.h b/main/bus/message_bus.h
index 78d40f4..1fc2d31 100644
--- a/main/bus/message_bus.h
+++ b/main/bus/message_bus.h
@@ -6,6 +6,7 @@
 
 /* Channel identifiers */
 #define MIMI_CHAN_TELEGRAM   "telegram"
+#define MIMI_CHAN_FEISHU     "feishu"
 #define MIMI_CHAN_WEBSOCKET  "websocket"
 #define MIMI_CHAN_CLI        "cli"
 #define MIMI_CHAN_SYSTEM     "system"
@@ -13,7 +14,7 @@
 /* Message types on the bus */
 typedef struct {
     char channel[16];       /* "telegram", "websocket", "cli" */
-    char chat_id[32];       /* Telegram chat_id or WS client id */
+    char chat_id[96];       /* Telegram/Feishu chat_id, open_id, or WS client id */
     char *content;          /* Heap-allocated message text (caller must free) */
 } mimi_msg_t;
 
diff --git a/main/channels/feishu/README.md b/main/channels/feishu/README.md
new file mode 100644
index 0000000..fa95018
--- /dev/null
+++ b/main/channels/feishu/README.md
@@ -0,0 +1,85 @@
+# Feishu/Lark Bot Integration
+
+This directory contains the Feishu bot integration for MimiClaw.
+
+## Features
+
+- Send text messages to Feishu chats
+- Receive messages via webhook (HTTP event subscription)
+- Automatic message chunking (4096 chars per message)
+- Tenant access token management with auto-refresh
+- Message deduplication
+- Reply to specific messages
+- Support for both DM (p2p) and group chats
+
+## Configuration
+
+### Option 1: Build-time Configuration
+
+1. Copy the secrets template:
+```bash
+cp main/mimi_secrets.h.example main/mimi_secrets.h
+```
+
+2. Edit `main/mimi_secrets.h`:
+```c
+#define MIMI_SECRET_FEISHU_APP_ID     "cli_xxxxxxxxxxxxxx"
+#define MIMI_SECRET_FEISHU_APP_SECRET "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+```
+
+3. Rebuild:
+```bash
+idf.py fullclean && idf.py build
+```
+
+### Option 2: Runtime Configuration (CLI)
+
+```
+mimi> set_feishu_creds cli_xxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+```
+
+## Feishu App Setup
+
+1. Go to [Feishu Open Platform](https://open.feishu.cn/)
+2. Create an app and get **App ID** / **App Secret**
+3. Enable permissions:
+   - `im:message` - Send and receive messages
+   - `im:message:send_as_bot` - Send messages as bot
+4. Configure Event Subscription:
+   - Request URL: `http://<ESP32_IP>:18790/feishu/events`
+   - Subscribe to: `im.message.receive_v1`
+5. The ESP32 will auto-respond to the URL verification challenge
+
+## Architecture
+
+```
+Feishu Server
+    |
+    v  (HTTP POST /feishu/events)
+[ESP32 Webhook Server :18790]
+    |
+    v  (message_bus_push_inbound)
+[Message Bus] --> [Agent Loop] --> [Message Bus]
+    |                                    |
+    v  (outbound dispatch)               |
+[feishu_send_message] <-----------------+
+    |
+    v  (POST /im/v1/messages)
+Feishu API
+```
+
+## API Reference
+
+| Function | Description |
+|----------|-------------|
+| `feishu_bot_init()` | Load credentials from NVS/build-time |
+| `feishu_bot_start()` | Start webhook HTTP server |
+| `feishu_send_message(chat_id, text)` | Send text message |
+| `feishu_reply_message(message_id, text)` | Reply to a specific message |
+| `feishu_set_credentials(app_id, secret)` | Save credentials to NVS |
+
+## References
+
+- [Feishu Open Platform Docs](https://open.feishu.cn/document/home/index)
+- [Message API](https://open.feishu.cn/document/server-docs/im-v1/message/create)
+- [Event Subscription](https://open.feishu.cn/document/server-docs/event-subscription/event-subscription-guide)
diff --git a/main/channels/feishu/feishu_bot.c b/main/channels/feishu/feishu_bot.c
new file mode 100644
index 0000000..3f3ae3a
--- /dev/null
+++ b/main/channels/feishu/feishu_bot.c
@@ -0,0 +1,991 @@
+#include "feishu_bot.h"
+#include "mimi_config.h"
+#include "bus/message_bus.h"
+#include "proxy/http_proxy.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "esp_http_client.h"
+#include "esp_websocket_client.h"
+#include "esp_crt_bundle.h"
+#include "esp_timer.h"
+#include "esp_event.h"
+#include "nvs.h"
+#include "cJSON.h"
+
+static const char *TAG = "feishu";
+
+/* ── Feishu API endpoints ──────────────────────────────────── */
+#define FEISHU_API_BASE         "https://open.feishu.cn/open-apis"
+#define FEISHU_AUTH_URL         FEISHU_API_BASE "/auth/v3/tenant_access_token/internal"
+#define FEISHU_SEND_MSG_URL     FEISHU_API_BASE "/im/v1/messages"
+#define FEISHU_REPLY_MSG_URL    FEISHU_API_BASE "/im/v1/messages/%s/reply"
+#define FEISHU_WS_CONFIG_URL    "https://open.feishu.cn/callback/ws/endpoint"
+
+/* ── Credentials & token state ─────────────────────────────── */
+static char s_app_id[64] = MIMI_SECRET_FEISHU_APP_ID;
+static char s_app_secret[128] = MIMI_SECRET_FEISHU_APP_SECRET;
+static char s_tenant_token[512] = {0};
+static int64_t s_token_expire_time = 0;
+
+/* ── Feishu WebSocket state ────────────────────────────────── */
+static esp_websocket_client_handle_t s_ws_client = NULL;
+static TaskHandle_t s_ws_task = NULL;
+static char s_ws_url[512] = {0};
+static int s_ws_ping_interval_ms = 120000;
+static int s_ws_reconnect_interval_ms = 30000;
+static int s_ws_reconnect_nonce_ms = 30000;
+static int s_ws_service_id = 0;
+static bool s_ws_connected = false;
+
+static void handle_message_event(cJSON *event);
+
+/* ── Message deduplication ─────────────────────────────────── */
+#define FEISHU_DEDUP_CACHE_SIZE 64
+
+static uint64_t s_seen_msg_keys[FEISHU_DEDUP_CACHE_SIZE] = {0};
+static size_t s_seen_msg_idx = 0;
+
+static uint64_t fnv1a64(const char *s)
+{
+    uint64_t h = 1469598103934665603ULL;
+    if (!s) return h;
+    while (*s) {
+        h ^= (unsigned char)(*s++);
+        h *= 1099511628211ULL;
+    }
+    return h;
+}
+
+static bool dedup_check_and_record(const char *message_id)
+{
+    uint64_t key = fnv1a64(message_id);
+    for (size_t i = 0; i < FEISHU_DEDUP_CACHE_SIZE; i++) {
+        if (s_seen_msg_keys[i] == key) return true;
+    }
+    s_seen_msg_keys[s_seen_msg_idx] = key;
+    s_seen_msg_idx = (s_seen_msg_idx + 1) % FEISHU_DEDUP_CACHE_SIZE;
+    return false;
+}
+
+/* ── HTTP response accumulator ─────────────────────────────── */
+typedef struct {
+    char *buf;
+    size_t len;
+    size_t cap;
+} http_resp_t;
+
+static esp_err_t http_event_handler(esp_http_client_event_t *evt)
+{
+    http_resp_t *resp = (http_resp_t *)evt->user_data;
+    if (evt->event_id == HTTP_EVENT_ON_DATA) {
+        if (resp->len + evt->data_len >= resp->cap) {
+            size_t new_cap = resp->cap * 2;
+            if (new_cap < resp->len + evt->data_len + 1) {
+                new_cap = resp->len + evt->data_len + 1;
+            }
+            char *tmp = realloc(resp->buf, new_cap);
+            if (!tmp) return ESP_ERR_NO_MEM;
+            resp->buf = tmp;
+            resp->cap = new_cap;
+        }
+        memcpy(resp->buf + resp->len, evt->data, evt->data_len);
+        resp->len += evt->data_len;
+        resp->buf[resp->len] = '\0';
+    }
+    return ESP_OK;
+}
+
+/* ── Feishu WS frame (protobuf) ────────────────────────────── */
+typedef struct {
+    char key[32];
+    char value[128];
+} ws_header_t;
+
+typedef struct {
+    uint64_t seq_id;
+    uint64_t log_id;
+    int32_t service;
+    int32_t method;
+    ws_header_t headers[16];
+    size_t header_count;
+    const uint8_t *payload;
+    size_t payload_len;
+} ws_frame_t;
+
+static bool pb_read_varint(const uint8_t *buf, size_t len, size_t *pos, uint64_t *out)
+{
+    uint64_t v = 0;
+    int shift = 0;
+    while (*pos < len && shift <= 63) {
+        uint8_t b = buf[(*pos)++];
+        v |= ((uint64_t)(b & 0x7F)) << shift;
+        if ((b & 0x80) == 0) {
+            *out = v;
+            return true;
+        }
+        shift += 7;
+    }
+    return false;
+}
+
+static bool pb_skip_field(const uint8_t *buf, size_t len, size_t *pos, uint8_t wire_type)
+{
+    uint64_t n = 0;
+    switch (wire_type) {
+        case 0:
+            return pb_read_varint(buf, len, pos, &n);
+        case 1:
+            if (*pos + 8 > len) return false;
+            *pos += 8;
+            return true;
+        case 2:
+            if (!pb_read_varint(buf, len, pos, &n)) return false;
+            if (*pos + (size_t)n > len) return false;
+            *pos += (size_t)n;
+            return true;
+        case 5:
+            if (*pos + 4 > len) return false;
+            *pos += 4;
+            return true;
+        default:
+            return false;
+    }
+}
+
+static bool pb_parse_header_msg(const uint8_t *buf, size_t len, ws_header_t *h)
+{
+    memset(h, 0, sizeof(*h));
+    size_t pos = 0;
+    while (pos < len) {
+        uint64_t tag = 0, slen = 0;
+        if (!pb_read_varint(buf, len, &pos, &tag)) return false;
+        uint32_t field = (uint32_t)(tag >> 3);
+        uint8_t wt = (uint8_t)(tag & 0x07);
+        if (wt != 2) {
+            if (!pb_skip_field(buf, len, &pos, wt)) return false;
+            continue;
+        }
+        if (!pb_read_varint(buf, len, &pos, &slen)) return false;
+        if (pos + (size_t)slen > len) return false;
+        if (field == 1) {
+            size_t n = (slen < sizeof(h->key) - 1) ? (size_t)slen : sizeof(h->key) - 1;
+            memcpy(h->key, buf + pos, n);
+            h->key[n] = '\0';
+        } else if (field == 2) {
+            size_t n = (slen < sizeof(h->value) - 1) ? (size_t)slen : sizeof(h->value) - 1;
+            memcpy(h->value, buf + pos, n);
+            h->value[n] = '\0';
+        }
+        pos += (size_t)slen;
+    }
+    return true;
+}
+
+static bool pb_parse_frame(const uint8_t *buf, size_t len, ws_frame_t *f)
+{
+    memset(f, 0, sizeof(*f));
+    size_t pos = 0;
+    while (pos < len) {
+        uint64_t tag = 0, v = 0, blen = 0;
+        if (!pb_read_varint(buf, len, &pos, &tag)) return false;
+        uint32_t field = (uint32_t)(tag >> 3);
+        uint8_t wt = (uint8_t)(tag & 0x07);
+        if (field == 1 && wt == 0) {
+            if (!pb_read_varint(buf, len, &pos, &f->seq_id)) return false;
+        } else if (field == 2 && wt == 0) {
+            if (!pb_read_varint(buf, len, &pos, &f->log_id)) return false;
+        } else if (field == 3 && wt == 0) {
+            if (!pb_read_varint(buf, len, &pos, &v)) return false;
+            f->service = (int32_t)v;
+        } else if (field == 4 && wt == 0) {
+            if (!pb_read_varint(buf, len, &pos, &v)) return false;
+            f->method = (int32_t)v;
+        } else if (field == 5 && wt == 2) {
+            if (!pb_read_varint(buf, len, &pos, &blen)) return false;
+            if (pos + (size_t)blen > len) return false;
+            if (f->header_count < 16) {
+                pb_parse_header_msg(buf + pos, (size_t)blen, &f->headers[f->header_count++]);
+            }
+            pos += (size_t)blen;
+        } else if (field == 8 && wt == 2) {
+            if (!pb_read_varint(buf, len, &pos, &blen)) return false;
+            if (pos + (size_t)blen > len) return false;
+            f->payload = buf + pos;
+            f->payload_len = (size_t)blen;
+            pos += (size_t)blen;
+        } else {
+            if (!pb_skip_field(buf, len, &pos, wt)) return false;
+        }
+    }
+    return true;
+}
+
+static const char *frame_header_value(const ws_frame_t *f, const char *key)
+{
+    for (size_t i = 0; i < f->header_count; i++) {
+        if (strcmp(f->headers[i].key, key) == 0) {
+            return f->headers[i].value;
+        }
+    }
+    return NULL;
+}
+
+static bool pb_write_varint(uint8_t *buf, size_t cap, size_t *pos, uint64_t value)
+{
+    do {
+        if (*pos >= cap) return false;
+        uint8_t byte = (uint8_t)(value & 0x7F);
+        value >>= 7;
+        if (value) byte |= 0x80;
+        buf[(*pos)++] = byte;
+    } while (value);
+    return true;
+}
+
+static bool pb_write_tag(uint8_t *buf, size_t cap, size_t *pos, uint32_t field, uint8_t wt)
+{
+    return pb_write_varint(buf, cap, pos, ((uint64_t)field << 3) | wt);
+}
+
+static bool pb_write_bytes(uint8_t *buf, size_t cap, size_t *pos, uint32_t field, const uint8_t *data, size_t len)
+{
+    if (!pb_write_tag(buf, cap, pos, field, 2)) return false;
+    if (!pb_write_varint(buf, cap, pos, len)) return false;
+    if (*pos + len > cap) return false;
+    memcpy(buf + *pos, data, len);
+    *pos += len;
+    return true;
+}
+
+static bool pb_write_string(uint8_t *buf, size_t cap, size_t *pos, uint32_t field, const char *s)
+{
+    return pb_write_bytes(buf, cap, pos, field, (const uint8_t *)s, strlen(s));
+}
+
+static bool ws_encode_header(uint8_t *dst, size_t cap, size_t *out_len, const char *key, const char *value)
+{
+    size_t pos = 0;
+    if (!pb_write_string(dst, cap, &pos, 1, key)) return false;
+    if (!pb_write_string(dst, cap, &pos, 2, value)) return false;
+    *out_len = pos;
+    return true;
+}
+
+static int ws_send_frame(const ws_frame_t *f, const uint8_t *payload, size_t payload_len, int timeout_ms)
+{
+    uint8_t out[2048];
+    size_t pos = 0;
+    if (!pb_write_tag(out, sizeof(out), &pos, 1, 0) || !pb_write_varint(out, sizeof(out), &pos, f->seq_id)) return -1;
+    if (!pb_write_tag(out, sizeof(out), &pos, 2, 0) || !pb_write_varint(out, sizeof(out), &pos, f->log_id)) return -1;
+    if (!pb_write_tag(out, sizeof(out), &pos, 3, 0) || !pb_write_varint(out, sizeof(out), &pos, (uint32_t)f->service)) return -1;
+    if (!pb_write_tag(out, sizeof(out), &pos, 4, 0) || !pb_write_varint(out, sizeof(out), &pos, (uint32_t)f->method)) return -1;
+
+    for (size_t i = 0; i < f->header_count; i++) {
+        uint8_t hb[256];
+        size_t hlen = 0;
+        if (!ws_encode_header(hb, sizeof(hb), &hlen, f->headers[i].key, f->headers[i].value)) return -1;
+        if (!pb_write_bytes(out, sizeof(out), &pos, 5, hb, hlen)) return -1;
+    }
+    if (payload && payload_len > 0) {
+        if (!pb_write_bytes(out, sizeof(out), &pos, 8, payload, payload_len)) return -1;
+    }
+    return esp_websocket_client_send_bin(s_ws_client, (const char *)out, pos, timeout_ms);
+}
+
+/* ── Get / refresh tenant access token ─────────────────────── */
+static esp_err_t feishu_get_tenant_token(void)
+{
+    if (s_app_id[0] == '\0' || s_app_secret[0] == '\0') {
+        ESP_LOGW(TAG, "No Feishu credentials configured");
+        return ESP_ERR_INVALID_STATE;
+    }
+
+    int64_t now = esp_timer_get_time() / 1000000LL;
+    if (s_tenant_token[0] != '\0' && s_token_expire_time > now + 300) {
+        return ESP_OK;
+    }
+
+    cJSON *body = cJSON_CreateObject();
+    cJSON_AddStringToObject(body, "app_id", s_app_id);
+    cJSON_AddStringToObject(body, "app_secret", s_app_secret);
+    char *json_str = cJSON_PrintUnformatted(body);
+    cJSON_Delete(body);
+    if (!json_str) return ESP_ERR_NO_MEM;
+
+    http_resp_t resp = { .buf = calloc(1, 2048), .len = 0, .cap = 2048 };
+    if (!resp.buf) { free(json_str); return ESP_ERR_NO_MEM; }
+
+    esp_http_client_config_t config = {
+        .url = FEISHU_AUTH_URL,
+        .event_handler = http_event_handler,
+        .user_data = &resp,
+        .timeout_ms = 10000,
+        .buffer_size = 2048,
+        .buffer_size_tx = 2048,
+        .crt_bundle_attach = esp_crt_bundle_attach,
+    };
+
+    esp_http_client_handle_t client = esp_http_client_init(&config);
+    if (!client) { free(json_str); free(resp.buf); return ESP_FAIL; }
+
+    esp_http_client_set_method(client, HTTP_METHOD_POST);
+    esp_http_client_set_header(client, "Content-Type", "application/json");
+    esp_http_client_set_post_field(client, json_str, strlen(json_str));
+
+    esp_err_t err = esp_http_client_perform(client);
+    esp_http_client_cleanup(client);
+    free(json_str);
+
+    if (err != ESP_OK) {
+        ESP_LOGE(TAG, "Token request HTTP failed: %s", esp_err_to_name(err));
+        free(resp.buf);
+        return err;
+    }
+
+    cJSON *root = cJSON_Parse(resp.buf);
+    free(resp.buf);
+    if (!root) { ESP_LOGE(TAG, "Failed to parse token response"); return ESP_FAIL; }
+
+    cJSON *code = cJSON_GetObjectItem(root, "code");
+    if (!code || code->valueint != 0) {
+        ESP_LOGE(TAG, "Token request failed: code=%d", code ? code->valueint : -1);
+        cJSON_Delete(root);
+        return ESP_FAIL;
+    }
+
+    cJSON *token = cJSON_GetObjectItem(root, "tenant_access_token");
+    cJSON *expire = cJSON_GetObjectItem(root, "expire");
+
+    if (token && cJSON_IsString(token)) {
+        strncpy(s_tenant_token, token->valuestring, sizeof(s_tenant_token) - 1);
+        s_token_expire_time = now + (expire ? expire->valueint : 7200) - 300;
+        ESP_LOGI(TAG, "Got tenant access token (expires in %ds)",
+                 expire ? expire->valueint : 7200);
+    }
+
+    cJSON_Delete(root);
+    return ESP_OK;
+}
+
+/* ── Feishu API call helper ────────────────────────────────── */
+static char *feishu_api_call(const char *url, const char *method, const char *post_data)
+{
+    if (feishu_get_tenant_token() != ESP_OK) return NULL;
+
+    http_resp_t resp = { .buf = calloc(1, 4096), .len = 0, .cap = 4096 };
+    if (!resp.buf) return NULL;
+
+    esp_http_client_config_t config = {
+        .url = url,
+        .event_handler = http_event_handler,
+        .user_data = &resp,
+        .timeout_ms = 15000,
+        .buffer_size = 2048,
+        .buffer_size_tx = 2048,
+        .crt_bundle_attach = esp_crt_bundle_attach,
+    };
+
+    esp_http_client_handle_t client = esp_http_client_init(&config);
+    if (!client) { free(resp.buf); return NULL; }
+
+    char auth_header[600];
+    snprintf(auth_header, sizeof(auth_header), "Bearer %s", s_tenant_token);
+    esp_http_client_set_header(client, "Authorization", auth_header);
+    esp_http_client_set_header(client, "Content-Type", "application/json; charset=utf-8");
+
+    if (strcmp(method, "POST") == 0) {
+        esp_http_client_set_method(client, HTTP_METHOD_POST);
+        if (post_data) {
+            esp_http_client_set_post_field(client, post_data, strlen(post_data));
+        }
+    }
+
+    esp_err_t err = esp_http_client_perform(client);
+    esp_http_client_cleanup(client);
+
+    if (err != ESP_OK) {
+        ESP_LOGE(TAG, "API call failed: %s", esp_err_to_name(err));
+        free(resp.buf);
+        return NULL;
+    }
+
+    return resp.buf;
+}
+
+/* ── WS long connection ────────────────────────────────────── */
+static bool parse_query_param(const char *url, const char *key, char *out, size_t out_size)
+{
+    const char *q = strchr(url, '?');
+    if (!q) return false;
+    q++;
+    size_t key_len = strlen(key);
+    while (*q) {
+        const char *eq = strchr(q, '=');
+        if (!eq) break;
+        const char *amp = strchr(eq + 1, '&');
+        size_t name_len = (size_t)(eq - q);
+        if (name_len == key_len && strncmp(q, key, key_len) == 0) {
+            size_t val_len = amp ? (size_t)(amp - (eq + 1)) : strlen(eq + 1);
+            size_t n = (val_len < out_size - 1) ? val_len : out_size - 1;
+            memcpy(out, eq + 1, n);
+            out[n] = '\0';
+            return true;
+        }
+        if (!amp) break;
+        q = amp + 1;
+    }
+    return false;
+}
+
+static esp_err_t feishu_pull_ws_config(void)
+{
+    cJSON *body = cJSON_CreateObject();
+    cJSON_AddStringToObject(body, "AppID", s_app_id);
+    cJSON_AddStringToObject(body, "AppSecret", s_app_secret);
+    char *json_str = cJSON_PrintUnformatted(body);
+    cJSON_Delete(body);
+    if (!json_str) return ESP_ERR_NO_MEM;
+
+    http_resp_t resp = { .buf = calloc(1, 4096), .len = 0, .cap = 4096 };
+    if (!resp.buf) {
+        free(json_str);
+        return ESP_ERR_NO_MEM;
+    }
+
+    esp_http_client_config_t config = {
+        .url = FEISHU_WS_CONFIG_URL,
+        .event_handler = http_event_handler,
+        .user_data = &resp,
+        .timeout_ms = 15000,
+        .buffer_size = 2048,
+        .buffer_size_tx = 1024,
+        .crt_bundle_attach = esp_crt_bundle_attach,
+    };
+    esp_http_client_handle_t client = esp_http_client_init(&config);
+    if (!client) {
+        free(json_str);
+        free(resp.buf);
+        return ESP_FAIL;
+    }
+
+    esp_http_client_set_method(client, HTTP_METHOD_POST);
+    esp_http_client_set_header(client, "Content-Type", "application/json");
+    esp_http_client_set_header(client, "locale", "zh");
+    esp_http_client_set_post_field(client, json_str, strlen(json_str));
+    esp_err_t err = esp_http_client_perform(client);
+    int status = esp_http_client_get_status_code(client);
+    esp_http_client_cleanup(client);
+    free(json_str);
+
+    if (err != ESP_OK || status != 200) {
+        ESP_LOGE(TAG, "WS config request failed: err=%s http=%d", esp_err_to_name(err), status);
+        free(resp.buf);
+        return ESP_FAIL;
+    }
+
+    cJSON *root = cJSON_Parse(resp.buf);
+    free(resp.buf);
+    if (!root) return ESP_FAIL;
+
+    cJSON *code = cJSON_GetObjectItem(root, "code");
+    cJSON *data = cJSON_GetObjectItem(root, "data");
+    cJSON *url = data ? cJSON_GetObjectItem(data, "URL") : NULL;
+    cJSON *ccfg = data ? cJSON_GetObjectItem(data, "ClientConfig") : NULL;
+    if (!code || code->valueint != 0 || !url || !cJSON_IsString(url)) {
+        ESP_LOGE(TAG, "Invalid WS config response");
+        cJSON_Delete(root);
+        return ESP_FAIL;
+    }
+
+    strncpy(s_ws_url, url->valuestring, sizeof(s_ws_url) - 1);
+    char sid[24] = {0};
+    if (parse_query_param(s_ws_url, "service_id", sid, sizeof(sid))) {
+        s_ws_service_id = atoi(sid);
+    }
+    if (ccfg) {
+        cJSON *pi = cJSON_GetObjectItem(ccfg, "PingInterval");
+        cJSON *ri = cJSON_GetObjectItem(ccfg, "ReconnectInterval");
+        cJSON *rn = cJSON_GetObjectItem(ccfg, "ReconnectNonce");
+        if (pi && cJSON_IsNumber(pi)) s_ws_ping_interval_ms = pi->valueint * 1000;
+        if (ri && cJSON_IsNumber(ri)) s_ws_reconnect_interval_ms = ri->valueint * 1000;
+        if (rn && cJSON_IsNumber(rn)) s_ws_reconnect_nonce_ms = rn->valueint * 1000;
+    }
+    cJSON_Delete(root);
+    ESP_LOGI(TAG, "WS config ready: service_id=%d ping=%dms", s_ws_service_id, s_ws_ping_interval_ms);
+    return ESP_OK;
+}
+
+static void feishu_process_ws_event_json(const char *json, size_t len)
+{
+    cJSON *root = cJSON_ParseWithLength(json, len);
+    if (!root) return;
+    cJSON *event = cJSON_GetObjectItem(root, "event");
+    cJSON *header = cJSON_GetObjectItem(root, "header");
+    if (event && header) {
+        cJSON *event_type = cJSON_GetObjectItem(header, "event_type");
+        if (event_type && cJSON_IsString(event_type) &&
+            strcmp(event_type->valuestring, "im.message.receive_v1") == 0) {
+            handle_message_event(event);
+        }
+    } else if (event) {
+        handle_message_event(event);
+    }
+    cJSON_Delete(root);
+}
+
+static void feishu_handle_ws_frame(const uint8_t *buf, size_t len)
+{
+    ws_frame_t frame = {0};
+    if (!pb_parse_frame(buf, len, &frame)) {
+        ESP_LOGW(TAG, "WS frame parse failed");
+        return;
+    }
+
+    const char *type = frame_header_value(&frame, "type");
+    if (frame.method == 0) {
+        if (type && strcmp(type, "pong") == 0 && frame.payload && frame.payload_len > 0) {
+            cJSON *cfg = cJSON_ParseWithLength((const char *)frame.payload, frame.payload_len);
+            if (cfg) {
+                cJSON *pi = cJSON_GetObjectItem(cfg, "PingInterval");
+                if (pi && cJSON_IsNumber(pi)) s_ws_ping_interval_ms = pi->valueint * 1000;
+                cJSON_Delete(cfg);
+            }
+        }
+        return;
+    }
+    if (!type || strcmp(type, "event") != 0) return;
+    if (!frame.payload || frame.payload_len == 0) return;
+
+    int code = 200;
+    feishu_process_ws_event_json((const char *)frame.payload, frame.payload_len);
+
+    char ack[32];
+    int ack_len = snprintf(ack, sizeof(ack), "{\"code\":%d}", code);
+    ws_frame_t resp = frame;
+    ws_send_frame(&resp, (const uint8_t *)ack, (size_t)ack_len, 1000);
+}
+
+static void feishu_ws_event_handler(void *arg, esp_event_base_t base, int32_t event_id, void *event_data)
+{
+    (void)arg;
+    (void)base;
+    esp_websocket_event_data_t *e = (esp_websocket_event_data_t *)event_data;
+    static uint8_t *rx_buf = NULL;
+    static size_t rx_cap = 0;
+    if (event_id == WEBSOCKET_EVENT_CONNECTED) {
+        s_ws_connected = true;
+        ESP_LOGI(TAG, "Feishu WS connected");
+    } else if (event_id == WEBSOCKET_EVENT_DISCONNECTED) {
+        s_ws_connected = false;
+        ESP_LOGW(TAG, "Feishu WS disconnected");
+    } else if (event_id == WEBSOCKET_EVENT_DATA) {
+        if (e->op_code != WS_TRANSPORT_OPCODES_BINARY) return;
+        size_t need = e->payload_offset + e->data_len;
+        if (e->payload_offset == 0) {
+            if (rx_buf) free(rx_buf);
+            rx_cap = (e->payload_len > need) ? e->payload_len : need;
+            rx_buf = malloc(rx_cap);
+            if (!rx_buf) return;
+        } else if (!rx_buf || need > rx_cap) {
+            return;
+        }
+        memcpy(rx_buf + e->payload_offset, e->data_ptr, e->data_len);
+        if (need >= e->payload_len) {
+            feishu_handle_ws_frame(rx_buf, e->payload_len);
+            free(rx_buf);
+            rx_buf = NULL;
+            rx_cap = 0;
+        }
+    }
+}
+
+static void feishu_ws_task(void *arg)
+{
+    (void)arg;
+    while (1) {
+        if (feishu_pull_ws_config() != ESP_OK) {
+            vTaskDelay(pdMS_TO_TICKS(5000));
+            continue;
+        }
+
+        esp_websocket_client_config_t ws_cfg = {
+            .uri = s_ws_url,
+            .buffer_size = 2048,
+            .task_stack = MIMI_FEISHU_POLL_STACK,
+            .reconnect_timeout_ms = s_ws_reconnect_interval_ms,
+            .network_timeout_ms = 10000,
+            .disable_auto_reconnect = false,
+            .crt_bundle_attach = esp_crt_bundle_attach,
+        };
+
+        s_ws_client = esp_websocket_client_init(&ws_cfg);
+        if (!s_ws_client) {
+            vTaskDelay(pdMS_TO_TICKS(5000));
+            continue;
+        }
+        esp_websocket_register_events(s_ws_client, WEBSOCKET_EVENT_ANY, feishu_ws_event_handler, NULL);
+        esp_websocket_client_start(s_ws_client);
+
+        int64_t last_ping = 0;
+        while (s_ws_client) {
+            if (s_ws_connected) {
+                int64_t now = esp_timer_get_time() / 1000;
+                if (now - last_ping >= s_ws_ping_interval_ms) {
+                    ws_frame_t ping = {0};
+                    ping.seq_id = 0;
+                    ping.log_id = 0;
+                    ping.service = s_ws_service_id;
+                    ping.method = 0;
+                    ping.header_count = 1;
+                    strncpy(ping.headers[0].key, "type", sizeof(ping.headers[0].key) - 1);
+                    strncpy(ping.headers[0].value, "ping", sizeof(ping.headers[0].value) - 1);
+                    ws_send_frame(&ping, NULL, 0, 1000);
+                    last_ping = now;
+                }
+            }
+            if (!esp_websocket_client_is_connected(s_ws_client) && !s_ws_connected) {
+                break;
+            }
+            vTaskDelay(pdMS_TO_TICKS(200));
+        }
+
+        esp_websocket_client_stop(s_ws_client);
+        esp_websocket_client_destroy(s_ws_client);
+        s_ws_client = NULL;
+        s_ws_connected = false;
+        vTaskDelay(pdMS_TO_TICKS(3000));
+    }
+}
+
+/* ── Webhook event handler ─────────────────────────────────── */
+
+/*
+ * Feishu Event Callback v2 schema:
+ * {
+ *   "schema": "2.0",
+ *   "header": { "event_type": "im.message.receive_v1", "event_id": "...", ... },
+ *   "event": {
+ *     "sender": { "sender_id": { "open_id": "ou_xxx" }, "sender_type": "user" },
+ *     "message": {
+ *       "message_id": "om_xxx",
+ *       "chat_id": "oc_xxx",
+ *       "chat_type": "p2p" | "group",
+ *       "message_type": "text",
+ *       "content": "{\"text\":\"hello\"}"
+ *     }
+ *   }
+ * }
+ *
+ * URL verification challenge:
+ * { "challenge": "xxx", "token": "yyy", "type": "url_verification" }
+ */
+
+static void handle_message_event(cJSON *event)
+{
+    cJSON *message = cJSON_GetObjectItem(event, "message");
+    if (!message) return;
+
+    cJSON *message_id_j = cJSON_GetObjectItem(message, "message_id");
+    cJSON *chat_id_j    = cJSON_GetObjectItem(message, "chat_id");
+    cJSON *chat_type_j  = cJSON_GetObjectItem(message, "chat_type");
+    cJSON *msg_type_j   = cJSON_GetObjectItem(message, "message_type");
+    cJSON *content_j    = cJSON_GetObjectItem(message, "content");
+
+    if (!chat_id_j || !cJSON_IsString(chat_id_j)) return;
+    if (!content_j || !cJSON_IsString(content_j)) return;
+
+    const char *message_id = cJSON_IsString(message_id_j) ? message_id_j->valuestring : "";
+    const char *chat_id    = chat_id_j->valuestring;
+    const char *chat_type  = cJSON_IsString(chat_type_j) ? chat_type_j->valuestring : "p2p";
+    const char *msg_type   = cJSON_IsString(msg_type_j) ? msg_type_j->valuestring : "text";
+
+    /* Deduplication */
+    if (message_id[0] && dedup_check_and_record(message_id)) {
+        ESP_LOGD(TAG, "Duplicate message %s, skipping", message_id);
+        return;
+    }
+
+    /* Only handle text messages for now */
+    if (strcmp(msg_type, "text") != 0) {
+        ESP_LOGI(TAG, "Ignoring non-text message type: %s", msg_type);
+        return;
+    }
+
+    /* Parse the content JSON to extract text */
+    cJSON *content_obj = cJSON_Parse(content_j->valuestring);
+    if (!content_obj) {
+        ESP_LOGW(TAG, "Failed to parse message content JSON");
+        return;
+    }
+
+    cJSON *text_j = cJSON_GetObjectItem(content_obj, "text");
+    if (!text_j || !cJSON_IsString(text_j)) {
+        cJSON_Delete(content_obj);
+        return;
+    }
+
+    const char *text = text_j->valuestring;
+
+    /* Strip @bot mention prefix if present (Feishu adds @_user_1 for mentions) */
+    const char *cleaned = text;
+    if (strncmp(cleaned, "@_user_1 ", 9) == 0) {
+        cleaned += 9;
+    }
+    /* Skip leading whitespace */
+    while (*cleaned == ' ' || *cleaned == '\n') cleaned++;
+
+    if (cleaned[0] == '\0') {
+        cJSON_Delete(content_obj);
+        return;
+    }
+
+    /* Get sender info */
+    const char *sender_id = "";
+    cJSON *sender = cJSON_GetObjectItem(event, "sender");
+    if (sender) {
+        cJSON *sender_id_obj = cJSON_GetObjectItem(sender, "sender_id");
+        if (sender_id_obj) {
+            cJSON *open_id = cJSON_GetObjectItem(sender_id_obj, "open_id");
+            if (open_id && cJSON_IsString(open_id)) {
+                sender_id = open_id->valuestring;
+            }
+        }
+    }
+
+    ESP_LOGI(TAG, "Message from %s in %s(%s): %.60s%s",
+             sender_id, chat_id, chat_type, cleaned,
+             strlen(cleaned) > 60 ? "..." : "");
+
+    /* For p2p (DM) chats, use sender open_id as chat_id for session routing.
+     * For group chats, use the chat_id (group ID).
+     * This matches the moltbot reference pattern where DMs route by sender. */
+    const char *route_id = chat_id;
+    if (strcmp(chat_type, "p2p") == 0 && sender_id[0]) {
+        route_id = sender_id;
+    }
+
+    /* Push to inbound message bus */
+    mimi_msg_t msg = {0};
+    strncpy(msg.channel, MIMI_CHAN_FEISHU, sizeof(msg.channel) - 1);
+    strncpy(msg.chat_id, route_id, sizeof(msg.chat_id) - 1);
+    msg.content = strdup(cleaned);
+
+    if (msg.content) {
+        if (message_bus_push_inbound(&msg) != ESP_OK) {
+            ESP_LOGW(TAG, "Inbound queue full, dropping feishu message");
+            free(msg.content);
+        }
+    }
+
+    cJSON_Delete(content_obj);
+}
+
+/* Webhook mode intentionally disabled: Feishu channel runs in WebSocket mode only. */
+
+/* ── Public API ────────────────────────────────────────────── */
+
+esp_err_t feishu_bot_init(void)
+{
+    nvs_handle_t nvs;
+    if (nvs_open(MIMI_NVS_FEISHU, NVS_READONLY, &nvs) == ESP_OK) {
+        char tmp_id[64] = {0};
+        char tmp_secret[128] = {0};
+        size_t len_id = sizeof(tmp_id);
+        size_t len_secret = sizeof(tmp_secret);
+
+        if (nvs_get_str(nvs, MIMI_NVS_KEY_FEISHU_APP_ID, tmp_id, &len_id) == ESP_OK && tmp_id[0]) {
+            strncpy(s_app_id, tmp_id, sizeof(s_app_id) - 1);
+        }
+        if (nvs_get_str(nvs, MIMI_NVS_KEY_FEISHU_APP_SECRET, tmp_secret, &len_secret) == ESP_OK && tmp_secret[0]) {
+            strncpy(s_app_secret, tmp_secret, sizeof(s_app_secret) - 1);
+        }
+        nvs_close(nvs);
+    }
+
+    if (s_app_id[0] && s_app_secret[0]) {
+        ESP_LOGI(TAG, "Feishu credentials loaded (app_id=%.8s...)", s_app_id);
+    } else {
+        ESP_LOGW(TAG, "No Feishu credentials. Use CLI: set_feishu_creds <APP_ID> <APP_SECRET>");
+    }
+
+    return ESP_OK;
+}
+
+esp_err_t feishu_bot_start(void)
+{
+    if (s_app_id[0] == '\0' || s_app_secret[0] == '\0') {
+        ESP_LOGW(TAG, "Feishu not configured, skipping WebSocket start");
+        return ESP_OK;
+    }
+    if (s_ws_task) {
+        ESP_LOGW(TAG, "Feishu WebSocket task already running");
+        return ESP_OK;
+    }
+    BaseType_t ok = xTaskCreatePinnedToCore(
+        feishu_ws_task,
+        "feishu_ws",
+        MIMI_FEISHU_POLL_STACK,
+        NULL,
+        MIMI_FEISHU_POLL_PRIO,
+        &s_ws_task,
+        MIMI_FEISHU_POLL_CORE);
+    if (ok != pdPASS) {
+        s_ws_task = NULL;
+        return ESP_FAIL;
+    }
+    ESP_LOGI(TAG, "Feishu WebSocket mode enabled");
+    return ESP_OK;
+}
+
+esp_err_t feishu_send_message(const char *chat_id, const char *text)
+{
+    if (s_app_id[0] == '\0' || s_app_secret[0] == '\0') {
+        ESP_LOGW(TAG, "Cannot send: no credentials configured");
+        return ESP_ERR_INVALID_STATE;
+    }
+
+    /* Determine receive_id_type based on ID prefix */
+    const char *id_type = "chat_id";
+    if (strncmp(chat_id, "ou_", 3) == 0) {
+        id_type = "open_id";
+    }
+
+    char url[256];
+    snprintf(url, sizeof(url), "%s?receive_id_type=%s", FEISHU_SEND_MSG_URL, id_type);
+
+    size_t text_len = strlen(text);
+    size_t offset = 0;
+    int all_ok = 1;
+
+    while (offset < text_len) {
+        size_t chunk = text_len - offset;
+        if (chunk > MIMI_FEISHU_MAX_MSG_LEN) {
+            chunk = MIMI_FEISHU_MAX_MSG_LEN;
+        }
+
+        char *segment = malloc(chunk + 1);
+        if (!segment) return ESP_ERR_NO_MEM;
+        memcpy(segment, text + offset, chunk);
+        segment[chunk] = '\0';
+
+        /* Build content JSON: {"text":"..."} */
+        cJSON *content = cJSON_CreateObject();
+        cJSON_AddStringToObject(content, "text", segment);
+        char *content_str = cJSON_PrintUnformatted(content);
+        cJSON_Delete(content);
+        free(segment);
+
+        if (!content_str) { offset += chunk; all_ok = 0; continue; }
+
+        /* Build message body */
+        cJSON *body = cJSON_CreateObject();
+        cJSON_AddStringToObject(body, "receive_id", chat_id);
+        cJSON_AddStringToObject(body, "msg_type", "text");
+        cJSON_AddStringToObject(body, "content", content_str);
+        free(content_str);
+
+        char *json_str = cJSON_PrintUnformatted(body);
+        cJSON_Delete(body);
+
+        if (json_str) {
+            char *resp = feishu_api_call(url, "POST", json_str);
+            free(json_str);
+
+            if (resp) {
+                cJSON *root = cJSON_Parse(resp);
+                if (root) {
+                    cJSON *code = cJSON_GetObjectItem(root, "code");
+                    if (code && code->valueint != 0) {
+                        cJSON *msg = cJSON_GetObjectItem(root, "msg");
+                        ESP_LOGW(TAG, "Send failed: code=%d, msg=%s",
+                                 code->valueint, msg ? msg->valuestring : "unknown");
+                        all_ok = 0;
+                    } else {
+                        ESP_LOGI(TAG, "Sent to %s (%d bytes)", chat_id, (int)chunk);
+                    }
+                    cJSON_Delete(root);
+                }
+                free(resp);
+            } else {
+                ESP_LOGE(TAG, "Failed to send message chunk");
+                all_ok = 0;
+            }
+        }
+
+        offset += chunk;
+    }
+
+    return all_ok ? ESP_OK : ESP_FAIL;
+}
+
+esp_err_t feishu_reply_message(const char *message_id, const char *text)
+{
+    if (s_app_id[0] == '\0' || s_app_secret[0] == '\0') {
+        return ESP_ERR_INVALID_STATE;
+    }
+
+    char url[256];
+    snprintf(url, sizeof(url), FEISHU_REPLY_MSG_URL, message_id);
+
+    cJSON *content = cJSON_CreateObject();
+    cJSON_AddStringToObject(content, "text", text);
+    char *content_str = cJSON_PrintUnformatted(content);
+    cJSON_Delete(content);
+    if (!content_str) return ESP_ERR_NO_MEM;
+
+    cJSON *body = cJSON_CreateObject();
+    cJSON_AddStringToObject(body, "msg_type", "text");
+    cJSON_AddStringToObject(body, "content", content_str);
+    free(content_str);
+
+    char *json_str = cJSON_PrintUnformatted(body);
+    cJSON_Delete(body);
+    if (!json_str) return ESP_ERR_NO_MEM;
+
+    char *resp = feishu_api_call(url, "POST", json_str);
+    free(json_str);
+
+    esp_err_t ret = ESP_FAIL;
+    if (resp) {
+        cJSON *root = cJSON_Parse(resp);
+        if (root) {
+            cJSON *code = cJSON_GetObjectItem(root, "code");
+            if (code && code->valueint == 0) {
+                ret = ESP_OK;
+            } else {
+                cJSON *msg = cJSON_GetObjectItem(root, "msg");
+                ESP_LOGW(TAG, "Reply failed: code=%d, msg=%s",
+                         code ? code->valueint : -1, msg ? msg->valuestring : "unknown");
+            }
+            cJSON_Delete(root);
+        }
+        free(resp);
+    }
+
+    return ret;
+}
+
+esp_err_t feishu_set_credentials(const char *app_id, const char *app_secret)
+{
+    nvs_handle_t nvs;
+    ESP_ERROR_CHECK(nvs_open(MIMI_NVS_FEISHU, NVS_READWRITE, &nvs));
+    ESP_ERROR_CHECK(nvs_set_str(nvs, MIMI_NVS_KEY_FEISHU_APP_ID, app_id));
+    ESP_ERROR_CHECK(nvs_set_str(nvs, MIMI_NVS_KEY_FEISHU_APP_SECRET, app_secret));
+    ESP_ERROR_CHECK(nvs_commit(nvs));
+    nvs_close(nvs);
+
+    strncpy(s_app_id, app_id, sizeof(s_app_id) - 1);
+    strncpy(s_app_secret, app_secret, sizeof(s_app_secret) - 1);
+
+    /* Clear cached token to force re-auth */
+    s_tenant_token[0] = '\0';
+    s_token_expire_time = 0;
+
+    ESP_LOGI(TAG, "Feishu credentials saved");
+    return ESP_OK;
+}
diff --git a/main/channels/feishu/feishu_bot.h b/main/channels/feishu/feishu_bot.h
new file mode 100644
index 0000000..aa1b672
--- /dev/null
+++ b/main/channels/feishu/feishu_bot.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "esp_err.h"
+
+/**
+ * Initialize the Feishu bot (load credentials from NVS / build-time).
+ */
+esp_err_t feishu_bot_init(void);
+
+/**
+ * Start the Feishu webhook HTTP server for receiving events.
+ * Listens on MIMI_FEISHU_WEBHOOK_PORT.
+ */
+esp_err_t feishu_bot_start(void);
+
+/**
+ * Send a text message to a Feishu chat.
+ * Automatically splits messages longer than MIMI_FEISHU_MAX_MSG_LEN chars.
+ * @param chat_id  Feishu chat ID (open_id or chat_id)
+ * @param text     Message text
+ */
+esp_err_t feishu_send_message(const char *chat_id, const char *text);
+
+/**
+ * Reply to a specific message in a Feishu chat.
+ * @param message_id  The message_id to reply to
+ * @param text        Reply text
+ */
+esp_err_t feishu_reply_message(const char *message_id, const char *text);
+
+/**
+ * Save Feishu app credentials to NVS.
+ * @param app_id     Feishu App ID
+ * @param app_secret Feishu App Secret
+ */
+esp_err_t feishu_set_credentials(const char *app_id, const char *app_secret);
diff --git a/main/telegram/telegram_bot.c b/main/channels/telegram/telegram_bot.c
similarity index 100%
rename from main/telegram/telegram_bot.c
rename to main/channels/telegram/telegram_bot.c
diff --git a/main/telegram/telegram_bot.h b/main/channels/telegram/telegram_bot.h
similarity index 100%
rename from main/telegram/telegram_bot.h
rename to main/channels/telegram/telegram_bot.h
diff --git a/main/cli/serial_cli.c b/main/cli/serial_cli.c
index 4ac76a9..49fed0a 100644
--- a/main/cli/serial_cli.c
+++ b/main/cli/serial_cli.c
@@ -1,7 +1,8 @@
 #include "serial_cli.h"
 #include "mimi_config.h"
 #include "wifi/wifi_manager.h"
-#include "telegram/telegram_bot.h"
+#include "channels/telegram/telegram_bot.h"
+#include "channels/feishu/feishu_bot.h"
 #include "llm/llm_proxy.h"
 #include "memory/memory_store.h"
 #include "memory/session_mgr.h"
@@ -72,6 +73,47 @@ static int cmd_set_tg_token(int argc, char **argv)
     return 0;
 }
 
+/* --- set_feishu_creds command --- */
+static struct {
+    struct arg_str *app_id;
+    struct arg_str *app_secret;
+    struct arg_end *end;
+} feishu_creds_args;
+
+/* --- feishu_send command --- */
+static struct {
+    struct arg_str *receive_id;
+    struct arg_str *text;
+    struct arg_end *end;
+} feishu_send_args;
+
+static int cmd_set_feishu_creds(int argc, char **argv)
+{
+    int nerrors = arg_parse(argc, argv, (void **)&feishu_creds_args);
+    if (nerrors != 0) {
+        arg_print_errors(stderr, feishu_creds_args.end, argv[0]);
+        return 1;
+    }
+    feishu_set_credentials(feishu_creds_args.app_id->sval[0],
+                          feishu_creds_args.app_secret->sval[0]);
+    printf("Feishu credentials saved.\n");
+    return 0;
+}
+
+static int cmd_feishu_send(int argc, char **argv)
+{
+    int nerrors = arg_parse(argc, argv, (void **)&feishu_send_args);
+    if (nerrors != 0) {
+        arg_print_errors(stderr, feishu_send_args.end, argv[0]);
+        return 1;
+    }
+
+    esp_err_t err = feishu_send_message(feishu_send_args.receive_id->sval[0],
+                                        feishu_send_args.text->sval[0]);
+    printf("feishu_send status: %s\n", esp_err_to_name(err));
+    return (err == ESP_OK) ? 0 : 1;
+}
+
 /* --- set_api_key command --- */
 static struct {
     struct arg_str *key;
@@ -619,6 +661,30 @@ esp_err_t serial_cli_init(void)
     };
     esp_console_cmd_register(&tg_token_cmd);
 
+    /* set_feishu_creds */
+    feishu_creds_args.app_id = arg_str1(NULL, NULL, "<app_id>", "Feishu App ID");
+    feishu_creds_args.app_secret = arg_str1(NULL, NULL, "<app_secret>", "Feishu App Secret");
+    feishu_creds_args.end = arg_end(2);
+    esp_console_cmd_t feishu_creds_cmd = {
+        .command = "set_feishu_creds",
+        .help = "Set Feishu app credentials (app_id app_secret)",
+        .func = &cmd_set_feishu_creds,
+        .argtable = &feishu_creds_args,
+    };
+    esp_console_cmd_register(&feishu_creds_cmd);
+
+    /* feishu_send */
+    feishu_send_args.receive_id = arg_str1(NULL, NULL, "<receive_id>", "Feishu open_id/chat_id");
+    feishu_send_args.text = arg_str1(NULL, NULL, "<text>", "Text message (quote if contains spaces)");
+    feishu_send_args.end = arg_end(2);
+    esp_console_cmd_t feishu_send_cmd = {
+        .command = "feishu_send",
+        .help = "Send Feishu text: feishu_send <open_id|chat_id> \"hello\"",
+        .func = &cmd_feishu_send,
+        .argtable = &feishu_send_args,
+    };
+    esp_console_cmd_register(&feishu_send_cmd);
+
     /* set_api_key */
     api_key_args.key = arg_str1(NULL, NULL, "<key>", "LLM API key");
     api_key_args.end = arg_end(1);
diff --git a/main/cron/cron_service.h b/main/cron/cron_service.h
index 3d37752..833f23c 100644
--- a/main/cron/cron_service.h
+++ b/main/cron/cron_service.h
@@ -20,7 +20,7 @@ typedef struct {
     int64_t at_epoch;      /* For AT: unix timestamp */
     char message[256];     /* Message to inject into inbound queue */
     char channel[16];      /* Reply channel (default "system") */
-    char chat_id[32];      /* Reply chat_id (default "cron") */
+    char chat_id[96];      /* Reply chat_id/open_id (default "cron") */
     int64_t last_run;      /* Last run epoch */
     int64_t next_run;      /* Next run epoch */
     bool delete_after_run; /* Remove job after firing (for AT jobs) */
diff --git a/main/idf_component.yml b/main/idf_component.yml
index 8afa67f..560da05 100644
--- a/main/idf_component.yml
+++ b/main/idf_component.yml
@@ -14,3 +14,4 @@ dependencies:
   #   # `public` flag doesn't have an effect dependencies of the `main` component.
   #   # All dependencies of `main` are public by default.
   #   public: true
+  espressif/esp_websocket_client: ^1.4.0
diff --git a/main/mimi.c b/main/mimi.c
index 2d927cc..0e8e8fa 100644
--- a/main/mimi.c
+++ b/main/mimi.c
@@ -12,7 +12,8 @@
 #include "mimi_config.h"
 #include "bus/message_bus.h"
 #include "wifi/wifi_manager.h"
-#include "telegram/telegram_bot.h"
+#include "channels/telegram/telegram_bot.h"
+#include "channels/feishu/feishu_bot.h"
 #include "llm/llm_proxy.h"
 #include "agent/agent_loop.h"
 #include "memory/memory_store.h"
@@ -78,6 +79,13 @@ static void outbound_dispatch_task(void *arg)
             } else {
                 ESP_LOGI(TAG, "Telegram send success for %s (%d bytes)", msg.chat_id, (int)strlen(msg.content));
             }
+        } else if (strcmp(msg.channel, MIMI_CHAN_FEISHU) == 0) {
+            esp_err_t send_err = feishu_send_message(msg.chat_id, msg.content);
+            if (send_err != ESP_OK) {
+                ESP_LOGE(TAG, "Feishu send failed for %s: %s", msg.chat_id, esp_err_to_name(send_err));
+            } else {
+                ESP_LOGI(TAG, "Feishu send success for %s (%d bytes)", msg.chat_id, (int)strlen(msg.content));
+            }
         } else if (strcmp(msg.channel, MIMI_CHAN_WEBSOCKET) == 0) {
             esp_err_t ws_err = ws_server_send(msg.chat_id, msg.content);
             if (ws_err != ESP_OK) {
@@ -121,6 +129,7 @@ void app_main(void)
     ESP_ERROR_CHECK(wifi_manager_init());
     ESP_ERROR_CHECK(http_proxy_init());
     ESP_ERROR_CHECK(telegram_bot_init());
+    ESP_ERROR_CHECK(feishu_bot_init());
     ESP_ERROR_CHECK(llm_proxy_init());
     ESP_ERROR_CHECK(tool_registry_init());
     ESP_ERROR_CHECK(cron_service_init());
@@ -149,6 +158,7 @@ void app_main(void)
             /* Start network-dependent services */
             ESP_ERROR_CHECK(agent_loop_start());
             ESP_ERROR_CHECK(telegram_bot_start());
+            ESP_ERROR_CHECK(feishu_bot_start());
             cron_service_start();
             heartbeat_start();
             ESP_ERROR_CHECK(ws_server_start());
diff --git a/main/mimi_config.h b/main/mimi_config.h
index 9244f05..0b90860 100644
--- a/main/mimi_config.h
+++ b/main/mimi_config.h
@@ -37,6 +37,12 @@
 #ifndef MIMI_SECRET_SEARCH_KEY
 #define MIMI_SECRET_SEARCH_KEY      ""
 #endif
+#ifndef MIMI_SECRET_FEISHU_APP_ID
+#define MIMI_SECRET_FEISHU_APP_ID   ""
+#endif
+#ifndef MIMI_SECRET_FEISHU_APP_SECRET
+#define MIMI_SECRET_FEISHU_APP_SECRET ""
+#endif
 
 /* WiFi */
 #define MIMI_WIFI_MAX_RETRY          10
@@ -52,6 +58,15 @@
 #define MIMI_TG_CARD_SHOW_MS         3000
 #define MIMI_TG_CARD_BODY_SCALE      3
 
+/* Feishu Bot */
+#define MIMI_FEISHU_MAX_MSG_LEN          4096
+#define MIMI_FEISHU_POLL_STACK           (12 * 1024)
+#define MIMI_FEISHU_POLL_PRIO            5
+#define MIMI_FEISHU_POLL_CORE            0
+#define MIMI_FEISHU_WEBHOOK_PORT         18790
+#define MIMI_FEISHU_WEBHOOK_PATH         "/feishu/events"
+#define MIMI_FEISHU_WEBHOOK_MAX_BODY     (16 * 1024)
+
 /* Agent Loop */
 #define MIMI_AGENT_STACK             (24 * 1024)
 #define MIMI_AGENT_PRIO              6
@@ -114,6 +129,7 @@
 /* NVS Namespaces */
 #define MIMI_NVS_WIFI                "wifi_config"
 #define MIMI_NVS_TG                  "tg_config"
+#define MIMI_NVS_FEISHU              "feishu_config"
 #define MIMI_NVS_LLM                 "llm_config"
 #define MIMI_NVS_PROXY               "proxy_config"
 #define MIMI_NVS_SEARCH              "search_config"
@@ -122,6 +138,8 @@
 #define MIMI_NVS_KEY_SSID            "ssid"
 #define MIMI_NVS_KEY_PASS            "password"
 #define MIMI_NVS_KEY_TG_TOKEN        "bot_token"
+#define MIMI_NVS_KEY_FEISHU_APP_ID   "app_id"
+#define MIMI_NVS_KEY_FEISHU_APP_SECRET "app_secret"
 #define MIMI_NVS_KEY_API_KEY         "api_key"
 #define MIMI_NVS_KEY_MODEL           "model"
 #define MIMI_NVS_KEY_PROVIDER        "provider"
diff --git a/main/mimi_secrets.h.example b/main/mimi_secrets.h.example
index 456ecbc..ac087b0 100644
--- a/main/mimi_secrets.h.example
+++ b/main/mimi_secrets.h.example
@@ -17,6 +17,10 @@
 /* Telegram Bot */
 #define MIMI_SECRET_TG_TOKEN        ""
 
+/* Feishu Bot */
+#define MIMI_SECRET_FEISHU_APP_ID   ""
+#define MIMI_SECRET_FEISHU_APP_SECRET ""
+
 /* Anthropic API */
 #define MIMI_SECRET_API_KEY         ""
 #define MIMI_SECRET_MODEL           ""