diff --git a/Cargo.lock b/Cargo.lock
index ee59072..05b11ff 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -585,6 +585,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
 [[package]]
 name = "libc"
 version = "0.2.155"
@@ -662,6 +668,16 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
+dependencies = [
+ "overload",
+ "winapi",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.16.0"
@@ -731,6 +747,12 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "overload"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -823,13 +845,14 @@ dependencies = [
  "clap_complete",
  "futures",
  "glob",
- "log",
  "rand",
  "regex",
  "reqwest",
  "serde",
  "serde_json",
  "tokio",
+ "tracing",
+ "tracing-subscriber",
  "uuid",
 ]
 
@@ -1116,6 +1139,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.2"
@@ -1218,6 +1250,16 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b9ef9bad013ada3808854ceac7b46812a6465ba368859a37e2100283d2d719c"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.8.0"
@@ -1331,9 +1373,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3523ab5a71916ccf420eebdf5521fcef02141234bbc0b8a49f2fdc4544364ef"
 dependencies = [
  "pin-project-lite",
+ "tracing-attributes",
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-attributes"
+version = "0.1.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "tracing-core"
 version = "0.1.32"
@@ -1341,6 +1395,32 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c06d3da6113f116aaee68e4d601191614c9053067f9ab7f6edbcb161237daa54"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad0f048c97dbd9faa9b7df56362b8ebcaa52adb06b498c050d2f4e32f90a7a8b"
+dependencies = [
+ "nu-ansi-term",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing-core",
+ "tracing-log",
 ]
 
 [[package]]
@@ -1402,6 +1482,12 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "valuable"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -1512,6 +1598,28 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
diff --git a/Cargo.toml b/Cargo.toml
index d188a47..d4f5dc8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,20 +3,19 @@ name = "puppet"
 version = "0.3.1"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
+tracing = "0"
+tracing-subscriber = "0"
 clap = { version = "4", features = ["derive"] }
 clap_complete = "4"
 serde = { version = "1", features = ["derive", "rc"] }
 serde_json = "1"
-log = "0"
 tokio = { version = "1", features = ["full"] }
 reqwest = { version = "0", features = ["stream"] }
 bytes = "1"
+futures = "0"
 rand = "0"
 base64 = "0"
 uuid = { version = "1", features = ["v4"] }
 regex = "1"
 glob = "0"
-futures = "0"
diff --git a/src/azure/chatgpt.rs b/src/azure/chatgpt.rs
index ccf53e8..1d9a0b9 100644
--- a/src/azure/chatgpt.rs
+++ b/src/azure/chatgpt.rs
@@ -11,9 +11,9 @@ use bytes::Bytes;
 use futures::AsyncBufReadExt;
 use futures::StreamExt;
 use futures::TryStreamExt;
-use log::info;
 use reqwest::Response;
 use tokio::fs;
+use tracing::info;
 
 use super::chatgpt_api::ChatCompletionChoice;
 use super::chatgpt_api::ChatResponse;
@@ -134,8 +134,8 @@ impl ChatGPT {
                 for result in results {
                     self.add_message(ChatRequestMessage::new_function_response(result.id, json::to_json(&result.value)?));
                 }
-            } else if let Some(content) = message.content {
-                self.add_message(ChatRequestMessage::new_message(Role::Assistant, content));
+            } else {
+                self.add_message(ChatRequestMessage::new_message(Role::Assistant, message.content.unwrap()));
                 return Ok(());
             }
         }
@@ -168,7 +168,8 @@ impl ChatGPT {
         let response = request.send().await?;
         let status = response.status();
         if status != 200 {
-            info!("body={}", str::from_utf8(&body)?);
+            let body = str::from_utf8(&body)?;
+            info!("body={}", body);
             let response_text = response.text().await?;
             return Err(Exception::ExternalError(format!(
                 "failed to call azure api, status={status}, response={response_text}"
@@ -207,7 +208,6 @@ async fn read_sse_response(http_response: Response) -> Result<ChatResponse, Exce
     while let Some(line) = lines.next().await {
         let line = line?;
 
-        // chatgpt always adds space after data:
         if let Some(data) = line.strip_prefix("data: ") {
             if data == "[DONE]" {
                 break;
diff --git a/src/command/complete.rs b/src/command/complete.rs
index 26a6cfc..65c94ac 100644
--- a/src/command/complete.rs
+++ b/src/command/complete.rs
@@ -7,12 +7,12 @@ use clap::Args;
 use glob::glob;
 use glob::GlobError;
 use glob::PatternError;
-use log::info;
 use regex::Regex;
 use tokio::fs;
 use tokio::io::AsyncBufReadExt;
 use tokio::io::AsyncWriteExt;
 use tokio::io::BufReader;
+use tracing::info;
 
 use crate::llm;
 use crate::llm::ChatOption;
diff --git a/src/command/speak.rs b/src/command/speak.rs
index 4b903e7..3916d07 100644
--- a/src/command/speak.rs
+++ b/src/command/speak.rs
@@ -3,11 +3,11 @@ use std::path::PathBuf;
 
 use clap::arg;
 use clap::Args;
-use log::info;
 use tokio::fs;
 use tokio::io::stdin;
 use tokio::io::AsyncReadExt;
 use tokio::process::Command;
+use tracing::info;
 use uuid::Uuid;
 
 use crate::tts;
diff --git a/src/gcloud/gemini.rs b/src/gcloud/gemini.rs
index 227f6f1..20500be 100644
--- a/src/gcloud/gemini.rs
+++ b/src/gcloud/gemini.rs
@@ -11,9 +11,9 @@ use bytes::Bytes;
 use futures::AsyncBufReadExt;
 use futures::StreamExt;
 use futures::TryStreamExt;
-use log::info;
 use reqwest::Response;
 use tokio::fs;
+use tracing::info;
 
 use super::gemini_api::Content;
 use super::gemini_api::GenerateContentResponse;
@@ -21,6 +21,7 @@ use super::gemini_api::GenerationConfig;
 use super::gemini_api::InlineData;
 use super::gemini_api::StreamGenerateContent;
 use super::gemini_api::Tool;
+use super::token;
 use crate::gcloud::gemini_api::Candidate;
 use crate::gcloud::gemini_api::GenerateContentStreamResponse;
 use crate::gcloud::gemini_api::Role;
@@ -142,7 +143,7 @@ impl Gemini {
         let body = Bytes::from(body);
         let response = http_client::http_client()
             .post(&self.url)
-            // .bearer_auth(token())
+            .bearer_auth(token())
             .header("Content-Type", "application/json")
             .header("Accept", "application/json")
             .body(body.clone())
@@ -151,7 +152,8 @@ impl Gemini {
 
         let status = response.status();
         if status != 200 {
-            info!("body={}", str::from_utf8(&body)?);
+            let body = str::from_utf8(&body)?;
+            info!("body={}", body);
             let response_text = response.text().await?;
             return Err(Exception::ExternalError(format!(
                 "failed to call gcloud api, status={status}, response={response_text}"
@@ -183,7 +185,7 @@ async fn read_sse_response(http_response: Response) -> Result<GenerateContentRes
     let mut lines = reader.lines();
     while let Some(line) = lines.next().await {
         let line = line?;
-        if let Some(data) = line.strip_prefix("data:") {
+        if let Some(data) = line.strip_prefix("data: ") {
             let stream_response: GenerateContentStreamResponse = json::from_json(data)?;
             if let Some(value) = stream_response.usage_metadata {
                 response.usage_metadata = value;
diff --git a/src/gcloud/tts.rs b/src/gcloud/tts.rs
index 5ed28be..71172ca 100644
--- a/src/gcloud/tts.rs
+++ b/src/gcloud/tts.rs
@@ -3,9 +3,9 @@ use std::borrow::Cow;
 use base64::prelude::BASE64_STANDARD;
 use base64::DecodeError;
 use base64::Engine;
-use log::info;
 use serde::Deserialize;
 use serde::Serialize;
+use tracing::info;
 
 use super::token;
 use crate::util::exception::Exception;
diff --git a/src/llm.rs b/src/llm.rs
index bf73f73..dca7928 100644
--- a/src/llm.rs
+++ b/src/llm.rs
@@ -1,7 +1,7 @@
 use std::path::Path;
 
-use log::info;
 use tokio::fs;
+use tracing::info;
 
 use crate::azure::chatgpt::ChatGPT;
 use crate::gcloud::gemini::Gemini;
diff --git a/src/llm/config.rs b/src/llm/config.rs
index f889e60..750d12d 100644
--- a/src/llm/config.rs
+++ b/src/llm/config.rs
@@ -1,9 +1,9 @@
 use std::collections::HashMap;
 
-use log::info;
 use rand::Rng;
 use serde::Deserialize;
 use serde_json::json;
+use tracing::info;
 
 use super::function::FunctionImplementations;
 use crate::azure::chatgpt::ChatGPT;
diff --git a/src/llm/function.rs b/src/llm/function.rs
index 437979f..9bd363b 100644
--- a/src/llm/function.rs
+++ b/src/llm/function.rs
@@ -1,9 +1,9 @@
 use std::collections::HashMap;
 use std::sync::Arc;
 
-use log::info;
 use serde::Serialize;
 use tokio::task::JoinSet;
+use tracing::info;
 
 use crate::util::exception::Exception;
 
diff --git a/src/main.rs b/src/main.rs
index 9e89636..57ce1ed 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -37,6 +37,7 @@ pub enum Command {
 
 #[tokio::main]
 async fn main() -> Result<(), Exception> {
+    tracing_subscriber::fmt().with_thread_ids(true).init();
     let cli = Cli::parse();
     match cli.command {
         Command::Chat(command) => command.execute().await,
diff --git a/src/tts.rs b/src/tts.rs
index bbad84e..b5efb43 100644
--- a/src/tts.rs
+++ b/src/tts.rs
@@ -1,9 +1,9 @@
 use std::collections::HashMap;
 use std::path::Path;
 
-use log::info;
 use serde::Deserialize;
 use tokio::fs;
+use tracing::info;
 
 use crate::azure::tts::AzureTTS;
 use crate::gcloud::tts::GCloudTTS;