diff --git a/.chat_req.json b/.chat_req.json
new file mode 100644
index 0000000..cf01bb2
--- /dev/null
+++ b/.chat_req.json
@@ -0,0 +1 @@
+{"text":"hello","session_id":"e2e"}
diff --git a/configs/cat_state_machine.json b/configs/cat_state_machine.json
index 7d34b70..0463a75 100644
--- a/configs/cat_state_machine.json
+++ b/configs/cat_state_machine.json
@@ -1167,6 +1167,8 @@
   },
   "ai": {
     "backend": "local",
-    "whisper_lib_dir": "/home/showen/ai_spike/whisper.cpp/build/bin"
+    "whisper_lib_dir": "/home/showen/ai_spike/whisper.cpp/build/bin",
+    "piper_lib_dir": "/home/showen/ai_spike/piper",
+    "piper_config": "/home/showen/ai_spike/piper/zh_CN-huayan-medium.onnx.json"
   }
 }
\ No newline at end of file
diff --git a/configs/dog_state_machine.json b/configs/dog_state_machine.json
index 27f2acc..db6a501 100644
--- a/configs/dog_state_machine.json
+++ b/configs/dog_state_machine.json
@@ -1179,6 +1179,8 @@
   },
   "ai": {
     "backend": "local",
-    "whisper_lib_dir": "/home/showen/ai_spike/whisper.cpp/build/bin"
+    "whisper_lib_dir": "/home/showen/ai_spike/whisper.cpp/build/bin",
+    "piper_lib_dir": "/home/showen/ai_spike/piper",
+    "piper_config": "/home/showen/ai_spike/piper/zh_CN-huayan-medium.onnx.json"
   }
 }
\ No newline at end of file
diff --git a/src/core/config.rs b/src/core/config.rs
index aab268d..ef46e37 100644
--- a/src/core/config.rs
+++ b/src/core/config.rs
@@ -384,6 +384,12 @@ pub struct AiConfig {
     /// whisper-cli 依赖库路径 (libggml*.so 所在，部署时标定)
     #[serde(default)]
     pub whisper_lib_dir: Option<PathBuf>,
+    /// piper 依赖库路径 (libespeak-ng.so / libpiper_phonemize.so 所在)
+    #[serde(default)]
+    pub piper_lib_dir: Option<PathBuf>,
+    /// piper 模型 config json 路径 (.onnx.json)
+    #[serde(default)]
+    pub piper_config: Option<PathBuf>,
     /// 临时文件目录
     #[serde(default = "default_tmp_dir")]
     pub tmp_dir: PathBuf,
diff --git a/src/main.rs b/src/main.rs
index 5118a82..cbb14b5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -50,6 +50,8 @@ fn main() -> Result<()> {
     let ai_model_store = config.ai.model_store.clone();
     let ai_tools_dir = config.ai.tools_dir.clone();
     let ai_whisper_lib_dir = config.ai.whisper_lib_dir.clone();
+    let ai_piper_lib_dir = config.ai.piper_lib_dir.clone();
+    let ai_piper_config = config.ai.piper_config.clone();
     let ai_tmp_dir = config.ai.tmp_dir.clone();
     let ai_context_window = config.ai.context_window;
 
@@ -81,6 +83,8 @@ fn main() -> Result<()> {
         ai_model_store,
         ai_tools_dir,
         ai_whisper_lib_dir,
+        ai_piper_lib_dir,
+        ai_piper_config,
         ai_tmp_dir,
         ai_context_window,
     );
diff --git a/src/plugins/ai/backend.rs b/src/plugins/ai/backend.rs
index 7d2109a..c5ae1cb 100644
--- a/src/plugins/ai/backend.rs
+++ b/src/plugins/ai/backend.rs
@@ -48,6 +48,10 @@ pub struct LocalCliBackend {
     tools_dir: PathBuf,
     /// whisper-cli 依赖的库路径（libggml*.so 所在）
     whisper_lib_dir: Option<PathBuf>,
+    /// piper 依赖的库路径（libespeak-ng.so / libpiper_phonemize.so 所在）
+    piper_lib_dir: Option<PathBuf>,
+    /// piper 模型 config json 路径（.onnx.json）
+    piper_config: Option<PathBuf>,
 }
 
 impl LocalCliBackend {
@@ -55,6 +59,8 @@ impl LocalCliBackend {
         Self {
             tools_dir,
             whisper_lib_dir: None,
+            piper_lib_dir: None,
+            piper_config: None,
         }
     }
 
@@ -64,6 +70,13 @@ impl LocalCliBackend {
         self
     }
 
+    /// 设置 piper 依赖库路径和 config（部署时由 deploy_ai.sh 标定）
+    pub fn with_piper_deps(mut self, lib_dir: PathBuf, config: PathBuf) -> Self {
+        self.piper_lib_dir = Some(lib_dir);
+        self.piper_config = Some(config);
+        self
+    }
+
     fn whisper_cli(&self) -> PathBuf {
         self.tools_dir.join("whisper-cli")
     }
@@ -76,21 +89,26 @@ impl LocalCliBackend {
         self.tools_dir.join("piper")
     }
 
-    /// 给命令设置 LD_LIBRARY_PATH（whisper-cli 依赖 libggml*.so）
-    fn with_env(&self, cmd: &mut Command) {
-        if let Some(lib_dir) = &self.whisper_lib_dir {
-            cmd.env("LD_LIBRARY_PATH", lib_dir);
-        }
+    /// 给命令设置 LD_LIBRARY_PATH（合并所有库路径）
+    fn with_lib_path(&self, cmd: &mut Command, lib_dir: &Path) {
+        let existing = std::env::var("LD_LIBRARY_PATH").unwrap_or_default();
+        let new_path = if existing.is_empty() {
+            lib_dir.to_string_lossy().into_owned()
+        } else {
+            format!("{}:{}", lib_dir.to_string_lossy(), existing)
+        };
+        cmd.env("LD_LIBRARY_PATH", new_path);
     }
 }
 
 impl AiBackend for LocalCliBackend {
     fn asr(&self, audio_path: &Path, model_path: &Path) -> Result<String> {
         // whisper-cli -m <model> -f <audio> -l zh --no-timestamps -otxt -of <tmp>
-        // 输出到 <tmp>.txt，读取后返回
         let tmp_out = audio_path.with_extension("asr.txt");
         let mut cmd = Command::new(self.whisper_cli());
-        self.with_env(&mut cmd);
+        if let Some(lib_dir) = &self.whisper_lib_dir {
+            self.with_lib_path(&mut cmd, lib_dir);
+        }
         let output = cmd
             .arg("-m")
             .arg(model_path)
@@ -178,15 +196,25 @@ impl AiBackend for LocalCliBackend {
     }
 
     fn tts(&self, text: &str, model_path: &Path, output_path: &Path) -> Result<()> {
-        // echo <text> | piper -m <model> -f <output> --output_format wav
+        // echo <text> | piper -m <model> [-c <config>] -f <output> --output_format wav
+        // piper 依赖 libespeak-ng.so / libpiper_phonemize.so，需设 LD_LIBRARY_PATH
         let mut cmd = Command::new(self.piper());
+        if let Some(lib_dir) = &self.piper_lib_dir {
+            self.with_lib_path(&mut cmd, lib_dir);
+        }
         cmd.arg("-m")
             .arg(model_path)
             .arg("-f")
             .arg(output_path)
             .arg("--output_format")
-            .arg("wav")
-            .stdin(std::process::Stdio::piped())
+            .arg("wav");
+
+        // piper 需要 -c 指定 .onnx.json config 文件
+        if let Some(config) = &self.piper_config {
+            cmd.arg("-c").arg(config);
+        }
+
+        cmd.stdin(std::process::Stdio::piped())
             .stdout(std::process::Stdio::null())
             .stderr(std::process::Stdio::piped());
 
@@ -199,7 +227,8 @@ impl AiBackend for LocalCliBackend {
 
         if !output.status.success() {
             bail!(
-                "piper 失败: {}",
+                "piper 失败 (exit={}): {}",
+                output.status,
                 String::from_utf8_lossy(&output.stderr)
             );
         }
diff --git a/src/plugins/ai/mod.rs b/src/plugins/ai/mod.rs
index f2ce0ac..a2e5095 100644
--- a/src/plugins/ai/mod.rs
+++ b/src/plugins/ai/mod.rs
@@ -48,6 +48,8 @@ impl AiPlugin {
         model_store: PathBuf,
         tools_dir: PathBuf,
         whisper_lib_dir: Option<PathBuf>,
+        piper_lib_dir: Option<PathBuf>,
+        piper_config: Option<PathBuf>,
         tmp_dir: PathBuf,
         context_window: usize,
     ) -> Self {
@@ -55,6 +57,9 @@ impl AiPlugin {
         if let Some(lib_dir) = whisper_lib_dir {
             backend_builder = backend_builder.with_whisper_lib_dir(lib_dir);
         }
+        if let (Some(lib_dir), Some(config)) = (piper_lib_dir, piper_config) {
+            backend_builder = backend_builder.with_piper_deps(lib_dir, config);
+        }
         let backend = Box::new(backend_builder);
         let models = model_manager::ModelManager::new(model_store);
         let pipeline = ChatPipeline::new(backend, models, tmp_dir, context_window);