diff --git a/agent_cli/_tools.py b/agent_cli/_tools.py
index 1a7ce895..9f068b02 100644
--- a/agent_cli/_tools.py
+++ b/agent_cli/_tools.py
@@ -130,7 +130,7 @@ def execute_code(code: str) -> str:
     except subprocess.CalledProcessError as e:
         return f"Error executing code: {e.stderr}"
     except FileNotFoundError:
-        return f"Error: Command not found: {code.split()[0]}"
+        return f"Error: Command not found: {code.split(maxsplit=1)[0]}"
 
 
 def add_memory(content: str, category: str = "general", tags: str = "") -> str:
diff --git a/agent_cli/agents/transcribe_live.py b/agent_cli/agents/transcribe_live.py
index f5e8640c..d4c61220 100644
--- a/agent_cli/agents/transcribe_live.py
+++ b/agent_cli/agents/transcribe_live.py
@@ -188,7 +188,7 @@ async def _process_segment(  # noqa: PLR0912
     if cfg.clipboard:
         import pyperclip  # noqa: PLC0415
 
-        text_to_copy = processed if processed else transcript
+        text_to_copy = processed or transcript
         pyperclip.copy(text_to_copy)
 
     # Log
diff --git a/agent_cli/core/deps.py b/agent_cli/core/deps.py
index 7ee0d874..10254ebd 100644
--- a/agent_cli/core/deps.py
+++ b/agent_cli/core/deps.py
@@ -61,7 +61,7 @@ def _is_uvx_cache() -> bool:
 
 def _check_package_installed(pkg: str) -> bool:
     """Check if a single package is installed."""
-    top_module = pkg.split(".")[0]
+    top_module = pkg.split(".", maxsplit=1)[0]
     try:
         return find_spec(top_module) is not None
     except (ValueError, ModuleNotFoundError):
diff --git a/agent_cli/dev/cli.py b/agent_cli/dev/cli.py
index a38def29..9eb9640c 100644
--- a/agent_cli/dev/cli.py
+++ b/agent_cli/dev/cli.py
@@ -311,7 +311,7 @@ def _get_config_agent_env() -> dict[str, dict[str, str]] | None:
             agent_name = key[len(prefix) :]
             result[agent_name] = value
 
-    return result if result else None
+    return result or None
 
 
 def _get_agent_env(agent: CodingAgent) -> dict[str, str]:
@@ -350,7 +350,7 @@ def _merge_agent_args(
     if cli_args:
         result.extend(cli_args)
 
-    return result if result else None
+    return result or None
 
 
 def _is_ssh_session() -> bool:
diff --git a/agent_cli/install/service_config.py b/agent_cli/install/service_config.py
index 057a41b1..dbe15776 100644
--- a/agent_cli/install/service_config.py
+++ b/agent_cli/install/service_config.py
@@ -135,7 +135,7 @@ def build_service_command(
         args.extend(["--python", service.python_version])
 
     # Build the command: either custom command path or default "server <name>"
-    cmd_path = service.command if service.command else ["server", service.name]
+    cmd_path = service.command or ["server", service.name]
 
     args.extend(
         [
diff --git a/docker/tts.Dockerfile b/docker/tts.Dockerfile
index c2040e45..d0181557 100644
--- a/docker/tts.Dockerfile
+++ b/docker/tts.Dockerfile
@@ -51,7 +51,7 @@ RUN uv sync --frozen --no-dev --no-editable --extra server --extra piper --extra
 # =============================================================================
 # CUDA target: GPU-accelerated with Kokoro TTS
 # =============================================================================
-FROM nvcr.io/nvidia/cuda:12.9.1-cudnn-runtime-ubuntu24.04 AS cuda
+FROM nvcr.io/nvidia/cuda:13.1.1-cudnn-runtime-ubuntu24.04 AS cuda
 
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
 
diff --git a/docker/whisper.Dockerfile b/docker/whisper.Dockerfile
index a01e0caf..e57acb07 100644
--- a/docker/whisper.Dockerfile
+++ b/docker/whisper.Dockerfile
@@ -31,7 +31,7 @@ RUN uv sync --frozen --no-dev --no-editable --extra server --extra faster-whispe
 # =============================================================================
 # CUDA target: GPU-accelerated with faster-whisper
 # =============================================================================
-FROM nvcr.io/nvidia/cuda:12.9.1-cudnn-runtime-ubuntu24.04 AS cuda
+FROM nvcr.io/nvidia/cuda:13.1.1-cudnn-runtime-ubuntu24.04 AS cuda
 
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/