diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index b0ff10b..eb71684 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -29,7 +29,11 @@ jobs:
           fi
       - name: Run pytest
         run: uv run pytest .
-      - name: Check formatting (black)
-        run: uv run black --check . --extend-exclude .venv
       - name: Lint (ruff)
         run: uv run ruff check .
+      - name: Typing (mypy)
+        run: uv run mypy .
+      - name: Check formatting (black)
+        run: uv run black --check . --extend-exclude .venv
+      - name: Check formatting (black)
+        run: uv run black --check . --extend-exclude .venv
diff --git a/pyproject.toml b/pyproject.toml
index cb5a7c8..80ade47 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,6 +34,10 @@ utils = { index = "gitea" }
 [tool.black]
 target-version = [ "py314" ]
 
+[[tool.mypy.overrides]]
+module = ["exiftool", "exiftool.*", "utils", "utils.*"]
+ignore_missing_imports = true
+
 [[tool.uv.index]]
 name = "gitea"
 url = "https://gitea.schneiderserver.site/api/packages/mathias2784/pypi/simple"
diff --git a/src/photools3/llm_session.py b/src/photools3/llm_session.py
index 4530efe..c79a19f 100644
--- a/src/photools3/llm_session.py
+++ b/src/photools3/llm_session.py
@@ -4,7 +4,7 @@ import re
 
 import openai
 from openai import OpenAI
-from pydantic import ValidationError
+from pydantic import BaseModel, ValidationError
 
 from photools3.models import (
     LlmMessageContent,
@@ -47,7 +47,8 @@ def _correction_prompt(
 class LlmSession:
     base_url: str = str(settings.llm_api_base_url)
     api_key: str = settings.llm_api_key
-    response_model = LlmResponseGeneral
+    response_model: type[BaseModel] = LlmResponseGeneral
+    prompt: str = ""
 
     def __init__(
         self, system_prompt: str, temperature: float = settings.llm_default_temperature
@@ -81,15 +82,15 @@ class LlmSession:
 
     def call(
         self,
-        prompt: str,
         photos: list[Photo],
         model_id=None,
         max_retries: int = 2,
+        prompt: str | None = None,
     ):
         if not model_id:
             model_id = self.models[0].id
 
-        request = self._build_request(prompt, photos, model_id)
+        request = self._build_request(prompt or self.prompt, photos, model_id)
 
         last_error = None
         for attempt in range(max_retries + 1):
@@ -156,6 +157,7 @@ class LlmSession:
 
 class LlmSessionCaptionsAndKeywords(LlmSession):
     response_model = LlmResponseCaptionsAndKeywords
+    prompt = "Give me a caption and keyword for the following photo(s)"
 
     def __init__(self, temperature: float = settings.llm_default_temperature):
         super().__init__(
@@ -168,16 +170,10 @@ class LlmSessionCaptionsAndKeywords(LlmSession):
             temperature=temperature,
         )
 
-    def call(self, photos: list[Photo], model_id=None):
-        return super().call(
-            prompt="Give me a caption and keyword for the following photo(s)",
-            photos=photos,
-            model_id=model_id,
-        )
-
 
 class LlmSessionQuality(LlmSession):
     response_model = LlmResponseQuality
+    prompt = "Assess the quality of the following photos to help me decide which ones to sort out"
 
     def __init__(self, temperature: float = settings.llm_default_temperature):
         super().__init__(
@@ -189,10 +185,3 @@ class LlmSessionQuality(LlmSession):
             ),
             temperature=temperature,
         )
-
-    def call(self, photos: list[Photo], model_id=None):
-        return super().call(
-            prompt="Assess the quality of the following photos to help me decide which ones to sort out",
-            photos=photos,
-            model_id=model_id,
-        )
diff --git a/src/photools3/settings.py b/src/photools3/settings.py
index 22d65cb..2ceae41 100644
--- a/src/photools3/settings.py
+++ b/src/photools3/settings.py
@@ -22,4 +22,4 @@ class Settings(BaseSettings):
     metadata_prefix: str
 
 
-settings = Settings()  # type: ignore[reportCallIssue]
+settings = Settings()  # type: ignore[call-arg]