diff --git a/.gitignore b/.gitignore
index a3310a2e4..9a495b185 100644
--- a/.gitignore
+++ b/.gitignore
@@ -169,3 +169,6 @@ pyrightconfig.json
 
 # Local development configuration
 CLAUDE.md
+
+# Vitals provenance data
+.vitals/
diff --git a/headroom/__init__.py b/headroom/__init__.py
index 2d1b8c264..2d46db40b 100644
--- a/headroom/__init__.py
+++ b/headroom/__init__.py
@@ -153,7 +153,7 @@ from .transforms import (
     TransformPipeline,
 )
 
-__version__ = "0.4.2"
+__version__ = "0.4.3"
 
 __all__ = [
     # Main client
diff --git a/pyproject.toml b/pyproject.toml
index 20695fe61..fcf69372e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "headroom-ai"
-version = "0.4.2"
+version = "0.4.3"
 description = "The Context Optimization Layer for LLM Applications - Cut costs by 50-90%"
 readme = "README.md"
 license = "Apache-2.0"