diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03ba284..6e52421 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.10.2] - 2026-01-07
+
+### Changed
+
+- **Enhanced environment endpoint logging** - Added detailed user claim logging for debugging
+  - Logs both `preferred_username` and `sub` claims when resolving user
+  - Distinguishes between authenticated and unauthenticated requests
+
 ## [1.10.1] - 2026-01-06
 
 ### Fixed
diff --git a/pyproject.toml b/pyproject.toml
index 61181ba..27459f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "core-api"
-version = "1.10.1"
+version = "1.10.2"
 description = "Core Code API - Infrastructure management and tools API"
 readme = "README.md"
 requires-python = ">=3.12"
diff --git a/src/controllers/tools_controller.py b/src/controllers/tools_controller.py
index 01b4459..d400555 100644
--- a/src/controllers/tools_controller.py
+++ b/src/controllers/tools_controller.py
@@ -141,9 +141,11 @@ class ToolsController(BaseController):
                 # Determine user identifier
                 user_id = "default"
                 if user:
+                    logger.debug(f"User claims: {user}")
                     user_id = user.get("preferred_username") or user.get("sub", "default")
-
-                logger.info(f"Fetching environment data for user: {user_id}")
+                    logger.info(f"Fetching environment data for user: {user_id} (preferred_username={user.get('preferred_username')}, sub={user.get('sub')})")
+                else:
+                    logger.info(f"Fetching environment data for user: {user_id} (no auth)")
                 result = await self.environment_service.get_current(user_id)
                 return result