diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2bf65e78..51057687 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,10 @@ Status of the `main` branch. Changes prior to the next official version change w
 
 * General:
   * **Initial instructions no longer need to be loaded by the user**
-  * Significantly extended CLI 
+  * Significantly extended CLI
+  * Removed `replace_regex` tool from `ide-assistant` and `codex` contexts.
+    The current string replacement tool in Claude Code seems to be sufficiently efficient and is better
+    integrated with the IDE. Users who want to enable `replace_regex` can do so by customizing the context.
 
 * Configuration:
   * Simplify customization of modes and contexts, including CLI support.
diff --git a/src/serena/resources/config/contexts/codex.yml b/src/serena/resources/config/contexts/codex.yml
index 27a13673..8ca5433f 100644
--- a/src/serena/resources/config/contexts/codex.yml
+++ b/src/serena/resources/config/contexts/codex.yml
@@ -21,6 +21,8 @@ excluded_tools:
   - read_file
   - execute_shell_command
   - prepare_for_new_conversation
+  - replace_regex
+
 
 tool_description_overrides: {}
 
diff --git a/src/serena/resources/config/contexts/ide-assistant.yml b/src/serena/resources/config/contexts/ide-assistant.yml
index 27a13673..3bbbc6f7 100644
--- a/src/serena/resources/config/contexts/ide-assistant.yml
+++ b/src/serena/resources/config/contexts/ide-assistant.yml
@@ -21,6 +21,7 @@ excluded_tools:
   - read_file
   - execute_shell_command
   - prepare_for_new_conversation
+  - replace_regex
 
 tool_description_overrides: {}