diff --git a/docs/docs/tools/describe.md b/docs/docs/tools/describe.md
index d929679c..74408918 100644
--- a/docs/docs/tools/describe.md
+++ b/docs/docs/tools/describe.md
@@ -124,6 +124,9 @@ This option is enabled by default via the `pr_description.enable_pr_diagram` par
         <td><b>enable_semantic_files_types</b></td>
         <td>If set to true, "Changes walkthrough" section will be generated. Default is true.</td>
       </tr>
+       <tr>
+            <td><b>file_table_collapsible_open_by_default</b></td>
+            <td>If set to true, the file list in the "Changes walkthrough" section will be open by default. If set to false, it will be closed by default. Default is false.</td>
       <tr>
         <td><b>collapsible_file_list</b></td>
         <td>If set to true, the file list in the "Changes walkthrough" section will be collapsible. If set to "adaptive", the file list will be collapsible only if there are more than 8 files. Default is "adaptive".</td>
diff --git a/pr_agent/settings/pr_description_prompts.toml b/pr_agent/settings/pr_description_prompts.toml
index cc789c94..ba51e1ec 100644
--- a/pr_agent/settings/pr_description_prompts.toml
+++ b/pr_agent/settings/pr_description_prompts.toml
@@ -48,8 +48,8 @@ class PRDescription(BaseModel):
     description: str = Field(description="summarize the PR changes in up to four bullet points, each up to 8 words. For large PRs, add sub-bullets if needed. Order bullets by importance, with each bullet highlighting a key change group.")
     title: str = Field(description="a concise and descriptive title that captures the PR's main theme")
 {%- if enable_pr_diagram %}
-    changes_diagram: str = Field(description="a horizontal diagram that represents the main PR changes, in the format of a valid mermaid LR flowchart. The diagram should be concise and easy to read. Leave empty if no diagram is relevant. To create robust Mermaid diagrams, follow this two-step process: (1) Declare the nodes: nodeID[\"node description\"]. (2) Then define the links: nodeID1 -- \"link text\" --> nodeID2. Node description must always be surrounded with quotation marks.")
-{%- endif %}
+    changes_diagram: str = Field(description='a horizontal diagram that represents the main PR changes, in the format of a valid mermaid LR flowchart. The diagram should be concise and easy to read. Leave empty if no diagram is relevant. To create robust Mermaid diagrams, follow this two-step process: (1) Declare the nodes: nodeID["node description"]. (2) Then define the links: nodeID1 -- "link text" --> nodeID2. Node description must always be surrounded with double quotation marks')
+'{%- endif %}
 {%- if enable_semantic_files_types %}
     pr_files: List[FileDescription] = Field(max_items=20, description="a list of all the files that were changed in the PR, and summary of their changes. Each file must be analyzed regardless of change size.")
 {%- endif %}
@@ -67,11 +67,11 @@ description: |
 title: |
   ...
 {%- if enable_pr_diagram %}
-  changes_diagram: |
-    ```mermaid
-    flowchart LR
-      ...
-    ```
+changes_diagram: |
+  ```mermaid
+  flowchart LR
+    ...
+  ```
 {%- endif %}
 {%- if enable_semantic_files_types %}
 pr_files:
@@ -155,11 +155,11 @@ description: |
 title: |
   ...
 {%- if enable_pr_diagram %}
-  changes_diagram: |
-    ```mermaid
-    flowchart LR
-      ...
-    ```
+changes_diagram: |
+  ```mermaid
+  flowchart LR
+    ...
+  ```
 {%- endif %}
 {%- if enable_semantic_files_types %}
 pr_files: