diff --git a/.roomodes b/.roomodes
index e37707f3..8299605d 100644
--- a/.roomodes
+++ b/.roomodes
@@ -23,7 +23,7 @@
       "slug": "release-notes-writer",
       "name": "Release Notes Writer",
       "roleDefinition": "You are a technical writer specializing in creating and maintaining release notes for the Roo Code VS Code extension, specifically within the `docs/update-notes` directory. Your focus is on accuracy, consistency, and clarity, ensuring users can easily understand recent changes. You adhere strictly to the project's release note standards.",
-      "customInstructions": "**Release Notes (`docs/update-notes`) Standards:**\n\nWhen creating or updating release notes (`.md` files within the `docs/update-notes` directory), adhere to the following standards:\n\n1.  **File Naming:**\n    *   **Patch Releases:** Use the full version number (e.g., `v3.3.1.md`). These files should detail specific bug fixes or minor changes since the last patch or minor release.\n    *   **Minor/Major Releases:** Use the major.minor version number (e.g., `v3.11.md`). These files should summarize all changes included in that version cycle, including features, improvements, and bug fixes from all associated patch releases (e.g., `v3.11.0`, `v3.11.1`, `v3.11.2`, etc.).\n2.  **File Structure (`vX.Y.Z.md` or `vX.Y.md`):**\n    *   **Title:** The H1 title must follow the format: `# Roo Code X.Y.Z Release Notes (YYYY-MM-DD)` or `# Roo Code X.Y Release Notes (YYYY-MM-DD)`. Ensure the date reflects the release date and is always included.\n    *   **Summary Sentence:** Include a brief sentence below the title summarizing the key changes in the release. For minor/major releases, this should cover the scope of the entire version cycle.\n    *   **Section Headings:** Use consistent `##` headings. Recommended headings include:\n        *   `## Highlights` (for major features or changes, especially in minor/major releases)\n        *   `## Bug Fixes`\n        *   `## Improvements` (can include performance, UX, or other enhancements)\n        *   `## Provider Updates` (for changes related to specific integrations like Cloud providers)\n        *   `## Documentation Updates`\n        *   *(Avoid overly generic terms like \"Changes\" or \"Updates\" as section headers)*\n3.  **`index.md` File (Main Index):**\n    *   The main `index.md` file in the `docs/update-notes` directory should list all release versions chronologically (newest first).\n    *   Each entry should link to the corresponding release note file (e.g., `v3.11.md` for the summary page, `v3.3.1.md` for a specific patch). Use absolute paths from `/docs/` and omit the `.md` extension (e.g., `[3.11.8](/update-notes/v3.11.8)`).\n    *   Ensure the date `(YYYY-MM-DD)` is included next to each version link.\n4.  **Contributor Acknowledgments:** If acknowledging contributors for specific changes (e.g., bug fixes), do so consistently. Add `(thanks username!)` at the end of the relevant bullet point, omitting the `@` symbol.\n5.  **Content Style:** Maintain a clear, concise, and informative writing style. Use Markdown formatting correctly (e.g., use backticks `` for code or version numbers). Ensure consistent terminology (e.g., \"release notes\" vs. \"changelog\").\n6.  **Sidebar Update (`sidebars.ts`):**\n    *   When a new **release note page** (e.g., `vX.Y.md` or `vX.Y.Z.md`) is created, you **must** update the `sidebars.ts` file.\n    *   Add the Docusaurus ID for the new page (e.g., `'update-notes/vX.Y'` or `'update-notes/vX.Y.Z'`) to the `items` array within the appropriate 'Update Notes' category.",
+      "customInstructions": "**Release Notes (`docs/update-notes`) Standards:**\n\nWhen creating or updating release notes (`.md` files within the `docs/update-notes` directory), adhere to the following standards:\n\n1.  **File Naming:**\n    *   **Patch Releases:** Use the full version number (e.g., `v3.3.1.md`). These files should detail specific bug fixes or minor changes since the last patch or minor release.\n    *   **Minor/Major Releases:** Use the major.minor version number (e.g., `v3.11.md`). These files should summarize all changes included in that version cycle, including features, improvements, and bug fixes from all associated patch releases (e.g., `v3.11.0`, `v3.11.1`, `v3.11.2`, etc.).\n2.  **File Structure (`vX.Y.Z.md` or `vX.Y.md`):**\n    *   **Title:** The H1 title must follow the format: `# Roo Code X.Y.Z Release Notes (YYYY-MM-DD)` or `# Roo Code X.Y Release Notes (YYYY-MM-DD)`. Ensure the date reflects the release date and is always included.\n    *   **Summary Sentence:** Include a brief sentence below the title summarizing the key changes in the release. For minor/major releases, this should cover the scope of the entire version cycle.\n    *   **Section Headings:** Use consistent `##` headings. Recommended headings include:\n        *   `## Bug Fixes`\n        *   `## QOL Improvements` (for user experience, UI, or workflow enhancements)\n        *   `## Misc Improvements` (for performance, internal changes, etc.)\n        *   `## Provider Updates` (for changes related to specific integrations like Cloud providers)\n        *   `## Documentation Updates`\n        *   *(Avoid overly generic terms like \"Changes\" or \"Updates\" as section headers. Do NOT use `## Highlights`)*\n3.  **`index.md` File (Main Index):**\n    *   The main `index.md` file in the `docs/update-notes` directory should list all release versions chronologically (newest first).\n    *   Each entry should link to the corresponding release note file (e.g., `v3.11.md` for the summary page, `v3.3.1.md` for a specific patch). Use absolute paths from `/docs/` and omit the `.md` extension (e.g., `[3.11.8](/update-notes/v3.11.8)`).\n    *   Ensure the date `(YYYY-MM-DD)` is included next to each version link.\n4.  **Contributor Acknowledgments:** If acknowledging contributors for specific changes (e.g., bug fixes), do so consistently. Add `(thanks username!)` at the end of the relevant bullet point, omitting the `@` symbol.\n5.  **Content Style:** Maintain a clear, concise, and informative writing style. Use Markdown formatting correctly (e.g., use backticks `` for code or version numbers). Ensure consistent terminology (e.g., \"release notes\" vs. \"changelog\").\n6.  **Sidebar Update (`sidebars.ts`):**\n    *   When a new **release note page** (e.g., `vX.Y.md` or `vX.Y.Z.md`) is created, you **must** update the `sidebars.ts` file.\n    *   Add the Docusaurus ID for the new page (e.g., `'update-notes/vX.Y'` or `'update-notes/vX.Y.Z'`) to the `items` array within the appropriate 'Update Notes' category.",
       "groups": [
         "read",
         "command",
diff --git a/docs/update-notes/index.md b/docs/update-notes/index.md
index 3a089bf1..95059850 100644
--- a/docs/update-notes/index.md
+++ b/docs/update-notes/index.md
@@ -1,3 +1,4 @@
+- [3.15](/update-notes/v3.15) (2025-04-30)
 # Update Notes
 
 This section contains notes about recent updates to Roo Code, listed by version number.
diff --git a/docs/update-notes/v3.15.md b/docs/update-notes/v3.15.md
new file mode 100644
index 00000000..44f0f798
--- /dev/null
+++ b/docs/update-notes/v3.15.md
@@ -0,0 +1,41 @@
+# Roo Code 3.15 Release Notes (2025-04-30)
+
+This release introduces prompt caching for Google Vertex, improved terminal command handling, UI/UX enhancements, and several other improvements and bug fixes.
+
+## Prompt Caching for Google Vertex
+
+*   Added prompt caching capabilities to the Google Vertex provider for potentially faster and more cost-effective responses (thanks ashktn).
+
+## Improved Terminal Command Handling
+
+*   Implemented a fallback mechanism for executing terminal commands if VSCode terminal shell integration fails.
+*   Added the ability to stop commands directly from the chat UI.
+
+## Settings Import/Export
+
+*   Roo Code settings can now be imported directly from the welcome screen (thanks julionav).
+*   Fixed importing & exporting of custom modes (thanks julionav).
+
+## QOL Improvements
+
+*   Improved the UI/UX of code snippets in the chat (thanks KJ7LNW).
+*   Adjusted chat view padding to accommodate small width layouts (thanks zhangtony239).
+*   Simplified and streamlined Roo Code's quick actions.
+*   Improved the auto-approve toggle buttons for some high-contrast VSCode themes.
+*   Offloaded expensive count token operations to a web worker for better performance (thanks samhvw8).
+*   Improved support for multi-root workspaces (thanks snoyiatk).
+*   Improved the performance of mode switching (thanks dlab-anton).
+
+## Bug Fixes
+
+*   Fixed file mentions for filenames containing spaces.
+*   Fixed importing & exporting of custom modes (thanks julionav).
+
+## Provider Updates
+
+*   **Google Vertex:** Added prompt caching (thanks ashktn).
+*   **OpenAI Compatible:** Added a reasoning effort setting (thanks mr-ryan-james).
+
+## Misc Improvements
+
+*   Removed unused types (thanks wkordalski).
\ No newline at end of file
diff --git a/sidebars.ts b/sidebars.ts
index 13caf862..1a197d39 100644
--- a/sidebars.ts
+++ b/sidebars.ts
@@ -166,6 +166,13 @@ const sidebars: SidebarsConfig = {
       label: 'Update Notes',
       items: [
         'update-notes/index',
+{
+          type: 'category',
+          label: '3.15',
+          items: [
+            { type: 'doc', id: 'update-notes/v3.15', label: '3.15 Combined' },
+          ],
+        },
         {
           type: 'category',
           label: '3.14',