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[PR #23985] [CLOSED] feat: add MCP prompt support in chats #82340

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opened 2026-05-13 16:51:03 -05:00 by GiteaMirror · 0 comments
GiteaMirror commented 2026-05-13 16:51:03 -05:00
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📋 Pull Request Information

Original PR: https://github.com/open-webui/open-webui/pull/23985
Author: @ultramancode
Created: 4/22/2026
Status: ❌ Closed

Base: dev ← Head: feat/mcp-prompts-dev

📝 Commits (2)

  • 47caa7b feat: add MCP prompt support in chats
  • 515e8d5 fix: stabilize MCP prompt flow

📊 Changes

77 files changed (+2163 additions, -116 deletions)

View changed files

📝 backend/open_webui/main.py (+1 -0)
📝 backend/open_webui/routers/configs.py (+2 -5)
📝 backend/open_webui/routers/tools.py (+110 -25)
➕ backend/open_webui/test/apps/webui/routers/test_tools.py (+225 -0)
➕ backend/open_webui/test/util/test_mcp_prompts.py (+663 -0)
📝 backend/open_webui/utils/mcp/client.py (+92 -17)
📝 backend/open_webui/utils/middleware.py (+203 -53)
📝 src/lib/apis/tools/index.ts (+62 -0)
📝 src/lib/components/chat/Chat.svelte (+129 -12)
📝 src/lib/components/chat/MessageInput.svelte (+147 -2)
📝 src/lib/components/chat/MessageInput/IntegrationsMenu.svelte (+28 -0)
➕ src/lib/components/chat/MessageInput/MCPPromptPickerModal.svelte (+98 -0)
📝 src/lib/components/chat/Messages.svelte (+6 -1)
📝 src/lib/components/chat/Messages/UserMessage.svelte (+23 -0)
📝 src/lib/components/chat/Placeholder.svelte (+3 -0)
📝 src/lib/i18n/locales/ar-BH/translation.json (+6 -0)
📝 src/lib/i18n/locales/ar/translation.json (+6 -0)
📝 src/lib/i18n/locales/az-AZ/translation.json (+6 -0)
📝 src/lib/i18n/locales/bg-BG/translation.json (+6 -0)
📝 src/lib/i18n/locales/bn-BD/translation.json (+6 -0)

...and 57 more files

📄 Description

Pull Request Checklist

Note to first-time contributors: Please open a discussion post in Discussions to discuss your idea/fix with the community before creating a pull request, and describe your changes before submitting a pull request.

This is to ensure large feature PRs are discussed with the community first, before starting work on it. If the community does not want this feature or it is not relevant for Open WebUI as a project, it can be identified in the discussion before working on the feature and submitting the PR.

Before submitting, make sure you've checked the following:

  • Target branch: Verify that the pull request targets the dev branch. PRs targeting main will be immediately closed.
  • Description: Provide a concise description of the changes made in this pull request down below.
  • Changelog: Ensure a changelog entry following the format of Keep a Changelog is added at the bottom of the PR description.
  • Documentation: Add docs in Open WebUI Docs Repository. Document user-facing behavior, environment variables, public APIs/interfaces, or deployment steps.
  • Dependencies: Are there any new or upgraded dependencies? If so, explain why, update the changelog/docs, and include any compatibility notes. Actually run the code/function that uses updated library to ensure it doesn't crash.
  • Testing: Perform manual tests to verify the implemented fix/feature works as intended AND does not break any other functionality. Include reproducible steps to demonstrate the issue before the fix. Test edge cases (URL encoding, HTML entities, types). Take this as an opportunity to make screenshots of the feature/fix and include them in the PR description.
  • Agentic AI Code: Confirm this Pull Request is not written by any AI Agent or has at least gone through additional human review AND manual testing. If any AI Agent is the co-author of this PR, it may lead to immediate closure of the PR.
  • Code review: Have you performed a self-review of your code, addressing any coding standard issues and ensuring adherence to the project's coding standards?
  • Design & Architecture: Prefer smart defaults over adding new settings; use local state for ephemeral UI logic. Open a Discussion for major architectural or UX changes.
  • Git Hygiene: Keep PRs atomic (one logical change). Clean up commits and rebase on dev to ensure no unrelated commits (e.g. from main) are included. Push updates to the existing PR branch instead of closing and reopening.
  • Title Prefix: To clearly categorize this pull request, prefix the pull request title using one of the following:
    • BREAKING CHANGE: Significant changes that may affect compatibility
    • build: Changes that affect the build system or external dependencies
    • ci: Changes to our continuous integration processes or workflows
    • chore: Refactor, cleanup, or other non-functional code changes
    • docs: Documentation update or addition
    • feat: Introduces a new feature or enhancement to the codebase
    • fix: Bug fix or error correction
    • i18n: Internationalization or localization changes
    • perf: Performance improvement
    • refactor: Code restructuring for better maintainability, readability, or scalability
    • style: Changes that do not affect the meaning of the code (white space, formatting, missing semi-colons, etc.)
    • test: Adding missing tests or correcting existing tests
    • WIP: Work in progress, a temporary label for incomplete or ongoing work

Changelog Entry

Description

  • Add MCP prompt support to chat so users can explicitly select an MCP prompt, provide prompt arguments, and apply it to the current turn.

Added

  • Added a chat UI flow for selecting server-defined MCP prompts directly from MCP integrations.
  • Added argument collection for MCP prompts that declare input parameters.
  • Added chat metadata badges so selected MCP prompts are visible on user messages.
  • Added backend support for resolving MCP prompt selections during chat requests.
  • Added test coverage for MCP prompt selection and chat application flows.

Changed

  • Changed chat request queue handling so queued messages preserve their selected MCP prompt and arguments.
  • Changed MCP prompt application so resolved prompt messages are inserted immediately before the active user turn in the chat payload.

Deprecated

  • None.

Removed

  • None.

Fixed

  • None.

Security

  • None.

Breaking Changes

  • None.

Additional Information

  • Related issue: [PR #15929] [CLOSED] feat: disable external api call on offline mode (#23984)
  • This addresses a chat UX gap when building or testing MCP server integrations, where server-defined prompts are often part of the workflow but could not previously be invoked directly from chat.
  • The scope of this PR is limited to one-turn MCP prompt selection, argument entry, queue preservation, and current-turn prompt application.

Screenshots or Videos

  • [Attach any relevant screenshots or videos demonstrating the changes]
  • Select an MCP prompt directly from the chat integrations menu and keep the current selection visible in the composer.
  • Browse available MCP prompts from the picker, including prompts that require arguments.
chat-mcp-prompt-entrypoint-and-selection chat-mcp-prompt-picker-modal chat-mcp-prompt-entrypoint-and-selection2
  • Video: End-to-end chat flow
    • a normal chat message without an MCP prompt
    • a chat message with a basic MCP prompt
    • re-sending from previous chat history
    • a chat message with an argument-based MCP prompt
    • queued chat requests preserving both normal and MCP-prompted messages

https://github.com/user-attachments/assets/a9587cd7-8962-4065-a508-798a1bc9ac0e

Contributor License Agreement

Note

Deleting the CLA section will lead to immediate closure of your PR and it will not be merged in.

🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.

## 📋 Pull Request Information **Original PR:** https://github.com/open-webui/open-webui/pull/23985 **Author:** [@ultramancode](https://github.com/ultramancode) **Created:** 4/22/2026 **Status:** ❌ Closed **Base:** `dev` ← **Head:** `feat/mcp-prompts-dev` --- ### 📝 Commits (2) - [`47caa7b`](https://github.com/open-webui/open-webui/commit/47caa7b44c83677e775a348fb4825a77ca9294ee) feat: add MCP prompt support in chats - [`515e8d5`](https://github.com/open-webui/open-webui/commit/515e8d51444e2c3ce10c3267ad9e45aee41d9228) fix: stabilize MCP prompt flow ### 📊 Changes **77 files changed** (+2163 additions, -116 deletions) <details> <summary>View changed files</summary> 📝 `backend/open_webui/main.py` (+1 -0) 📝 `backend/open_webui/routers/configs.py` (+2 -5) 📝 `backend/open_webui/routers/tools.py` (+110 -25) ➕ `backend/open_webui/test/apps/webui/routers/test_tools.py` (+225 -0) ➕ `backend/open_webui/test/util/test_mcp_prompts.py` (+663 -0) 📝 `backend/open_webui/utils/mcp/client.py` (+92 -17) 📝 `backend/open_webui/utils/middleware.py` (+203 -53) 📝 `src/lib/apis/tools/index.ts` (+62 -0) 📝 `src/lib/components/chat/Chat.svelte` (+129 -12) 📝 `src/lib/components/chat/MessageInput.svelte` (+147 -2) 📝 `src/lib/components/chat/MessageInput/IntegrationsMenu.svelte` (+28 -0) ➕ `src/lib/components/chat/MessageInput/MCPPromptPickerModal.svelte` (+98 -0) 📝 `src/lib/components/chat/Messages.svelte` (+6 -1) 📝 `src/lib/components/chat/Messages/UserMessage.svelte` (+23 -0) 📝 `src/lib/components/chat/Placeholder.svelte` (+3 -0) 📝 `src/lib/i18n/locales/ar-BH/translation.json` (+6 -0) 📝 `src/lib/i18n/locales/ar/translation.json` (+6 -0) 📝 `src/lib/i18n/locales/az-AZ/translation.json` (+6 -0) 📝 `src/lib/i18n/locales/bg-BG/translation.json` (+6 -0) 📝 `src/lib/i18n/locales/bn-BD/translation.json` (+6 -0) _...and 57 more files_ </details> ### 📄 Description <!-- ⚠️ CRITICAL CHECKS FOR CONTRIBUTORS (READ, DON'T DELETE) ⚠️ 1. Target the `dev` branch. PRs targeting `main` will be automatically closed. 2. Do NOT delete the CLA section at the bottom. It is required for the bot to accept your PR. --> # Pull Request Checklist ### Note to first-time contributors: Please open a discussion post in [Discussions](https://github.com/open-webui/open-webui/discussions) to discuss your idea/fix with the community before creating a pull request, and describe your changes before submitting a pull request. This is to ensure large feature PRs are discussed with the community first, before starting work on it. If the community does not want this feature or it is not relevant for Open WebUI as a project, it can be identified in the discussion before working on the feature and submitting the PR. <!-- ### ⚠️ Important: Your PR is a contribution, not a guarantee of merge. The most impactful way to contribute to Open WebUI is through well-written bug reports, detailed feature discussions, and thoughtful ideas. These directly shape the project. If you do open a pull request, please know that Open WebUI is held to the highest standard of code quality, consistency, and architectural coherence, and every line merged becomes something the core team must own, maintain, and support indefinitely. Submitted code may be refactored, rewritten, or used as inspiration for a different implementation. This is not a reflection of your work's quality. It is how we ensure that a small team can deeply understand and evolve every part of the codebase. --> **Before submitting, make sure you've checked the following:** - [x] **Target branch:** Verify that the pull request targets the `dev` branch. **PRs targeting `main` will be immediately closed.** - [x] **Description:** Provide a concise description of the changes made in this pull request down below. - [x] **Changelog:** Ensure a changelog entry following the format of [Keep a Changelog](https://keepachangelog.com/) is added at the bottom of the PR description. - [x] **Documentation:** Add docs in [Open WebUI Docs Repository](https://github.com/open-webui/docs). Document user-facing behavior, environment variables, public APIs/interfaces, or deployment steps. - [x] **Dependencies:** Are there any new or upgraded dependencies? If so, explain why, update the changelog/docs, and include any compatibility notes. Actually run the code/function that uses updated library to ensure it doesn't crash. - [x] **Testing:** Perform manual tests to **verify the implemented fix/feature works as intended AND does not break any other functionality**. Include reproducible steps to demonstrate the issue before the fix. Test edge cases (URL encoding, HTML entities, types). Take this as an opportunity to **make screenshots of the feature/fix and include them in the PR description**. - [x] **Agentic AI Code:** Confirm this Pull Request is **not written by any AI Agent** or has at least **gone through additional human review AND manual testing**. If any AI Agent is the co-author of this PR, it may lead to immediate closure of the PR. - [x] **Code review:** Have you performed a self-review of your code, addressing any coding standard issues and ensuring adherence to the project's coding standards? - [x] **Design & Architecture:** Prefer smart defaults over adding new settings; use local state for ephemeral UI logic. Open a Discussion for major architectural or UX changes. - [x] **Git Hygiene:** Keep PRs atomic (one logical change). Clean up commits and rebase on `dev` to ensure no unrelated commits (e.g. from `main`) are included. Push updates to the existing PR branch instead of closing and reopening. - [x] **Title Prefix:** To clearly categorize this pull request, prefix the pull request title using one of the following: - **BREAKING CHANGE**: Significant changes that may affect compatibility - **build**: Changes that affect the build system or external dependencies - **ci**: Changes to our continuous integration processes or workflows - **chore**: Refactor, cleanup, or other non-functional code changes - **docs**: Documentation update or addition - **feat**: Introduces a new feature or enhancement to the codebase - **fix**: Bug fix or error correction - **i18n**: Internationalization or localization changes - **perf**: Performance improvement - **refactor**: Code restructuring for better maintainability, readability, or scalability - **style**: Changes that do not affect the meaning of the code (white space, formatting, missing semi-colons, etc.) - **test**: Adding missing tests or correcting existing tests - **WIP**: Work in progress, a temporary label for incomplete or ongoing work # Changelog Entry ### Description - Add MCP prompt support to chat so users can explicitly select an MCP prompt, provide prompt arguments, and apply it to the current turn. ### Added - Added a chat UI flow for selecting server-defined MCP prompts directly from MCP integrations. - Added argument collection for MCP prompts that declare input parameters. - Added chat metadata badges so selected MCP prompts are visible on user messages. - Added backend support for resolving MCP prompt selections during chat requests. - Added test coverage for MCP prompt selection and chat application flows. ### Changed - Changed chat request queue handling so queued messages preserve their selected MCP prompt and arguments. - Changed MCP prompt application so resolved prompt messages are inserted immediately before the active user turn in the chat payload. ### Deprecated - None. ### Removed - None. ### Fixed - None. ### Security - None. ### Breaking Changes - None. --- ### Additional Information - Related issue: #23984 - This addresses a chat UX gap when building or testing MCP server integrations, where server-defined prompts are often part of the workflow but could not previously be invoked directly from chat. - The scope of this PR is limited to one-turn MCP prompt selection, argument entry, queue preservation, and current-turn prompt application. ### Screenshots or Videos - [Attach any relevant screenshots or videos demonstrating the changes] - Select an MCP prompt directly from the chat integrations menu and keep the current selection visible in the composer. - Browse available MCP prompts from the picker, including prompts that require arguments. <img width="821" height="276" alt="chat-mcp-prompt-entrypoint-and-selection" src="https://github.com/user-attachments/assets/f74e7674-a797-4f83-95c0-b24632945236" /> <img width="749" height="453" alt="chat-mcp-prompt-picker-modal" src="https://github.com/user-attachments/assets/c0bb58a2-6a6c-478b-86f1-1bb29587f916" /> <img width="761" height="79" alt="chat-mcp-prompt-entrypoint-and-selection2" src="https://github.com/user-attachments/assets/f8c290b7-dfbe-4f3a-84fd-fbcb0c5942ff" /> --- - Video: End-to-end chat flow - a normal chat message without an MCP prompt - a chat message with a basic MCP prompt - re-sending from previous chat history - a chat message with an argument-based MCP prompt - queued chat requests preserving both normal and MCP-prompted messages https://github.com/user-attachments/assets/a9587cd7-8962-4065-a508-798a1bc9ac0e ### Contributor License Agreement <!-- 🚨 DO NOT DELETE THE TEXT BELOW 🚨 Keep the "Contributor License Agreement" confirmation text intact. Deleting it will trigger the CLA-Bot to INVALIDATE your PR. Your PR will NOT be reviewed or merged until you check the box below confirming that you have read and agree to the terms of the CLA. --> - [x] By submitting this pull request, I confirm that I have read and fully agree to the [Contributor License Agreement (CLA)](https://github.com/open-webui/open-webui/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT), and I am providing my contributions under its terms. > [!NOTE] > Deleting the CLA section will lead to immediate closure of your PR and it will not be merged in. --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
GiteaMirror added the pull-request label 2026-05-13 16:51:03 -05:00
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Reference: github-starred/open-webui#82340
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