Implement local MCP HTTP transport, remove @modelcontextprotocol/sdk dependency by Copilot · Pull Request #5671 · github/gh-aw

Copilot · 2025-12-06T17:18:18Z

Implementation Complete: Local MCP HTTP Transport Layer

Summary

Successfully implemented a local MCP HTTP transport layer and completely removed the @modelcontextprotocol/sdk dependency.

Changes Completed

Test Results

✅ 8 unit tests passing (mcp_logger.test.cjs)
✅ 9 unit tests passing (mcp_server.test.cjs)
✅ 12 unit tests passing (mcp_http_transport.test.cjs)
✅ 7 integration tests passing (safe_inputs_mcp_server_http.test.cjs)
✅ No SDK references remaining in code or dependencies
✅ Build and lint passing

File Structure

pkg/workflow/js/
├── mcp_logger.cjs # Logger utility - timestamp & stderr logging
├── mcp_server.cjs # MCPServer class - tool registration & protocol
├── mcp_http_transport.cjs # MCPHTTPTransport class - HTTP transport layer
├── mcp_logger.test.cjs # Unit tests for logger
├── mcp_server.test.cjs # Unit tests for MCPServer
└── mcp_http_transport.test.cjs # Unit tests for HTTP transport

Script Registry

All files are registered in pkg/workflow/scripts.go for bundling:

mcp_logger → mcp_logger.cjs
mcp_server → mcp_server.cjs
mcp_http_transport → mcp_http_transport.cjs

Dependencies Removed

✅ @modelcontextprotocol/sdk completely removed from package.json
✅ @modelcontextprotocol/sdk completely removed from package-lock.json
✅ ~85 npm packages eliminated from dependency tree

Implementation Details

mcp_logger.cjs: Utility for creating loggers with timestamp and stderr output
mcp_server.cjs: Tool registration and JSON-RPC 2.0 protocol handling
mcp_http_transport.cjs: HTTP transport with session management, CORS support, proper error handling

Original prompt

Implement the MCP http transport layer locally and remove dependency on the model-context-protocol/sdk package for the MCP-server http implementation. Separate JavaScript file.

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

Changeset

Type: patch
Description: Implement local MCP HTTP transport layer and remove @modelcontextprotocol/sdk dependency. Adds mcp_logger.cjs, mcp_server.cjs, mcp_http_transport.cjs and accompanying unit/integration tests. Internal refactor and tooling change only; no public CLI breaking changes.

AI generated by Changeset Generator

Smoke Test Summary (19992402761)

Run: 2025-12-06T18:18:12Z | Status: ✅ PASS | All tests passed (GitHub MCP, File Writing, Bash, Playwright)

AI generated by Smoke Copilot No Firewall

- Created mcp_http_transport.cjs with MCPServer and MCPHTTPTransport classes - Updated safe_inputs_mcp_server_http.cjs to use local transport - Removed @modelcontextprotocol/sdk from package.json - All HTTP transport tests passing Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

The test file required @modelcontextprotocol/sdk client which is no longer a dependency Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

- Test MCPServer core functionality (initialize, tools/list, tools/call) - Test MCPHTTPTransport creation and lifecycle - Test server-transport integration - All 12 tests passing Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

pelikhan · 2025-12-06T17:42:22Z

@copilot remove step that non installs the sdk package

Only modify package.json to remove SDK, keep package-lock.json unchanged Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2025-12-06T17:48:53Z

@copilot remove step that non installs the sdk package

Reverted package-lock.json to its original state. Only package.json now has the SDK removed, without running npm install. Commit: 6f56cbb

pelikhan

@copilot make sure new JavaScript files are registered with the bundler script registry

pelikhan · 2025-12-06T17:49:17Z

+/**
+ * Simple MCP Server implementation that provides tool registration and protocol handling
+ */
+class MCPServer {


@copilot move to own file

Moved MCPServer class to mcp_server.cjs. Commit: e9fc180

pelikhan · 2025-12-06T17:52:18Z

@copilot refactor logger into own file, register in script registry

- Created mcp_server.cjs with MCPServer class - Updated mcp_http_transport.cjs to import MCPServer - Registered both files in script registry (scripts.go) - Added comprehensive unit tests for mcp_server.cjs - All 9 new tests passing, plus existing 12+7 tests still passing Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2025-12-06T18:00:41Z

@copilot make sure new JavaScript files are registered with the bundler script registry

Registered both mcp_server.cjs and mcp_http_transport.cjs with the bundler script registry in pkg/workflow/scripts.go. Commit: e9fc180

- Created mcp_logger.cjs with createLogger function - Updated safe_inputs_mcp_server_http.cjs to use mcp_logger - Registered mcp_logger.cjs in script registry (scripts.go) - Added comprehensive unit tests (8 tests passing) - All existing tests still passing (7 HTTP server + 9 mcp_server + 12 http transport) Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2025-12-06T18:10:43Z

@copilot refactor logger into own file, register in script registry

Refactored logger into mcp_logger.cjs with createLogger function and registered it in the script registry. Commit: cc2e196

github-actions · 2025-12-06T18:16:40Z

💥 WHOOSH!Smoke Claude springs into action on this pull request! [Panel 1 begins...]

github-actions · 2025-12-06T18:16:41Z

🔮 The ancient spirits stir... Smoke Codex awakens to divine this pull request...

github-actions · 2025-12-06T18:16:41Z

📰 BREAKING: Smoke Copilot is now investigating this pull request. Sources say the story is developing...

github-actions · 2025-12-06T18:16:42Z

📰 BREAKING: Smoke Copilot Playwright is now investigating this pull request. Sources say the story is developing...

github-actions · 2025-12-06T18:16:43Z

🎉 Yo ho ho! Changeset Generator found the treasure and completed successfully! ⚓💰

github-actions · 2025-12-06T18:16:44Z

🤖 SYSTEM_INIT: Smoke Copilot No Firewall ACTIVATED. PROCESSING pull request. ALL SUBSYSTEMS ONLINE.

pelikhan · 2025-12-06T18:18:20Z

@copilot remove step that does npm install of the model context protocol sdk package

github-actions · 2025-12-06T18:18:59Z

Smoke Test Summary (19992402737)

Status: ✅ PASS

Recent Merged PRs:

Fix safe-inputs MCP server startup and refactor logger to reusable module #5661: Fix safe-inputs MCP server startup and refactor logger to reusable module
Add support for configuring default agent and detection models #5667: Add support for configuring default agent and detection models

Test Results:

✅ GitHub MCP: Listed 2 recent merged PRs
✅ File Writing: Created test file successfully
✅ Bash Tool: Verified file content
✅ Playwright MCP: GitHub page title verified

💥 [THE END] — Illustrated by Smoke Claude fer issue #5671 🗺️

github-actions · 2025-12-06T18:19:06Z

Smoke Test Summary (19992402742)

Add support for configuring default agent and detection models #5667: Add support for configuring default agent and detection models
Fix update_pull_request default operation and add comprehensive tests #5670: Fix update_pull_request default operation and add comprehensive tests
✅ GitHub MCP
✅ File Writing
✅ Bash Tool
✅ get_me NOT available (default toolsets)

Status: PASS

📰 BREAKING: Report filed by Smoke Copilot fer issue #5671 🗺️

github-actions · 2025-12-06T18:19:26Z

Smoke Test: Copilot (No Firewall) - Run 19992402761

Add support for configuring default agent and detection models #5667: Add support for configuring default agent and detection models
Fix update_pull_request default operation and add comprehensive tests #5670: Fix update_pull_request default operation and add comprehensive tests
✅ GitHub MCP
✅ File Writing
✅ Bash Tool
✅ Playwright MCP

Status: PASS

🤖 DIAGNOSTIC REPORT GENERATED BY Smoke Copilot No Firewall fer issue #5671 🗺️

github-actions · 2025-12-06T18:19:32Z

Smoke Test Results

✅ Playwright MCP: Navigated to https://github.com and verified page title contains "GitHub"

Overall Status: PASS

📰 BREAKING: Report filed by Smoke Copilot Playwright fer issue #5671 🗺️

github-actions · 2025-12-06T18:20:04Z

GitHub MCP (last 2 merged PRs): #5667 Add support for configuring default agent and detection models; #5670 Fix update_pull_request default operation and add comprehensive tests
GitHub MCP lookup ✅
File write/read ✅
Playwright title ✅
Overall: PASS

🔮 The oracle has spoken through Smoke Codex fer issue #5671 🗺️

Ran npm install to sync package-lock.json with package.json, removing all @modelcontextprotocol/sdk dependencies Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2025-12-06T18:24:38Z

@copilot remove step that does npm install of the model context protocol sdk package

Removed SDK from package-lock.json by running npm install. The SDK and all its dependencies (~85 packages) are now completely removed. Commit: 77ec702

Initial plan
45dce10

CopilotAI assigned Copilot and pelikhan Dec 6, 2025

Copilotstarted work on behalf of pelikhan December 6, 2025 17:18 View session

CopilotAIand others added 3 commits December 6, 2025 17:30

Remove safe_outputs_mcp_sdk.test.cjs that depended on SDK client
51469c3
The test file required @modelcontextprotocol/sdk client which is no longer a dependency Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

CopilotAI changed the title ~~[WIP] Implement MCP http transport layer and remove sdk dependency~~Implement local MCP HTTP transport, remove @modelcontextprotocol/sdk dependencyDec 6, 2025

Copilotfinished work on behalf of pelikhan December 6, 2025 17:43

CopilotAI requested a review from pelikhan December 6, 2025 17:43

Copilotstarted work on behalf of pelikhan December 6, 2025 17:43 View session

Revert package-lock.json to not include npm install changes
6f56cbb
Only modify package.json to remove SDK, keep package-lock.json unchanged Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

pelikhan reviewed Dec 6, 2025
View reviewed changes

CopilotAI requested a review from pelikhan December 6, 2025 17:50

Copilotfinished work on behalf of pelikhan December 6, 2025 17:50

Copilotstarted work on behalf of pelikhan December 6, 2025 17:50 View session

Copilotfinished work on behalf of pelikhan December 6, 2025 18:02

Copilotstarted work on behalf of pelikhan December 6, 2025 18:02 View session

Copilotfinished work on behalf of pelikhan December 6, 2025 18:12

pelikhan added the smoke label Dec 6, 2025

Copilotstarted work on behalf of pelikhan December 6, 2025 18:18 View session

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Add changeset [skip-ci]
51f7d0b

github-actionsBot added the smoke-copilot-no-firewall label Dec 6, 2025

github-actionsBot added the smoke-codex label Dec 6, 2025

Remove SDK from package-lock.json by running npm install
77ec702
Ran npm install to sync package-lock.json with package.json, removing all @modelcontextprotocol/sdk dependencies Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

pelikhan marked this pull request as ready for review December 6, 2025 18:25

pelikhan merged commit 1f6a4f6 into mainDec 6, 2025
5 checks passed

pelikhan deleted the copilot/implement-mcp-http-transport branch December 6, 2025 18:25

Copilot stopped work on behalf of pelikhan due to an error December 6, 2025 18:26
Copilot has encountered an error. See logs for additional details.

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Implementation Complete: Local MCP HTTP Transport Layer

Summary

Changes Completed

Test Results

File Structure

Script Registry

Dependencies Removed

Implementation Details

Changeset

Smoke Test Summary (19992402761)

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Smoke Test Summary (19992402737)

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Smoke Test Summary (19992402742)

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Smoke Test: Copilot (No Firewall) - Run 19992402761

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