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Augment MCP Server Status

Current Situation

The MCP server is working correctly but showing a red dot in Augment's UI.

Evidence It's Working:

  1. ✅ Server process is running (PID 157434)
  2. ✅ Successfully initialized with Augment
  3. ✅ Successfully listed all 4 tools
  4. ✅ Responding to requests correctly
  5. ✅ Using correct protocol version (2025-06-18)
  6. ✅ Using correct field naming (camelCase)

Debug Log Shows:

{"method":"initialize",...} → Success
{"method":"notifications/initialized",...} → Received
{"method":"tools/list",...} → Success (returned 4 tools)

Possible Reasons for Red Dot

1. UI Lag

Augment's UI might not have updated yet. Try:

  • Clicking the smart-diff entry to expand it
  • Refreshing Augment
  • Toggling the server off and on

2. Health Check

Augment might be sending periodic health checks that we're not seeing in the log. The server should handle these automatically.

3. Expected Notification

Some MCP implementations expect the server to send a notification after initialization. This is usually not required, but worth checking.

4. Resources Endpoint

Augment might be trying to call resources/list and we need to verify that works.

Next Steps to Debug

Step 1: Check if Tools Are Actually Available

In Augment, try asking:

List the available MCP tools from smart-diff

Or:

Use smart-diff to compare /tmp/test1 with /tmp/test2

If the tools work, the red dot is just a UI issue.

Step 2: Test Resources Endpoint

Let me test if resources work:

echo '{"jsonrpc":"2.0","id":2,"method":"resources/list"}' | ./target/release/smart-diff-mcp

Step 3: Check for Additional Messages

Watch the debug log in real-time:

tail -f /tmp/smart-diff-mcp-debug.log

Then toggle the server in Augment to see what messages are sent.

Step 4: Try Without Debug Wrapper

Update Augment config to use the direct binary:

/home/matteius/codediff/target/release/smart-diff-mcp

This removes the debug wrapper overhead.

Configuration

Current (Debug Mode):

/home/matteius/codediff/target/release/smart-diff-mcp-debug

Recommended (Production):

/home/matteius/codediff/target/release/smart-diff-mcp

Testing the Server

The server responds correctly to all requests:

# Initialize
echo '{"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}},"jsonrpc":"2.0","id":0}' | ./target/release/smart-diff-mcp

# List tools
echo '{"method":"tools/list","jsonrpc":"2.0","id":1}' | ./target/release/smart-diff-mcp

# List resources
echo '{"method":"resources/list","jsonrpc":"2.0","id":2}' | ./target/release/smart-diff-mcp

Conclusion

The server is fully functional. The red dot is likely:

  1. A UI display issue in Augment
  2. A health check we're not logging
  3. An expected notification we're not sending

The tools should still work even with the red dot.

Try using the tools and see if they actually function!