STDIO extension logging

[lily-de]

Through the MCP protocol, server logs can be surfaced to the client (in this case, goose). Being able to add logs to an MCP server and then see them in Goose can massively accelerate development.

Docs / code

• MCP debugging guide (some high level notes on logging here)
• PythonSDK server logging -- also look at session.py in server/

Protocol Flow for Logging

1. Capability Negotiation

Client                              Server
  |                                   |
  |        Initialize Request         |
  |--------------------------------->|
  | (includes ClientCapabilities)     |
  |                                  |
  |        Initialize Result         |
  |<---------------------------------|
  | (includes ServerCapabilities     |
  |  with logging: LoggingCapability)|
  |                                  |

2. Log Level Configuration (Optional)

Client                              Server  |                                   |
  |     logging/setLevel Request      |
  |--------------------------------->|
  |   (sets desired logging level)    |
  |                                  |

3. Log Message Flow

Client                              Server
  |                                   |
  |   notifications/message           |
  |<---------------------------------|
  | LoggingMessageNotification        |
  | {                                |
  |   level: "info",                 |
  |   logger: "component_name",      |
  |   data: "message"                |
  | }                                |