# TASK-125-04: Transport Mode Regression Pack and Docs

**Parent:** [TASK-125](./TASK-125_MCP_Transport_Mode_Switching_And_Session_Diagnostics.md)  
**Status:** ✅ Done  
**Priority:** 🟡 Medium

**Completion Summary:** Added focused regression coverage for transport-mode
bootstrap and session diagnostics, plus docs/config updates for the supported
`stdio` and `streamable` modes.

## Objective

Protect the new transport-mode switch and session diagnostics with focused
regression coverage and operator docs.

## Business Problem

Transport/runtime work is easy to ship in a partially documented state, which
then leaves the repo with:

- code paths that only maintainers know how to use
- config examples that drift from reality
- weak regression protection for transport-specific session failures

## Technical Direction

Add focused tests and docs that cover:

- config selection for `stdio` vs `streamable`
- visible session diagnostics in operator-facing payloads
- docs/examples for switching modes intentionally during debugging

## Repository Touchpoints

- `tests/unit/adapters/mcp/`
- `README.md`
- `_docs/_MCP_SERVER/README.md`
- `_docs/_MCP_SERVER/MCP_CLIENT_CONFIG_EXAMPLES.md`
- `_docs/_TASKS/README.md`

## Acceptance Criteria

- transport mode selection has focused regression coverage
- session-ID diagnostics are covered by payload/docs tests
- docs explain how to switch transport modes for runtime debugging

## Docs To Update

- `README.md`
- `_docs/_MCP_SERVER/README.md`
- `_docs/_MCP_SERVER/MCP_CLIENT_CONFIG_EXAMPLES.md`

## Tests To Add/Update

- focused unit/docs regression coverage under `tests/unit/adapters/mcp/`

## Changelog Impact

- include in the parent task changelog entry when shipped
