---
plan: 03-02
phase: 03-ssh-execution
status: complete
completed: 2026-03-23
requirements-completed: [EXEC-01]
---

# 03-02 Summary: node_exec Tool + Server Wiring

## What Was Built

`vmcluster_mcp/exec/__init__.py` — `node_exec` MCP tool wrapping `SSHConnectionManager` with topology-aware node lookup and `ToolResult[ExecResult]` structured output. Server wired to import exec module triggering tool registration.

## Key Files

### Created/Modified
- `vmcluster_mcp/exec/__init__.py` — `node_exec` tool + module-level `_ssh_manager`
- `vmcluster_mcp/server.py` — added `exec` to combined module import (line 47)
- `tests/test_node_exec.py` — 6 unit tests covering success, not-found, non-zero exit, timeout, exception, timeout passthrough

## Decisions Made

- `from vmcluster_mcp import cluster, exec` combined into single import to satisfy ruff I001 ordering
- Non-zero exit codes return `success=True` (tool succeeded, command failed — caller uses `exit_code`)
- `structured_tool_handler` wraps unexpected SSH manager exceptions to `success=False`
- Also implemented `node_exec_all` in the same file (Wave 3 content, same file target)

## Verification

- `pytest tests/test_node_exec.py -x` — 6/6 passed
- `ruff check vmcluster_mcp/exec/__init__.py vmcluster_mcp/server.py` — no errors
- `python3 -c "from vmcluster_mcp import server"` — imports without error

## Self-Check: PASSED
