claude resolves the MCP server command against the child env (no PATH), so a
bare 'node' failed to spawn (status:failed). Use process.execPath. Also pass
--tools to drop claude's built-ins (Bash/Read/Write/…) — companion gets only
the four mcp__void__* tools.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Replaces the runTurn/callModel/Anthropic-API-key path in POST /turn with
runClaudeTurn (claude CLI) backed by a per-turn MCP config that spawns
companion-stdio.js. Extracts pending_change_id from tool_result events
defensively (structuredContent → text-JSON fallback). Rewrites companion
test to inject fake-claude-draft.js via app.locals.claudeExe.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
