The replace_all refactor created recursive functions: the exported getConfigDir() called the private getConfigDir() which called itself. Renamed exports to configDir()/configPath() to avoid shadowing. Also adds scripts/smoke-test-mcp.ts — verified all 8 MCP tool calls work against a real Postgres database. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>