> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.ada.cx/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.ada.cx/_mcp/server.

# MCP: compare a change set against baseline in one call

An AI assistant connected over the MCP server can now compare a change set's performance against baseline in one call. Baseline is the set of conversations your live AI Agent handles, not attributed to any change set.

The new [`compare_changeset_metrics`](/mcp/tools/compare-changeset-metrics) tool takes a change set ID and a date range. It returns baseline and change set side-by-side for `containment_rate`, `resolution_rate`, `csat_rate`, and each enabled custom metric pass rate. Each metric row includes the absolute difference and the difference relative to baseline. Cohort conversation volume is included.

Before, an assistant called [`get_ada_metric`](/mcp/tools/get-ada-metric) twice per metric and aligned the results itself. One call now returns every metric for both cohorts with the difference computed.