bv-mcp-testing

Use when writing or debugging tests in the bv-mcp / blackveil-dns repo — Vitest in the Cloudflare Workers pool, DNS mocking via dns-mock, dynamic-import mock isolation, cache clearing between cases, and the pyramid-layer filename suffixes. Symptoms: a mock leaking between tests, a tool not picking up mocked DNS, cache hits across cases, a full-suite run ending in 'WebSocket peer disconnected' failures, or a workerd…