- HIGH-A: resolveEntry now uses promise-cache pattern so concurrent callers serialize on a single in-flight build, eliminating duplicate key material in heap and duplicate DB round-trips - HIGH-B: flushPeer destroys the evicted undici Agent so stale TLS connections close on cert rotation - MED-C: add regression test for PEER_MISCONFIGURED when STEP_CA_ROOT_CERT_PATH is unset Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>