07b36c148 made document and procedure completion read only from an
already-started provider client. Two checks still completed right after
opening a target, so they observed an empty cold result:
- promptCompletion.test.ts used a fixture client without executeIfReady
and never ran an ordinary operation, so the composite provider had not
created a client yet.
- The packaged MCP smoke expected live completions on non-Linux hosts
immediately after open_binary, before current_document started Hopper.
Both now assert the cold result is empty, ready the provider through an
ordinary operation, and then assert the unchanged live candidates.
Fixes#2123
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
