State the existing discovery page and exact-name bounds using the validation constants. Isolate account apps and plugins in catalog trials by default, with an explicit opt-in and one shared feature policy for config and receipts.
* perf(eval): measure MCP catalog usage through real Codex sessions * fix(eval): control the active Codex code mode host * fix(eval): reject unavailable host controls without hiding client errors * test(eval): cover the supported default and actionable client errors * docs(eval): record pinned Codex catalog and real package measurements * fix(eval): pin matrix identity and retain failed trial observations --------- Co-authored-by: gensokyo-dev <gensokyo-dev@users.noreply.github.com>