Recover assistant turns that complete tool work without producing a visible final answer, while preserving intentional silent replies.
Use concrete tool-instance replay safety across embedded, Codex, and Copilot runtimes so unknown, mutating, async-started, and durable recall operations fail closed. Preserve genuine empty Codex final items without promoting commentary or tool-progress echoes.
Supersedes #90872. Thanks @fuller-stack-dev.
Co-authored-by: fuller-stack-dev <263060202+fuller-stack-dev@users.noreply.github.com>