Retain inspection file owners before a target lease exists and gate replacement on cleanup. Reuse the streaming string inventory owner and the same installation adapter in native profiling. Validate 80 related tests, real SSH value/source parity in both MCP adapters, injected descriptor/native cleanup retries, zlib SDK immutability and native profiling. Keep historical model costs pinned to their measured runtime. Co-authored-by: gensokyo-dev <342580529+gensokyo-dev@users.noreply.github.com> Co-authored-by: Kaoru0822 <208281322+kaoru0822-kitauji@users.noreply.github.com>