Resolve one connected lineage and retain its root-to-parent capabilities. Backends validate ancestor identity/membership and refresh all policy metadata inside the same boundary as target validators and typed dispatch; hidden/replaced ancestors reject as NotFound without invocation or effects. Preserve pinned leaf and configured-root capabilities. Covers MR ANCESTOR_VISIBILITY_TOCTOU with HTTP memory and Linux replacement/budget/guard regressions; all T-19 workspace acceptance commands pass (Clippy via Nix shell).
Add 21 independent memory-backend external-style tests, both principal HTTP flows, atomic validator/target/effect checks, budgets and sanitized failures; document migration and implementer responsibilities. All T-19 acceptance commands pass; Clippy runs in the repository Nix development shell.
Separate pinned Linux backend, typed composition, coherent principal policy views and standard HTTP adapter. Refresh validators inside serialized execution and preserve default listener and effect boundaries. Linux/adapter and real-listener regressions pass.
Restrict interface order and operation descriptors without changing registry artifacts or dispatch codecs; prune hidden-only types/docs and support typed pre-dispatch provider rejection. Validated host contracts and the dependent workspace suite for T-19.
Disambiguate generated argument types when distinct operation names normalize to the same PascalCase form, and add the requested Number round-trip and collision regression coverage.
Add the wip-interface facade and proc-macro implementation for typed interface descriptors, DTO value codecs, validated dispatch, metadata extraction, and span-aware compile failures.
Hare