workflow/ and _workflows/ are retired historical implementations, archived by explicit approval under ADR 0007. New development uses the develop-workflow skill.

Their source and tests are retained for reference, excluded from active workspaces, typechecking, and root test commands. Historical source still contains relative imports into the former extensions/shared location and workspace dependency declarations; the archive is not a runnable or installable package set. To investigate the runnable historical layout, inspect commit fee0d44e2ddd7a982e94ebf99117f69bb9bae78e in a separate checkout rather than wiring archived files into the active runtime.

Historical plans and ADRs retain their original paths as evidence. The separate scenario and real-change pilot validation TODO remains open.