[Sunrisepeak]

The backend's patch 1.2.1 (backend-v1.2.1; the plugins stay 1.2.0, one series).

• mtest's cases as mtest reads them. The static cases of an mtest file come from mtest's own manifest, mcpplibs.mtest.manifest 0.3.0 (0.3.0: an object is a case, its type its kind; how a case is run stated with it mtest#4), instead of a reader of the backend's: an object (UTest parse{"parse", [] { ... }}, and Suite, CTS, E2E, Bench, or a suite type the file derives from one) is a case, and so is each "name"_test it declares, under its name. A file in mtest 0.3.0's form shows its cases before it is built. The backend's own reading of mtest literals and suites is removed (depend, not copy).
• tests/test_testing.cpp holds the 0.3 forms: objects, a derived suite type, nested cases, a commented literal.

Design: mcpp-community/mcpp .agents/docs/2026-11-08-ecosystem-top-level-design.md W9.

Co-authored-by: speak-agent [email protected]