ci: validate every member with mcpp 2026.9.30.2; latest_mcpp -> 2026.9.30.2

mcpp 2026.9.30.2 (mcpp-community/mcpp#745, #747): a build exits after ninja, the status row counts the work of the build, planning walks each package tree once, a vendored xlings is replaced from the newest source, a module name is unique within one program, a BMI served from the global cache waits for the modules it imports that the build compiles, a selected workspace member declares as the root, and the clang MSVC row states its compiler version. The release changes no descriptor grammar; min_mcpp is unchanged.

Author: Sunrisepeak

.github/workflows/validate.yml

@@ -412,7 +412,16 @@ env:
   # does work, the live display is drawn in one write, a path or git
   # dependency's bare key states only its short name, and the lock file keeps
   # one entry per identity.
-  MCPP_VERSION: "2026.9.30.1"
+  #
+  # 2026.9.30.2 (mcpp-community/mcpp#745): a build exits after ninja, the
+  # status row counts the work of the build, planning walks each package tree
+  # once, a vendored xlings is replaced from the newest source (#744), a
+  # module name is unique within one program rather than one build (#732),
+  # a BMI served from the global cache waits for the modules it imports that
+  # the build compiles, a selected workspace member declares as the root
+  # (mcpp-community/mcpp#747), and the clang MSVC row states its compiler
+  # version (#746).
+  MCPP_VERSION: "2026.9.30.2"
 
 jobs:
   lint:

index.toml

@@ -151,7 +151,14 @@
 # which runs every member on every platform with it. The release changes no
 # descriptor grammar; the build's human output changes again, and no check
 # here reads it.
+# ── 2026-09-30: latest_mcpp -> 2026.9.30.2, min_mcpp unchanged ─────────────
+#
+# Moved in the pull request that moves validate.yml's pin to 2026.9.30.2,
+# which runs every member on every platform with it. The release changes no
+# descriptor grammar. A module name is resolved in the importing package's
+# closure, and no member provides a module name another member provides, so
+# every member's build directory is laid out as before.
 [index]
 spec        = "1"
 min_mcpp    = "2026.9.18.3"
-latest_mcpp = "2026.9.30.1"
+latest_mcpp = "2026.9.30.2"