TypeScript 6 includes no @types unless a file imports from them, and the
issued dialect imports nothing from node. Type-checked on its own it did
not know Buffer, so the 5.1.0 release threw away a valid dialect as one
that does not type-check. The check config names node now.
A stable release without a dialect of its own now ships the one on main only while that one has 90 days left; dialect 0 or less stops the run before anything is committed, unless allow_stale_dialect is ticked. Fetching and checking moved into registration-dialect.yml, which never fails its caller and also type-checks the module under the strict config and lints it with --max-warnings 0, since the bump commit skips CI. The bump and everything after it run whatever became of the dialect job. Prereleases ask the issuer for a dialect of their -pre.N version and build it into the image without committing it. The release check reads the module token by token against an allowlist of keywords, globals and member names, refuses any assignment to a property, computed access and regular expressions, and names Object, JSON and defineProperty among the forbidden. The issuer's kitchen-sink sample is gone; the tests use a hand-written dialect instead.
Maurice