The table of DESIGN 6.1 with what the work since added: 26 rows in four
groups (discovery, messages, directives, calls and types), each with the
behaviour of 1.5.2, the one of 2.0, what to do and the test that pins it.
Three rows are pinned by no test and say so: the order of the keys in the
JSON text and the two toJSON() types.
One change of the design is listed as not done: the 1.x temperature
helpers do not round the converted Celsius value.
The file feeds the migration section of the readme and the changelog.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
