Announcement issue for plugin API changes

The mypy plugin interface is experimental, unstable, and prone to change. In particular, there are no guarantees about backwards compatibility. Backwards incompatible changes may be made without a deprecation period.

We will, however, attempt to announce breaking changes in this issue, so that plugin developers can subscribe to this issue and be notified.

Breaking changes fall into three broad categories:

1. Changes to the actual plugin API itself
2. Changes to parts of the "implicit plugin API"---that is, internals that plugins are likely to use (representation of types, etc).
3. Changes to things that really aren't plausibly part of the plugin API (but, of course, that some plugins might be using anyway...)

Issues in category 1 will be consistently announced here, issues in category 3 will probably be announced here only if problems are reported, and issues in category 2 will be somewhere in the middle.

Non viene indicato alcun file del repository, test o punto di ingresso. Leggi il corpo dell’issue e gli annunci della plugin API; non esiste alcuna condizione di completamento definita dall’implementazione, quindi considerala un tracker esclusivamente informativo e non un primo contributo.