As announced, Scintilla’s *FULL messages and structures are slated to completely replace the non-*FULL equivalents in Notepad++'s code base, somewhat ahead of Scintilla’s own timeline, in which version 6.0 would deprecate the non-*FULL messages, with 7.0 finally dropping them.
As explained in the template README, plugins developed from the api-v5.2.3 tagged revision or later will provide the new definitions.
2. Deprecation of all current DBGp versionsSince DBGp calls into SCI_GETTEXTRANGE, the removal of Scintilla’s non-*FULL APIs will cripple the core functionality of all released versions, both 32- and 64-bit, in a future N++ release.
The next version of DBGp will be forward- and backward-compatible: https://bitbucket.org/rdipardo/dbgp/commits/6e09a9d5586827f9d43f5f1403cbcd627837326b