AbstractCore v2.13.10

Fixed

• Task-only text generation selectors: generate(...) and agenerate(...) calls with
  output={"task": "text_generation"} now normalize through the public output selector contract as
  modality="text" and follow the normal chat/text generation path instead of being treated as
  generated media or non-chat dispatch.

Changed

• Backlog completion: moved the task-only text generation output-normalization proposal to
  completed with an implementation report, acceptance-criteria results, and validation notes.