• Added the --ignore flag to validate. #4385
• Added validation GR106, to ensure every modified test playbook is used by at least one content item. #4446
• Added a new pre-commit hook to prevent Python files from disabling mypy checks in the file level. #4405
• Added a new optional field, marketplaces, in the release notes config (e.g. 1_2_3.json). Use it to choose marketplaces where breaking changes apply. When a list is not provided, the default is all marketplaces. Supports aggregated release notes and retroactive editing. #4483
• Added validation PB127 that verifies default keys exist where marketplace suffix keys exist in playbooks. (e.g. using description:xsoar now requires description). #4401
• Modified the unify and prepare-content commands to add a demisto.debug logging of the pack name and version, in Python files. #4437
• Fixed an issue where PA102 failed when on valid modeling rules. #4497
• Fixed an issue where reusing the content graph after a long period of inactivity resulted in a 409 error. #4495
• Added a support attribute to all content items in the content graph. #4430
• Locked the nltk version to 3.8.1, since 3.8.2 was surprisingly removed from PyPI. No effect on demisto-SDK users. #4496