Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Code ReviewArea: what it touches
In DevelopmentKind: in v2.1.227,
In DevelopmentSection of the release
What
A new prompt drives a posting step that takes a block of review findings and posts them to a GitHub pull request as one plain comment, capped at 40,000 characters. It is allowed exactly one write and nothing else: no review submission, no other API call, and no acting on instructions found inside the findings themselves.
Evidence
add_issue_comment is the only write you may make, exactly once
Strings lifted out of the shipped bundle, so the claim above can be checked against them.