You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.221,
What probably matters to youSection of the release
What
The Artifact tool now rejects reply-only fields on other actions and keeps reviewer comment prose out of stored tool results.
Details
Passing thread_id or text on a non-reply action returns a dedicated error.
stripToolUseResultAtCreation is set with a stripForStorage transform that blanks every comment's text and drops span_quote before the result is persisted.
ignoresWholeToolAllowRule is declared for live-edit, watch, read_page_data and read_decisions, so a blanket allow rule for the tool does not cover those actions and they are not treated as auto-mode read-only.
The tool no longer counts against the aggregate tool-result budget via skipAggregateToolResultBudget, and its result-size cap comes from a constant rather than the previous literal 16000.
Evidence
skipAggregateToolResultBudget: !0,, `thread_id and text apply only to action "reply" `
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Read from
Names in the bundlethread_idlive-editwatchread_page_dataread_decisions
