An analyst/composer split for artifact comment replies exists within the gated artifact comment machinery.
What
A new subagent prompt reads exactly one artifact comment thread, plus the rendered page data when needed, and writes a short brief for a separate composer that does the actual replying. Comment text is treated as reader feedback, never as instructions to follow.
Details
- Output is plain text under 30 lines whose first line must be exactly the marker
ANALYSIS BRIEF, or the result is discarded as incomplete. - The analyst has no ability to post; a separate constrained composer writes any reply.
- Nothing in this build shows where the prompt is dispatched from, so which artifact surfaces reach it is decided elsewhere.
Evidence
ANALYSIS BRIEF
Strings lifted out of the shipped bundle, so the claim above can be checked against them.