An artifact comment-thread analysis subagent sits behind CLAUDE_CODE_ARTIFACT_COMMENT_RESPONDER, off by default.
A new built-in subagent reads a single comment thread on an artifact, optionally with the rendered page, and returns an analysis brief. It cannot call any other tool, is capped at 6 turns, and its brief is thrown away if it gets truncated. It is off unless you set CLAUDE_CODE_ARTIFACT_COMMENT_RESPONDER; failing that it checks tengu_bracken_sluice, which falls back to false.
- The brief's first line must be exactly "ANALYSIS BRIEF" or it is not accepted.
- A separate small call classifies the newest human request in the thread as either
actorpipeline.
The comment-thread analyst is read-only and scoped to its one artifact and thread
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
tengu_bracken_sluice Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.227: off
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.227. It isn't a statement about your account. What a flag value here can and cannot tell you
New in this build: CLAUDE_CODE_ARTIFACT_COMMENT_RESPONDER