Under the hood
Useful1 Signal1
Artifact tool results are rendered through a handler lookup instead of a long inline chain.
What's wrong with this entry?
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What
Artifact tool results are now rendered by looking up a handler first and handing anything not rendered inline to a host-provided renderer. Capability is unchanged; the database read and write branches simply moved out of the inline mapper.
Evidence
host.mapToolResultToToolResultBlockParam
Strings lifted out of the shipped bundle, so the claim above can be checked against them.