Under the hood
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Assistant transcripts can now include a result_from block linking a tool result to host classifier context
What
When Claude Code reconstructs the assistant's transcript, it can now include a new kind of content block called result_from, alongside the existing outcome and host_context blocks. It is built from a new internal lookup of tool host result lines and associates a specific tool call with a host.
Why
This is an internal transcript-format addition, so it doesn't change what you see directly, but it lays groundwork for tracking which host produced a given tool result.
Names in the bundleresult_from
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What practical effect this has for users, or what a 'host' refers to here, is not stated.