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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial
Home / Reference / Settings keys

handback

setting never mined JSON

A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Subagent completion results now carry a 'handback' payload for non-top-level agents

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.267.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 159on this box, as of v2.1.319
Written about v2.1.267 first named in a changelog, 9 Sep 2026

In the changelogs

5

Releases whose published page names handback.

  1. v2.1.292
    SDK task notifications can carry a subagent's handback report

    The SDK's background-task notification has two new optional fields, handback and handback_report, for subagent reports

    found in this entry's text

  2. v2.1.284
    SDK tool results can carry a subagent's full hand-back report

    A new internal handbackReport field carries a subagent's full report and any auto-mode warning for apps to display

    found in this entry's text

  3. v2.1.267
    Subagent completion result now carries a 'handback' payload

    Subagent completion results now carry a 'handback' payload for non-top-level agents

    found in this entry's text

  4. v2.1.267
    Agent tool completion gains a 'handback' delivery mechanism

    Agent tool completion adds a 'handback' mechanism to deliver results to the calling agent

    named in this entry, found in this entry's text

  5. v2.1.267
    Sub-agent auto-mode classification now skips or clears output based on a 'handback' outcome

    Sub-agent output classification in auto mode now depends on a new handback outcome

    found in this entry's text

First cited

0

No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.

Presence across releases

0

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.

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