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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.319 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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appendMessages

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.

Headless SDK sessions get a new appendMessages method to inject messages

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.269.

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 v2.1.269 first named in a changelog, 11 Sep 2026

In the changelogs

1

Releases whose published page names appendMessages.

  1. v2.1.269
    Headless SDK sessions gain an appendMessages method

    Headless SDK sessions get a new appendMessages method to inject messages

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

First cited

1

The earliest release whose published evidence quoted appendMessages was v2.1.269, 11 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.

ReleaseDateThe span that was quoted
v2.1.26911 Sep 2026appendMessages: (Je) => {

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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