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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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preflight.js

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.

Republishing an Artifact now supports a deadline for old copies and a reserved preflight.js hook that can block a bad publish

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 / 161on this box, as of v2.1.322
Written about v2.1.267 first named in a changelog, 9 Sep 2026

In the changelogs

2

Releases whose published page names preflight.js.

  1. v2.1.269
    Artifact tool schema gains read_page_data, capabilities/contract, and typed-Artifact catalog fields

    Artifact tool schema adds a read_page_data action plus capabilities, contract, and typed-catalog fields

    found in this entry's text

  2. v2.1.267
    Artifact republish gains a client-deadline mechanism and reserved preflight.js hook

    Republishing an Artifact now supports a deadline for old copies and a reserved preflight.js hook that can block a bad publish

    found in this entry's text

First cited

2

The earliest release whose published evidence quoted preflight.js was v2.1.267, 9 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
v2.1.2679 Sep 2026preflight.js` at the artifact root is reserved - it runs against open pages when you publish updates
v2.1.26911 Sep 2026preflight.js` at the artifact root is reserved

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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