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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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tengu_dispatch_header_fallback

flag never mined JSON

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

Side-query API requests now retry once without the side-query header on certain failures.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.260.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 149on this box, as of v2.1.308
Written about v2.1.260 first named in a changelog, 3 Sep 2026

In the changelogs

3

Releases whose published page names tengu_dispatch_header_fallback.

  1. v2.1.281
    tengu_api_success gains a dispatch field

    Usage data for API calls now includes a dispatch value, which defaults to "none"

    found in this entry's text

  2. v2.1.281
    Side-query dispatch-header fallback broadened, and dispatch recorded on success

    A failed side query can now be resent once with a fixed dispatch value in more cases, including 503s, timeouts, conflicts and rate limits

    found in this entry's text

  3. v2.1.260
    API dispatch requests can now include a side-query header with fallback retry

    Side-query API requests now retry once without the side-query header on certain failures.

    gate cited by this entry

Gate readings

0

No release here has a gate table behind it for this flag. Most published releases have none at all: the readings exist only for versions the pipeline captured flag state on.

First cited

1

The earliest release whose published evidence quoted tengu_dispatch_header_fallback was v2.1.260, 3 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
v2.1.2603 Sep 2026tengu_dispatch_header_fallback

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 feature flag does. All feature flags.

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