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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
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durationMs

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.

API requests now carry a per-attempt request ID and log more detail about retries

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.268.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 123on this box, as of v2.1.280
Written about v2.1.205 first named in a changelog, 8 Jul 2026

In the changelogs

4

Releases whose published page names durationMs.

  1. v2.1.280
    SDK tool-result streaming can attach agentId/durationMs for Task-like tools

    Streamed tool results for the Task tool can now include an agent ID and duration

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

  2. v2.1.280
    Task delegation now carries usage stats forward

    Sub-task handoff now carries forward token, tool-use, and duration stats

    found in this entry's text

  3. v2.1.268
    API dispatch requests now carry a per-attempt client request ID and richer retry telemetry

    API requests now carry a per-attempt request ID and log more detail about retries

    found in this entry's text

  4. v2.1.205

First cited

3

The earliest release whose published evidence quoted durationMs was v2.1.273, 15 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
v2.1.27315 Sep 2026toolDuration: { toolName: e.name, durationMs: Cr }
v2.1.28022 Sep 2026...(typeof n === "string" && { agentId: n }), ...(typeof r === "number" && { durationMs: r }),
v2.1.28022 Sep 2026usage: { totalTokens: u, toolUses: w, durationMs: k }

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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