Follow Discord
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

leanPrompt

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.

The Bash prompt caches its skill-command list per session and accepts lean and trimmed prompt variants.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.257.

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 v2.1.257 first named in a changelog, 1 Sep 2026

In the changelogs

4

Releases whose published page names leanPrompt.

  1. v2.1.277
    WebFetch tool description reworks its claude.ai-artifact exception into a general mode parameter

    WebFetch's internal prompt-building switched from a simple on/off flag to a named mode string

    found in this entry's text

  2. v2.1.274
    New bash-first prompt steer variant experiment slot

    A new bashFirstSteerVariant experiment slot was added, gated by tengu_cozy_teapot and overridable via CLAUDE_CODE_COZY_TEAPOT

    found in this entry's text

  3. v2.1.257
    Bash tool prompt now caches available skill commands and supports lean/trimmed prompt variants

    The Bash prompt caches its skill-command list per session and accepts lean and trimmed prompt variants.

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

  4. v2.1.257
    AskUserQuestion-style tool prompt gains a leanPrompt parameter

    The AskUserQuestion prompt now receives a lean-prompt flag that can suppress a guidance snippet.

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

First cited

1

The earliest release whose published evidence quoted leanPrompt was v2.1.257, 1 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
v2.1.2571 Sep 2026async prompt({ model: e, leanPrompt: n }) {

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.

Feedback