experimental

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.

What it is

Presence across releases

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.

Changelog entries naming it

1. v2.1.248Agents can set their own prompt cache lifetime in frontmatter

   An agent file can set its own prompt cache lifetime under experimental cacheTtl.

   named in this entry

Documentation pages

• beta-headers mentions it Claude Developer Platform
• routines-fire mentions it Claude Developer Platform
• apple-foundation-models mentions it Claude Developer Platform
• overview mentions it Claude Developer Platform
• Escalate hard decisions with the advisor tool mentions it Claude Code CLI
• Securely deploying AI agents mentions it Claude Code CLI
• Work with sessions mentions it Claude Code CLI
• Scale to many tools with tool search mentions it Claude Code CLI
• Agent SDK reference - TypeScript mentions it Claude Code CLI
• TypeScript SDK V2 session API (removed) mentions it Claude Code CLI
• Orchestrate teams of Claude Code sessions mentions it Claude Code CLI
• Run agents in parallel mentions it Claude Code CLI

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

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.