CLAUDE_CODE_HOVER_REST
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.238, including the newest one read.
Plaintext credential reads could come from memory instead of the file, but only under off-by-default storage.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.238.
In the changelogs
9Releases whose published page names CLAUDE_CODE_HOVER_REST.
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v2.1.304
Teammate mailboxes in diskless sessions now explain why nothing was read or written
When a diskless session has no storage for teammate messages, Claude Code now logs that nothing was read or written and lists the likely causes
found in this entry's text
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v2.1.299
Diskless sessions no longer fall back to reading config from local disk
With
CLAUDE_CODE_HOVER_RESTon, a diskless session loads config only from its storage service, uses defaults if that fails, and skips backupsfound in this entry's text, named in this entry
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v2.1.248
An in-memory storage backend is bundled but off by default
A full in-memory storage backend ships, off unless you set an environment variable.
named in this entry, found in this entry's text
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v2.1.248
A memory-only config write mode exists, and nothing in this build turns it on
Config can save to memory only, but nothing in this build enables that mode.
found in this entry's text
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v2.1.242
On-disk storage layer gains symlink and permission rules per data type
Where Claude Code stores your data gains per-type symlink and file-permission rules, off by default.
named in this entry, found in this entry's text
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v2.1.238
Plaintext credential store gained an in-process cache
Plaintext credential reads could come from memory instead of the file, but only under off-by-default storage.
named in this entry, found in this entry's text
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v2.1.238
A second plugin asset-cache cleaner exists, switched off in this build
An alternative plugin cache cleaner exists, but you still get the old file-timestamp scan.
named in this entry, found in this entry's text
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v2.1.238
CLAUDE_CODE_HOVER_RESTgives a local override for the new credential and settings storageYou can pin the new credential and settings storage backend yourself with one environment variable.
named in this entry, found in this entry's text
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v2.1.238
The v5 storage choice reads the environment variable first
An environment variable now takes priority over the server flag when picking the new storage backend.
named in this entry, found in this entry's text
First cited
3The earliest release whose published evidence quoted CLAUDE_CODE_HOVER_REST was v2.1.238, 20 Aug 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.
Presence across releases
1Build by build
61One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
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 environment variable does. All environment variables.