CLAUDE_CODE_DISABLE_MTLS_RELOAD_ON_STALE_CONNECTION
A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.232 and was gone by v2.1.242.
What it is
Set to 1 to stop Claude Code from re-reading the [mTLS client certificate and key](/docs/en/network-config#mtls-authentication) when an API request fails with a connection-level error, such as a connection reset or a TLS handshake error. With the reload disabled, Claude Code loads rotated files only when it next applies settings or at the next startup. Requires Claude Code v2.1.232 or later
Anthropic's own wording. Read off Environment variables, captured 2026-08-28.
Presence across releases
| Releases | Reading | Declared type | Default |
|---|---|---|---|
| 2.1.245 – 2.1.250 5 releases | never mined | — | — |
| 2.1.242 – 2.1.243 2 releases | not in the build | — | — |
| 2.1.232 – 2.1.241 10 releases | in the build | bool | — |
A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.
Changelog entries naming it
-
v2.1.232Rotated client certificates are picked up after a stale connection
Rotated client certificates are picked up mid-session, so you no longer have to restart after a rotation.
named in this entry
Documentation pages
- Environment variables reference table Claude Code CLI
- Enterprise network configuration 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 environment variable does. All environment variables.