XDG_RUNTIME_DIR
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.138, including the newest one read.
What it is
The messaging socket lives under XDG_RUNTIME_DIR with locked-down permissions and refuses to hijack a live one.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.224.
Presence across releases
| Releases | Reading | Declared type | Default |
|---|---|---|---|
| 2.1.245 – 2.1.251 6 releases | never mined | — | — |
| 2.1.162 – 2.1.243 73 releases | in the build | str | — |
| 2.1.138 – 2.1.161 22 releases | in the build | — | — |
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
-
v2.1.224Local messaging socket: where it lives, who can read it, and refusing to steal a live one
The messaging socket lives under XDG_RUNTIME_DIR with locked-down permissions and refuses to hijack a live one.
named in this entry
Documentation pages
None of Anthropic's documentation pages this site has a copy of carries this name.
Names beside it
Every environment variable in the inventory starting xdg, up to twelve of them.
XDG_CONFIG_HOMERemote settings can now supply many more environment variables, including auth tokens and home directory paths. 2.1.138
XDG_DATA_HOMENo description from anybody. 2.1.208
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.