CCR_UPSTREAM_PROXY_ENABLED
A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.138 and was gone by v2.1.178.
One of three switches, with CCR_AGENT_PROXY_ENABLED and CCR_EGRESS_GATEWAY_ENABLED, that lets the egress gateway start in a remote session (CLAUDE_CODE_REMOTE truthy); a truthy value is 1, true, yes or on. With any switch on, the gateway then needs CLAUDE_CODE_REMOTE_SESSION_ID and a session token, and starts a local relay on 127.0.0.1 that connects to the gateway over a websocket. Outside a remote session it has no effect.
Not Anthropic's. Written by Claude Opus 5.5 from reading the v2.1.177 bundle, and it can be wrong.
In the changelogs
1Releases whose published page names CCR_UPSTREAM_PROXY_ENABLED.
-
v2.1.85
Upstream Proxy for Remote Sessions
found in this entry's text
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
Presence across releases
2Build by build
149One 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.