CLAUDE_CODE_ENVIRONMENT_KIND
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
Long sessions can pick up fresh credentials pushed over the live connection instead of dropping out.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.221.
Presence across releases
| Releases | Reading | Declared type | Default |
|---|---|---|---|
| 2.1.245 – 2.1.250 5 releases | never mined | — | — |
| 2.1.160 – 2.1.243 75 releases | in the build | str | — |
| 2.1.138 – 2.1.159 20 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
-
v2.1.248MCP errors sent to Remote Control clients are filtered to a fixed list
In bridge mode, unknown MCP errors are collapsed to "connection failed" for remote clients.
named in this entry
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v2.1.248SDK stream transport can re-read auth headers, except in managed environments
The SDK stream transport can re-read auth headers, but not in managed environments.
named in this entry
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v2.1.248Bridge-mode redaction now also requires a transport that persists output
Bridge-mode redaction now only kicks in when your transport actually persists sent output.
named in this entry
-
v2.1.248get_settings is refused on remote connections
Remote clients can no longer read back your model, effort or settings-file errors.
named in this entry
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v2.1.237Poll tool drains queued harness events and reports who sent them
Claude can pull in queued messages from other sessions, stamped with who sent them, but only behind an env var.
named in this entry
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v2.1.234Two more environment variables handled for child sessions
Two environment variables for project directory name and environment kind now pass to or get scrubbed from child sessions.
named in this entry
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v2.1.227Remote worker sessions now sync the working directory both ways around every turn
Remote worker sessions now sync your working directory both ways around every turn.
named in this entry
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v2.1.224Directory sync apply starts with the working-file syncer
Startup also starts a directory sync apply step alongside the working-file syncer in normal local sessions.
named in this entry
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v2.1.221CCR client can adopt refreshed auth pushed over the event stream
Long sessions can pick up fresh credentials pushed over the live connection instead of dropping out.
named in this entry
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v2.1.221Web sessions can adopt refreshed credentials from the heartbeat
Web sessions can swap in a refreshed credential mid-run instead of waiting for the old one to expire.
named in this entry
-
v2.1.221Headless MCP startup wait reworked
Headless runs decide more carefully whether to wait for MCP servers before starting.
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 claude_code_environment, up to twelve of them.
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.