process.env
A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Small polish: credit labels, an extra help link, bigger artifact fetch limit, safer MCP environment handling.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.219.
In the changelogs
14Releases whose published page names process.env.
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v2.1.281
DEBUG_CLAUDE_AGENT_SDK read from live process.env with truthy parsing
DEBUG_CLAUDE_AGENT_SDKis now read from the current environment each time and parsed as on or offfound in this entry's text
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v2.1.267
New process.env read/write primitive for tools
New internal helpers let Claude read and set process environment variables
found in this entry's text, named in this entry
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v2.1.248
Ink app shell, MCP client and Skill tool moved to top-level definitions
The Ink shell, MCP client and Skill tool are now defined at load time.
found in this entry's text
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v2.1.232
Environment variables read through one typed table instead of scattered
process.envlookupsEnvironment variables are now read through one typed table, with the same names and behaviour.
found in this entry's text
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v2.1.232
More environment variables read through the central accessor
More environment variables go through the central registry that handles allowlisting and scrubbing.
found in this entry's text
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v2.1.228
Environment variables read through one typed accessor
Environment flags are now parsed centrally, so values are compared to explicit true or false.
found in this entry's text
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v2.1.228
About 220 more environment variables move to the typed registry
About 220 environment variables now parse and validate in one place, including bounds checks.
found in this entry's text
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v2.1.223
Host-orchestrated env var protection is case-insensitive
On Windows, differently-cased environment variable names can no longer override ones the host has claimed.
found in this entry's text
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v2.1.221
Artifact credentials and artifact base URLs are stripped from child process environments
Artifact tokens and artifact base URLs no longer leak into processes Claude spawns.
found in this entry's text
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v2.1.219
Smaller adjustments
Small polish: credit labels, an extra help link, bigger artifact fetch limit, safer MCP environment handling.
found in this entry's text
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v2.1.70
CA Certificate Configuration from Settings
found in this entry's text
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v2.1.3
Incremental TUI (tengu_sumi)
found in this entry's text
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v2.0.41
Conductor App Detection
found in this entry's text
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v2.0.28
Ripgrep Binary Loading Flexibility
found in this entry's text
First cited
7The earliest release whose published evidence quoted process.env was v2.1.3, 9 Jan 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.
1 further span in the ledger name it. The list above is the earliest first and stops at 6.
Presence across releases
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
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 settings key does. All settings keys.