CLAUDE_CODE_SLACK_TAG_TOKEN
A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.234 and was gone by v2.1.257.
More Slack tokens and webhook URLs are detected and redacted, and one token is hidden from child processes.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.234.
In the changelogs
3Releases whose published page names CLAUDE_CODE_SLACK_TAG_TOKEN.
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v2.1.234
More Slack secret patterns, and the new Slack tag token is kept out of child processes
More Slack tokens and webhook URLs are detected and redacted, and one token is hidden from child processes.
named in this entry, found in this entry's text
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v2.1.234
Slack tagging wiring in the environment, status line and tool refresh
A Slack tag token env var is treated as auth, stripped from subprocesses, and gets a status-line segment.
named in this entry, found in this entry's text
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v2.1.234
Groundwork for a Slack tagging integration, present but inert
Session and message records now carry Slack tagging plumbing, but nothing turns it on.
named in this entry, found in this entry's text
First cited
1The earliest release whose published evidence quoted CLAUDE_CODE_SLACK_TAG_TOKEN was v2.1.234, 17 Aug 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.
Presence across releases
2Build by build
64One 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.