failureCode
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.
Command-built plugins record their command and output directory so moves can be detected.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.229.
In the changelogs
6Releases whose published page names failureCode.
-
v2.1.290
Plugin install can now refuse some plugins as not found
Installing a plugin can now stop with the
not_foundfailure code when a check on that plugin matchesfound in this entry's text
-
v2.1.281
Plugin install: new replace/switch options and directory-related failure reasons
Plugin install gains unfinished options for replacing an installed copy and four new failure reasons, all reported as a generic failure
found in this entry's text
-
v2.1.268
Plugins required by organization policy can no longer be disabled
Plugins marked required by organization policy can no longer be disabled from Claude Code
found in this entry's text
-
v2.1.268
Plugin enable/disable results now carry a machine-readable failureCode
Plugin enable/disable failures now return a machine-readable failureCode alongside the human-readable error message
found in this entry's text, named in this entry
-
v2.1.268
Org-required plugins can no longer be disabled/uninstalled, with new structured failure codes
Plugins your organization requires can no longer be disabled or uninstalled, and failures now report a specific reason code
found in this entry's text
-
v2.1.229
Command-sourced plugins record where their files came from
Command-built plugins record their command and output directory so moves can be detected.
found in this entry's text
First cited
9The earliest release whose published evidence quoted failureCode was v2.1.229, 12 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.
3 further spans 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.