ifVersion
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.
Artifact database gains a targeted str_replace edit operation, currently gated off
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.265.
In the changelogs
5Releases whose published page names ifVersion.
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v2.1.281
Plugin state store for the hooks-module runtime ($.state.get / state.set)
Plugin hooks modules gain
$.state.getand$.state.set, a versioned shared value store only a value's owner can writefound in this entry's text
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v2.1.267
Artifact database write_db batches now support per-entry version pins
Artifact database batch writes support version pins per individual entry
found in this entry's text, named in this entry
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v2.1.267
write_db now supports a 'delete' db_op with if_version
The write_db tool can now delete database entries, and set/delete support an ifVersion check
found in this entry's text, named in this entry
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v2.1.265
Artifact-database str_replace edit op, gated off by default
Artifact database gains a targeted str_replace edit operation, currently gated off
found in this entry's text
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v2.1.265
Artifact-database write gains a string-replace op and optimistic versioning
Artifact database writes gain a string-replace operation and version-checked writes
found in this entry's text
First cited
1The earliest release whose published evidence quoted ifVersion was v2.1.281, 23 Sep 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
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.