manifestSha256
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.
Admin-allowed plugin marketplaces must be pinned to a fixed version to use an installation preference other than "available"
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.281.
In the changelogs
4Releases whose published page names manifestSha256.
-
v2.1.281
Admin marketplace allowlist: installationPreference is clamped without a pin
Admin-allowed plugin marketplaces must be pinned to a fixed version to use an installation preference other than "available"
found in this entry's text
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v2.1.281
Cowork admin docs: missing manifestSha256 downgrades to 'available'; unreadable allowlist counts as empty
Cowork admin docs: a URL marketplace entry with no manifestSha256 is treated as available, and an unreadable allowlist counts as empty
named in this entry, found in this entry's text
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v2.1.281
Managed marketplace auto_install/required entries without a pin are treated as available
Managed
auto_installorrequiredmarketplace entries without a pin are treated asavailableand flagged as a config warningfound in this entry's text
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v2.1.281
Plugin marketplace schema drops SHA/manifest hash requirements for auto_install/required
Marketplace plugins set to auto_install or required no longer need a full commit SHA or a manifestSha256 hash
found in this entry's text
First cited
2The earliest release whose published evidence quoted manifestSha256 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.