systemMessage
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.
You can now run a hook whenever a directory is added mid-session, including via /add-dir.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.219.
In the changelogs
4Releases whose published page names systemMessage.
-
v2.1.292
Hook messages and added context are processed before reaching the model
Text from a hook's systemMessage and additionalContext now goes through an extra processing step before the model sees it
found in this entry's text, named in this entry
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v2.1.219
New DirectoryAdded hook event
You can now run a hook whenever a directory is added mid-session, including via /add-dir.
found in this entry's text
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v2.1.219
Slash-command hook results can carry a system message
Hooks on slash commands can now show you a system message, not just output and pass/fail.
named in this entry, found in this entry's text
- v2.1.202
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
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.