append
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.
Transcript writing can be redirected to a different storage layer, but nothing turns that on here.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.222.
In the changelogs
17Releases whose published page names append.
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v2.1.311
Hooks runtime skips needless work, with two variables to turn this off
The hooks runtime now skips work when only default handlers apply; two environment variables switch the shortcuts off
found in this entry's text
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v2.1.300
Plugin mods gain a prompt-change event and richer permission decisions
Plugin mods get a
prompt.changeevent, and permission decisions can now name a setting and a deciderfound in this entry's text
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v2.1.299
Plugin hook modules get more events and organization policy limits
Plugin hook modules can respond to more events, while plugins people install themselves face limits where an organization manages Claude Code
found in this entry's text
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v2.1.293
Session append for code-based hooks, and several small permission and sandbox changes
Hook code can call session.append next to session.send, and file-write checks, the sandbox and hook reporting get small changes
found in this entry's text
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v2.1.285
New names for MCP connections and appending to a session
Three new names appear for connecting to MCP, appending to a session and a plain MCP server call, next to existing ones
found in this entry's text
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v2.1.285
SDK sessions accept requests to drive the terminal interface
Programs driving Claude Code can now send requests to press, type, select, scroll and show or close panes in its interface
found in this entry's text
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v2.1.275
Post-turn memory: new 'memory' settings layer and MCP memory tool with read/write/append/delete, gated by CLAUDE_CODE_POST_TURN_MEMORY
A new 'memory' settings layer and MCP memory tool let Claude write, read, and edit notes across turns
found in this entry's text
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v2.1.275
New plugin hook API: $.prompt.read
New plugin hook API lets plugins read the current text and cursor position in the prompt box
found in this entry's text
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v2.1.275
New settings layer 'memory' and edit modes replace/append/insert
Settings gained a new 'memory' layer plus replace/append/insert edit modes
named in this entry, found in this entry's text
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v2.1.275
Slash-command drafts can now be filled by insertion or append, not just full replace
Text can now be appended or inserted into the input box draft, not just fully replaced
found in this entry's text
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v2.1.267
Plugin hook modules gain a resolved 'tier' controlling next.to() ordering
Plugin hooks can now be assigned a resolved ordering tier that next.to() calls are validated against
found in this entry's text
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v2.1.259
Background/local-shell task delivery can now append to the same assistant turn instead of always starting a new turn
A finished background task's result can now be appended into the current assistant turn instead of always starting a new one.
found in this entry's text
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v2.1.225
Error redaction covers invalid HTTP header messages
Error and telemetry text now scrubs invalid HTTP header values so they can't leak into reports.
found in this entry's text
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v2.1.222
Transcript writes and head/tail reads can go through the v5 storage backend
Transcript writing can be redirected to a different storage layer, but nothing turns that on here.
found in this entry's text
- v2.1.119
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v2.1.92
Write Tool Prompt Update
found in this entry's text
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v2.1.91
Write Tool Append Mode [Gradual Rollout]
found in this entry's text
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.