mode
A Claude Code settings key, read out of the shipped bundle. It was in the build from v2.1.138 and was gone by v2.1.284.
Programs driving Claude Code through the SDK now see more detail about background work and turn context.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.228.
In the changelogs
20Releases whose published page names mode.
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v2.1.309
Plugins that insert text into the prompt can now set the cursor position
The plugin hook that inserts text into your prompt now also passes on an optional cursor position
found in this entry's text
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v2.1.282
Web search instructions can be extended remotely, and a stray option is ignored
When fast web search is enabled, extra WebSearch tool instructions can be supplied remotely, and a
modevalue sent while it is off is droppedfound in this entry's text
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v2.1.281
Bridge stops work items that carry an unsupported mode
Remote Control now stops incoming work that carries an unsupported mode instead of trying to run it
found in this entry's text
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v2.1.281
Bridge debug logs hash IDs and sanitise values
Bridge debug logs now hash work and session IDs and hide JSON values and unusual type or mode text
found in this entry's text
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v2.1.280
Three new hidden CLI settings-edit commands for the VS Code extension
Three new hidden CLI commands let the VS Code extension edit skill, sandbox, and Chrome settings
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 'memory-mode' session log entry type has no writer call site
New 'memory-mode' session log entries are fully plumbed through loading and merging, but nothing yet writes them
found in this entry's text
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v2.1.275
Artifact 'copy' access checks now special-case type-locked artifacts
Copying a type-locked artifact now goes through a dedicated access check instead of the generic one
found in this entry's text
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v2.1.273
Read tool's HTTP handler helper gains body_file support
Read tool's HTTP handler settings now accept a body_file option alongside method, body, mode, and script
found in this entry's text
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v2.1.268
Sandbox schema additions: MITM proxy domain routing and env-var credential masking with JWT decode
Sandbox config gains schemas for routing traffic through a MITM proxy and masking credentials in environment variables, including JWT handling
found in this entry's text
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v2.1.229
Plugins can be installed from a command that prints a directory
Marketplaces can install a plugin by running a command that prints a directory path, with your consent.
named in this entry, found in this entry's text
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v2.1.228
SDK system messages report background tasks and turn context
Programs driving Claude Code through the SDK now see more detail about background work and turn context.
found in this entry's text
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v2.1.212
Subagent Mode Parameter Deprecated
found in this entry's text
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v2.1.198
Memory Stores Env Var
found in this entry's text
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v2.1.186
Security Classifier Scope Refined
found in this entry's text
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v2.1.120
hideVimModeIndicatorStatus Line Settingfound in this entry's text
- v2.1.114
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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
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v0.2.77
Enhanced File Context Handling
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
2Build by build
150One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
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.