notifications
A Claude Code settings key, read out of the shipped bundle. It was in the build from v2.1.315 and was gone by v2.1.317.
MCP request handling was updated to a newer library shape, including prompts and task status updates.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.221.
In the changelogs
8Releases whose published page names notifications.
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v2.1.295
claude.ai connectors now use automatic MCP protocol negotiation by default
MCP servers reached through claude.ai connectors now agree a protocol version automatically unless the server explicitly turns this off
found in this entry's text
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v2.1.290
Channel messages can now be ignored when a check fails
Incoming channel notifications are now dropped unless a check passes, where before they were always queued
found in this entry's text
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v2.1.271
MCP server progress heartbeat while a tool call runs
MCP tool calls now send periodic 'still running' progress updates while they execute
found in this entry's text
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v2.1.221
MCP request handlers moved to string method names and the new request object
MCP request handling was updated to a newer library shape, including prompts and task status updates.
found in this entry's text
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v2.1.221
MCP elicitation schemas are validated with a clear error
A bad MCP elicitation schema now shows a clear error instead of a misleading reconnect message.
found in this entry's text
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v2.1.81
MCP Channel Permissions [Gradual Rollout]
found in this entry's text
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v2.1.80
Channels (MCP Inbound Push Notifications)
found in this entry's text
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v1.0.21
New Features
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
7One 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.