Follow Discord
Sweep 12 Nov 2026 · 23:00Z Build v2.1.323 540 read Stable v2.1.311 Latest v2.1.323 Next v2.1.323 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeReleasesv2.1.323entry #28

Claude Code v2.1.323 ·

Plugins can now react to MCP connections and change the tool list

Plugins gain mcp.connect and tool.list hooks, so they can step in on MCP connections and add or remove tools in a session

Use it now Notable New Features
JSON All of v2.1.323
Use it nowTier: how much it should matter to you
5Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Plugin HooksArea: what it touches
New FeaturesKind: in v2.1.323,
What probably matters to youSection of the release
What

Plugins can now use two hooks, points where a plugin's code is run:

  • mcp.connect, when Claude Code connects to an MCP server (an add-on that supplies tools)
  • tool.list, when the list of tools Claude can use is built

For each session, Claude Code keeps track of what plugins answered, which tools they added or removed, and which hooks failed. If Claude tries to use a tool a plugin removed, the call is refused with a message saying a plugin removed it from this session.

Why

Plugins can shape which tools Claude sees and step in when MCP servers connect.

Read from
Names in the bundletool.list
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeChanged tool.list plugin hooks so the tools they add or remove apply to the model and every agent

See this entry in the whole of v2.1.323 →

Feedback