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Sweep 01 Oct 2026 · 17:27Z Build v2.1.287 508 read Stable v2.1.285 Latest v2.1.287 Next v2.1.287 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.286 ·

Waiting for MCP servers added mid-session is timed differently

Claude Code now times its wait for MCP servers added during a session to the moment they answer, and gains a relay hold option

You'll notice Improvements
JSON All of v2.1.286
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.286,
ImprovementsSection of the release
What

MCP servers are outside programs that give Claude Code extra tools. When servers are added during a session, Claude Code can hold briefly while they come up. Several parts of that have changed:

  • The hold is now measured up to the moment the servers answered, instead of up to the current time.
  • The time the most recent added servers answered is now recorded.
  • The settings for this hold gain a relayHold field.
  • Waiting for the added servers now follows one of two paths depending on a condition.
Why

This affects how Claude Code waits for, and times, MCP servers that join partway through a session.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat sets `relayHold` and what decides which of the two waiting paths is used are not known.

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