Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.221 Home All releases olderv2.1.220 v2.1.222newer

/mcp status surfaces cached servers

You'll notice
Useful3 Signal0
MCP

The /mcp view now counts cached servers separately so you can tell them from live connections.

Feature flag
tengu_mcp_discovery_cache Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.221: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.221. It isn't a statement about your account. What a flag value here can and cannot tell you

/mcp
What

Cached MCP servers are now counted and reported as their own state in the inline /mcp summary, the MCP dialog, and the SDK wait-for-servers result.

Details
  • The inline /mcp summary line counts cached servers separately, assembling a string containing the fixed fragment ${A} cached, .
  • The dialog status mapper returns "cached" for cached entries.
  • The control/SDK "wait for MCP servers" result schema gained an optional cached: w.array(w.string()).optional() list alongside connected, failed, stillPending, needsAuth and disabled.
  • Only meaningful on the MCP discovery cache path (tengu_mcp_discovery_cache); without cached entries the counts read as before.
Evidence

if (Yt.type === "cached") return "cached";

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.221 →