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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.

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Claude Code v2.1.248 27 Aug 2026

Switching accounts clears one more MCP cache

You'll notice

Useful3 Signal2

MCP

Switching accounts clears more MCP state, so you see fewer stale tools.

What

When your identity changes, Claude Code now clears an additional cache before recomputing MCP clients, tools, commands and resources, on top of evicting the existing memoised results. This reduces the chance of stale MCP state after an account switch.

Evidence

evictAllMcpMemosOnIdentityChange

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

See this entry in the whole of v2.1.248 →