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.
MCP server entries declared in plugin configs that refer to CLI-owned builtin servers are now silently ignored with a debug log, rather than causing a conflict or error.
Evidence
Log message (search for "Builtin server is CLI-owned; ignored")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.