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.
The maximum MCP tool output size is now configurable via both the MAX_MCP_OUTPUT_TOKENS environment variable and the tengu_satin_quoll feature flag, instead of being hardcoded at 25,000 tokens.
Evidence
Configurable limits (search for "MAX_MCP_OUTPUT_TOKENS") — function PV8 at line ~319854
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.