typescript-sdk/.changeset/schemas-source-home.md

@modelcontextprotocol/core	@modelcontextprotocol/client	@modelcontextprotocol/server	@modelcontextprotocol/server-legacy
minor	minor	minor	minor

Move the schema source modules (spec schemas, OAuth schemas, protocol constants) into @modelcontextprotocol/core and resolve them from there as a regular runtime dependency instead of bundling a private copy into each package. An application importing more than one of the packages now evaluates a single shared schema graph with shared object identity. @modelcontextprotocol/core gains a ./internal subpath (SDK-internal contract; may change in any release) and the four packages now version together.