Retire wording tied to pre-2.0 milestones (#3211)

src/mcp/server/lowlevel/server.py

@@ -433,9 +433,9 @@ class Server(Generic[LifespanResultT]):
         # `OpenTelemetryMiddleware` ships on by default so every server emits a
         # SERVER span per message; it is a no-op until an OTel exporter is
         # installed. Drop it from this list to opt out.
-        # TODO(L54): provisional - signature and semantics change with the
-        # Context/middleware rework (covariant `Context[L]`, outbound seam) before
-        # v2 final.
+        # TODO(L54): provisional - signature and semantics may change in a 2.x
+        # minor release with the Context/middleware rework (covariant
+        # `Context[L]`, outbound seam).
         self.middleware: list[ServerMiddleware[LifespanResultT]] = [OpenTelemetryMiddleware()]
         # SEP-2133 extension settings advertised under `ServerCapabilities.extensions`
         # (identifier -> settings). Higher layers (e.g. `MCPServer(extensions=...)`)

src/mcp/server/mcpserver/server.py

@@ -267,8 +267,8 @@ class MCPServer(Generic[LifespanResultT]):
 
         The same list as the low-level `Server.middleware`: append an
         `async (ctx, call_next)` callable to observe, refuse, or rewrite
-        messages before they reach a handler. Provisional - the signature is
-        expected to change before v2 is final; see the middleware guide.
+        messages before they reach a handler. Provisional - the signature may
+        change in a 2.x minor release; see the middleware guide.
         """
         return self._lowlevel_server.middleware
 

src/mcp/shared/dispatcher.py

@@ -250,7 +250,8 @@ class Dispatcher(Outbound, Protocol[TransportT_co]):
     Implementations own correlation of outbound requests to inbound results, the
     receive loop, per-request concurrency, and cancellation/progress wiring.
 
-    The lifecycle surface is provisional; `run()` may change before v2 stable.
+    The lifecycle surface is provisional; `run()` may change in a 2.x minor
+    release.
     """
 
     async def run(