Opt the streaming story client into log delivery

The streaming story's client asserts that three log messages arrive
during the countdown, but never opted in, so on 2026-07-28 arms it
depended on the server hand-sending the notification around the
per-request log gate. Pass log_level="info" so the story models the
spec-correct opt-in, and rewrite the server comment that promised a
non-deprecated logging helper - protocol logging is deprecated
(SEP-2577), so the raw send is what keeps the example warning-free.

Author: maxisbey

examples/stories/streaming/client.py

@@ -15,7 +15,9 @@ async def main(target: Target, *, mode: str = "auto") -> None:
     async def on_log(params: LoggingMessageNotificationParams) -> None:
         logs.append(params)
 
-    async with Client(target, mode=mode, logging_callback=on_log) as client:
+    # `log_level` is the 2026-07-28 per-request opt-in: without it a modern server
+    # sends no log notifications at all (pre-2026 servers ignore it and send anyway).
+    async with Client(target, mode=mode, logging_callback=on_log, log_level="info") as client:
         # ── progress + logging: a short countdown delivers exactly `steps` of each, in order ──
         updates: list[tuple[float, float | None, str | None]] = []
 

examples/stories/streaming/server.py

@@ -16,9 +16,10 @@ async def countdown(steps: int, ctx: Context) -> dict[str, int]:
         try:
             for i in range(1, steps + 1):
                 await ctx.report_progress(float(i), float(steps), f"step {i}/{steps}")
-                # No non-deprecated logging helper on Context yet, so send the raw
-                # notification. `related_request_id` keeps it on this request's response
-                # stream (matters over streamable HTTP).
+                # Protocol logging is deprecated (SEP-2577), so the raw notification
+                # keeps this warning-free. On 2026-07-28+ the client only receives it
+                # because it opts in with `log_level=`; `related_request_id` keeps it on
+                # this request's response stream (matters over streamable HTTP).
                 await ctx.request_context.session.send_notification(
                     types.LoggingMessageNotification(
                         params=types.LoggingMessageNotificationParams(