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Expose the middleware chain on MCPServer and stop sending unrequested change notifications (#3201)

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Max 2026-07-28 12:24:23 +01:00 • committed by GitHub
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docs/client/subscriptions.md
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@ -20,7 +20,7 @@ Duplicate events waiting to be consumed collapse into one, and refetching still
Two more properties of the handle:
* `sub.honored` is the filter the server acknowledged: a `SubscriptionFilter` with the fields you passed, read as attributes (`sub.honored.prompts_list_changed`). `MCPServer` honors every kind you ask for, so it echoes your request back. A server that narrows the filter (see the [filter warning](../handlers/subscriptions.md#only-what-was-asked-for) on the server page) acknowledges less, and an honored kind may still never fire.
* `sub.honored` is the filter the server acknowledged: a `SubscriptionFilter` with the fields you passed, read as attributes (`sub.honored.prompts_list_changed`). `MCPServer` honors every kind you ask for, so it echoes your request back. A server that supports fewer kinds acknowledges less, and an honored kind may still never fire. A server may also refuse the whole request rather than acknowledge it (see [Deciding who may watch](../handlers/subscriptions.md#deciding-who-may-watch) on the server page), which surfaces as the request's error.
* `sub.subscription_id` is the listen request's id, the one stamped on every frame of this stream. Several subscriptions can be open at once, each demultiplexed by its own id.
## Watching without blocking