.NET: [Feature]: Make the RequestMessages property of ChatMessageStore.InvokedContext writable

[marcominerva]

Description

With the new WithMessageFilters method, it is now possible to easily filter messages before they are passed to a Message Store.

However, I noticed that the RequestMessages property in the ChatMessageStore.InvokedContext class is read-only. Because of this, if the collection needs to be modified, a completely new InvokedContext instance must be created.

For example:

.WithMessageFilters(invokedMessagesFilter: context =>
{
    var newContext = new ChatMessageStore.InvokedContext(context.RequestMessages
        .Where(x => !(x.AdditionalProperties?.TryGetValue("IsPrivate", out bool value) is true && value is true)),
        context.ChatMessageStoreMessages)
    {
        ResponseMessages = context.ResponseMessages,
        AIContextProviderMessages = context.AIContextProviderMessages,
        InvokeException = context.InvokeException
    };

    return newContext;
});

Would it be possible to make the RequestMessages property writable, or alternatively provide a supported way to modify the request messages without recreating the entire InvokedContext?

Language/SDK

.NET

[markwallace-microsoft]

@westey-m I have added the v1.0 label to this one as it impacts public API surface.

[westey-m]

@marcominerva, thanks, makes sense. Update is in and will be in the next release.