Support A2A protocol v0.2.5

[scbizu]

Since A2A spec has its own protobuf definition, why not use the generated pb definition. And from that you can write some shell script or GitHub Action to sync upstream versions rather than manually write the struct if upstream has no breakchanges 🤔

[hyprh]

Thanks for your feedback! Leveraging the spec's proto files to auto-generate Protobuf definitions is indeed a great idea. Initially, since the A2A spec lacked proto definitions, we implemented custom code. We'll try to using pb definitions and add gRPC support. Anyone wanna contribute some code?

[scbizu]

If you guys need some help , I maybe can work on it this weekend .

[hyprh]

That's incredibly appreciated! If you have time this weekend, we'd greatly welcome your help in replacing the custom types in types.go with those generated from the pb files.

[sandyskies]

@scbizu are u working on it？

[scbizu]

@sandyskies Yes , but it seems a little huge , should i raise the WIP PR first ?

You can take a look at scbizu@03438e8

[hyprh]

@sandyskies Yes , but it seems a little huge , should i raise the WIP PR first ?

You can take a look at scbizu@03438e8

I think you can propose this PR first, and then we'll assist you in completing it together :)

[unitsvc]

@hyprh Is this issue still in progress?

[hyprh]

@unitsvc We are currently supporting protocols related to gRPC and Protobuf. However, considering there are certain differences between the protobuf protocol and the HTTP protocol, directly replacing the original types with those generated by Protobuf would result in numerous breaking changes. Therefore, we are making modifications based on the existing code.