Where is the `agent_pb.ts`/`agent.proto` from?

Hii,
I did fork the repo and was wondering where i can get the `agent.proto` file from that was the based for the `agent_pb.ts` generation from?

Its important to me to be able to have the option to build it myself in case of changes.
I worked out something like this, but the base agent.proto is missing:
```
protoc -I proto \
--plugin=protoc-gen-es=./node_modules/.bin/protoc-gen-es \
--es_out=src/proto \
--es_opt=target=ts \
agent.proto
```

Thanks in advance

Start by locating src/proto/agent_pb.ts and reviewing the repository's existing generation setup. Determine where agent.proto comes from and document or provide the source needed to reproduce the shown protoc command; done means the origin and regeneration steps are available to someone who forks the repository.

Written by the indexing model from the issue text.