Publish stable client proto inputs

docs/client-libraries-design.md

@@ -26,6 +26,11 @@ Language-specific plans:
 - `docs/clients-python-design.md`
 - `docs/clients-java-design.md`
 
+Shared generation inputs:
+
+- `docs/client-proto-generation.md`
+- `clients/proto/proto-inputs.json`
+
 Language style guides:
 
 | Client | Style guide |
@@ -365,6 +370,16 @@ examples/
 Generated code should be reproducible from `src/MxGateway.Contracts/Protos/`.
 Do not hand-edit generated code.
 
+The stable client proto manifest defines the generated-code directories:
+
+```text
+clients/dotnet/generated
+clients/go/internal/generated
+clients/rust/src/generated
+clients/python/src/mxgateway/generated
+clients/java/src/main/generated
+```
+
 ## Versioning
 
 All clients should expose: