Shared subchannel sketch
diff --git a/build.yaml b/build.yaml
index aa30bae..ae3fb85 100644
--- a/build.yaml
+++ b/build.yaml
@@ -132,6 +132,7 @@
   - src/core/client_config/resolvers/sockaddr_resolver.h
   - src/core/client_config/subchannel.h
   - src/core/client_config/subchannel_factory.h
+  - src/core/client_config/subchannel_index.h
   - src/core/client_config/uri_parser.h
   - src/core/compression/algorithm_metadata.h
   - src/core/compression/message_compress.h
@@ -247,6 +248,7 @@
   - src/core/client_config/resolvers/sockaddr_resolver.c
   - src/core/client_config/subchannel.c
   - src/core/client_config/subchannel_factory.c
+  - src/core/client_config/subchannel_index.c
   - src/core/client_config/uri_parser.c
   - src/core/compression/algorithm.c
   - src/core/compression/message_compress.c