ADR 020 skeleton

docs/architecture/README.md

@@ -45,3 +45,4 @@ Please add a entry below in your Pull Request for an ADR.
 - [ADR 017: Historical Header Module](./adr-017-historical-header-module.md)
 - [ADR 018: Extendable Voting Periods](./adr-018-extendable-voting-period.md)
 - [ADR 019: Protocol Buffer State Encoding](./adr-019-protobuf-state-encoding.md)
+- [ADR 020: Protocol Buffer Client Encoding](./adr-020-protobuf-client-encoding.md)

docs/architecture/adr-019-protobuf-state-encoding.md

@@ -309,8 +309,6 @@ at the application-level.
 
 ### Neutral
 
-{neutral consequences}
-
 ## References
 
 1. https://github.com/cosmos/cosmos-sdk/issues/4977

docs/architecture/adr-020-protobuf-client-encoding.md

@@ -0,0 +1,23 @@
+# ADR 020: Protocol Buffer Client Encoding
+
+## Changelog
+
+- 2020 March 06: Initial Draft
+
+## Status
+
+Proposed
+
+## Context
+
+## Decision
+
+## Consequences
+
+### Positive
+
+### Negative
+
+### Neutral
+
+## References