doc: update ADR

Author: notJoon

gno.land/adr/pr153_zkgm_only_maker_recv_revert.md

@@ -0,0 +1,31 @@
+# ZKGM Receive Handling Update
+
+## Context
+
+Some receive paths did not handle retry-required outcomes consistently, which could cause packet processing results to be recorded differently than intended in certain situations.
+
+In addition, malformed response data could affect downstream acknowledgement processing.
+
+## Decision
+
+The receive handling logic was aligned so that retry-required outcomes abort processing and remain eligible for retry.
+
+Acknowledgement handling was also updated to treat malformed responses as failures, ensuring downstream processing behaves consistently.
+
+Existing error propagation behavior for internal handlers remains unchanged.
+
+## Alternatives Considered
+
+Modifying only lower-level execution helpers was rejected because it would reduce consistency across the overall processing flow.
+
+Limiting the change to a subset of receive paths was also rejected because it would not fully address the issue.
+
+Ignoring all acknowledgement errors was rejected because some errors indicate invariant violations that should continue to surface.
+
+## Consequences
+
+Retry-required outcomes no longer result in finalized processing and can be retried safely.
+
+Malformed responses are handled consistently, improving the robustness of acknowledgement processing.
+
+The behavior of lower-level execution helpers remains unchanged, preserving compatibility with existing logic and tests.