diff --git a/contracts/sysio.msgch/include/sysio.msgch/sysio.msgch.hpp b/contracts/sysio.msgch/include/sysio.msgch/sysio.msgch.hpp
index 23f5e83af6..2d35fcc97e 100644
--- a/contracts/sysio.msgch/include/sysio.msgch/sysio.msgch.hpp
+++ b/contracts/sysio.msgch/include/sysio.msgch/sysio.msgch.hpp
@@ -189,9 +189,6 @@ namespace sysio {
          uint64_t    chain_code;
          uint32_t    epoch_index;
          checksum256 envelope_hash;
-         checksum256 merkle_root;
-         checksum256 start_message_id;
-         checksum256 end_message_id;
          opp::types::EnvelopeStatus status;
          std::vector<char> raw_envelope;
 
@@ -201,8 +198,7 @@ namespace sysio {
          }
 
          SYSLIB_SERIALIZE(outbound_envelope,
-            (id)(chain_code)(epoch_index)(envelope_hash)(merkle_root)
-            (start_message_id)(end_message_id)(status)(raw_envelope))
+            (id)(chain_code)(epoch_index)(envelope_hash)(status)(raw_envelope))
       };
 
       using outenvelopes_t = sysio::kv::table<"outenvelopes"_n, id_key, outbound_envelope,
diff --git a/contracts/sysio.msgch/sysio.msgch.abi b/contracts/sysio.msgch/sysio.msgch.abi
index ce04b1d347..5586d7cf30 100644
--- a/contracts/sysio.msgch/sysio.msgch.abi
+++ b/contracts/sysio.msgch/sysio.msgch.abi
@@ -294,18 +294,6 @@
                     "name": "envelope_hash",
                     "type": "checksum256"
                 },
-                {
-                    "name": "merkle_root",
-                    "type": "checksum256"
-                },
-                {
-                    "name": "start_message_id",
-                    "type": "checksum256"
-                },
-                {
-                    "name": "end_message_id",
-                    "type": "checksum256"
-                },
                 {
                     "name": "status",
                     "type": "EnvelopeStatus"
diff --git a/contracts/sysio.opp.common/include/sysio.opp.common/opp_table_types.hpp b/contracts/sysio.opp.common/include/sysio.opp.common/opp_table_types.hpp
index f20e7a23e3..2eeb1431d3 100644
--- a/contracts/sysio.opp.common/include/sysio.opp.common/opp_table_types.hpp
+++ b/contracts/sysio.opp.common/include/sysio.opp.common/opp_table_types.hpp
@@ -266,18 +266,19 @@ DataStream& operator>>(DataStream& ds, Message& t) {
    return ds >> t.header >> t.payload;
 }
 
-// Envelope: trimmed v6 — merkle/start_message_id/end_message_id removed
+// Envelope: inline-consensus fields. Legacy merkle/range metadata was removed
+// from the schema and is not stored in CDT table serialization.
 template <typename DataStream>
 DataStream& operator<<(DataStream& ds, const Envelope& t) {
    return ds << t.envelope_hash << t.endpoints << t.epoch_timestamp
              << t.epoch_index << t.epoch_envelope_index
-             << t.previous_envelope_hash;
+             << t.previous_envelope_hash << t.messages;
 }
 template <typename DataStream>
 DataStream& operator>>(DataStream& ds, Envelope& t) {
    return ds >> t.envelope_hash >> t.endpoints >> t.epoch_timestamp
              >> t.epoch_index >> t.epoch_envelope_index
-             >> t.previous_envelope_hash;
+             >> t.previous_envelope_hash >> t.messages;
 }
 
 } // namespace sysio::opp
diff --git a/libraries/opp/proto/sysio/opp/opp.proto b/libraries/opp/proto/sysio/opp/opp.proto
index 77803b78a7..6882ee5b27 100644
--- a/libraries/opp/proto/sysio/opp/opp.proto
+++ b/libraries/opp/proto/sysio/opp/opp.proto
@@ -62,7 +62,8 @@ message Message {
 //  Epoch envelope
 // ---------------------------------------------------------------------------
 
-// Envelope that spans a range of messages within an epoch.
+// Envelope for an epoch. `messages` are carried inline and are consensus-covered
+// by the accepted serialized envelope digest.
 message Envelope {
    bytes          envelope_hash          = 1; // 32 bytes
    Endpoints      endpoints              = 2;