diff --git a/changelog.d/sui-67d.md b/changelog.d/sui-67d.md
new file mode 100644
index 0000000..ce3567b
--- /dev/null
+++ b/changelog.d/sui-67d.md
@@ -0,0 +1,8 @@
+### Added
+
+- Every `effect.*` wire message now carries the engine's `round` stamp in
+  its envelope, alongside `macrostep` and `microstep` -
+  `effect.budget_exhausted` already carried it, and the other nine types
+  gain it. An additive field under the wire format's must-ignore rule, so
+  the format version stays 1; consumers reading older recorded streams
+  must still tolerate `effect.*` messages without the key.
diff --git a/docs/wire-format.md b/docs/wire-format.md
index c64f6ca..57653e7 100644
--- a/docs/wire-format.md
+++ b/docs/wire-format.md
@@ -43,9 +43,9 @@ Every message is a JSON object. Every message carries:
 | type | string | always |
 | session | string | always |
 | seq | integer | always |
-| macrostep | integer | `trace.*` only |
-| microstep | integer | `trace.*` only |
-| round | integer | `trace.*` only |
+| macrostep | integer | `trace.*` and `effect.*` |
+| microstep | integer | `trace.*` and `effect.*` |
+| round | integer | `trace.*` and `effect.*` |
 
 `type` is a dotted-namespace string identifying the message shape; the
 remaining sections of this document define every value it may take.
@@ -54,19 +54,22 @@ consumer can share one channel across a session and, later, an invoke tree
 of related sessions. `seq` is a per-session monotonic integer, described
 fully under "Ordering" below.
 
-**`effect.*` messages carry `macrostep` and `microstep` but not `round`,
-even though the engine now stamps `round` on every core effect.** As of
-ADR-0046 (`st-xb2b`), every core (non-trace) statifier effect payload
-carries `macrostep`, `microstep`, and `round` - effects emitted before that
-fold carry `round: 0`. This producer does not yet propagate the engine's
-`round` onto `effect.*` messages; that propagation is tracked as
-`sui-t36.5`. This is not an oversight this document papers over: the gap is
-in this producer, not upstream, and inventing a value on the wire ahead of
-the propagation work would be a guess baked into the format. When this
-producer's `effect.*` payloads gain `round`, this document's `effect.*`
-schemas gain the key. That is an additive change under the versioning rule
-above, not a version bump. The envelope table above reflects what this
-producer emits today: `round` on `trace.*` only.
+**`effect.*` messages carry all three counters, `round` included**
+(`sui-67d`). The value is the engine's own stamp, carried verbatim: as of
+statifier ADR-0046 (`st-xb2b`), every core (non-trace) statifier effect
+payload carries `macrostep`, `microstep`, and `round` - effects emitted
+before that fold carry `round: 0` - and this producer propagates the
+stamp rather than inventing one. Between ADR-0046 landing upstream and
+`sui-67d` landing here, this producer emitted `round` on `trace.*`
+messages and `effect.budget_exhausted` only; the other `effect.*` types
+gained the key later. **Versioning decision, recorded rather than left
+implicit:** adding `round` to the remaining `effect.*` envelopes is an
+additive field change, exactly what the conformance section's MUST-ignore
+rule makes safe, so **the format version stays 1** - the same reasoning
+`effect.datamodel_change` records below for adding a whole type. A
+consumer reading an older recorded stream must still tolerate `effect.*`
+messages without `round` (the must-ignore rule's mirror image: absence of
+a field a newer producer would have written is not an error).
 
 Beyond the fields in the table, every message carries a **payload**: the
 type-specific fields, documented below one type at a time. A payload key
@@ -516,13 +519,12 @@ ADR-0005 leaves non-trace effect naming to this document
 because a bare top-level `done` type would sit confusingly next to
 `trace.done` - a different message about the same moment in the run.
 `effect.*` and `trace.*` are two visibly distinct halves of the vocabulary:
-`trace.*` are the nine Appendix D phase boundaries, stamped with all three
-counters; `effect.*` are the core effect vocabulary, stamped with
-`macrostep`/`microstep` only (see "The envelope" above for why `round` is
-absent).
+`trace.*` are the nine Appendix D phase boundaries and `effect.*` are the
+core effect vocabulary, both stamped with all three counters (see "The
+envelope" above; `round` joined the `effect.*` envelopes in `sui-67d`,
+after `effect.budget_exhausted` had carried it from the start).
 
-Every `effect.*` message carries `macrostep` and `microstep`, never
-`round`.
+Every `effect.*` message carries `macrostep`, `microstep`, and `round`.
 
 ### `effect.log`
 
@@ -547,8 +549,9 @@ The terminal effect, emitted once after top-level final entry.
 ### `effect.budget_exhausted`
 
 Emitted when a macrostep's fold spends its round budget without reaching
-quiescence (ADR-0019). This is the one core effect that does carry `round`
-- see "The envelope" above.
+quiescence (ADR-0019). This was the one core effect that carried `round`
+before `sui-67d` propagated the key onto the rest of the `effect.*`
+family - see "The envelope" above.
 
 | Field | Type | Presence |
 |---|---|---|
@@ -912,9 +915,11 @@ that test rather than drifting silently.
 - ADR-0003 (`docs/adr/0003-fixtures-as-the-example-data-contract.md`) - the
   fixtures sidecar object `session.start`'s `fixtures` field carries
   verbatim.
-- `st-nbmj` - the upstream gap behind `effect.*` messages carrying no
-  `round`, closed by ADR-0046; this producer's own propagation of `round`
-  onto `effect.*` messages is tracked separately as `sui-t36.5`.
+- `st-nbmj` - the upstream gap behind `effect.*` messages once carrying no
+  `round`, superseded by `st-xb2b`, whose ADR-0046 settled it (the two ids
+  name one thread of work: `st-nbmj` filed the gap, `st-xb2b` decided it);
+  this producer's own propagation of `round` onto `effect.*` messages was
+  `sui-67d`, above.
 - `st-r6l9` - the upstream reordering seam behind the old ordering warning
   above, closed by ADR-0044.
 - `st-1xwh` - the upstream effect (`Statifier.Effect.DatamodelInit`) behind
diff --git a/lib/statifier_ui/datamodel_explorer.ex b/lib/statifier_ui/datamodel_explorer.ex
index a1468f8..36fd240 100644
--- a/lib/statifier_ui/datamodel_explorer.ex
+++ b/lib/statifier_ui/datamodel_explorer.ex
@@ -146,10 +146,12 @@ defmodule StatifierUI.DatamodelExplorer do
      least one write stamped at that macrostep carried a decoded
      `prior_value` different from its decoded `new_value` - so a first
      binding, which has no `prior_value` at all, counts as a change from
-     `:undefined`. This is macrostep granularity, not round: every
-     `effect.*` type but `effect.budget_exhausted` carries a `nil` `round`
-     (`normalizer.ex:271`), so finer marking would need an upstream wire
-     change.
+     `:undefined`. This is macrostep granularity, not round - chosen when
+     `effect.datamodel_change` still carried a `nil` `round` envelope.
+     sui-67d has since stamped `round` on every `effect.*` message, so
+     round-granular marking is now a possible refinement here rather than
+     an upstream wire change; this pane deliberately stays at macrostep
+     granularity, and never reads the `round` field at all.
   7. `shape` and `label` are computed once, from each entry's final decoded
      value, so an entry written more than once in one macrostep is
      labelled from its end state.
diff --git a/lib/statifier_ui/event_log.ex b/lib/statifier_ui/event_log.ex
index ffe0756..885bf94 100644
--- a/lib/statifier_ui/event_log.ex
+++ b/lib/statifier_ui/event_log.ex
@@ -23,15 +23,15 @@ defmodule StatifierUI.EventLog do
 
   ## Routing `effect.*` messages
 
-  Every `trace.*` message carries a `round`; eight of the nine `effect.*`
-  types do not and are routed to their macrostep's `effects` instead. The
-  ninth, `effect.budget_exhausted`, is "the one core effect that does carry
-  `round`" (`docs/wire-format.md:546-547`), so it is routed to its round
-  bucket instead of `effects`. The routing rule is therefore "does this
-  message carry a `round`", never a check against the `"effect."` prefix -
-  which is also what makes a future propagation of `round` onto the
-  remaining `effect.*` types (tracked separately, not part of this plan) a
-  pure data change that needs no change here.
+  The routing rule is "does this message carry a `round`", never a check
+  against the `"effect."` prefix. When this module was written only
+  `trace.*` messages and `effect.budget_exhausted` carried `round`, so the
+  other `effect.*` types landed in their macrostep's `effects`; sui-67d
+  then propagated `round` onto every `effect.*` type, and - exactly as
+  planned - that was a pure data change needing no change here: an
+  `effect.*` message carrying a `round` is routed to its round bucket, and
+  `effects` still catches any message without one (an older recorded
+  stream, for example - the must-ignore rule cuts both ways).
 
   ## Errors
 
diff --git a/lib/statifier_ui/trace/message.ex b/lib/statifier_ui/trace/message.ex
index 094372b..435c0b0 100644
--- a/lib/statifier_ui/trace/message.ex
+++ b/lib/statifier_ui/trace/message.ex
@@ -3,8 +3,9 @@ defmodule StatifierUI.Trace.Message do
   One message of the trace wire format (`docs/wire-format.md`), held as a
   struct in process and rendered to the documented JSON object by `to_map/1`.
 
-  The envelope fields (`type`, `session`, `seq`, and the `trace.*`-only
-  `macrostep`/`microstep`/`round`) live on the struct directly; everything
+  The envelope fields (`type`, `session`, `seq`, and the counters
+  `macrostep`/`microstep`/`round`, carried by `trace.*` and `effect.*`
+  messages and by no `session.*` message) live on the struct directly; everything
   type-specific lives in `payload`, already in wire shape - a string-keyed
   map ready to merge over the envelope. This is decision 1 of the plan: one
   envelope struct rather than one struct per message type, so the spec stays
@@ -73,7 +74,8 @@ defmodule StatifierUI.Trace.Message do
 
   `"type"`, `"session"`, and `"seq"` are always present; `"macrostep"`,
   `"microstep"`, and `"round"` are present only when non-`nil` (decisions 3
-  and 5 - `effect.*` messages carry no `round`, `session.*` messages carry
+  and 5, amended by sui-67d - `trace.*` and `effect.*` messages carry all
+  three, `session.*` messages carry
   none of the three). Specced for a valid message: call `validate/1` first,
   or construct through `StatifierUI.Trace.Normalizer`, which always does.
   """
diff --git a/lib/statifier_ui/trace/normalizer.ex b/lib/statifier_ui/trace/normalizer.ex
index 3376cd7..d1d96f8 100644
--- a/lib/statifier_ui/trace/normalizer.ex
+++ b/lib/statifier_ui/trace/normalizer.ex
@@ -268,7 +268,7 @@ defmodule StatifierUI.Trace.Normalizer do
     with {:ok, base} <- put_owner(base, p.owner),
          {:ok, base} <- put_defined(base, "new_value", p.new_value),
          {:ok, base} <- put_defined(base, "prior_value", p.prior_value) do
-      {:ok, {"effect.datamodel_change", p.macrostep, p.microstep, nil, base}}
+      {:ok, {"effect.datamodel_change", p.macrostep, p.microstep, p.round, base}}
     end
   end
 
@@ -278,7 +278,7 @@ defmodule StatifierUI.Trace.Normalizer do
     with {:ok, base} <- put_owner(base, p.owner),
          {:ok, base} <- put_value(base, "value", p.value) do
       base = put_present(base, "c_index", p.c_index)
-      {:ok, {"effect.log", p.macrostep, p.microstep, nil, base}}
+      {:ok, {"effect.log", p.macrostep, p.microstep, p.round, base}}
     end
   end
 
@@ -286,7 +286,7 @@ defmodule StatifierUI.Trace.Normalizer do
     base = %{"configuration" => configuration(p.configuration)}
 
     with {:ok, payload} <- put_value(base, "donedata", p.donedata) do
-      {:ok, {"effect.done", p.macrostep, p.microstep, nil, payload}}
+      {:ok, {"effect.done", p.macrostep, p.microstep, p.round, payload}}
     end
   end
 
@@ -315,13 +315,13 @@ defmodule StatifierUI.Trace.Normalizer do
 
     with {:ok, base} <- put_value(base, "params", p.params),
          {:ok, base} <- put_value(base, "content", p.content) do
-      {:ok, {"effect.invoke", p.macrostep, p.microstep, nil, base}}
+      {:ok, {"effect.invoke", p.macrostep, p.microstep, p.round, base}}
     end
   end
 
   defp core_message(%CancelInvoke{} = p) do
     payload = %{"invoke_id" => p.invoke_id, "state_index" => p.state_index}
-    {:ok, {"effect.cancel_invoke", p.macrostep, p.microstep, nil, payload}}
+    {:ok, {"effect.cancel_invoke", p.macrostep, p.microstep, p.round, payload}}
   end
 
   defp core_message(%Autoforward{} = p) do
@@ -332,7 +332,7 @@ defmodule StatifierUI.Trace.Normalizer do
         "event" => event_obj
       }
 
-      {:ok, {"effect.autoforward", p.macrostep, p.microstep, nil, payload}}
+      {:ok, {"effect.autoforward", p.macrostep, p.microstep, p.round, payload}}
     end
   end
 
@@ -345,7 +345,7 @@ defmodule StatifierUI.Trace.Normalizer do
     with {:ok, base} <- put_owner(base, p.owner),
          {:ok, base} <- put_value(base, "data", p.data) do
       base = put_present(base, "c_index", p.c_index)
-      {:ok, {"effect.send", p.macrostep, p.microstep, nil, base}}
+      {:ok, {"effect.send", p.macrostep, p.microstep, p.round, base}}
     end
   end
 
@@ -363,7 +363,7 @@ defmodule StatifierUI.Trace.Normalizer do
     with {:ok, base} <- put_owner(base, p.owner),
          {:ok, base} <- put_value(base, "data", p.data) do
       base = put_present(base, "c_index", p.c_index)
-      {:ok, {"effect.send_delayed", p.macrostep, p.microstep, nil, base}}
+      {:ok, {"effect.send_delayed", p.macrostep, p.microstep, p.round, base}}
     end
   end
 
@@ -371,7 +371,7 @@ defmodule StatifierUI.Trace.Normalizer do
     base = put_present(%{"send_id" => p.send_id}, "c_index", p.c_index)
 
     with {:ok, base} <- put_owner(base, p.owner) do
-      {:ok, {"effect.cancel", p.macrostep, p.microstep, nil, base}}
+      {:ok, {"effect.cancel", p.macrostep, p.microstep, p.round, base}}
     end
   end
 
diff --git a/test/statifier_ui/event_log_test.exs b/test/statifier_ui/event_log_test.exs
index 3c713da..57bc878 100644
--- a/test/statifier_ui/event_log_test.exs
+++ b/test/statifier_ui/event_log_test.exs
@@ -475,6 +475,31 @@ defmodule StatifierUI.EventLogTest do
       assert macrostep.rounds == []
     end
 
+    # Since sui-67d the live producer stamps `round` on every `effect.*`
+    # message, so this is the live-stream shape; the round-less case above
+    # remains what an older recorded stream looks like.
+    test "a round-carrying effect lands in its round, not in Macrostep.effects" do
+      messages = [
+        %Message{
+          type: "effect.log",
+          session: "s",
+          seq: 0,
+          macrostep: 2,
+          microstep: 1,
+          round: 3,
+          payload: %{"label" => "hi"}
+        }
+      ]
+
+      {:ok, log} = EventLog.build(messages)
+      [macrostep] = log.macrosteps
+      [round] = macrostep.rounds
+
+      assert macrostep.effects == []
+      assert round.round == 3
+      assert [%Message{type: "effect.log"}] = round.messages
+    end
+
     test "effect.budget_exhausted lands in its round, not in Macrostep.effects" do
       payload = %{
         "budget" => 10,
diff --git a/test/statifier_ui/trace/normalizer_test.exs b/test/statifier_ui/trace/normalizer_test.exs
index ca60270..8e866c8 100644
--- a/test/statifier_ui/trace/normalizer_test.exs
+++ b/test/statifier_ui/trace/normalizer_test.exs
@@ -211,10 +211,10 @@ defmodule StatifierUI.Trace.NormalizerTest do
         owner: {:transition, 0},
         macrostep: 1,
         microstep: 0,
-        round: 0
+        round: 2
       }
 
-      assert {:ok, %Message{type: "effect.log", macrostep: 1, microstep: 0, round: nil} = message} =
+      assert {:ok, %Message{type: "effect.log", macrostep: 1, microstep: 0, round: 2} = message} =
                Normalizer.normalize({:log, payload}, @ctx)
 
       assert message.payload == %{
@@ -234,14 +234,14 @@ defmodule StatifierUI.Trace.NormalizerTest do
         round: 0
       }
 
-      assert {:ok, %Message{type: "effect.done", round: nil} = message} =
+      assert {:ok, %Message{type: "effect.done", round: 0} = message} =
                Normalizer.normalize({:done, payload}, @ctx)
 
       assert message.payload == %{"configuration" => [0]}
       refute Map.has_key?(message.payload, "donedata")
     end
 
-    test "effect.budget_exhausted carries round, unlike every other core effect" do
+    test "effect.budget_exhausted carries round, like every core effect since sui-67d" do
       pending = [%Event{name: "go", type: :internal}]
 
       payload = %BudgetExhausted{
@@ -292,7 +292,7 @@ defmodule StatifierUI.Trace.NormalizerTest do
         round: 0
       }
 
-      assert {:ok, %Message{type: "effect.invoke", round: nil} = message} =
+      assert {:ok, %Message{type: "effect.invoke", round: 0} = message} =
                Normalizer.normalize({:invoke, payload}, @ctx)
 
       assert message.payload["invoke_id"] == "inv1"
@@ -349,7 +349,7 @@ defmodule StatifierUI.Trace.NormalizerTest do
         round: 0
       }
 
-      assert {:ok, %Message{type: "effect.send", round: nil} = message} =
+      assert {:ok, %Message{type: "effect.send", round: 0} = message} =
                Normalizer.normalize({:send, payload}, @ctx)
 
       assert message.payload["id_from_author"] == true
@@ -714,7 +714,7 @@ defmodule StatifierUI.Trace.NormalizerTest do
                 type: "effect.datamodel_change",
                 macrostep: 2,
                 microstep: 1,
-                round: nil
+                round: 0
               } = message} = Normalizer.normalize({:datamodel_change, payload}, @ctx)
 
       assert message.payload == %{