diff --git a/.claude/board/AGENT_LOG.md b/.claude/board/AGENT_LOG.md
index 0859876a..988c071e 100644
--- a/.claude/board/AGENT_LOG.md
+++ b/.claude/board/AGENT_LOG.md
@@ -1,3 +1,6 @@
+## 2026-06-23 (cont.³⁷) — sealed the capstone OUT/IN-leg public surface + end-to-end mixed-trigger test
+
+**Main thread (Opus), self-directed ("what do you want").** Disk reality: ~11 GB free vs ~14-18 GB for the lance/datafusion build (ENOSPC'd twice) → S3-live is **disk-walled in this env**, not permission-gated; its home is the symbiont golden-image harness (already pulls lance-7). So took the feasible completion: made the shipped OUT/IN-leg drivers an actual crate surface. `lance-graph-supervisor/lib.rs` now re-exports `deliver_kanban_step`, `drive_mul_advance`, `drive_scheduled_tick`, `drive_version_tick`, `run_to_absorbing`, `KanbanRouteError` (were module-path-only; only `KanbanActor`/`KanbanMsg` were public) — the surface the live S3 consumer will `use` when it lands. **+1 test (15 total green):** `mixed_triggers_compose_on_one_owner_s2_gate_then_s3_ticks` — the capstone integration: the S2 MUL gate takes the first Rubicon step (Flow qualia → Planning→CognitiveWork) and S3 version ticks (`run_to_absorbing`) carry the rest to Commit, proving the two DIFFERENT triggers compose on ONE mailbox-as-owner (no panic, no spurious rejection, lands absorbing). clippy + fmt clean; light build. The actor-side capstone is now a sealed, consumable surface; only the disk-gated live wiring (S3 `versions()` source, S2 shader-driver loop) remains, to be done where the heavy build fits. Rides a PR on jirak.
 ## 2026-06-21 (cont.³⁶) — run-NaN COGNITIVE half PROVEN green (#580 handoff) + fixed the ogar_codebook drift that blocked it
 
 **Main thread (Opus), cognitive-compilation session.** Picked up the cognitive
diff --git a/crates/lance-graph-supervisor/src/kanban_actor.rs b/crates/lance-graph-supervisor/src/kanban_actor.rs
index b715822b..2757cd98 100644
--- a/crates/lance-graph-supervisor/src/kanban_actor.rs
+++ b/crates/lance-graph-supervisor/src/kanban_actor.rs
@@ -824,4 +824,47 @@ mod tests {
         actor.stop(None);
         handle.await.expect("actor join");
     }
+
+    #[tokio::test]
+    async fn mixed_triggers_compose_on_one_owner_s2_gate_then_s3_ticks() {
+        // The capstone integration: the S2 MUL gate and the S3 version tick are
+        // DIFFERENT triggers driving the SAME owner. Here the first Rubicon step
+        // is taken by a MUL gate (Flow qualia → Planning→CognitiveWork) and the
+        // rest by version ticks (run_to_absorbing → …→Commit). Both compose
+        // cleanly on one mailbox-as-owner: no panic, no spurious rejection, lands
+        // absorbing.
+        let (actor, handle) = Actor::spawn(
+            None,
+            KanbanActor::<TestBoard>::default(),
+            board(KanbanColumn::Planning),
+        )
+        .await
+        .expect("spawn");
+
+        // S2: the MUL gate takes the first step (Flow qualia + mantissa>0).
+        let flow_q = QualiaI4_16D(0).with(3, 4).with(14, 3).with(9, 4).with(1, 2);
+        let gated = drive_mul_advance(&actor, flow_q, 4)
+            .await
+            .expect("gate driver ok")
+            .expect("Flow advances");
+        assert_eq!(gated.from, KanbanColumn::Planning);
+        assert_eq!(gated.to, KanbanColumn::CognitiveWork);
+
+        // S3: version ticks carry the rest of the arc to the absorbing column.
+        let tail = run_to_absorbing(&actor, 16)
+            .await
+            .expect("ticks reach absorbing");
+        let arc: Vec<_> = tail.iter().map(|m| m.to).collect();
+        assert_eq!(
+            arc,
+            vec![KanbanColumn::Evaluation, KanbanColumn::Commit],
+            "S3 ticks resume from where the S2 gate left the owner"
+        );
+
+        let phase = ractor::call!(actor, |reply| KanbanMsg::Phase { reply }).expect("rpc");
+        assert_eq!(phase, KanbanColumn::Commit);
+
+        actor.stop(None);
+        handle.await.expect("actor join");
+    }
 }
diff --git a/crates/lance-graph-supervisor/src/lib.rs b/crates/lance-graph-supervisor/src/lib.rs
index b18a3152..43871306 100644
--- a/crates/lance-graph-supervisor/src/lib.rs
+++ b/crates/lance-graph-supervisor/src/lib.rs
@@ -64,7 +64,10 @@ pub mod actors;
 pub mod kanban_actor;
 
 #[cfg(feature = "supervisor")]
-pub use kanban_actor::{KanbanActor, KanbanMsg};
+pub use kanban_actor::{
+    deliver_kanban_step, drive_mul_advance, drive_scheduled_tick, drive_version_tick,
+    run_to_absorbing, KanbanActor, KanbanMsg, KanbanRouteError,
+};
 
 #[cfg(feature = "supervisor")]
 pub use supervisor::{