diff --git a/mcp/src/lab/wfbench/workflows/wfbench-run.yaml b/mcp/src/lab/wfbench/workflows/wfbench-run.yaml
index df93c9953..a08c4b86d 100644
--- a/mcp/src/lab/wfbench/workflows/wfbench-run.yaml
+++ b/mcp/src/lab/wfbench/workflows/wfbench-run.yaml
@@ -97,11 +97,23 @@ steps:
       node_data: "{{ roster.trigger.node_data }}"
       namespace: "{{ input.namespace || params.namespace }}"
 
+  # graph/* steps return an error STRING instead of throwing (a rejected
+  # write is fail-soft), so a roster that did not land shows up as a missing
+  # ref_id. Gate the hop/edge/link chain on it: without this the neighbors
+  # hop's schema rejects the undefined ref_id and the whole run errors —
+  # after the callback already went out (observed live on swarm38).
+  - id: roster_ok
+    type: if
+    depends: trig
+    config:
+      cond: "{{ evalset.ref_id && trig.ref_id }}"
+
   # hop_check_trigger_exists + guard_first_run: prior triggers ⇒ HAS_TRIGGER,
   # none ⇒ HAS_BASELINE_TRIGGER.
   - id: hop
     type: graph/graph-neighbors
-    depends: trig
+    depends: roster_ok
+    when: true
     config:
       ref_id: "{{ evalset.ref_id }}"
       edge_type: [HAS_TRIGGER, HAS_BASELINE_TRIGGER]
@@ -352,9 +364,11 @@ steps:
       judge_model: "{{ params.judgeModel }}"
 
   # ── record (58312's twin) ─────────────────────────────────────────────
+  # Depends on the gate too, so it runs whether or not the roster landed
+  # (a skipped `link` alone would skip-propagate).
   - id: chain
     type: wfbench/build-eval-output
-    depends: [scores, link]
+    depends: [scores, link, roster_ok]
     config:
       task_slug: "{{ task.task_slug }}"
       scores: "{{ scores }}"
@@ -432,6 +446,8 @@ steps:
       n_materials: "{{ mats.n_materials }}"
       material_warnings: "{{ mats.warnings }}"
       graph:
+        roster_ok: "{{ roster_ok }}"
+        evalset: "{{ evalset }}"
         evalset_ref_id: "{{ evalset.ref_id }}"
         trigger_ref_id: "{{ trig.ref_id }}"
         trigger_id: "{{ roster.trigger_id }}"
diff --git a/vein/src/graph/schema-resolver.test.ts b/vein/src/graph/schema-resolver.test.ts
index 58c4dfa22..32ed675c8 100644
--- a/vein/src/graph/schema-resolver.test.ts
+++ b/vein/src/graph/schema-resolver.test.ts
@@ -78,7 +78,7 @@ describe("jarvis ontology + resolver + jarvis-typed writes (live Neo4j)", { skip
     assert.ok(names.constraints.includes("unique_document_node_key"));
   });
 
-  it("resolves types case-insensitively (labels → Schema.type), Vein types exactly", async () => {
+  it("resolves types case-insensitively (Schema.type → labels), Vein types exactly", async () => {
     assert.equal(await resolver.resolveType("evalset"), "EvalSet");
     assert.equal(await resolver.resolveType(" document "), "Document");
     assert.equal(await resolver.resolveType("VeinRun"), "VeinRun");
@@ -87,6 +87,28 @@ describe("jarvis ontology + resolver + jarvis-typed writes (live Neo4j)", { skip
     assert.equal(await resolver.resolveType("*"), null);
   });
 
+  it("a LEGACY case-variant label with no Schema never shadows the real type (swarm38's Evalset/EvalSet)", async () => {
+    // A long-lived jarvis graph carries labels from earlier node generations
+    // next to the schema-backed ones (swarm38 lists Evalset/Evaltrigger/…
+    // with zero nodes; Neo4j 5 drops label tokens once unused, so keep one
+    // legacy node per label alive here — the resolver must not be fooled
+    // either way).
+    await bolt.run(`CREATE (a:Evalset {ref_id: "legacy-1"}), (b:Evaltrigger {ref_id: "legacy-2"})`);
+    const labels = await bolt.run(`CALL db.labels() YIELD label WHERE toLower(label) = "evalset" RETURN collect(label) AS l`);
+    assert.deepEqual([...(labels[0]!["l"] as string[])].sort(), ["EvalSet", "Evalset"], "both spellings are registered labels");
+    resolver.invalidate();
+    assert.equal(await resolver.resolveType("EvalSet"), "EvalSet");
+    assert.equal(await resolver.resolveType("evalset"), "EvalSet");
+    assert.equal(await resolver.resolveType("EvalTrigger"), "EvalTrigger");
+    assert.ok(await resolver.schema("EvalSet"), "the EvalSet Schema resolves through the legacy label");
+    // A jarvis-typed write — the exact call that failed on swarm38.
+    const r = await nodes.write({ type: "EvalSet", data: { id: "legacy-label-probe", name: "probe" } }, "create");
+    assert.ok(r.ref_id);
+    const written = await bolt.run(`MATCH (n:EvalSet {id: "legacy-label-probe"}) RETURN labels(n) AS l`);
+    assert.ok((written[0]!["l"] as string[]).includes("EvalSet"));
+    assert.ok(!(written[0]!["l"] as string[]).includes("Evalset"));
+  });
+
   it("merges CHILD_OF ancestors, exposes index/domain, forces name optional", async () => {
     const doc = (await resolver.schema("document"))!;
     assert.equal(doc.type, "Document");
diff --git a/vein/src/graph/schema-resolver.ts b/vein/src/graph/schema-resolver.ts
index 1548e0f99..371b167f9 100644
--- a/vein/src/graph/schema-resolver.ts
+++ b/vein/src/graph/schema-resolver.ts
@@ -113,7 +113,13 @@ export class SchemaResolver {
   /**
    * Canonical type for a user-supplied string, or null. Vein types must
    * match exactly (registry); everything else resolves case-insensitively
-   * against live labels, then `Schema.type`.
+   * against `Schema.type` first, then live labels — exact case preferred in
+   * both. Schema first, because a long-lived jarvis graph carries LEGACY
+   * labels that differ only by case (`Evalset` next to `EvalSet`, with no
+   * nodes and no Schema): Neo4j keeps them in `db.labels()` forever, and
+   * "first label that matches case-insensitively" then canonicalizes to a
+   * type that has no Schema, so every write fails UNKNOWN_TYPE while the
+   * real schema sits right there.
    */
   async resolveType(raw: string, tx?: ManagedTransaction): Promise<string | null> {
     const key = raw.trim();
@@ -122,15 +128,21 @@ export class SchemaResolver {
     const c = this.types.get(key.toLowerCase());
     if (this.fresh(c)) return c.value;
     let out: string | null = null;
-    const labels = await this.rows(tx, `CALL db.labels() YIELD label WHERE toLower(label) = toLower($t) RETURN label LIMIT 1`, { t: key });
-    if (labels.length) out = String(labels[0]!["label"]);
+    const s = await this.rows(
+      tx,
+      `MATCH (n:Schema) WHERE toLower(n.type) = toLower($t) AND (n.is_deleted IS NULL OR n.is_deleted = false) AND n.type <> "*"
+       RETURN n.type AS t ORDER BY CASE WHEN n.type = $t THEN 0 ELSE 1 END, n.type LIMIT 1`,
+      { t: key },
+    );
+    if (s.length) out = String(s[0]!["t"]);
     else {
-      const s = await this.rows(
+      const labels = await this.rows(
         tx,
-        `MATCH (n:Schema) WHERE toLower(n.type) = toLower($t) AND (n.is_deleted IS NULL OR n.is_deleted = false) AND n.type <> "*" RETURN n.type AS t LIMIT 1`,
+        `CALL db.labels() YIELD label WHERE toLower(label) = toLower($t)
+         RETURN label ORDER BY CASE WHEN label = $t THEN 0 ELSE 1 END, label LIMIT 1`,
         { t: key },
       );
-      if (s.length) out = String(s[0]!["t"]);
+      if (labels.length) out = String(labels[0]!["label"]);
     }
     if (out && getVeinSchema(out)) out = getVeinSchema(out)!.type;
     this.types.set(key.toLowerCase(), { at: Date.now(), value: out });