diff --git a/app/schemas.py b/app/schemas.py
index 69a8117..fbb53b2 100644
--- a/app/schemas.py
+++ b/app/schemas.py
@@ -151,7 +151,6 @@ class WsFrameType(str, Enum):
     floating_request = "floating_request"
     stream_start = "stream_start"
     stream_text = "stream_text"
-    stream_block = "stream_block"
     stream_end = "stream_end"
     floating_domain = "floating_domain"
     data_request = "data_request"
@@ -275,15 +274,6 @@ class WsStreamText(BaseModel):
     chunk: str
 
 
-class WsStreamBlock(BaseModel):
-    """Server → Client: structured block (chart, table, entity, timeline)."""
-
-    type: Literal[WsFrameType.stream_block] = WsFrameType.stream_block
-    request_id: str
-    block_type: Literal["chart", "entity_ref", "table", "timeline"]
-    data: dict[str, Any]
-
-
 class WsStreamEnd(BaseModel):
     """Server → Client: signals end of a streaming response."""
 
diff --git a/tests/test_schemas_v3.py b/tests/test_schemas_v3.py
index 054c9d3..de1b0c6 100644
--- a/tests/test_schemas_v3.py
+++ b/tests/test_schemas_v3.py
@@ -9,7 +9,6 @@ from app.schemas import (
     WsFloatingDomain,
     WsFloatingRequest,
     WsFloatingScope,
-    WsStreamBlock,
     WsStreamEnd,
     WsStreamStart,
     WsStreamText,
@@ -25,7 +24,6 @@ def test_v3_frame_types_exist():
         "floating_request",
         "stream_start",
         "stream_text",
-        "stream_block",
         "stream_end",
         "floating_domain",
         "data_request",
@@ -174,66 +172,6 @@ def test_stream_text_deserializes():
     assert frame.chunk == "test"
 
 
-# ── WsStreamBlock ─────────────────────────────────────────────────────
-
-
-def test_stream_block_chart():
-    data = {
-        "type": "chart",
-        "chartType": "bar",
-        "title": "Tasks",
-        "data": [{"name": "Done", "count": 5}],
-        "config": {"count": {"label": "Count", "color": "#4f46e5"}},
-    }
-    frame = WsStreamBlock(request_id="r1", block_type="chart", data=data)
-    assert frame.type == WsFrameType.stream_block
-    assert frame.block_type == "chart"
-    assert frame.data["chartType"] == "bar"
-
-
-def test_stream_block_entity_ref():
-    frame = WsStreamBlock(
-        request_id="r1",
-        block_type="entity_ref",
-        data={"type": "task", "id": "t-1", "title": "Fix bug"},
-    )
-    assert frame.block_type == "entity_ref"
-
-
-def test_stream_block_table():
-    frame = WsStreamBlock(
-        request_id="r1",
-        block_type="table",
-        data={"headers": ["A", "B"], "rows": [["1", "2"]]},
-    )
-    assert frame.block_type == "table"
-
-
-def test_stream_block_timeline():
-    frame = WsStreamBlock(
-        request_id="r1",
-        block_type="timeline",
-        data={"timelines": [{"id": "c1", "title": "Launch", "date": 1700000000}]},
-    )
-    assert frame.block_type == "timeline"
-
-
-def test_stream_block_invalid_type():
-    with pytest.raises(ValidationError):
-        WsStreamBlock(
-            request_id="r1",
-            block_type="unknown",  # type: ignore[arg-type]
-            data={},
-        )
-
-
-def test_stream_block_serializes():
-    frame = WsStreamBlock(request_id="r1", block_type="table", data={"headers": [], "rows": []})
-    d = frame.model_dump()
-    assert d["type"] == "stream_block"
-    assert d["block_type"] == "table"
-
-
 # ── WsStreamEnd ───────────────────────────────────────────────────────