Removing streaming as this caused errors

plugins/festinger/festinger/main.py

@@ -221,6 +221,92 @@ OPENAI_RELAY_HEADERS = (
 )
 
 
+def _anthropic_to_sse(data: dict) -> bytes:
+    """
+    Convert a non-streaming Anthropic Messages API response into SSE bytes
+    that litellm expects when it sent stream=True.
+
+    Emits the minimal event sequence litellm's streaming parser requires:
+      message_start → content_block_start → content_block_delta(s)
+      → content_block_stop → message_delta → message_stop
+    """
+    def sse(event: str, payload: dict) -> str:
+        return f"event: {event}\ndata: {json.dumps(payload)}\n\n"
+
+    lines: list[str] = []
+
+    # message_start
+    lines.append(sse("message_start", {
+        "type": "message_start",
+        "message": {
+            "id": data.get("id", "msg_festinger"),
+            "type": "message",
+            "role": "assistant",
+            "content": [],
+            "model": data.get("model", ""),
+            "stop_reason": None,
+            "stop_sequence": None,
+            "usage": data.get("usage", {"input_tokens": 0, "output_tokens": 0}),
+        },
+    }))
+    lines.append(sse("ping", {"type": "ping"}))
+
+    content_blocks = data.get("content", [])
+    for idx, block in enumerate(content_blocks):
+        btype = block.get("type", "text")
+
+        if btype == "text":
+            lines.append(sse("content_block_start", {
+                "type": "content_block_start",
+                "index": idx,
+                "content_block": {"type": "text", "text": ""},
+            }))
+            lines.append(sse("content_block_delta", {
+                "type": "content_block_delta",
+                "index": idx,
+                "delta": {"type": "text_delta", "text": block.get("text", "")},
+            }))
+
+        elif btype == "tool_use":
+            lines.append(sse("content_block_start", {
+                "type": "content_block_start",
+                "index": idx,
+                "content_block": {
+                    "type": "tool_use",
+                    "id": block.get("id", ""),
+                    "name": block.get("name", ""),
+                    "input": {},
+                },
+            }))
+            lines.append(sse("content_block_delta", {
+                "type": "content_block_delta",
+                "index": idx,
+                "delta": {
+                    "type": "input_json_delta",
+                    "partial_json": json.dumps(block.get("input", {})),
+                },
+            }))
+
+        lines.append(sse("content_block_stop", {
+            "type": "content_block_stop",
+            "index": idx,
+        }))
+
+    # message_delta + message_stop
+    usage = data.get("usage", {})
+    lines.append(sse("message_delta", {
+        "type": "message_delta",
+        "delta": {
+            "stop_reason": data.get("stop_reason", "end_turn"),
+            "stop_sequence": data.get("stop_sequence"),
+        },
+        "usage": {"output_tokens": usage.get("output_tokens", 0)},
+    }))
+    lines.append(sse("message_stop", {"type": "message_stop"}))
+
+    return "".join(lines).encode()
+
+
 async def call_anthropic(body: dict, upstream: str, headers: dict) -> tuple[str, dict]:
     """
     Forward a request to the Anthropic Messages API (non-streaming).
@@ -528,10 +614,12 @@ async def anthropic_messages(request: Request) -> Response:
     cfg = request.app.state.yaml_config
     pool = request.app.state.pool
     body = await request.json()
+    # Capture streaming intent BEFORE call_anthropic forces stream=False
+    original_stream: bool = bool(body.get("stream", False))
     model = body.get("model", "unknown")
     upstream = cfg["upstream_anthropic"]
     min_len = cfg["detection"]["min_length"]
-    log.info("chat  route=/v1/messages model=%s upstream=%s", model, upstream)
+    log.info("chat  route=/v1/messages model=%s upstream=%s stream=%s", model, upstream, original_stream)
     try:
         headers = _relay_headers(request, ANTHROPIC_RELAY_HEADERS)
         if "anthropic-version" not in {k.lower() for k in headers}:
@@ -547,9 +635,14 @@ async def anthropic_messages(request: Request) -> Response:
             if override is not None:
                 raw["content"] = [{"type": "text", "text": override}]
                 raw["loop_detected"] = True
+                if original_stream:
+                    return Response(content=_anthropic_to_sse(raw), media_type="text/event-stream")
                 return Response(content=json.dumps(raw), media_type="application/json")
             text, raw = await call_anthropic(body, upstream, headers)
             record_and_check(sess, text, min_len)
+        if original_stream:
+            log.info("streaming_response  provider=anthropic model=%s  converting json→sse", model)
+            return Response(content=_anthropic_to_sse(raw), media_type="text/event-stream")
         return Response(content=json.dumps(raw), media_type="application/json")
     except UpstreamError as exc:
         log.error("chat_upstream_error  route=/v1/messages model=%s  %s", model, exc)