Fixing festinger API

plugins/festinger/festinger/main.py

@@ -613,13 +613,18 @@ async def generate(request: Request) -> Response:
 async def anthropic_messages(request: Request) -> Response:
     cfg = request.app.state.yaml_config
     pool = request.app.state.pool
-    body = await request.json()
+    raw_body = await request.body()
+    body = json.loads(raw_body)
     # 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 stream=%s", model, upstream, original_stream)
+    log.info(
+        "chat  route=/v1/messages model=%s upstream=%s stream=%s  req_preview=%.200s",
+        model, upstream, original_stream,
+        raw_body[:200].decode(errors="replace").replace("\n", " "),
+    )
     try:
         headers = _relay_headers(request, ANTHROPIC_RELAY_HEADERS)
         if "anthropic-version" not in {k.lower() for k in headers}:
@@ -641,9 +646,18 @@ async def anthropic_messages(request: Request) -> Response:
             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")
+            sse_bytes = _anthropic_to_sse(raw)
+            log.info(
+                "streaming_response  provider=anthropic model=%s  converting json→sse  bytes=%d  preview=%.300s",
+                model, len(sse_bytes), sse_bytes[:300].decode(errors="replace"),
+            )
+            return Response(content=sse_bytes, media_type="text/event-stream")
+        resp_body = json.dumps(raw)
+        log.info(
+            "json_response  provider=anthropic model=%s  bytes=%d  preview=%.300s",
+            model, len(resp_body), resp_body[:300],
+        )
+        return Response(content=resp_body, media_type="application/json")
     except UpstreamError as exc:
         log.error("chat_upstream_error  route=/v1/messages model=%s  %s", model, exc)
         return Response(content=exc.content, status_code=exc.status_code, media_type=exc.content_type)