fix(stocktwits): decode HTML entities in message bodies

- bodies reach the prompt and the screen as plain text (S&P, wasn't) rather than escaped (S&P, wasn't)

tests/test_stocktwits_resilience.py

@@ -114,3 +114,10 @@ class TestStockTwitsScreening:
         with patch.object(stocktwits, "urlopen", return_value=_stream("SPAM")):
             out = stocktwits.fetch_stocktwits_messages("NVDA", screen=_drop_spam)
         assert "none of the 1 StockTwits messages is about $NVDA" in out
+
+
+@pytest.mark.unit
+def test_html_entities_in_message_bodies_are_decoded():
+    with patch.object(stocktwits, "urlopen", return_value=_stream("S&P wasn't up")):
+        out = stocktwits.fetch_stocktwits_messages("NVDA")
+    assert "S&P wasn't up" in out

tradingagents/dataflows/vendors/stocktwits.py

@@ -15,6 +15,7 @@ network call succeeded.
 from __future__ import annotations
 
 import contextlib
+import html
 import http.client
 import json
 import logging
@@ -54,6 +55,11 @@ def _within_window(messages, start_date, end_date):
     return [m for m in messages if in_window(_created_at(m), start_dt, end_dt)]
 
 
+def _body(message) -> str:
+    """The message text; the API serves it HTML-escaped (``&``, ``'``)."""
+    return html.unescape(message.get("body") or "")
+
+
 def _stocktwits_symbol(ticker: str) -> str:
     """Map a crypto pair to StockTwits' ``<BASE>.X`` convention.
 
@@ -115,7 +121,7 @@ def fetch_stocktwits_messages(
 
     note = ""
     if screen:
-        keep, note = screen([m.get("body") or "" for m in messages])
+        keep, note = screen([_body(m) for m in messages])
         screened = len(messages)
         messages = [m for m, kept in zip(messages, keep, strict=True) if kept]
         if not messages:
@@ -129,7 +135,7 @@ def fetch_stocktwits_messages(
         entities = m.get("entities") or {}
         sentiment_obj = entities.get("sentiment") or {}
         sentiment = sentiment_obj.get("basic") if isinstance(sentiment_obj, dict) else None
-        body = (m.get("body") or "").replace("\n", " ").strip()
+        body = _body(m).replace("\n", " ").strip()
         if len(body) > 280:
             body = body[:280] + "…"