Add web research and source file reading

SovereignAI-Starter/app/workspace.py

@@ -98,6 +98,14 @@ def retrieve(task: str, root: Path, limit: int = 3) -> list[tuple[str, str]]:
         if relative.casefold() in mentioned_paths:
             score += 100_000
         if score:
-            ranked.append((score, relative, text[:1800]))
+            # If the user named a source file explicitly, include a larger bounded
+            # excerpt so the agent can explain the code rather than just locate it.
+            excerpt_limit = 12_000 if relative.casefold() in mentioned_paths else 1_800
+            ranked.append((score, relative, text[:excerpt_limit]))
     ranked.sort(key=lambda item: (-item[0], item[1]))
+    explicit_matches = [
+        item for item in ranked if item[1].casefold() in mentioned_paths
+    ]
+    if explicit_matches:
+        ranked = explicit_matches
     return [(relative, content) for _, relative, content in ranked[:limit]]