| from __future__ import annotations | |
| import re, json | |
| CIT = re.compile(r"\[(E_[A-Z0-9._-]+)\]") | |
| def citation_coverage(text:str)->float: | |
| # sentence-level coverage | |
| s=[x.strip() for x in re.split(r"(?<=[.!?])\s+", text.strip()) if x.strip()] | |
| if not s: return 0.0 | |
| ok=sum(1 for x in s if CIT.search(x)) | |
| return ok/len(s) | |
| def is_json_only(text:str)->bool: | |
| t=text.strip() | |
| if not (t.startswith("{") and t.endswith("}")): return False | |
| try: | |
| json.loads(t); return True | |
| except Exception: | |
| return False | |