credit: Free Law Project / CourtListener as the source of this data

README.md

@@ -23,6 +23,21 @@ pretty_name: Humanity's Last Lawsuit (public split)
 
 # Humanity's Last Lawsuit — public split
 
+## Source & credit — Free Law Project / CourtListener
+
+HLL items are authored against real appellate opinions, and part of that record comes from
+**CourtListener**. Measured on this public Texas split (115 items): 103 cite an official Texas courts
+URL as their source of record and **12 cite <https://www.courtlistener.com> directly**; the DocketX
+opinion corpus the bank is drawn from (`docketx/us-caselaw`, `docketx/texas-caselaw`) is the Free Law
+Project / CourtListener bulk export of **2026-06-30**. CourtListener is a project of
+[Free Law Project](https://free.law) — a 501(c)(3) non-profit building free public access to American
+law since 2010. This benchmark does not exist without that record.
+
+**Free Law Project is a non-profit, and it is worth supporting: <https://free.law/donate/>.**
+If this data is useful to you, credit Free Law Project and CourtListener too, and consider going
+straight to the source: CourtListener runs its own
+[API and MCP server](https://wiki.free.law/c/courtlistener/help/api).
+
 The public split of HLL, a legal-reasoning benchmark built from REAL appellate opinions with the
 parties redacted. Each item: blinded facts + a question whose gold answer (disposition, controlling
 standard, authorities) is the court's actual decision — grading is fully mechanical against the