Describe the historical oracle runs precisely

README.md

@@ -71,10 +71,12 @@ describes coding-agent runs, batch runs, and results.
 
 ## Validation
 
-During benchmark construction, every task's bundled oracle solution was run through
-its verifier; these runs are historical records. The files in this release were
-checked statically: each task passes the repository's asset check, and every file
-matches `manifest.json` and the Harbor Hub package.
+During benchmark construction (August to September 2026), every task's bundled oracle
+solution was run through its verifier with Harbor 0.22.0. Those runs used earlier versions
+of the task files, and 69 of the 70 tasks reached reward 1 on every case of the version they
+ran. The files in this release were checked statically, without new oracle runs: each task
+passes the repository's asset check, and every file matches `manifest.json` and the Harbor
+Hub package.
 
 ## License and terms