diff --git a/ohm/0066/SESSION-0066.0-TRANSCRIPT-2026-06-03T17-00--INPROGRESS.md b/ohm/0066/SESSION-0066.0-TRANSCRIPT-2026-06-03T17-00--INPROGRESS.md
new file mode 100644
index 0000000..cc53aad
--- /dev/null
+++ b/ohm/0066/SESSION-0066.0-TRANSCRIPT-2026-06-03T17-00--INPROGRESS.md
@@ -0,0 +1,13 @@
+# Session 0066.0 — Transcript
+
+> App: ohm
+> Start: 2026-06-03T17-00 (PST)
+> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
+>
+> This file reserves session ID 0066 for ohm. The driver replaces this
+> body with the full transcript and renames the file to its final
+> SESSION-0066.0-TRANSCRIPT-2026-06-03T17-00--<end>.md form at session end.
+
+## Launch prompt
+
+_(launch prompt not captured at claim time)_
diff --git a/ohm/sessions.json b/ohm/sessions.json
index a21a273..5adf299 100644
--- a/ohm/sessions.json
+++ b/ohm/sessions.json
@@ -180,6 +180,9 @@
     "title": ""
   },
   "0065": {
-    "title": "RFC-app §22 M2 — project-scoped authorization + the §22.7 resolver"
+    "title": "RFC-app \u00a722 M2 \u2014 project-scoped authorization + the \u00a722.7 resolver"
+  },
+  "0066": {
+    "title": ""
   }
 }