diff --git a/dev-claude-plugin/0042/SESSION-0042.0-TRANSCRIPT-2026-06-10T00-34--INPROGRESS.md b/dev-claude-plugin/0042/SESSION-0042.0-TRANSCRIPT-2026-06-10T00-34--INPROGRESS.md
new file mode 100644
index 0000000..ab24739
--- /dev/null
+++ b/dev-claude-plugin/0042/SESSION-0042.0-TRANSCRIPT-2026-06-10T00-34--INPROGRESS.md
@@ -0,0 +1,20 @@
+# Session 0042.0 — Transcript
+
+> App: dev-claude-plugin
+> Start: 2026-06-10T00-34 (PST)
+> Type: planning-and-executing
+> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
+>
+> This file reserves session ID 0042 for dev-claude-plugin. The driver replaces this
+> body with the full transcript and renames the file to its final
+> SESSION-0042.0-TRANSCRIPT-2026-06-10T00-34--<end>.md form at session end.
+
+## Launch prompt
+
+_(launch prompt not captured at claim time)_
+
+## Deferred decisions
+
+_Autonomous-mode low-confidence calls the driver made and would have
+liked operator input on. Appended as the session runs; surfaced at
+finalize. Empty if none._
diff --git a/dev-claude-plugin/sessions.json b/dev-claude-plugin/sessions.json
index 063533a..ca08b56 100644
--- a/dev-claude-plugin/sessions.json
+++ b/dev-claude-plugin/sessions.json
@@ -121,5 +121,8 @@
   },
   "0041": {
     "title": ""
+  },
+  "0042": {
+    "title": ""
   }
 }