diff --git a/engineering/0015/SESSION-0015.0-TRANSCRIPT-2026-06-10T14-39--INPROGRESS.md b/engineering/0015/SESSION-0015.0-TRANSCRIPT-2026-06-10T14-39--INPROGRESS.md
new file mode 100644
index 0000000..deb8c50
--- /dev/null
+++ b/engineering/0015/SESSION-0015.0-TRANSCRIPT-2026-06-10T14-39--INPROGRESS.md
@@ -0,0 +1,24 @@
+# Session 0015.0 — Transcript
+
+> App: engineering
+> Start: 2026-06-10T14-39 (PST)
+> Type: planning-and-executing
+> Claude-Session: 4b3c17a0-bb1f-4c5d-b7ee-a910c948be0a
+> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
+>
+> This file reserves session ID 0015 for engineering. The driver replaces this
+> body with the full transcript and renames the file to its final
+> SESSION-0015.0-TRANSCRIPT-2026-06-10T14-39--<end>.md form at session end.
+
+## Launch prompt
+
+```
+/goal implement engineering#35 — land the Claude Design vs Claude Code rubric doc and wire the recorded decision into solution-design/GUIDE.md + TEMPLATE.md, referencing the new design-system/ as the code-resident design system
+
+```
+
+## 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/engineering/sessions.json b/engineering/sessions.json
index d64ca93..d301b04 100644
--- a/engineering/sessions.json
+++ b/engineering/sessions.json
@@ -40,5 +40,8 @@
   },
   "0014": {
     "title": ""
+  },
+  "0015": {
+    "title": ""
   }
 }