claim vscode-cowriting-plugin session 0013 (placeholder) + sessions.json entry

sessions/0013/SESSION-0013.0-TRANSCRIPT-2026-06-10T22-22--INPROGRESS.md

@@ -0,0 +1,23 @@
+# Session 0013.0 — Transcript
+
+> App: vscode-cowriting-plugin
+> Start: 2026-06-10T22-22 (PST)
+> Type: capture
+> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
+>
+> This file reserves session ID 0013 for vscode-cowriting-plugin. The driver replaces this
+> body with the full transcript and renames the file to its final
+> SESSION-0013.0-TRANSCRIPT-2026-06-10T22-22--<end>.md form at session end.
+
+## Launch prompt
+
+```
+/goal Capture Feature F5 (cross-rung git-native persistence format + round-trip to the Gitea substrate rung, per coauthoring-inner-loop.md §9 OPEN→F5, coauthoring-propose-accept.md §9 OPEN→F5, and rfc-app#46) as a typed issue under Epic #1 on benstull/vscode-cowriting-plugin, then brainstorm its Solution Design spec in a follow-up session.
+
+```
+
+## 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._

sessions/sessions.json

@@ -34,5 +34,8 @@
   },
   "0012": {
     "title": ""
+  },
+  "0013": {
+    "title": ""
   }
 }