claim session 0058 (placeholder) + sessions.json entry

0058/SESSION-0058.0-TRANSCRIPT-2026-06-01T06-28--INPROGRESS.md

@@ -0,0 +1,18 @@
+# Session 0058.0 — Transcript
+
+> Date: 2026-06-01
+> Start: 2026-06-01T06-28 (PST implied)
+> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
+>
+> This file reserves session ID 0058. The driver replaces this body
+> with the full transcript before publishing, and renames the file to
+> its final SESSION-0058.0-TRANSCRIPT-2026-06-01T06-28--<end>.md form.
+
+---
+
+## Launch prompt
+
+```
+Build the flotilla preview feature specified in ohm-rfc-app-flotilla/SPEC.md §19.2 ("Per-PR preview environments"). The DB and audit-trail questions are already settled there (SQLite-only seeded images; production-only §10 trail). You must resolve the two open forks first: (1) runtime — Cloud Run (recommended; needs rfc-app containerized, which also unblocks the broader Cloud Run migration) vs. VM-containers; and (2) the invariant-5 trigger — start with operator-typed preview up --pr=N, deferring auto-on-PR to the hosted-flotilla shift. Then promote the verb surface from §19.2 into the §12.1 inventory as it ships. This is an OHM driver session if it touches the VM/Cloud Run or a §13 record — claim a session ID at start.
+
+```