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+# Omnigraph v0.6.1
+
+## Highlights
+
+- **Legacy `__run__` cleanup (MR-770).** Removed the last remnant of the Run
+  state machine (retired in v0.4.0): the `__run__` branch-name guard. A new
+  v2→v3 `__manifest` internal-schema migration sweeps any stale `__run__*`
+  staging branches on the first read-write open, so `__run__*` is no longer a
+  reserved branch name.
+
+## Upgrade notes
+
+- Graphs created before v0.4.0 are migrated automatically on the first
+  read-write open by a v0.6.1 binary (one-time `__manifest` stamp v2→v3 sweep
+  of stale `__run__*` branches). No action required. The inert
+  `_graph_runs.lance` / `_graph_run_actors.lance` dataset bytes remain until a
+  future `delete_prefix` primitive; a read-only open of an un-migrated legacy
+  graph still lists `__run__*` until its first read-write open.