Kotlin current-byte combined gate: test_kotlin_oneof.py + test_kotlin.py
........................................................................ [ 97%]
..                                                                       [100%]
74 passed in 362.71s (0:06:02)

Additional mode/provenance golden test (added after combined collection; production unchanged):
1 passed, 55 deselected in 0.43s

Core/Python reference regression command described in RESULTS.md:
........................................................................ [  9%]
........................................................................ [ 18%]
........................................................................ [ 27%]
........................................................................ [ 36%]
........................................................................ [ 45%]
........................................................................ [ 54%]
........................................................................ [ 63%]
........................................................................ [ 73%]
........................................................................ [ 82%]
........................................................................ [ 91%]
....................................................................     [100%]
788 passed in 9.80s

Final standalone source/package example:
source:
oneof.payload_unexpected:text, oneof.payload_missing:number
repaired=true; snapshotIssues=2; virtualComplete=false
descriptor=kotlin-oneof-example.Content; fields=5

package:
oneof.payload_unexpected:text, oneof.payload_missing:number
repaired=true; snapshotIssues=2; virtualComplete=false
descriptor=kotlin-oneof-example.Content; fields=5


Kotlin1.9/JVM1.8 final example: compiled successfully and produced the same three output lines.
