Caret and control characters added to the filename guard, file-keyed in-flight registry replacing the row-scoped one, try/catch around spawn, single finish() exit path, UTF-8 chunk decoding, bounded output buffer.
Caret and control characters added to the filename guard, file-keyed in-flight registry replacing the row-scoped one, try/catch around spawn, single finish() exit path, UTF-8 chunk decoding, bounded output buffer.