Retain received complete and unfinished Rizin command bytes with bounded UTF-8 capture, truthful completion uncertainty and exact launch provenance. Keep captures independent of cancellation, protocol and cleanup precedence; wait for bounded output settlement on exit and preserve active bytes across stdin failures.
Validated353 focused tests (one existing skip), full CI static/docs checks, real official Linux Rizin0.9.1 interruption probes, paired completed public CLI/stdio MCP tasks, and focused mutation checks. Required CI passed; exact-head Codex review reported no findings and Greptile5/5. Fault cleanup uncertainty and partial-marker ambiguity remain explicit.
Fixes#4015. Follow-up to #4227.
Ysopwnable
1ff705473a