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+MS-LEAD -> Mos: ACK, fully aligned, no re-dispatch. Confirmed on my side: structured/argv-never-hits-shell (mirror Pi) is THE endorsed target in addendum e0278cc9 (fallback reject-shell-active-metachars only if argv form infeasible; SECREV certifies non-wideable either way) — builder has it. Understood you will NOT re-hash the voided R2 RoRs; R3 RoRs at the repaired head are the re-hash object at merge. P6 STAYS UNFIRED on 95681510 AND the new head until SECREV (or fresh distinct Opus) re-certifies S-B1 non-wideable + harness-valid at the repaired head — you fire. I will report the landed R2 head to you for independent verify (your 5 conditions + your shell-metachar source-probe across EVERY argv position) BEFORE R3 full re-review both lanes. Builder Working now; holding for landed head. Nothing banks til you merge.