# Staffing Change: Foundation Reviewer R4 Bash Recovery > Team revision: `rev-p9.1-1 -> rev-p9.1-1` > Status: `APPLIED` > Type: `REPLACE` > Proposed by: `PMO / 2026-08-13T05:29:53Z` > Approved by: `PROJECT.md environment recovery policy and Owner instruction to continue` R3 stopped INVALID before product gates because zsh reserved variables prevented reliable exit/cleanup recording. R4 is an equal replacement: fixed `bd505d6`, writes none, fresh HAPI/session/archive/evidence. It must use `/bin/bash`, only `rc` and `review_root` for control variables, and pass a no-Godot harness preflight before import. Graph/spec/source/permissions/concurrency are unchanged. Rollback: any preflight/runtime/identity failure leaves R4 inbox or INVALID and does not modify product source. Final result: `APPLIED / pre-dispatch`.