Validation performed 4 November 2026 against synthetic data only.
PHP 8.3.6: all 44 PHP files passed syntax checking.
Deduction limit tests: 9 aggregate boundary/invalid cases + 2 employer-loan cases passed.
Calculation engine: 43 checks passed (PAYE band edges, NSSF caps/matching, SHA floor, benefit/cash separation, deduction/relief limits, invalid inputs and attendance).
MariaDB 10.11.14: 15 transaction/workflow checks passed (tenant isolation, advances, no draft P9, rollback, separate approval, stale input blocking, final snapshots, closed period locking).
Authenticated HTTP rendering: 9 pages passed, including populated P9, statutory schedule and payslip pages.
Browser interactions, official portal acceptance and remote hosting were not tested.
Legal coverage exclusions and open release gates are detailed in RELEASE_REVIEW.md.
