| # History append shift and complete newest row writer | |
| RE-649. Reproduce with `python3 scripts/analyze_qvm_history_append.py`; check with `python3 scripts/test_qvm_history_append.py`. The [machine report](qvm-history-append.json) retains source identity and bounded fixtures. | |
| Complete142774–143028 guards null client, copies the20-row table to a source local buffer, copies its first19 rows back starting at row1, then writes row0. The source temporary makes the two copies nonoverlapping. Native−102 is modeled as explicit bounded aligned word copies, including packed animation bytes; original library code is not executed. The new head includes client6204/6256 at72/76, unlike reset, and preserves omitted header/padding words. Client4408 is preserved. Independent tests compare every word and exact copy sizes1600/1520. Call scheduling, time origin and reset triggers remain unresolved. | |
| No original executable/full QVM/native collision/physics/rendering executes. Native responses and legal input domains are supplied or unverified where stated; full runtime/macOS/Linux Rust/Bevy/Solari gameplay remains open. | |