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urt-rs / docs /research /QVM_HISTORY_APPEND.md
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qvm: history append producer
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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 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.