mollusk feature test

Author: ananas-block

program-tests/CLAUDE.md

@@ -29,6 +29,15 @@ cargo test-sbf -p account-compression-test
 ```
 Tests for the core account compression program (Merkle tree management).
 
+### Mollusk VAS Reproducer
+```bash
+just program-tests::test-mollusk-vas-repro
+```
+Standalone reproducer for the account byte divergence caused by toggling
+Mollusk's `virtual_address_space_adjustments` feature. This crate is a nested
+workspace so its Mollusk/Solana `3.x`/`4.x` dependencies do not alter the root
+workspace dependency graph.
+
 ### Registry Tests
 ```bash
 cargo test-sbf -p registry-test

program-tests/justfile

@@ -15,6 +15,9 @@ test: build test-account-compression test-registry test-system test-system-cpi t
 test-account-compression:
     RUSTFLAGS="-D warnings" cargo test-sbf -p account-compression-test
 
+test-mollusk-vas-repro:
+    RUST_LOG=off cargo run --locked --offline --manifest-path mollusk-vas-repro/Cargo.toml
+
 test-registry:
     RUST_MIN_STACK=16777216 RUSTFLAGS="-D warnings" cargo test-sbf -p registry-test
 

program-tests/mollusk-vas-repro/.gitignore

@@ -0,0 +1,5 @@
+target/
+output/
+expected/
+fixtures/*
+!fixtures/.gitkeep