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# Milestone: AVM ISA 1:1 Port Coverage
**Goal:** Every language with an LSP installed on the build infrastructure
must have a complete, Lean-validated AVM ISA v1 port with cross-implementation
test harness.
## Coverage Matrix
| # | Language | LSP | AVM Port | Tests | Wolfram Validated | Status |
|---|----------|-----|----------|-------|-------------------|--------|
| 1 | Lean | `lean --server` | `formal/SilverSight/AVMIsa/` | `E2E.lean` | ✅ | **Reference** |
| 2 | Rust | `rust-analyzer` | `rust/src/avm/mod.rs` | `test_add_q16` | ✅ | ✅ |
| 3 | Python | `pyright` | `python/avm.py` | `test_avm_python.py` | ❌ | ✅ |
| 4 | Coq | `coq-lsp` | `coq/AVMIsa/avm.v` | `coq/AVMIsa/test_avm.v` | ❌ | 🔄 |
| 5 | R | — | `r/AVMIsa/avm.r` | `test_avm.r` | ✅ | ✅ |
| 6 | Julia | — | `julia/AVMIsa/avm.jl` | `test_avm.jl` | ✅ | ✅ |
| 7 | Scala | `metals` | `scala/avm.scala` | `scala/TestAVM.scala` | ❌ | 🔄 |
| 8 | Go | — | `go/avm.go` | `go/avm_test.go` | ❌ | 🔄 |
| 9 | C | `clangd` | `c/avm.c` | `c/test_avm.c` | ❌ | 🔄 |
| 10 | C++ | `clangd` | `cpp/avm.hpp` | `cpp/test_avm.cpp` | ❌ | 🔄 |
| 11 | Fortran | `fortls` | `fortran/avm.f90` | `fortran/test_avm.f90` | ❌ | 🔄 |
| 12 | Octave | — | `octave/AVM.m` | `octave/test_avm.m` | ❌ | ✅ |
## 1:1 Verification Protocol
For each port, run the same test vector through every implementation:
```python
test_vector = [
# (op, a, b, expected_q16)
("add", 5*65536, 3*65536, 8*65536), # 5 + 3 = 8
("sub", 10*65536, 3*65536, 7*65536), # 10 - 3 = 7
("mul", 5*65536, 3*65536, 15*65536), # 5 * 3 = 15
("div", 10*65536, 2*65536, 5*65536), # 10 / 2 = 5
("lt", 5*65536, 3*65536, False), # 5 < 3 = false
("lt", -5*65536, -3*65536, True), # -5 < -3 = true
("add_sat", cload_max-1, 2, cload_max), # saturation
("div_neg", -5*65536, 3*65536, -1*65536), # floor division: -5/3 = -2
]
```
All results must match Lean `#eval` witnesses to pass.
## Action Items
1. **Python** — Write `tests/test_avm_python.py` with Lean-cross-validated test vector
2. **Coq** — Write `coq/AVMIsa/test_avm.v` with `Example` witnesses
3. **Scala** — Write test harness in `scala/src/test/`
4. **Go** — Write `go/avm_test.go`
5. **C** — Write `c/test_avm.c`
6. **C++** — Write `cpp/test_avm.cpp`
7. **Fortran** — Write `fortran/test_avm.f90`
8. **Octave** — Write `octave/test_avm.m`
9. **CI** — Add a GitHub Actions workflow that runs all port tests on every push
10. **Wolfram Alpha** — Re-audit all ports against the Lean reference
## Definition of Done
- [ ] All 12 ports pass the same cross-validated test vector
- [ ] Test outputs match Lean `#eval` witnesses for every operation
- [ ] CI pipeline runs all port tests on push
- [ ] Audit report (`docs/avm_ports_audit.md`) updated with "1:1" status