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Step 501: add cross-language port scenario and tests

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Bill
2026-02-16 22:37:47 -07:00
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@@ -7678,3 +7678,37 @@ with Rust as the migration target.
- `editor/src/LegacyModernizationScenarioRunner.h` within header-size limit (`125` <= `600`)
- `editor/tests/step500_test.cpp` within test-file size guidance (`147` lines)
- Header-only architecture and naming conventions remain aligned with `ARCHITECTURE.md`
### Step 501: Scenario - Cross-Language Port
**Status:** PASS (12/12 tests)
Implements the third Phase 25b end-to-end scenario for porting a Python ML-style
pipeline to Rust with confidence and review gating.
**Files added:**
- `editor/src/CrossLanguagePortScenarioRunner.h` - scenario orchestration across:
- Python function intake and hot-loop tagging
- intent-driven semantic transpilation (`python` -> `rust`)
- memory model analysis (GC -> borrow-checked target model)
- concurrency translation (`asyncio`/async-await -> Rust tokio-oriented runtime notes)
- per-function confidence scoring and low-confidence review surfacing
- behavioral equivalence assertion generation
- `editor/tests/step501_test.cpp` - 12 scenario tests covering:
- language/source expectations and function extraction
- hot-loop identification
- idiomatic transpilation patterns
- memory/concurrency translation expectations
- confidence/review semantics
- equivalence assertion generation and scenario notes
- `editor/CMakeLists.txt` - `step501_test` target
**Verification run:**
- `cmake -S editor -B editor/build-native` - PASS
- `cmake --build editor/build-native --target step501_test step500_test` - PASS
- `./editor/build-native/step501_test` - PASS (12/12)
- `./editor/build-native/step500_test` - PASS (12/12) regression coverage
**Architecture gate check:**
- `editor/src/CrossLanguagePortScenarioRunner.h` within header-size limit (`127` <= `600`)
- `editor/tests/step501_test.cpp` within test-file size guidance (`165` lines)
- Header-only architecture and naming conventions remain aligned with `ARCHITECTURE.md`