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## Summary Adds a B200 (SM100) counterpart to the daily H100 cuTile CI job, so the cuTile suite runs on **both** archs — mirroring cuTeDSL, which already runs on H100 and B200. Arch-specific cuTile regressions (e.g. SM100/tcgen05 codegen issues) would otherwise go uncaught by CI. ## Changes - **`dev/modal/tests.py`** — new `liger_cutile_tests_b200` Modal function, identical to `liger_cutile_tests` but on B200. Installs `.[dev,cutile-tileiras]` (so `import cuda.tile` resolves and the tests run rather than `importorskip`) and runs `make test-cutile` (which sets `LIGER_KERNEL_IMPL=cutile`). - **`.github/workflows/nvi-ci.yml`** — adds a `cuTile (B200)` entry to the `daily` matrix and refreshes the surrounding comments. ## Strict `B200!` GPU spec Both B200 jobs now use the strict `gpu="B200!"` form, matching the H100 jobs' `H100!`. The `!` tells Modal not to substitute a different GPU family. This matters for arch-specific SM100 tests: without it, a fallback/substituted GPU could produce a **misleading pass**. This PR also flips the pre-existing `liger_cutedsl_tests_b200` from `"B200"` → `"B200!"` for consistency (small, related change — easy to drop if undesired). `max-parallel: 3` and the workflow-level concurrency group are unchanged, so the 5th daily matrix entry still runs at most 3 GPU jobs at once. ## Verification Locally on a B200: `LIGER_KERNEL_IMPL=cutile pytest test/cutile/` → **199 passed, 12 skipped**. The new job is meaningful and currently green on B200. Co-authored-by: GitHub Copilot <[email protected]> Co-authored-by: Copilot <[email protected]>