The ABI-stable branch clears torch >= 2.11 paired with torchcodec >= 0.12,
but everything else fell through to the lockstep matrix, which has no row
past torch 2.11. So torch 2.12 or 2.13 with torchcodec 0.10 or 0.11 hit
`allowed is None` and returned no hint at all, even though upstream pins
0.11 to torch 2.11 exactly and 0.10 to torch 2.10 exactly. torchcodec
ships no `Requires-Dist: torch`, so pip cannot catch it either and the
user only sees a raw "Could not load libtorchcodec" at first use.
Split the lookup into three cases: a torch minor below the table stays
silent as before, a torch minor with a row keeps the existing per-minor
pin and audio-torch2xx extra hint, and a torch minor at or past the
ABI-stable floor with no row now points at `torchcodec>=0.12.0`.
Mirror the same three-way split in scripts/notebook_validator.py's
R-INST-004 so the two stay in step, and cover both with tests plus a
regression test that torch below the table still produces no finding.
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