pgw#626 / th#1059 twin: mandatory-lane admission follows the hub-resolved execution lane (0.50.1)#378
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…lved execution lane, not the flavor token (0.50.1) The #fp8-w8a8 flavor names the STORAGE format; SDXL's mixed variant serves the w8a16 upcast lane (plain graphs, never scaled_mm). _ref_mandatory_lane classified any #fp8-w8a8 ref as mandatory-w8a8, so _validate_required_compile refused every hub dispatch for the mixed lane with required_compile_missing — the worker half of the 2026-07-23 sdxl P0 (live user-visible failures at 21:54Z once tensorhub th#1059 started dispatching sdxl again). Executor._resolved_mandatory_lane derives mandatory-ness from the HelloAck resolution lane when known (w8a8/w4a4 activations stay fail-closed; plain activations admit and JIT-warm like bf16); the flavor token remains the fallback without lane evidence; conflicting evidence fails closed. All six derivation sites swapped. Tests: test_mandatory_lane_th1059.py incl. the exact live failure shape.
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Worker half of the 2026-07-23 sdxl P0 (tensorhub th#1059). The
#fp8-w8a8flavor token names the STORAGE format; SDXL's mixed variant executes the w8a16 upcast lane (plain graphs)._validate_required_compile(and 5 sibling mandatory-lane derivations) keyed on the flavor token and refused every hub dispatch withrequired_compile_missing— Paul's live jobs failed at 21:54Z once the hub half started dispatching sdxl again.Executor._resolved_mandatory_lane: mandatory-ness follows the HelloAck resolution lane when known (w8a8/w4a4 stay fail-closed; plain activations admit + JIT-warm like bf16); flavor-token fallback without lane evidence; conflicting evidence fails closed.test_mandatory_lane_th1059.py(6, incl. the exact live failure shape); mypy + ruff clean.After merge: tag v0.50.1 (PyPI publish action), then sdxl image rebuild/republish (tracked in pgw#626 / th#1059).
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