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lfm3: admit official MLX text and VL checkpoints - #1513

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BlivionIaG wants to merge 2 commits into
ashhart:mainfrom
BlivionIaG:feature/lfm3-admission
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BlivionIaG wants to merge 2 commits into
ashhart:mainfrom
BlivionIaG:feature/lfm3-admission

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@BlivionIaG

@BlivionIaG BlivionIaG commented Oct 28, 2026 •

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Admit official LiquidAI LFM3-1.7B and LFM3-VL-2B MLX 4/6/8-bit metadata, without registering inference. Validate family geometry, quantization layouts and tensor headers. Add a host inspector and rejection tests through the normal build graph.

Refs #1491. This is the admission foundation requested in #1502; text inference will sit on this, with VL stacked above text. The original admission commit and authorship are preserved. CUDA follow-up #1508 already carries a cherry-pick of that admission.

Verification

Pinned base: b30d5b9d3. Zig 0.17.0, macOS 26.5.1, M4 Pro 48 GB: zig build test-lfm3-host tf-lfm3-check -Dcpu=apple_m1 passed 8/8 steps and 13/13 host tests; the admission Python suite passed 12/12. This slice performs no GPU inference and makes no runtime or performance qualification claim. The recipe links the weights' LFM Open License v1.0.

ATC overlaps from the full implementation include conflicts with concurrent work; this smaller admission slice is intended to establish shared ancestry. Integration must be reconciled before landing.

Prepare text and VL 4/6/8-bit checkpoints with revision-pinned header inspection and native metadata validation. Inference remains unregistered pending operator and model qualification.

Refs ashhart#1491
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