Releases · Engine

Apple Metal

The published lane. One runtime, four models, and an installation that verifies itself before it runs.

LANE OPEN FIRST PUBLIC RELEASE 2026.09.20

Current release

2026.09.20 — first published package

Version: 2026.09.20 · catalogue 2026.09.16
Operating system: macOS on Apple Silicon (arm64). Nothing is compiled on your machine.
Devices: M1, M2, M3, M4 and M1 Ultra declared. Exercised on M4 Pro, M1 Ultra, M1 Max and M2 Pro.
Models: Qwen2.5 0.5B / 1.5B / 7B (base) and Qwen3-1.7B (base). Other architectures are refused, not attempted.
Context: 32,768 tokens per core, prompt and generation combined.
Artifact: 10 MB, 14 files, checksummed end to end.
Build path: No interpreter anywhere in the build or install path.

Weights are prepared on the device as the checkpoint loads. There is no import step, no converted file, and nothing written back to disk. A 14,525 MiB checkpoint is ready as 3,923 MiB of device memory.
Context opened to 32,768 tokens (2026-09-16), verified by recall rather than by declaration, across every model in the package.
Improved prefill execution for supported GQA models, and better use of wider GPUs.
Strengthened package integrity and component compatibility checks. An installation that does not verify does not run.

Checkpoints: Hugging Face safetensors, read in place from your own cache. Nothing is downloaded on your behalf in this release.
Components are matched, not mixed. Parts from different releases are detected and refused before anything runs.
Packs: the calibrated pack format is not produced yet. When it is, an engine will state the pack versions it accepts and refuse the rest rather than guessing.
CLI contract: exit codes are frozen — 0 success, 2 usage, 4 model not found, 5 integrity failure, 6 device or runtime unavailable.

Component compatibility is now checked rather than assumed, so a mismatched installation fails visibly instead of degrading quality.
Every verb now reaches the CLI. An earlier launcher passed arguments straight through, so version, doctor and run all behaved alike.
Exit codes now match the published contract exactly.

CHECKSUMSEvery file in the archive verified on install14 / 14 OK

INSTALLATIONThe runtime verifies itself and its components before it will runfail closed

CATALOGUESigned, and doctor reports the resultsigned

veizik.limits · 2026.09.20

Quantisation is uncalibrated. Output is coherent but below the calibrated profile; on the 0.5B model it is noticeably so.
Greedy decoding only. No temperature, top-p or top-k yet.
You bring the checkpoint. The runtime reads your Hugging Face cache; it does not fetch weights for you in this release.
Base checkpoints only for the registered models. Instruction-tuned variants are not registered.
Four models in this package. Other architectures are refused rather than attempted.

History

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