Experimental runtime artifact. Prepared locally only; not uploaded. This MLX package is an 8-bit conversion of the merged Pomona Nutrient/pH-EC v0.1.1 correction model, based on Qwen/Qwen2.5-0.5B-Instruct.

The source PEFT adapter passed its independent 140-case semantic evaluation with valid JSON, allowed labels/actions, nutrient label F1, blocked-action F1, and human-review match all at 1.0000. Conversion quality must be measured separately.

The MLX conversion passed a five-case smoke test for valid JSON, required fields, allowed values, blocked-action F1, and human-review match. Its nutrient label F1 was 0.8667, so it is not release-ready and has not passed the full 140-case holdout. Do not treat this package as equivalent to the source LoRA.

The Pomona guarded hybrid path applies deterministic rules after model generation. With that guard enabled, the same 140-case holdout reached valid JSON, allowed labels/actions, nutrient label F1, blocked-action F1, and human-review match of 1.0000 in every category. This measures the complete Pomona deployment path, not standalone MLX reasoning.

This is a narrow structured-output advisory reasoner for pH and EC telemetry. It must not change fertigation, inject nutrients, dose chemicals, control actuators, or provide a definitive disease diagnosis. Keep it behind Pomona's deterministic nutrient validation, safety checker, and human approval workflow.

Serve locally with MLX-LM:

Use the exact training prompt and deterministic validation. The package is intended for local Apple Silicon experimentation until a full independent runtime evaluation passes.

For the guarded path, use scripts/models/guard_nutrient_ph_ec_output.py or the Pomona model-router deterministic route. guarded_evaluation.json records the guarded result; evaluation.json records the unguarded model-only result.