Cortex_A_0.5 / README.md
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fix: int8-int4 QAT + r0b0tlab data_dir loader (README.md)
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---
license: apache-2.0
base_model: Qwen/Qwen3.5-0.8B
library_name: transformers
tags:
- qwen3.5
- unsloth
- qat
- edge
- sft
- int8-int4
---
# Cortex A 0.5
General-purpose **edge** checkpoint: Qwen3.5-0.8B full SFT with Unsloth
**int8-int4 QAT** (4-bit weights + 8-bit dynamic activations). Target inference
footprint β‰ˆ **450MB including the vision tower**.
This repo stores:
- `checkpoint-*` β€” resumable Trainer states (optimizer + fake-quant QAT model)
- `training/live_metrics.json` β€” loss, MTP loss, ppl, val loss/ppl, tok/s, grad norm, lr
- `training/RESUME_POINTER.json` β€” last step for the next 12h Kaggle session
- `qat_converted/` β€” real 4-bit TorchAO export (only after a completed epoch run)
Training hardware: Kaggle **2Γ— Tesla T4**, hard stop **11.5h**, DDP via `torchrun`.
QAT scheme: **`int8-int4`**.