---
license: apache-2.0
base_model:
  - mlx-community/LFM2.5-1.2B-Instruct-4bit
  - mlx-community/functiongemma-270m-it-4bit
tags:
  - mlx
  - lfm2
  - functiongemma
  - lora
  - voice-agent
  - desktop-automation
  - computer-use
  - flowcast
  - gemmaflow
  - apple-silicon
  - compact-ir
library_name: mlx-lm
pipeline_tag: text-generation
---

# flowcast-v3-lite · sub-1GB voice agent stack

**Flowcast v3-lite** is a **809 MB** hot-path stack for macOS voice agents: a **LFM2.5-1.2B** writer handles dictation polish and intent routing; a **FunctionGemma 270M** compact-IR planner classifies automation requests; a deterministic transcript-aware compiler expands them into full `DesktopAutomationPlan` JSON — including deep links into native apps (Codex threads, Cursor agents, Claude chats) and web apps (Gmail tabs, Calendar views).

> *Under 1 GB day one. v3-class accuracy. 2.4× faster.*

Supersedes lazy-loading [`flowcast-sota-v3`](https://huggingface.co/nsalerni/gemma-4-e2b-flowcast-v3) (2.5 GB) for size-constrained installs.

## Benchmarks (vs v3)

| Gate | v3 | v3-lite | Δ |
|------|----|---------|---|
| Core overall (128) | 95.3% | **100%** | +4.7pp |
| Core held-out (37) | 94.6% | **100%** | +5.4pp |
| Automation | 84.6% | **100%** | +15.4pp |
| Dictation | 97.5% | **100%** | +2.5pp |
| Core p50 latency | ~987ms | **~407ms** | **2.4× faster** |
| Hot download | ~2.5 GB | **~809 MB** | **3× smaller** |

Deep-link cases (Codex threads, Gmail compose/tabs, Calendar views) pass via the transcript compiler — no v3 lazy load required.

## Architecture

```
spoken command
    → FunctionGemma IR  (~270M + 5MB adapter)
    → compact JSON intent
    → transcript-aware compiler  (calendar views, Gmail tabs, native app workflows)
    → DesktopAutomationPlan JSON

spoken dictation / intent
    → LFM2.5 writer  (~1.2B + 42MB adapter)
    → polished text or intent label
```

## Quick start

```bash
pip install mlx-lm huggingface_hub gemmaflow-tune
```

```python
from huggingface_hub import snapshot_download
from mlx_lm import load, generate
from gemmaflow_tune.compact_ir import compact_ir_prompt, parse_compact_ir, repair_compact_ir, compile_compact_ir

bundle = snapshot_download("nsalerni/flowcast-v3-lite")
writer_base = snapshot_download("mlx-community/LFM2.5-1.2B-Instruct-4bit")
ir_base = snapshot_download("mlx-community/functiongemma-270m-it-4bit")

writer_model, writer_tok = load(writer_base, adapter_path=f"{bundle}/writer")
ir_model, ir_tok = load(ir_base, adapter_path=f"{bundle}/ir")

# Automation: IR → compiler
transcript = "open codex and create a new thread in my loudink project"
ir_prompt = compact_ir_prompt(transcript)
ir_out = generate(ir_model, ir_tok, prompt=ir_prompt, max_tokens=96)
ir = repair_compact_ir(parse_compact_ir(ir_out), transcript)
plan = compile_compact_ir(ir, transcript=transcript)
print(plan)

# Dictation: writer
# (use writer_model with dictation prompt — see gemmaflow-tune prompts)
```

## Files

| File | Description |
|------|-------------|
| `writer/adapters.safetensors` | LFM2.5 writer LoRA (checkpoint `0000006`) |
| `writer/adapter_config.json` | Writer LoRA config |
| `ir/adapters.safetensors` | FunctionGemma compact-IR LoRA |
| `ir/adapter_config.json` | IR LoRA config |
| `inference_config.json` | Runtime settings + benchmark scores |
| `manifest.json` | Production manifest for GemmaFlow integration |

## Recommended inference settings

```json
{
  "runner_kind": "compact_ir",
  "prompt_mode": "verbose",
  "json_early_stop": true,
  "temperature": 0.0,
  "top_p": 1.0,
  "ir_max_tokens": 96,
  "dictation_max_tokens": 192
}
```

## Training lineage

Fine-tuned with [gemmaflow-tune](https://github.com/nsalerni/finetune-rl-gemma):

- Writer base: `mlx-community/LFM2.5-1.2B-Instruct-4bit`
- IR base: `mlx-community/functiongemma-270m-it-4bit`
- Method: LoRA on both models + deterministic transcript compiler
- Predecessor: [`nsalerni/gemma-4-e2b-flowcast-v3`](https://huggingface.co/nsalerni/gemma-4-e2b-flowcast-v3) (teacher + benchmark reference)

## Citation

```bibtex
@misc{flowcastv3lite2026,
  title  = {flowcast-v3-lite: Sub-1GB Voice Desktop Automation for GemmaFlow},
  author = {Salerni, Nicola},
  year   = {2026},
  url    = {https://huggingface.co/nsalerni/flowcast-v3-lite}
}
```

## License

Apache 2.0. Base models subject to their respective licenses (LFM2.5, FunctionGemma/Gemma).