# US-016 — Mining-style node startup CLI + live dashboard

## Goal

Replace the bare flag-driven `meshnet-node start` with a wizard-guided first-run experience modelled on GPU mining clients (like PhoenixMiner, lolMiner, etc.). After the wizard, the terminal switches to a live status dashboard showing real-time node health and earnings.

## Wizard flow (first run only)

```
╔══════════════════════════════════════════════════════════╗
║              meshnet-node  v0.1.0                        ║
║      Distributed AI Inference — Node Setup               ║
╚══════════════════════════════════════════════════════════╝

Detecting hardware...
  GPU 0: NVIDIA RTX 4090  24 GB VRAM  ✓
  GPU 1: NVIDIA RTX 3090  24 GB VRAM  ✓

Select a model to serve:

 #   Model                        Layers   NF4    INT8   BF16
 1   Llama-3-70B-Instruct         80       ✓18GB  ✓40GB  ✗80GB
 2   Qwen-2.5-72B-Instruct        80       ✓19GB  ✗41GB  ✗81GB
 3   Mixtral-8x7B-Instruct-v0.1   32       ✓ 7GB  ✓14GB  ✓27GB
 4   Phi-3-medium-128k-instruct   40       ✓ 4GB  ✓ 8GB  ✓15GB
 5   [Browse HuggingFace…]

Enter number [1]: _

Quantization [nf4/int8/bf16] (nf4 recommended for 24GB): _

Download directory [~/.meshnet/models]: _

Tracker URL [http://localhost:8080]: _

Wallet path [~/.config/meshnet/wallet.json] (new wallet will be created): _

Config saved to ~/.config/meshnet/config.json
Starting node…
```

Second run with existing config:

```
meshnet-node
Reading config from ~/.config/meshnet/config.json
Model: Llama-3-70B-Instruct  Quant: nf4  Shard: layers 0–15
Tracker: http://192.168.1.10:8080
Starting…
```

## Live dashboard (once running)

Renders every 2 seconds using `rich.live`. Fallback: plain-text status line if `rich` is unavailable or terminal is not a TTY (important for WSL2 / SSH).

```
meshnet-node  Llama-3-70B-Instruct [nf4]  shard 0–15/80  up 00:03:22

GPU 0  RTX 4090       GPU ████████░░  73%   VRAM 18.2/24.0 GB   45°C
GPU 1  RTX 3090       GPU ███░░░░░░░  28%   VRAM  8.7/24.0 GB   38°C

Tokens/sec   ▁▂▃▄▅▆▇█  42.3 t/s (EMA 30s)
Requests     1,247 served   3 active
Peers        8 connected   (tracker: ✓  relay: ✓)
TAI earned   0.00 TAI  (payments active after US-006)
Uptime       00:03:22

[q] quit   [r] reset stats   [c] compact view
```

Compact mode (`--compact` or pressing `c`) shows a single status line:
```
[43t/s  VRAM18.2GB  req1247  peers8  up3m22s]
```

## Implementation notes

### Hardware detection

```python
import torch

def detect_gpus() -> list[dict]:
    gpus = []
    if torch.cuda.is_available():
        for i in range(torch.cuda.device_count()):
            props = torch.cuda.get_device_properties(i)
            gpus.append({
                "index": i,
                "name": props.name,
                "vram_gb": props.total_memory / 1e9,
                "backend": "cuda"
            })
    # ROCm / Apple Silicon stubs for later
    return gpus
```

### Curated model list

`packages/node/meshnet_node/model_catalog.py` — a hardcoded list of `ModelPreset` dataclasses:

```python
@dataclass
class ModelPreset:
    name: str               # display name
    hf_repo: str            # HuggingFace repo ID
    num_layers: int
    vram_gb: dict           # {"nf4": 18, "int8": 40, "bf16": 80}
    description: str        # one-line description
```

Initial list (expand over time):
- `meta-llama/Meta-Llama-3-70B-Instruct` — 80L, NF4 18GB, INT8 40GB, BF16 80GB
- `Qwen/Qwen2.5-72B-Instruct` — 80L, NF4 19GB, INT8 41GB, BF16 81GB
- `mistralai/Mixtral-8x7B-Instruct-v0.1` — 32L, NF4 7GB, INT8 14GB, BF16 27GB
- `microsoft/Phi-3-medium-128k-instruct` — 40L, NF4 4GB, INT8 8GB, BF16 15GB
- `google/gemma-2-27b-it` — 46L, NF4 10GB, INT8 20GB, BF16 40GB

### HuggingFace Browse

```python
from huggingface_hub import list_models

def browse_hf(top_n=20) -> list[dict]:
    models = list_models(
        pipeline_tag="text-generation",
        library="transformers",
        sort="downloads",
        direction=-1,
        limit=top_n,
        cardData=True,
    )
    return [{"repo": m.modelId, "downloads": m.downloads} for m in models]
```

### Persistent config

`~/.config/meshnet/config.json`:
```json
{
  "model_hf_repo": "meta-llama/Meta-Llama-3-70B-Instruct",
  "quantization": "nf4",
  "download_dir": "~/.meshnet/models",
  "tracker_url": "http://192.168.1.10:8080",
  "wallet_path": "~/.config/meshnet/wallet.json",
  "shard_start": null,
  "shard_end": null,
  "updatedAt": "2026-06-29T..."
}
```

`shard_start`/`shard_end`: null means tracker auto-assigns. User can pin a range for dedicated partial-model nodes.

### CLI flags

All wizard answers are overridable without re-running the wizard:

```
meshnet-node [start]
  --model <hf-repo-id>            # e.g. meta-llama/Meta-Llama-3-70B-Instruct
  --quantization [bf16|int8|nf4]
  --download-dir <path>
  --tracker <url>
  --wallet <path>
  --shard-start <int>             # pin shard range (optional)
  --shard-end <int>
  --reset-config                  # ignore saved config, re-run wizard
  --no-tui                        # plain-text output (for CI / headless)
  --compact                       # single-line status instead of full dashboard

meshnet-node models                # list curated models and exit
meshnet-node models --browse       # list HF Hub top-20 and exit
meshnet-node config                # print current config and exit
```

### WSL2 / non-TTY fallback

```python
import sys, os

def is_interactive_tty() -> bool:
    return sys.stdout.isatty() and os.environ.get("TERM") not in ("dumb", "")

if not is_interactive_tty():
    # fall back to plain-text periodic status
    run_plain_status_loop(node)
else:
    run_rich_dashboard(node)
```

Do NOT use `termios`, `fcntl`, or `/dev/tty` — these break in Windows cmd.exe and some WSL2 terminal emulators.

## Acceptance criteria

- `meshnet-node` with no args and no config → wizard starts
- Wizard detects GPU and marks `[too large]` for models that exceed available VRAM
- `meshnet-node models` prints curated list and exits
- `meshnet-node models --browse` calls HF Hub API, prints top-20, exits
- Second run (config exists) → skips wizard, starts immediately
- `--reset-config` re-runs wizard even with config present
- All wizard inputs override-able via CLI flags
- Live rich dashboard renders and updates every 2s when running in a TTY
- Falls back to plain-text when not a TTY (CI / WSL2 without TERM set)
- Ctrl-C prints a clean summary line and exits 0
- `python -m pytest` passes from repo root
- Commit only this story's changes
