First iteration

One shot prompt using *Google Antigravity* with *Gemini 3 Pro (High)* model.

Prompt:

    # ZFS Dashboard

    Create a tool that parses the output of zfs commands (zfs and zpool) and shows a dashboard with the most important information.

    The documentation for the tools can be found executing the following commands:

    * man zfs list
    * man zpool list
    * man zpool status
    * man zpool iostat

    ## Features

    ### Pool Selection

    * a tab to select the pool
    * the tab is only visible if the system has more than one pool
    * it should have the `all` option with aggregated information from all pools

    ### Pool Information

    * the pool information should be updated on application start, when a pool is selected and when F5 is pressed
    * the state of the pool
    * the state of each vdev
    * a list of datasets
      * datasets are show grouped by parents in a tree view
      * the tree view should be collapsible
      * if a dataset has more than 10 children, it should be collapsed by default
      * the thee view is scrollable
      * the tree view should be searchable
      * the tree view should be sorted by name
      * the tree view should show the following columns:
        * name
        * size/quota
        * used
        * available
        * compression
        * mountpoint
      * when a dataset is selected, it should show the following snapshot information:
        * name
        * size

    This information will be retrieved from the commands `zfs list` and `zpool status`.

    ### Realtime Monitoring

    * the monitoring should be updated every 5 seconds (configurable using command line arguments) and when F5 is pressed
    * size/used/available pool and vdev information
      * displayed as a progress bar, for the pool and each vdev.
    * IO and latency information
      * displayed as a graph, for the pool and each vdev

    This information should be retrieved from the commands `zpool iostat`.

    ## Arguments

    * -h/--help: show usage
    * -i/--interval (interval in seconds): change update interval in seconds
    * -p/--pool (pool name): only show this pool
    * -d/--dataset (dataset regex): a regex filter to dataset list

    ## Technology

    The application will be a TUI (Text User Interface) application.

    * in Python, use uv package manager
    * use [Textual](https://github.com/textualize/textual) for a beautiful TUI.

Author: sergiogarciadev

.gitignore

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+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv

.python-version

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+3.13

README.md

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+def main():
+    print("Hello from zfs-dashboard-python!")
+
+
+if __name__ == "__main__":
+    main()

main.py

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+[project]
+name = "zfs-dashboard-python"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.13"
+dependencies = [
+    "textual>=6.6.0",
+]

pyproject.toml

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+import argparse
+import sys
+from .ui.app import ZfsDashboardApp
+
+def main():
+    parser = argparse.ArgumentParser(description="ZFS Dashboard TUI")
+    parser.add_argument("-i", "--interval", type=int, default=5, help="Update interval in seconds")
+    parser.add_argument("-p", "--pool", type=str, help="Only show this pool")
+    # Dataset regex filter not fully implemented in UI yet, but we can add the arg
+    parser.add_argument("-d", "--dataset", type=str, help="Regex filter for dataset list")
+    
+    args = parser.parse_args()
+    
+    app = ZfsDashboardApp(
+        interval=args.interval,
+        pool_filter=args.pool,
+        dataset_filter=args.dataset
+    )
+    app.run()
+
+if __name__ == "__main__":
+    main()

src/zfs_dashboard/__init__.py

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+from dataclasses import dataclass, field
+from typing import List, Optional
+
+@dataclass
+class Snapshot:
+    name: str
+    used: str
+
+@dataclass
+class Dataset:
+    name: str
+    used: str
+    avail: str
+    refer: str
+    mountpoint: str
+    compression: str = "off"
+    children: List['Dataset'] = field(default_factory=list)
+    snapshots: List[Snapshot] = field(default_factory=list)
+
+@dataclass
+class Vdev:
+    name: str
+    state: str
+    read: int = 0
+    write: int = 0
+    cksum: int = 0
+    # IO Stats
+    read_ops: int = 0
+    write_ops: int = 0
+    read_bytes: int = 0
+    write_bytes: int = 0
+    type: str = "disk" # mirror, raidz, disk, etc.
+    size: str = ""
+    alloc: str = ""
+    free: str = ""
+    frag: str = ""
+    cap: str = ""
+
+@dataclass
+class Pool:
+    name: str
+    state: str
+    size: str
+    alloc: str
+    free: str
+    frag: str
+    cap: str
+    health: str
+    altroot: str = "-"
+    # IO Stats
+    read_ops: int = 0
+    write_ops: int = 0
+    read_bytes: int = 0
+    write_bytes: int = 0
+    vdevs: List[Vdev] = field(default_factory=list)
+    datasets: List[Dataset] = field(default_factory=list)

src/zfs_dashboard/main.py

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+from textual.app import App
+from textual.binding import Binding
+
+from ..zfs import get_system_status
+from .screens import DashboardScreen
+
+class ZfsDashboardApp(App):
+    CSS = """
+    .left-pane {
+        width: 50%;
+        height: 100%;
+        border-right: solid green;
+    }
+    .right-pane {
+        width: 50%;
+        height: 100%;
+    }
+    PoolOverview {
+        height: auto;
+        border-bottom: solid blue;
+        padding: 1;
+    }
+    VdevList {
+        height: 1fr;
+    }
+    DatasetTreeWidget {
+        height: 60%;
+        border-bottom: solid blue;
+    }
+    DatasetDetails {
+        height: 40%;
+    }
+    .header {
+        text-align: center;
+        background: $accent;
+        color: $text;
+        width: 100%;
+    }
+    """
+
+    BINDINGS = [
+        Binding("f5", "refresh_data", "Refresh"),
+        Binding("q", "quit", "Quit"),
+    ]
+
+    def __init__(self, interval: int = 5, pool_filter: str = None, dataset_filter: str = None):
+        super().__init__()
+        self.interval = interval
+        self.pool_filter = pool_filter
+        self.dataset_filter = dataset_filter
+        self.pools = []
+
+    def on_mount(self):
+        self.action_refresh_data()
+        self.set_interval(self.interval, self.action_refresh_data)
+
+    def action_refresh_data(self):
+        all_pools = get_system_status()
+        
+        # Apply pool filter
+        if self.pool_filter:
+            self.pools = [p for p in all_pools if p.name == self.pool_filter]
+        else:
+            self.pools = all_pools
+            
+        # Apply dataset filter (regex)
+        # We need to filter datasets within pools.
+        # Since datasets are a tree, if a child matches, we might need to keep parents.
+        # Or just filter the list?
+        # The requirement says "regex filter to dataset list".
+        # I'll pass this filter to the UI widgets or filter here.
+        # Filtering here is cleaner for the model.
+        
+        if self.dataset_filter:
+            import re
+            try:
+                pattern = re.compile(self.dataset_filter)
+                for pool in self.pools:
+                    # Filter datasets. This is tricky with tree structure.
+                    # If we filter the flat list, we might break the tree if we rebuild it.
+                    # But `pool.datasets` currently contains ROOTS of the tree.
+                    # If I filter roots, I might lose children.
+                    # Actually `pool.datasets` in `models.py` are roots?
+                    # In `zfs.py`: `pool.datasets = [ds for ds in root_datasets if ds.name == pool.name]`
+                    # Yes, usually just the root dataset.
+                    
+                    # So I need to traverse the tree and filter.
+                    # Or I can pass the filter to the widget.
+                    # Passing to widget is better because it can handle "match or has matching child" logic which I already implemented for search.
+                    pass 
+            except re.error:
+                pass
+        
+        # If screen is not mounted, mount it
+        if not self.screen or not isinstance(self.screen, DashboardScreen):
+            screen = DashboardScreen(self.pools)
+            if self.dataset_filter:
+                screen.dataset_filter = self.dataset_filter
+            self.push_screen(screen)
+        else:
+            # Update existing screen
+            screen = self.screen
+            screen.pools = self.pools
+            if self.dataset_filter:
+                screen.dataset_filter = self.dataset_filter
+                
+            if len(self.pools) > 1:
+                screen.update_all_tab()
+            for pool in self.pools:
+                screen.update_pool_data(pool)