LEET terminal UI

Explore and compare local W&B runs from the terminal with the LEET (Lightweight Experiment Exploration Tool) TUI.

W&B LEET (Lightweight Experiment Exploration Tool) is a keyboard-driven terminal UI for exploring runs logged on the machine where you work. Use LEET to compare metrics, inspect system utilization, browse logged images, and tail console output without opening a browser. LEET reads local .wandb transaction logs, so you can inspect runs before they sync to the cloud.

When to use LEET

LEET is built for engineers who spend most of their time in a terminal, especially on remote machines, clusters, or SSH sessions where a graphical browser is slow or unavailable.

Surface	Best for
LEET	Local run folders on the machine that logged them; fast keyboard navigation; live monitoring while a job is still writing logs; SSH and tmux workflows.
W&B App	Full project workspaces, team collaboration, reports, sweeps, artifacts, and rich panel types across synced cloud runs.
W&B mobile app	Lightweight monitoring and alerts for synced cloud projects on a phone (Multi-tenant Cloud only).

LEET and the W&B App show the same underlying run data when that data exists locally and has been synced. LEET does not replace a project workspace in the browser. It is a different interface over local run files and live updates from an active training process.

Prerequisites

Install or upgrade the W&B CLI. LEET requires wandb-core and ships with the CLI package.

pip install --upgrade wandb

LEET was introduced in W&B CLI 0.23.0. Multi-run workspaces, the config editor, SYMON, media panes, and unified pane navigation require newer releases. For the features described on this page, use CLI 0.26.0 or later.

Verify that wandb-core is available:

wandb beta leet --help

If the command fails with a core availability error, reinstall or upgrade wandb so the bundled core binary is present.

wandb beta leet is a beta command. Its flags, shortcuts, and behavior may change between releases. The SDK team plans to graduate LEET out of wandb beta; watch SDK release notes for updates.

Launch LEET

From the directory that contains your wandb/ folder, open the default workspace for the latest local run:

wandb beta leet

You can also pass a workspace directory, a specific run directory, or a .wandb file:

wandb beta leet ./wandb
wandb beta leet ./wandb/offline-run-20260403_145048-6ao9fhns
wandb beta leet ./wandb/offline-run-20260403_145048-6ao9fhns/run-6ao9fhns.wandb

wandb beta leet run accepts the same optional PATH argument and launches the same TUI.

Open the standalone system monitor (SYMON) when you need host metrics without a run context:

wandb beta leet symon --interval 2s

For command syntax and subcommands, see wandb beta leet in the CLI reference.

Views and pane layout

LEET has three main views: workspace, single-run, and SYMON.

Workspace view

Workspace view is the default. It is designed to compare multiple runs from the same local wandb/ directory.

Typical panes include:

• Runs sidebar — browse and filter local run folders.
• Metrics grid — overlay selected runs on the same scalar charts.
• System metrics — charts for the highlighted run.
• Media — wandb.Image thumbnails rendered in the terminal.
• Console logs — assembled stdout and stderr for the highlighted run.
• Run overview — state, IDs, tags, notes, config, and summary values.

Use space to select or deselect a run for overlaid metrics. Use p to pin a run so its series stays on top in metric charts. Press enter on the highlighted run to open single-run view. Live runs keep updating in the workspace, so you can use LEET for both post-run analysis and monitoring an active job.

Single-run view

Single-run view focuses on one run with a metrics grid in the center, run overview on the left, and system metrics on the right. Media and console log panes open below the metrics grid when toggled on.

Press esc to return to workspace view.

SYMON

SYMON watches local CPU, memory, disk, network, and accelerator metrics while another process runs. It uses the same chart engine as run-backed system metrics panes but is not tied to a W&B run file.

Key features

Multi-run comparison

Select multiple runs in workspace view to compare scalar metrics on shared charts. Each run gets a stable color, and LEET reduces base color collisions so overlaid series stay distinguishable. Pinning is useful when many runs are selected and you want one series to render above the rest.

Press f to filter the runs list by name, project, tags, notes, config values, and other metadata. See the wandb beta leet reference for the full query syntax.

Metrics and system metrics

LEET renders scalar metrics as terminal line charts. Filter run metrics with / and system metrics with \. Press y on a focused chart to cycle modes such as log-scale Y or bucketed heatmap views for percentage-based system metrics.

Use the mouse wheel to zoom the focused chart. On live system metric charts, LEET defaults to a rolling tail window (10 minutes by default). Right-click and drag on a chart to inspect the nearest point. Hold alt while dragging to inspect all visible charts at the same X position.

Media and console logs

The media pane shows wandb.Image series as ANSI thumbnails. Toggle it with 3 in workspace or single-run view.

Toggle console logs with 4. LEET rebuilds readable log lines from raw terminal output, including ANSI escape codes and carriage-return progress lines.

For console log behavior in the W&B App, see Console logs.

Configuration

Persist layout, colors, default panes, and startup mode with the config editor:

wandb beta leet config

LEET writes wandb-leet.json under ~/.config/wandb/ by default, or under WANDB_CONFIG_DIR when that variable is set. You can also resize grids from inside LEET with c and r.

See the CLI reference for common config keys and color scheme names.

Navigate with the keyboard

LEET is designed for keyboard and mouse input. Press h or ? inside LEET to open the in-app help overlay for the current view.

Across workspace and single-run views:

• tab and shift+tab cycle focus between visible panes.
• w, a, s, d and the arrow keys move within the focused pane (except in the media pane, where arrows scrub the X-axis and WASD moves between tiles).
• home, end, pgup, and pgdown jump within lists, chart pages, or media frames.
• 1, 2, 3, and 4 toggle the metrics grid, system metrics, media, and console logs panes.
• [ and ] toggle sidebars (runs list, run overview, or system metrics depending on the view).

For the full shortcut tables for workspace, single-run, SYMON, and mouse actions, see Keyboard shortcuts (LEET tab) and wandb beta leet.

Limitations compared to the W&B App

LEET complements the W&B App but does not replicate every workspace capability.

Capability	LEET	W&B App
Data source	Local wandb/ directories and .wandb files on the current machine	Synced cloud projects and teams
Run comparison	Multiple local runs in one directory	Full workspace tables, grouping, and saved views
Panel types	Scalar line charts, system metrics, wandb.Image media, console logs	Line, bar, scatter, parallel coordinates, media, code, query panels, custom charts, and more
Collaboration	Single-user terminal session	Sharing, comments, reports, and team features
Artifacts and files	Not available	Artifacts, Files, and Code tabs per run
Sweeps and registry	Not available	Sweep dashboards, registry, and automations

If you need artifacts, sweep analysis, or panel types that LEET does not provide, open the run in the W&B App after syncing.

Related resources

• View a specific run — open runs in the W&B App or LEET.
• Keyboard shortcuts — LEET and App shortcut reference.
• wandb beta leet — launch syntax, filtering, configuration keys, and changelog.
• SDK release notes — LEET feature history by CLI version.