LEET terminal UI

W&B LEET (Lightweight Experiment Exploration Tool) is a keyboard-driven terminal UI for exploring W&B runs. Use LEET to compare local 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. You can also open a remote run by URL to view its scalar history and summary.

W&B LEET workspace view with runs, metrics, system metrics, media, console logs, and run overview panes.

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 (Available for Multi-tenant Cloud, in preview for Dedicated Cloud).

LEET and W&B show the same underlying run data when that data exists locally and has been synced. LEET supports local run files, live updates from an active training process, and limited remote-run exploration.

Prerequisites

Install or upgrade the W&B CLI to the latest release using pip or uv:

pip install --upgrade wandb

uv pip install --upgrade wandb

This guide describes the latest CLI behavior.

In SDK v0.27.x and earlier, launch the LEET TUI with wandb beta leet instead of wandb leet.

Launch LEET

From the directory that contains your wandb/ folder, open the default workspace and auto-select the latest local run:

wandb leet

You can pass an optional PATH that points to a workspace directory, a specific run directory, or a .wandb file:

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

Open the standalone system monitor (SYMON) to view host metrics without a run context:

wandb leet symon --interval 2s

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

Remote runs

To view a synced run, pass its URL. Replace [ENTITY], [PROJECT], and [RUN-ID] with the values from your run URL:

wandb leet "https://wandb.ai/[ENTITY]/[PROJECT]/runs/[RUN-ID]"

Remote runs require a network connection and API key authentication for the server that hosts the run. LEET uses your configured credentials or prompts you to log in. Remote mode opens one run’s scalar history and summary. It doesn’t provide live updates, multi-run comparison, config, system metrics, media, console logs, custom X-axes, or the record inspector. Use local run files for those features.

Views and pane layout

LEET has three main views: workspace, single-run, and SYMON. The record inspector provides a separate view of a local transaction log.

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. Selected runs have a filled icon. 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. Live runs have animated markers in the runs list and a pulsing state indicator in the status bar. LEET marks a live local run as crashed after 10 minutes without transaction-log updates. If writes resume, LEET resumes live monitoring. In narrow terminals, LEET temporarily hides the run overview sidebar, then the runs sidebar, to leave at least 24 columns for charts when possible. The sidebars return when the terminal has enough space.

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 leave the active filter or fullscreen media view, then clear pane focus. For a local run, press esc again with no pane focused to return to workspace view.

SYMON

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

W&B LEET system metrics view with GPU charts and bucketed heatmap mode.

Record inspector

Use the record inspector to examine the raw records in a local .wandb transaction log. In single-run view, press i to open it for the current run. You can also launch it directly:

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

The optional path accepts a .wandb file, a run directory, or a workspace directory. With no path or a workspace directory, LEET opens the latest run. The record list shows record types and summaries alongside the selected record’s full text. Press / to filter by type or summary, tab to switch between regex and glob modes while editing, and ctrl+/ to clear the filter. With the record list focused, press end to follow new records from a live run. If you opened the inspector with i, press esc from the record list to return to the run. When stdout is piped or redirected, the command prints the available records as Protocol Buffer text and exits:

wandb leet inspect | less
wandb leet inspect > records.txt

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. Bare terms search across run key, display name, run ID, project, tags, and notes. The filter also supports fielded queries:

Query	Matches
`project:vision`	Project name.
`name:baseline`	Display name. Aliases: `run_name`, `display`, `display_name`.
`id:abc123`	Run ID. Alias: `run_id`.
`key:offline-run`	Run directory key. Aliases: `run_key`, `path`.
`tag:prod`	Tags. Alias: `tags`.
`note:debug`	Notes. Alias: `notes`.
`config:adamw` or `cfg:adamw`	Any flattened config key or value.
`cfg.lr>=1e-3`	A specific nested config path. `config.lr` also works.
`has:notes` or `exists:cfg.dataset`	Existence check.

Supported operators are :, =, !=, >, >=, <, and <=. Numeric comparisons are useful for config values such as learning rate, batch size, or number of layers. Use whitespace or AND for conjunction, OR or | for alternatives, and -, !, or NOT for negation. Use quotes for phrases with spaces.

transformer
project:vision tag:baseline
cfg.lr>=1e-3 cfg.optimizer=adamw
has:notes -tag:debug
project:vision tag:baseline cfg.lr>=1e-3 -note:debug | project:nlp

While editing a filter, press tab to switch between regex and glob modes. Regex mode behaves like a case-insensitive substring search unless the query contains regex metacharacters. Glob mode supports * for any sequence and ? for any single character. LEET saves run, metric, and system metric filters, including their match modes, in .wandb-leet.json inside each local wandb/ directory. It restores them when you reopen that directory in workspace or single-run view. Clearing a filter also clears its saved value. Console log and run overview filters aren’t saved between sessions.

Metrics and system metrics

LEET renders scalar metrics as terminal line charts. Filter run metrics with / and system metrics with \. When the console logs pane has focus, / filters logs instead. Press y on a focused chart to cycle modes such as log-scale Y or bucketed heatmap views for percentage-based system metrics. Press g to cycle chart guides between off, a dotted background, and horizontal lines aligned with Y-axis ticks. This setting applies across workspace, single-run, and SYMON views and is saved between sessions. By default, LEET plots each metric against W&B’s internal step metric (_step). For local runs, a custom X-axis defined with run.define_metric() takes precedence, including definitions that use glob patterns. For example, this run plots train/loss against train/step:

import wandb

with wandb.init(project="leet-example", mode="offline") as run:
    run.define_metric("train/*", step_metric="train/step")
    for step in range(10):
        run.log({"train/step": step * 100, "train/loss": 1 / (step + 1)})

The chart header and status bar show [x: train/step]. Rows without a finite value for the custom X-axis are omitted. Each chart uses one X-axis, so compare runs with the same axis definition. A custom axis replaces the default step axis, and series using a different axis aren’t plotted on that chart. 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 visible charts in the same grid at the same X position. Metric charts synchronize only when they share the same X-axis.

Media and console logs

The media pane shows wandb.Image series, including lists of images logged under one key, with one tile per image. Toggle it with 3 in workspace or single-run view. With the media pane focused, use w, a, s, and d to select tiles. The left and right arrows move one frame, and the up and down arrows move 10 frames. Press enter for fullscreen media and esc to leave it. Press l to link scrubbing across image series so the arrows, home, and end move a shared cursor along their combined step timeline. Press k to switch between ANSI thumbnails and high-resolution rendering in terminals that support the Kitty graphics protocol. LEET falls back to ANSI when the terminal doesn’t support high-resolution rendering. Image padding uses the terminal background.

W&B LEET workspace view with the media pane showing several image series.

Toggle console logs with 4. LEET rebuilds readable log lines from raw terminal output, including ANSI escape codes and carriage-return progress lines. To filter console output, focus the logs pane, press /, and type a pattern. Press tab while editing to switch between regex and glob matching. Press enter to apply the filter or esc to discard the draft query. LEET displays matching lines and follows new matches when you’re at the end of the log. With the logs pane focused, press ctrl+/ or ctrl+l to clear the filter. 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 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. Drag pane borders and separator lines to resize sidebars, stacked panes, and the Environment, Config, and Summary sections of the run overview. The active border is highlighted while you drag. LEET saves the proportions separately for workspace, single-run, and inspector views. Press 0 to reset sizes for the current view, including the run overview sections. In the config editor, the field list scrolls with your selection to fit short terminals. Press space to toggle a boolean setting.

W&B LEET config editor showing grid settings, color schemes, visibility settings, and palette selection.

Common config keys

Key	Default	Description
`startup_mode`	`workspace_latest`	Initial view when launched without a run path.
`chart_guides`	`off`	Line chart guides: `off`, `dots`, or `horizontal`. Cycle with `g`.
`metrics_grid.rows`, `metrics_grid.cols`	`4`, `3`	Single-run metrics grid size.
`system_grid.rows`, `system_grid.cols`	`6`, `2`	Single-run system metrics sidebar grid size.
`media_grid.rows`, `media_grid.cols`	`1`, `2`	Single-run media grid size.
`workspace_metrics_grid.rows`, `workspace_metrics_grid.cols`	`3`, `3`	Workspace metrics grid size.
`workspace_system_grid.rows`, `workspace_system_grid.cols`	`3`, `3`	Workspace system metrics grid size.
`workspace_media_grid.rows`, `workspace_media_grid.cols`	`1`, `2`	Workspace media grid size.
`symon_grid.rows`, `symon_grid.cols`	`3`, `3`	SYMON grid size.
`color_scheme`	`wandb-vibe-10`	Palette for workspace run metrics and run list colors.
`per_plot_color_scheme`	`sunset-glow`	Palette for single-run charts when `single_run_color_mode` is `per_plot`.
`tag_color_scheme`	`wandb-vibe-10`	Palette for tag badges in the overview sidebar.
`system_color_scheme`	`wandb-vibe-10`	Palette for system metric charts.
`french_fries_color_scheme`	`viridis`	Palette for bucketed heatmap charts.
`single_run_color_mode`	`per_series`	Color single-run charts per series or per plot.
`system_color_mode`	`per_series`	Color system charts per series or per plot.
`system_tail_window_minutes`	`10`	Default live tail window for system charts.
`heartbeat_interval_seconds`	`15`	Polling heartbeat for live runs.
`workspace_overview_visible`	`true`	Show the workspace run overview sidebar by default.
`workspace_metrics_grid_visible`	`true`	Show the workspace metrics grid by default.
`workspace_system_metrics_visible`	`false`	Show the workspace system metrics pane by default.
`workspace_console_logs_visible`	`false`	Show the workspace console logs pane by default.
`workspace_media_visible`	`false`	Show the workspace media pane by default.
`left_sidebar_visible`	`true`	Show the single-run overview sidebar by default.
`right_sidebar_visible`	`true`	Show the single-run system metrics sidebar by default.
`metrics_grid_visible`	`true`	Show the single-run metrics grid by default.
`console_logs_visible`	`false`	Show the single-run console logs pane by default.
`media_visible`	`false`	Show the single-run media pane by default.

Several color schemes are available, like wandb-vibe-10, wandb-vibe-20, sunset-glow, blush-tide, gilded-lagoon, bootstrap-vibe, dusk-shore, clear-signal, traffic-light, viridis, plasma, inferno, magma, and cividis.

Palettes dusk-shore and clear-signal are colorblind-friendly.
Sequential palettes such as viridis, plasma, inferno, magma, cividis, and traffic-light work well for bucketed heatmaps.

Diagnostics and telemetry

LEET prints startup failures to stderr. To collect debug logs, launch it with WANDB_DEBUG=true:

WANDB_DEBUG=true wandb leet

Debug output is written to wandb-leet.debug.log beside the global wandb-leet.json config file. LEET doesn’t send usage telemetry when WANDB_MODE=offline, WANDB_MODE=disabled, or WANDB_ERROR_REPORTING=false.

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, media, record inspector, and mouse actions, see Keyboard shortcuts (LEET tab).

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, or a remote run’s scalar history and summary by URL	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.

Changelog

LEET was initially launched in beta in SDK v0.23.0, and graduated to GA in SDK v0.28.0. For details, refer to the SDK release notes.

View a specific run in the W&B App or LEET.
Keyboard shortcuts for the W&B App and LEET.
wandb leet command reference.
SDK release notes, including LEET changes.

Guides

Integrations

Reference

When to use LEET

Prerequisites

Launch LEET

Remote runs

Views and pane layout

Workspace view

Single-run view

SYMON

Record inspector

Key features

Multi-run comparison

Metrics and system metrics

Media and console logs

Configuration

Common config keys

Diagnostics and telemetry

Navigate with the keyboard

Limitations compared to the W&B App

Changelog

​When to use LEET

​Prerequisites

​Launch LEET

​Remote runs

​Views and pane layout

​Workspace view

​Single-run view

​SYMON

​Record inspector

​Key features

​Multi-run comparison

​Metrics and system metrics

​Media and console logs

​Configuration

​Common config keys

​Diagnostics and telemetry

​Navigate with the keyboard

​Limitations compared to the W&B App

​Changelog

​Related resources

When to use LEET

Prerequisites

Launch LEET

Remote runs

Views and pane layout

Workspace view

Single-run view

SYMON

Record inspector

Key features

Multi-run comparison

Metrics and system metrics

Media and console logs

Configuration

Common config keys

Diagnostics and telemetry

Navigate with the keyboard

Limitations compared to the W&B App

Changelog

Related resources