wandb-plot

name	wandb-plot
description	Download and generate plots from Weights & Biases runs. Use when you need to: - List projects you have access to - List runs in a W&B project - Inspect available metrics for a run - Download existing plot images from a run - Generate line plots from metric history (loss, accuracy, etc.)

W&B Plot Skill

MANDATORY Setup (Run First)

IMPORTANT: Before running ANY script, you MUST execute this setup block to ensure the correct working directory and virtual environment.

# Determine skill directory (Claude Code plugin or Codex/local)
if [ -n "${CLAUDE_PLUGIN_ROOT}" ]; then
  SKILL_DIR="${CLAUDE_PLUGIN_ROOT}/skills/wandb-plot"
elif [ -d "${HOME}/.codex/wandb-plot-skill/skills/wandb-plot" ]; then
  SKILL_DIR="${HOME}/.codex/wandb-plot-skill/skills/wandb-plot"
else
  SKILL_DIR="$(pwd)"
fi
cd "$SKILL_DIR"

# Create/activate venv and install deps (uv preferred, pip fallback)
if [ ! -d ".venv" ]; then
  if command -v uv &> /dev/null; then
    uv venv .venv && . .venv/bin/activate && uv pip install -e .
  else
    python3 -m venv .venv && . .venv/bin/activate && pip install -e .
  fi
else
  . .venv/bin/activate
fi

After setup completes, all python3 scripts/*.py commands will work correctly from this directory.

Prereqs

• Auth: set WANDB_API_KEY environment variable (recommended) or run wandb login.

Tools (Scripts)

scripts/list_projects.py

Inputs

• --entity <entity> (optional; defaults to current user or org)
• --limit <n> (optional, default: 100)
• --json (optional)

Output

• Stdout table (default) or JSON list (with --json), where each item includes:
  • name, entity, description, created_at, url

scripts/list_runs.py

Inputs

• <entity/project> (required)
• --state <state> (optional)
• --limit <n> (optional, default: 100)
• --json (optional)

Output

• Stdout table (default) or JSON list (with --json), where each item includes:
  • id, name, state, created_at, summary_metrics, tags

scripts/list_metrics.py

Inputs

• <entity/project> (required)
• <run_id> (required; run id or run name)
• --include-system (optional; include _step, _timestamp, etc.)
• --json (optional)

Output

• Stdout table (default) or JSON dict (with --json) keyed by metric name.
• Each metric entry includes type, count, non_null_count, and for numeric metrics: min, max, mean, std.

scripts/download_plots.py

Inputs

• <entity/project> (required)
• <run_id> (required)
• --pattern "<glob>" (optional; defaults to common image paths)
• --output <dir> (optional; overrides default output location)
• --force (optional; re-download if file exists)

Output

• Writes downloaded images to the output directory (flat filenames).
• Updates/creates metadata.json in the same directory.
• Stdout lists downloaded/skipped files; returns an empty list (and prints “No plot files found…”) when nothing matches.

scripts/generate_plots.py

Inputs

• <entity/project> (required)
• <run_id> (required; comma-separated for multiple runs)
• --metrics "<m1,m2,...>" (required; metric names as shown by list_metrics.py)
• --all-metrics (optional; plot all metrics)
• --full-res (optional; uses full scan_history)
• --smooth <n> (optional; rolling average window)
• --output <dir> (optional)
• --ema-weight <w> (optional; default: 0.99)
• --viewport-scale <n> (optional; default: 1000)
• --no-ema (optional; disable EMA smoothing)
• --group-by-prefix (optional; group outputs by metric prefix)
• --include-system (optional; include system metrics like _step and system/* with --all-metrics)

Output

• Writes <metric>.png for each generated plot plus metadata.json to the output directory.
• Stdout lists generated files; missing metrics raise an error listing available metrics.

Workflow

python3 scripts/list_projects.py --limit 10
python3 scripts/list_runs.py <entity/project> --limit 10
python3 scripts/list_metrics.py <entity/project> <run_id>
python3 scripts/download_plots.py <entity/project> <run_id>
python3 scripts/generate_plots.py <entity/project> <run_id> --metrics loss,accuracy
python3 scripts/generate_plots.py <entity/project> run1,run2 --metrics loss --ema-weight 0.99 --viewport-scale 1000
python3 scripts/generate_plots.py <entity/project> run1,run2 --metrics rewards/total_mean,rewards/total_std --output /path/to/folder --group-by-prefix
python3 scripts/generate_plots.py <entity/project> run1,run2 --all-metrics --output /path/to/folder --group-by-prefix

Outputs

Default output directory:

wandb_plots/<entity>_<project>/<run_name>_<run_id>/
  - *.png
  - metadata.json

If download_plots.py finds no images, fall back to generate_plots.py.