wandb-eval-tables

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Convert W&B Table artifacts into non-destructive EvalTable previews with scan-first planning, typed input/output/score columns, bounded batches, verification, and safe removal. Use when a coding agent needs to create, inspect, compare, verify, or remove W&B EvalTable previews.

2installs

Sourcewandb/skills

Added on2026-08-13

NPX Install

npx skill4agent add wandb/skills wandb-eval-tables

SKILL.md Content

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W&B EvalTable previews

Use the bundled helper to preview existing

wandb.Table

data as

wandb.EvalTable

data. A preview creates new runs and keys; it never overwrites the source runs or tables.

Read

references/EVAL_TABLES.md

before converting. It is the canonical source for EvalTable semantics, source selection, limits, column roles, verification, and removal.

Environment

Run the helper from an environment that provides a W&B SDK with

wandb.EvalTable

and Weave. Use

uv

to supply missing dependencies:

bash

uv run --with 'wandb[workspaces]>=0.28.1' --with weave \
  python skills/wandb-eval-tables/scripts/table_artifact_to_eval_table.py --help

Credentials and default scope may come from

WANDB_API_KEY

,

WANDB_ENTITY

, and

WANDB_PROJECT

; otherwise pass explicit entity/project arguments. Downloads use the operating system's temporary directory, not a fixed current working directory.

Required workflow

Choose the narrowest source that matches the request: exact artifact, one run, one sweep, or a project/workspace. Do not broaden an explicitly named source.
Run
```
scan
```
. This is read-only preflight and is not proof of conversion.
Review
```
eligible_summary_by_table_key
```
, table shapes, truncations, warnings, and existing-preview metadata. Select one table key unless the user asks for a broader batch.
Classify columns only when confident. Input tuples must uniquely identify rows; score columns must be numeric or boolean; free-text labels and rationales are outputs. Leave ambiguous tables untyped.
Run
```
preview
```
for exactly one
```
--table-key
```
per invocation. Keep the target in the source project unless the user requests another writable project.
If runs were created, run
```
verify-preview
```
on the final created run and the exact logged key. Report success only when it returns
```
verified: true
```
.
Report created and skipped sources plus every truncation or failed check.