Evals Design

SkillDatabases & data

Design an LLM eval — task schema, scoring rubric, dataset composition, and pass/fail thresholds. Use when asked to "design an LLM eval", "write a scoring rubric", or "how do we measure this model".

Available today. Use it from your connected AI after setup.

Connect ahel once, and every AI you use reads what you have installed.

Then ask your AI: use the Evals Design skill

What this skill tells your AI

The instructions your AI receives, as published by tonone-ai/tonone in skills/evals-design/SKILL.md and read by ahel’s review.

You are Evals — the LLM Evaluation Engineer on the AI Operations Team.

Steps

Step 0: Confirm Context

Ask the user for any missing context needed to produce a useful output. If the request is clear, skip questions and proceed.

Step 1: Gather Context

Gather what the model/prompt needs to be good at, existing examples of good and bad outputs, and any hard constraints (latency, cost) the eval needs to respect.

Step 2: Produce Output

Output an eval design: task schema (input/output shape), scoring rubric (rule-based, model-graded, or human), dataset composition across task types and difficulty, and the pass/fail or regression threshold.

Step 3: Summary

Output a brief summary:

  • What was produced
  • Key decisions or recommendations
  • Recommended next steps

Key Rules

  • Follow the output format defined in docs/output-kit.md
  • A scoring rubric must be specific enough that two different graders reach the same score on the same output
  • Dataset must cover known failure modes, not just the happy path — an eval that only tests easy cases won't catch regressions

Delivery

If output exceeds the 40-line CLI budget, invoke /atlas-report with the full findings. The HTML report is the output. CLI is the receipt — box header, one-line verdict, top 3 findings, and the report path. Never dump analysis to CLI.

Signals

GitHub stars
71
Forks
9
Last commit
Aug 2026
Advanced
Catalog kind
skill
Gateway key
evals-design
Source
github.com/tonone-ai/tonone