eval

eval is a skill for Claude Code from ai-analyst-lab/ai-analyst. It costs 45 tokens per session (509 once invoked), scanned A, original, MIT.

An evaluation runner for testing a named AI analyst configuration against a fixed set of cases. An evaluation is a repeatable check of how well a system handles known tasks.

In plain words
What is it for?
Use it to run working, held-out, capability, or regression tests, compare system changes, inspect accuracy, and report passes, failures, blocks, and errors.
Why use it?
It makes changes easier to compare and keeps trial outputs, test conditions, and result types separate and recorded.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to run working, held-out, capability, or regression tests, compare system changes, inspect accuracy, and report passes, failures, blocks, and errors.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ai-analyst-lab/ai-analyst/eval
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add ai-analyst-lab/ai-analyst --skill eval
Clone the repo
git clone --depth 1 https://github.com/ai-analyst-lab/ai-analyst

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for eval

README.md
[![agentmods](https://agentmods.dev/badge/skills/ai-analyst-lab/ai-analyst/eval/github.svg)](https://agentmods.dev/skills/ai-analyst-lab/ai-analyst/eval)
Your own site
<a href="https://agentmods.dev/skills/ai-analyst-lab/ai-analyst/eval"><img src="https://agentmods.dev/badge/skills/ai-analyst-lab/ai-analyst/eval/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for eval

Your own site · 80×15
<a href="https://agentmods.dev/skills/ai-analyst-lab/ai-analyst/eval"><img src="https://agentmods.dev/badge/skills/ai-analyst-lab/ai-analyst/eval.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 509 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00045 $0.00509
Opus 5 $0.00023 $0.00254
Sonnet 5 $0.00009 $0.00102
Haiku 4.5 $0.00005 $0.00051

Measured 2d ago against content hash c9fc9f395aab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-13, from the pricing page.

Security

Grade A, and why

eval scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/eval/SKILL.md · 41 lines

How it starts

The opening of the file, as written. The whole thing — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Evaluate the system

Before running

Name the exact system under test. Record its model, instructions, skills, agents, helpers, knowledge, workflow, tools, connector configuration, and data snapshot.

Use one of these modes honestly:

  • Working mode supports iteration. Its references may be visible to the evaluator, but never to the child trial before its output is locked.
  • Course heldout mode sends locked outputs to the course-controlled grader. The expected results do not live in the student clone.
  • A local visible answer file is development material. Do not call it a secret heldout evaluation.

Run

  1. Load the question-only manifest from data/evals/public/.
  2. Select the split and any named slice before the run starts.
  3. Use helpers.evals.controller.EvaluationController to launch and record the trials.
  4. Give each trial only its public task, permitted system files, permitted data, and permitted tools.
  5. Lock every trial output before grading begins.
  6. Grade deterministic criteria first. Keep model-based grades separate.
  7. Preserve pass, fail, blocked, error, invalid, and unknown as different results.
  8. Report every case and slice before discussing the aggregate.

The local controller is available through python3 -m helpers.evals.cli run-suite. Use --model claude-opus-4-6. General code access is not required for routing or contract cases. When local data analysis requires --allow-code, state that local process isolation is not the same as course-heldout answer isolation.

For a reviewed working suite with local references, lock the trial outputs first, then grade them with python3 -m helpers.evals.cli grade-suite. Pass the run ID, public manifest, and reviewed reference file. Never copy the reference file into the trial workspace.

Compare a change

Hold the suite, data snapshot, model, evaluator, tools, and trial count fixed. Name one intended system change. If more than one material input changed, label the comparison confounded rather than attributing the score movement.

Read the full file on GitHub · 41 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 41 lines · 45 tokens per session scan A c9fc9f395aab

Subscribe to this mod's changes

eval is a skill published in the GitHub repository ai-analyst-lab/ai-analyst (298 stars, last pushed 3d ago), licensed MIT. It adds 45 tokens to every session and 509 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-12.

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