scaffold-agentic-evals

scaffold-agentic-evals is a skill for Claude Code, Codex from jwilger/ai-plugins. It costs 50 tokens per session (622 once invoked), scanned A, original, no licence file.

A setup for a project-local evaluation system for prompts, AI agents, retrieval-augmented generation (RAG), judges, tools, or other language-model behaviour. It is intended to keep evaluation files and results in the repository, with promptfoo as the default open-source option.

In plain words
What is it for?
Creating an evaluation harness for prompts, agents, RAG pipelines, judging systems, tool use, and other language-model features.
Why use it?
It creates a repeatable place to test AI behaviour instead of relying on a single successful response. Keeping the evaluation setup in the project makes it available to the team and version history.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

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.

agentmods
npx agentmods add skills/jwilger/ai-plugins/scaffold-agentic-evals
Any agent
npx skills add jwilger/ai-plugins --skill scaffold-agentic-evals
Clone the repo
git clone --depth 1 https://github.com/jwilger/ai-plugins

Made for: Claude Code, Codex.

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 scaffold-agentic-evals

README.md
[![agentmods](https://agentmods.dev/badge/skills/jwilger/ai-plugins/scaffold-agentic-evals.svg)](https://agentmods.dev/skills/jwilger/ai-plugins/scaffold-agentic-evals)
Your own site
<a href="https://agentmods.dev/skills/jwilger/ai-plugins/scaffold-agentic-evals"><img src="https://agentmods.dev/badge/skills/jwilger/ai-plugins/scaffold-agentic-evals.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 622 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00050 $0.00622
Opus 5 $0.00025 $0.00311
Sonnet 5 $0.00010 $0.00124
Haiku 4.5 $0.00005 $0.00062

Measured 3d ago against content hash 5354272d86ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

scaffold-agentic-evals 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 3d 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.

plugins/development-system/components/agentic-systems-engineering/skills/scaffold-agentic-evals/SKILL.md · 57 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago Changed · -1 lines 5354272d86ad
  2. 6d ago First seen · 58 lines · 50 tokens per session scan A 6fba92f45ac2

Subscribe to this mod's changes

scaffold-agentic-evals is a skill published in the GitHub repository jwilger/ai-plugins (4 stars, last pushed 3d ago), with no licence file. It adds 50 tokens to every session and 622 once invoked, about $0.0003 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 2026-08-31.

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