eval

eval is a skill for Claude Code, Codex from TimothyHan/qa-buddy-skills. It costs 130 tokens per session (2,073 once invoked), scanned A, original, Apache-2.0.

A verification assistant for testing a skill against prepared evaluation examples, called fixtures. It can simulate prose-producing skills or execute code-producing skills in a local test application.

In plain words
What is it for?
Evaluating test plans, reports, and other written outputs; running generated test code; checking files and exit codes; and reporting failed assertions honestly.
Why use it?
It shows whether a skill follows its instructions and produces the expected result. Code outputs are checked by running them, while prose outputs are checked against explicit assertions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Evaluating test plans, reports, and other written outputs; running generated test code; checking files and exit codes; and reporting failed assertions honestly.

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Install with agentmods
npx agentmods add skills/timothyhan/qa-buddy-skills/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 TimothyHan/qa-buddy-skills --skill eval
Clone the repo
git clone --depth 1 https://github.com/TimothyHan/qa-buddy-skills

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 eval

README.md
[![agentmods](https://agentmods.dev/badge/skills/timothyhan/qa-buddy-skills/eval.svg)](https://agentmods.dev/skills/timothyhan/qa-buddy-skills/eval)
Your own site
<a href="https://agentmods.dev/skills/timothyhan/qa-buddy-skills/eval"><img src="https://agentmods.dev/badge/skills/timothyhan/qa-buddy-skills/eval.svg" alt="Measured on agentmods" height="20"></a>
Per session 130 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,073 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium MCP Rug Pull · line 32
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 119
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
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 $0.00130 $0.02073
Opus 5 $0.00065 $0.01037
Sonnet 5 $0.00026 $0.00415
Haiku 4.5 $0.00013 $0.00207

Measured 7d ago against content hash 1202194cfff0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (tests/fixture-app/server.js), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

core/skills/eval/SKILL.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/qa-eval: Skill Eval Testing

You run eval fixtures against a skill to verify it produces correct output. Each fixture declares its mode:

  • simulate (default) — read the skill's instructions, simulate the scenario, check assertions against the hypothetical output. For skills whose output is prose (reports, verdicts, plans).
  • execute — actually run the skill against the local fixture app, then grade the artifacts it produced by executing them (npx playwright test, greps, file checks). For skills whose output is code (/qa-e2e-setup, /qa-e2e-pom, /qa-e2e-write). A generated artifact passes only by running, never by looking right.

Constraints

  1. One skill at a time. Don't run all skills in one session — context window.
  2. Follow the skill's instructions exactly. When simulating or executing, you are that skill. Apply its constraints, phases, and methodology references.
  3. Grade honestly. If an assertion fails, report it — don't rationalize a pass.
  4. Assertions are literal. contains "READY" means the string "READY" appears in the output. Don't interpret loosely.
  5. Simulate mode never touches the real environment — no browsers, no Jira, no file writes.
  6. Execute mode touches ONLY the local fixture app and a scratch workspace. Never external systems: no Jira, no real staging URLs, no network beyond localhost. All generated artifacts go in a throwaway workspace directory, never the QABuddy repo.
  7. Never open ANSWER-KEY.md while acting as the skill under eval. The answer key is for grading only. Discovery must happen against the running app. Reading the key mid-simulation invalidates the fixture — report it as a harness error, not a pass.
  8. Scripted user responses replace the user. Execute fixtures include user_responses for the skill's interactive gates. Answer exactly as scripted. If the skill never asks at a gate where a response was scripted, that's a finding — several fixtures assert the skill does pause.

Read the full file on GitHub · 187 lines

Files

What ships with it

5 files 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. 7d ago First seen · 187 lines · 130 tokens per session scan A 1202194cfff0

Subscribe to this mod's changes

eval is a skill published in the GitHub repository TimothyHan/qa-buddy-skills (7 stars, last pushed yesterday), licensed Apache-2.0. It adds 130 tokens to every session and 2,073 once invoked, about $0.0006 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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