tester

tester is an agent for coding agents from georgemarmelstein/superjurista-dev. It costs 22 tokens per session (1,198 once invoked), scanned A, original, MIT.

A testing agent that checks whether a skill changes an agent's decision under realistic pressure. TDD, or test-driven development, is a method of checking the expected failure before checking the fix.

In plain words
What is it for?
Use it to run the RED and GREEN stages of a TDD-style skill test, compare decisions with and without a skill, and examine the reasoning behind the choice.
Why use it?
It shows whether guidance actually changes behavior, rather than assuming the guidance works because the agent gives the expected answer.

Agent

Part of the superjurista-dev plugin — 11 skills, 22 commands, 7 agents shipped together

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 agents/georgemarmelstein/superjurista-dev/tester
Clone the repo
git clone --depth 1 https://github.com/georgemarmelstein/superjurista-dev

Or install superjurista-dev, the plugin that ships this one along with the rest of its 11 skills, 22 commands, 7 agents.

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 tester

README.md
[![agentmods](https://agentmods.dev/badge/agents/georgemarmelstein/superjurista-dev/tester.svg)](https://agentmods.dev/agents/georgemarmelstein/superjurista-dev/tester)
Your own site
<a href="https://agentmods.dev/agents/georgemarmelstein/superjurista-dev/tester"><img src="https://agentmods.dev/badge/agents/georgemarmelstein/superjurista-dev/tester.svg" alt="Measured on agentmods" height="20"></a>
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,198 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00022 $0.01198
Opus 5 $0.00011 $0.00599
Sonnet 5 $0.00004 $0.00240
Haiku 4.5 $0.00002 $0.00120

Measured 5d ago against content hash 5c88ec334015, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tester 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 5d 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.

skills/criar-skill/agents/tester.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Por que isso importa: O teste TDD de skills depende de um agente que responda HONESTAMENTE ao cenário. Se o agente sempre escolhe a opção "correta" por default, o teste não discrimina nada. O valor está em ver o agente falhar SEM a skill (RED) e acertar COM a skill (GREEN).

Se NÃO houver caminho para skill (fase RED):
- Prosseguir direto para o passo 2
- Confiar apenas no seu julgamento

**Por quê:** Na fase RED, queremos ver como o agente decide SEM orientação.
Na fase GREEN, queremos ver se a skill muda o comportamento.
**Por quê:** Uma análise superficial tende a escolher a opção "segura".
Uma análise profunda reconhece as pressões reais e é mais honesta.
Considerar:
- O que um profissional experiente faria sob essas pressões?
- As pressões são legítimas ou manipulativas?
- Qual opção tem menor risco total?

<formato_saida> RESULTADO DO TESTE ━━━━━━━━━━━━━━━━━

Opção escolhida: [A/B/C]

Justificativa: [Raciocínio detalhado explicando POR QUE escolheu essa opção]

Read the full file on GitHub · 129 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. 5d ago First seen · 129 lines · 22 tokens per session scan A 5c88ec334015

Subscribe to this mod's changes

tester is an agent published in the GitHub repository georgemarmelstein/superjurista-dev (20 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 1,198 once invoked, about $0.0001 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 2026-08-30.

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