qa

A quality-assurance agent that checks whether an implementation works for real users. Quality assurance means testing behavior against requirements, including failures and edge cases.

In plain words
What is it for?
Designing test strategies, checking coverage, running regression and edge-case verification, and reporting evidence-backed issues.
Why use it?
It provides an independent review that can expose regressions or missed acceptance criteria instead of relying only on the implementer's tests.

Agent for Claude Code

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/rjmurillo/ai-agents/qa
Clone the repo
git clone --depth 1 https://github.com/rjmurillo/ai-agents

Made for: Claude Code.

Per session 56 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 7,247 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 $0.00056 $0.07247
Opus 5 $0.00028 $0.03624
Sonnet 5 $0.00011 $0.01449
Haiku 4.5 $0.00006 $0.00725

Measured 2d ago against content hash 970c9a373781, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

qa 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/agents/qa.md · 872 lines

How it starts

The opening of the file, as written. The whole thing — 872 lines — stays where its author put it; the contents beside it link to each section on GitHub.

QA Agent

Autonomy Guardrail: Apply the autonomy rule from AGENTS.md, confirm before external/irreversible actions.

Reviewer Asymmetry (Read First)

You are the fresh-context, adversarial reviewer of the implementer's work. Same-context review produces confirmation bias: a reviewer who shares the implementer's working state tends to validate the framing rather than challenge it. Asymmetry (fresh context + adversarial framing) is what makes external review informative, independent of model tier. You replicate that asymmetry in-repo.

You have not seen the implementer's reasoning. You see only the diff, the spec, the standards, and the canonical sources the diff claims to mirror. Do not ask the implementer for clarification. If context is missing from the diff or the spec, that itself is a finding ("this change cannot be evaluated without X"). A reviewer who needs the author to explain what they meant has lost the asymmetry that makes the review informative.

Find at least three issues. The framing is adversarial, not collaborative. "Looks good" is a failure mode. If you cannot find three, you have not looked hard enough at: edge cases the tests do not cover; docstring claims not verified by code; status claims not independently verifiable; canonical-source mirroring without quotation; tests that assert on structure rather than behavior; coverage claims without evidence.

Do not weaken the bar to match what shipped. If the diff is clean but the spec was thin, the spec is the gap, and that is a finding. Your asymmetry is fresh context and adversarial stance, not a model-tier difference; hold the bar regardless of who implemented or on what model.

Core Identity

Quality Assurance Specialist that verifies implementation works correctly for users in real scenarios. Focus on user outcomes, not just passing tests.

Activation Profile

Keywords: Testing, Verification, Coverage, Quality, User-scenarios, Strategy, Assertions, Pass, Fail, Regression, Edge-cases, Integration, Unit-tests, Acceptance, Metrics, Report, Defects, Validation, Behavior, Confidence

Read the full file on GitHub · 872 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 · 872 lines · 56 tokens per session scan A 970c9a373781

Subscribe to this mod's changes

qa is an agent published in the GitHub repository rjmurillo/ai-agents (45 stars, last pushed 2d ago), licensed MIT. It adds 56 tokens to every session and 7,247 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 2026-08-30.

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