qa

qa is an agent for Claude Code from mathiasbourgoin/roster. It costs 15 tokens per session (386 once invoked), scanned A, original, MIT.

A testing role that checks whether implemented software behaves as required by running repeatable tests and focused scenarios. It reports a pass or fail result and records defects with steps for reproducing them.

In plain words
What is it for?
Use it after implementation or review to run relevant tests, broader regression checks, and targeted manual scenarios, then report failures, reproduction steps, and defect severity.
Why use it?
It helps catch broken behavior and regression bugs instead of relying only on code inspection or a few successful examples. It also makes clear which checks were run and which problems were found.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Part of the roster plugin — 40 commands, 8 agents shipped together

Good fit Use it after implementation or review to run relevant tests, broader regression checks, and targeted manual scenarios, then report failures, reproduction steps, and defect severity.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mathiasbourgoin/roster/qa
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.

Clone the repo
git clone --depth 1 https://github.com/mathiasbourgoin/roster

Made for: Claude Code.

Or install roster, the plugin that ships this one along with the rest of its 40 commands, 8 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 qa

README.md
[![agentmods](https://agentmods.dev/badge/agents/mathiasbourgoin/roster/qa/github.svg)](https://agentmods.dev/agents/mathiasbourgoin/roster/qa)
Your own site
<a href="https://agentmods.dev/agents/mathiasbourgoin/roster/qa"><img src="https://agentmods.dev/badge/agents/mathiasbourgoin/roster/qa/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 qa

Your own site · 80×15
<a href="https://agentmods.dev/agents/mathiasbourgoin/roster/qa"><img src="https://agentmods.dev/badge/agents/mathiasbourgoin/roster/qa.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 386 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 $0.00015 $0.00386
Opus 5.5 $0.00006 $0.00154
Sonnet 5.5 $0.00003 $0.00077
Haiku 4.5 $0.00002 $0.00039

Measured 1mo ago against content hash 85923b0ba6d6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 1mo 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 · 61 lines

What it actually says

QA

You validate delivered behavior against requirements.

Token discipline:

  • concise pass/fail reporting
  • concise defect reproduction notes

Workflow

  1. Read requirements and implemented scope.
  2. Run deterministic tests relevant to the change.
  3. Run broader regression checks when configured.
  4. Execute targeted manual scenarios when needed.
  5. Report pass/fail with concrete evidence.

Input Contract

Triggered by: tech-lead (post-implementation, post-review). Receives: sub-brief with behavior under test, expected outcomes, reproduction steps, and test commands.

Output Contract

  • result: pass or fail
  • executed checks
  • failing scenarios with repro steps
  • severity of observed defects

Next: → tech-lead with pass/fail verdict

Rules

  • do not approve when deterministic checks fail
  • do not mark pass on partial evidence
  • avoid speculative claims without reproduction
  • surface preexisting failures encountered during testing — never skip them as "out of scope"
  • be thorough: run the full suite, not just the happy path; agents can cover thousands of scenarios in an hour
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. 1mo ago First seen · 61 lines · 15 tokens per session scan A 85923b0ba6d6

Subscribe to this mod's changes

qa is an agent published in the GitHub repository mathiasbourgoin/roster (2 stars, last pushed 2d ago), licensed MIT. It adds 15 tokens to every session and 386 once invoked, about $0.0001 per session on Opus 5.5. 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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