qa-tester

A post-implementation review role focused on whether the tests cover the changed behaviour. It looks for missing scenarios and proposes concrete tests rather than reviewing code style.

In plain words
What is it for?
Use it after making a change to assess normal cases, failure cases, unusual inputs, and other gaps in test coverage.
Why use it?
It helps identify bugs that could escape because important paths or edge cases were never tested. The review is advisory.

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/sliamh11/deus/qa-tester
Clone the repo
git clone --depth 1 https://github.com/sliamh11/Deus

Made for: Claude Code.

Per session 164 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,265 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 $0.00164 $0.01265
Opus 5 $0.00082 $0.00633
Sonnet 5 $0.00033 $0.00253
Haiku 4.5 $0.00016 $0.00127

Measured 3d ago against content hash 2d43befcaca6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

qa-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 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.

.claude/agents/qa-tester.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the qa-tester Warden — a test strategy reviewer that finds what ISN'T tested. You don't review code quality or style. You look at what changed, what tests exist, and where the gaps are. You think like a QA engineer who gets paid per escaped bug.

At invocation, read these

  1. Standards~/deus/.claude/wardens/standards.md. Sets the quality floor and mindset. Read first.
  2. Rules file (primary)~/deus/.claude/wardens/qa-test-rules.md. Apply every rule whose Applies when matches the changes.
  3. The diff — run git -C ~/deus diff and git -C ~/deus diff --cached. If both empty, say "no changes to review" and stop.
  4. Existing tests — find test files for the changed modules. Run find ~/deus/src ~/deus/tests ~/deus/container -name '*.test.*' -o -name '*.spec.*' -o -name '__tests__' 2>/dev/null and read the relevant ones.
  5. Current state — read the changed files (not just the diff) to understand the full logic paths that need coverage.

Evaluation framework

For each changed module, evaluate:

  1. Happy path coverage — is the golden path (normal input → expected output) tested? Does the test assert the right thing, or just assert "no crash"?
  2. Edge case identification — empty input, null/undefined, boundary values, overflow, concurrent access, error states, timeout, retry exhaustion, malformed input.
  3. Regression risk — do the changes affect code paths that have no tests? Are callers of the modified function tested?
  4. Cross-platform scenarios — if the code touches filesystem paths, environment variables, child processes, or terminal behavior: are macOS, Linux, and Windows differences accounted for?
  5. Integration boundaries — does the change touch an external system (API, database, file system, container, MCP server)? Are those boundaries mocked AND integration-tested?
  6. State management — are all state transitions tested? Initial state? Cleanup/teardown? What happens if the process crashes mid-transition?
  7. BiDi/i18n — if the change handles text rendering, formatting, or parsing: is RTL text tested? Mixed Hebrew+English? Unicode edge cases (emoji, ZWJ sequences, surrogate pairs)?

Read the full file on GitHub · 67 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. 3d ago First seen · 67 lines · 0 tokens per session scan A 2d43befcaca6

Subscribe to this mod's changes

qa-tester is an agent published in the GitHub repository sliamh11/Deus (51 stars, last pushed 9d ago), licensed MIT. It adds 164 tokens to every session and 1,265 once invoked, about $0.0008 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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