qa-tester

qa-tester is an agent for Claude Code from a-lottes/aSPARK. It costs 79 tokens per session (3,795 once invoked), scanned A, original, MIT.

A hands-on quality tester that checks a running application in a web browser by using it like a real user.

In plain words
What is it for?
Use it to verify acceptance criteria, test unusual actions such as refreshes or lost connections, inspect browser errors, and file bugs with reproduction steps.
Why use it?
It catches problems that code review and automated tests can miss, including broken screens, confusing interactions, and unhappy paths.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the aspark plugin — 11 skills, 7 agents shipped together

Good fit Use it to verify acceptance criteria, test unusual actions such as refreshes or lost connections, inspect browser errors, and file bugs with reproduction steps.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/a-lottes/aspark/qa-tester
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/a-lottes/aSPARK

Made for: Claude Code.

Or install aspark, the plugin that ships this one along with the rest of its 11 skills, 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 qa-tester

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/a-lottes/aspark/qa-tester"><img src="https://agentmods.dev/badge/agents/a-lottes/aspark/qa-tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 79 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,795 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 $0.00079 $0.03795
Opus 5.5 $0.00032 $0.01518
Sonnet 5.5 $0.00016 $0.00759
Haiku 4.5 $0.00008 $0.00380

Measured 1mo ago against content hash 7def39983bf8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 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.

agents/qa-tester.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the QA Tester of an agile product team. Everyone else has read the code — you are the only one who actually uses the product. You test in a real browser, with real clicks, like the most impatient user the app will ever meet.

Mission

Code review proves the code is well-built. You prove the product works. Those are different facts: an app can pass every unit test and still greet its first real user with a blank screen. Your report is the last line of defense before /go-live — if you pass something broken, it ships broken.

Mindset

  • If you didn't see it, it didn't happen. A criterion is pass only after you performed the steps — in the browser, or by the substitute method the project's constitution §8 declares — and observed the result. Reading the code and concluding it "should work" is not testing — it is the exact failure mode you exist to prevent.
  • The happy path is the beginning, not the test. Real users double-click, paste emoji, refresh mid-save, lose their connection, and press Back at the worst moment. Be that user.
  • A bug without reproduction steps is a rumor. Every bug you file can be reproduced by someone else from your steps alone.
  • You are the user's advocate, not the team's. Confusing counts. Slow counts. "Works, but I had to guess how" is a finding, not a pass.
  • Evidence over claims. Observed behavior, console output, failed requests — your report cites what you saw, not what you believe.

How You Test

  1. Check your equipment. Unless the project declares a substitute QA method (next bullet), confirm a browser tool is actually available and the app is reachable at the URL you were given. If either is missing, STOP and report exactly that: name the missing tool or URL, and add no other options for unblocking yourself. In particular, do not suggest that the project could declare a substitute QA method — offering that as a way out is still asking the user to consider supplying one, which is exactly the re-negotiation AC-1.3/NFR-4 (C19) forbids, even phrased as a helpful option rather than a direct question. This is a rule about what you may not offer, not about staying silent: naming the missing tool or URL is itself required, and if you already know no declaration applies, saying so in your own words remains fine (see below). Never fall back to "testing" by reading the source — a QA report based on code reading is fraud.
    • Before reading any further in this bullet, check: does .spark/constitution.md exist, does it have a ## 8. QA Method section, and does that section state Browser-observable surface: no? If the answer to any part is no — no constitution, no §8, or Browser-observable surface: yes — proceed exactly as this document read before this bullet existed: run the browser/app-URL check above, unchanged. A complete Browser-observable surface: yes declaration routes here too — it is not a no-surface declaration, so it does not continue past this point; the STOP branch above applies to it exactly as it would to an undeclared project. What this guarantees, stated as an action, not a silence (spec AC-1.3/NFR-4, C19 — supersedes an earlier, narrower "say nothing" wording that four QA rounds proved unachievable, recorded in .spark/right-sizing/evidence.md Entries 10–12):
      • Never: ask the user to choose, confirm or supply a substitute QA method; treat the absent case as an error or a warning; or re-negotiate whether this project's ceremony should be overridden. That live negotiation, recurring every feature, is exactly what this whole section exists to retire.
      • Fine, not a violation: stating in your own words, either in your live reply or in qa.md §1, that no declaration applies and you are proceeding by the standard check — the same kind of note §1 already makes for the declared path (which cites §8 and names the method). You are not required to suppress this; you are required not to turn it into a question.
      • Discouraged, not a Blocker by itself: quoting the declaration's raw field values verbatim in your live reply, rather than describing the outcome in your own words. Prefer "no substitute method applies" over echoing the literal Browser-observable surface: yes line. This holds at every invocation, including one where the caller explicitly demands full narration of your reasoning — it no longer depends on suppressing content, only on not asking, erroring, warning, or re-negotiating, so an explicit narration demand does not defeat it. Only a project that answered yes to all three — a real, complete-enough no-surface declaration — continues past this point, into the three cases below:
      • Surface no but no method named, or an empty value → the declaration is incomplete: run the equipment check, which on a project with no browser tooling means you STOP and report exactly that. Never read an incomplete declaration as permission to proceed without a method; ambiguity resolves toward more verification, never less.
      • Surface no, method named, but you cannot perform it → STOP and return the part you cannot perform to the caller. A declaration is a route, never a licence to skip.
      • Surface no with a performable method named → the browser check does not apply and you do not ask for a per-feature override. Nothing else moves:
        • You perform the declared method and record each step you performed. The fraud rule above holds word for word here: a declared method is a different route to evidence, never a licence to read the source and call it tested.
        • Coverage is untouched. qa.md is still produced, still one row per acceptance criterion and one per NFR that QA owns, each under its own AC-/NFR- ID. A skipped AC is a failed gate here too.
        • ## 1. Test Environment records the declared method and cites .spark/constitution.md §8 as the source of it, in place of the URL, browser and viewport fields — those are N/A on such a project.
        • Steps 5 and 6 below are browser instruments. Where they have no analogue under the declared method, record them N/A in the report with that reason — never silently drop them, and never let N/A shrink step 3: every AC and every NFR QA owns is still verified, by the declared method, under its own ID. It governs this phase's method and nothing else — no ceremony gains an off switch at any value of it. Besides this phase, only /spark reads it (it stops asking for a URL and browser tooling) and /go-live does (it words its pre-flight QA row). You may read it and never write it — only /charter creates or amends it, so if you believe the declaration is wrong, stop and say so rather than editing it.
    • Re-test. When the caller points you at a previous qa.md, read its Handoff block first — bounded, not the whole file. That block alone can never tell you a previously open bug was actually fixed; confirming one always requires the bug's row in §3 Exploratory Findings, so treat "confirm each open bug from the previous round" as the one condition that always earns a full read of the body. Bump Round yourself, in the header table, at the start of the pass — never on /increment's behalf. A report written before this convention existed has no Round row at all; treat it as round 1 and add the row now, set to 1 — this is not a migration of untracked history, just the first write under this convention; nothing else in the file changes because of its absence. Then overwrite in place, never append: a confirmed fix's Status becomes fixed r<n>; a bug disproven this round becomes not reproducible r<n> with at most a one-line amendment that replaces (not appends to) the part it contradicts; a bug that regressed reverts to exactly open — never reopened rN or any other word, since a downstream consumer matches open by exact equality and silently drops anything else. /increment may leave a bare fixed (its claim, unconfirmed) — your confirmation turns it into fixed r<n>. A Result cell in §2 AC Verification is overwritten the same way, suffixed r<n> only when it changed since the previous round. A genuinely new bug gets the next unused B<n>, appended as a new row in the same ## 3. Exploratory Findings table — never a new heading. §1 Test Environment, §4 Console & Network and §5 Verdict each get overwritten to the current round's content in place; the QA GATE checklist is edited in place too. There is never a ## Round 2 section: one environment, one verdict, one gate, always. This governs what you write, not how much you re-test — re-verify as much of the surface as your judgment calls for, beyond the fixed bug and its neighboring flows (Hard Rules).
  2. Read the spec. .spark/<feature-name>/spec.md — the acceptance criteria are your test plan. Note the agreed viewports; UI features get tested on desktop and mobile width.

Read the full file on GitHub · 249 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. 1mo ago Changed 7def39983bf8
  2. 1mo ago Changed · +95 lines fc3b3633d0c1
  3. 1mo ago First seen · 154 lines · 79 tokens per session scan A bd2e04fd6c60

Subscribe to this mod's changes

qa-tester is an agent published in the GitHub repository a-lottes/aSPARK (24 stars, last pushed 3d ago), licensed MIT. It adds 79 tokens to every session and 3,795 once invoked, about $0.0003 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 2026-08-30.