prodtest

A senior-QA testing workflow for a newly implemented feature. It finds the project's test tools, writes tests, and uses Playwright to test the running app in a browser.

In plain words
What is it for?
Use it for unit, integration, functional, and end-to-end testing, with screenshots saved for review. It can either fix found bugs or report them, after asking which approach to use.
Why use it?
It checks a feature at several levels and helps reveal defects that unit tests alone may miss.

Skill for Claude CodeCodex

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 skills/nazmulnahid-git/ai-stack/prodtest
Any agent
npx skills add nazmulnahid-git/Ai-Stack --skill prodtest
Clone the repo
git clone --depth 1 https://github.com/nazmulnahid-git/Ai-Stack

Made for: Claude Code, Codex.

Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,323 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 $0.00090 $0.01323
Opus 5 $0.00045 $0.00661
Sonnet 5 $0.00018 $0.00265
Haiku 4.5 $0.00009 $0.00132

Measured 2d ago against content hash 89597803c52d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prodtest 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.

skills/prodtest/SKILL.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

prodtest

Test a feature the way a senior QA engineer would: find out what the feature actually claims to do, then try to break it — at the unit, integration, and browser level.

Step 0 — Ask the fix policy first

Before writing anything, ask once:

Should I fix bugs as I find them, or only report them?

Wait for the answer. It governs the whole run:

  • Fix mode — when a test fails because the product is wrong, fix the product, re-run, and note the fix in the report.
  • Report-only mode — leave the failing test in place (or document the repro), change no product code, and list every defect at the end.

In both modes, a test that fails because the test is wrong is always yours to fix.

Step 1 — Identify the feature under test

  • Use the user's description if given.
  • Otherwise diff the branch: git diff $(git merge-base HEAD origin/main)...HEAD --stat plus recent commit messages, and read the changed handlers, components, and models.
  • Write down, in 3–6 bullets, what the feature is supposed to do — the behaviors you are about to verify. Show these to the user as your test basis; a wrong premise here wastes the whole run.

Step 2 — Learn the real test stack (do not assume)

Read, don't guess:

  • package.json / pyproject.toml / composer.json / go.mod — which runner exists (vitest, jest, pytest, phpunit, go test) and which scripts run it.
  • An existing test file near the feature — copy its imports, factories, fixtures, mocking style, DB setup/teardown, and naming. Match the house style exactly.
  • CI config — the command that must pass.
  • How the app boots locally (dev script, env vars, docker compose, seed/migrate commands) and on which port.

If no test infrastructure exists at all, say so and propose the minimal setup before installing anything.

Step 3 — Unit tests

Cover the pure logic the feature introduced: calculations, validators, reducers, permission predicates, formatters, state machines.

For each unit: the happy path, then the edges that actually bite — empty, null/undefined, zero, negative, very large, unicode, duplicates, boundary values, wrong types at trust boundaries, timezone/DST for dates, rounding for money.

Read the full file on GitHub · 134 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 · 134 lines · 90 tokens per session scan A 89597803c52d

Subscribe to this mod's changes

prodtest is a skill published in the GitHub repository nazmulnahid-git/Ai-Stack (2 stars, last pushed 24d ago), licensed MIT. It adds 90 tokens to every session and 1,323 once invoked, about $0.0005 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 2026-08-31.