manual-testing

manual-testing is a skill for Claude Code from lucasfcosta/backpressured. It costs 74 tokens per session (1,747 once invoked), scanned A, original, MIT.

A procedure for checking a feature by running the real application and using it like a person or client. It includes calling live API endpoints and controlling a real browser with Playwright, a browser-automation tool.

In plain words
What is it for?
Use it to start the application, test its acceptance criteria through real API and browser interactions, and check inexpensive failure cases such as invalid input or unavailable services.
Why use it?
Passing automated tests does not prove that the running application is wired correctly or that its error cases work. This adds a final check of the complete system before declaring the task finished.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the backpressured plugin — 9 skills, 1 agent, 1 MCP server shipped together

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/lucasfcosta/backpressured/manual-testing
Any agent
npx skills add lucasfcosta/backpressured --skill manual-testing
Clone the repo
git clone --depth 1 https://github.com/lucasfcosta/backpressured

Made for: Claude Code.

Or install backpressured, the plugin that ships this one along with the rest of its 9 skills, 1 agent, 1 MCP server.

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 manual-testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/lucasfcosta/backpressured/manual-testing.svg)](https://agentmods.dev/skills/lucasfcosta/backpressured/manual-testing)
Your own site
<a href="https://agentmods.dev/skills/lucasfcosta/backpressured/manual-testing"><img src="https://agentmods.dev/badge/skills/lucasfcosta/backpressured/manual-testing.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,747 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 5.1 $0.00074 $0.01747
Opus 5 $0.00037 $0.00873
Sonnet 5 $0.00015 $0.00349
Haiku 4.5 $0.00007 $0.00175

Measured 6d ago against content hash 6b8c72a82c76, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

manual-testing scanned grade A with 1 finding 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 6d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Not for:** replacing automated tests or per-iteration checks (this is the end gate, not every patch). Gate by what exists: an API → curl it; a UI → drive the browser; genuinely nothing runnable (or an explicit `BACKPRE
skills/manual-testing/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Manual Testing

Overview

You are the machine that uses the feature the way a client or a person will, so a human isn't the first to find out it doesn't actually work. Automated green is necessary, not sufficient: tests exercise the code, not the running system. Wiring, integration, env, and the error paths break in ways a passing unit test never sees. This is the "run it for real" gate.

Core principle: you only pass this on what you personally observed in the running app. Not "tests pass, so it works." Not "I curled the happy path." You booted it, you drove it, you saw each acceptance criterion — and the cheap failure cases — behave. Evidence, not inference.

When to Use

  • A backpressured loop's Phase 3, after automated checks are green, before the task is done. Always run it here — once before done, every time, even when the suite (including integration and end-to-end tests) is green. Automated tests are never a substitute (see Boundaries). The only thing that removes this gate is an explicit manual-testing opt-out in BACKPRESSURE.md's Skip section. It's slower than tests, so don't run it every iteration — mid-loop, run it only when something warrants it; but the before-done gate is not optional.

Not for: replacing automated tests or per-iteration checks (this is the end gate, not every patch). Gate by what exists: an API → curl it; a UI → drive the browser; genuinely nothing runnable (or an explicit BACKPRESSURE.md opt-out) → skip with a note saying why. A green test suite is not a reason to skip.

Step 1 — Get the app running, for real

Discover how to run it yourself — package.json scripts, Makefile, docker-compose, README, .env.example (or use project-specific run skills if they exist). Then actually boot it: start it in the background, tail the logs until it's genuinely healthy ("listening on :PORT", no startup errors), and note the URLs.

Set up the minimum real dependencies to exercise the feature: bring up the DB, run migrations, seed at least one real row, and obtain a valid auth token and a real id if the feature needs them. If it genuinely can't boot (missing secret, broken dep), report BLOCKED — do not fake it or skip to "tests pass."

Read the full file on GitHub · 74 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. 6d ago First seen · 74 lines · 74 tokens per session scan A 6b8c72a82c76

Subscribe to this mod's changes

manual-testing is a skill published in the GitHub repository lucasfcosta/backpressured (63 stars, last pushed 3mo ago), licensed MIT. It adds 74 tokens to every session and 1,747 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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