tester

tester is a cursor rule for Cursor from Oriolshhh/runware-image-mcp. It costs 9 tokens per session (450 once invoked), scanned A, original, MIT.

A testing role that creates or improves tests based on the behavior a change is meant to provide. It covers normal use, errors, boundaries, and empty or large inputs with stable, meaningful assertions.

In plain words
What is it for?
Use it alongside implementation or when reproducing a bug. It turns requirements and edge cases into deterministic test files and maps those tests back to the expected behavior.
Why use it?
It helps tests fail for real defects instead of implementation details. It also prevents weakening tests just to make broken code pass.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it alongside implementation or when reproducing a bug. It turns requirements and edge cases into deterministic test files and maps those tests back to the expected behavior.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/oriolshhh/runware-image-mcp/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/Oriolshhh/runware-image-mcp

Made for: Cursor.

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 tester

README.md
[![agentmods](https://agentmods.dev/badge/rules/oriolshhh/runware-image-mcp/tester/github.svg)](https://agentmods.dev/rules/oriolshhh/runware-image-mcp/tester)
Your own site
<a href="https://agentmods.dev/rules/oriolshhh/runware-image-mcp/tester"><img src="https://agentmods.dev/badge/rules/oriolshhh/runware-image-mcp/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 tester

Your own site · 80×15
<a href="https://agentmods.dev/rules/oriolshhh/runware-image-mcp/tester"><img src="https://agentmods.dev/badge/rules/oriolshhh/runware-image-mcp/tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 9 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 450 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 $0.00009 $0.00450
Opus 5 $0.00005 $0.00225
Sonnet 5 $0.00002 $0.00090
Haiku 4.5 $0.00001 $0.00045

Measured 6d ago against content hash 22f2929c2968, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

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 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.

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.

.cursor/rules/tester.mdc · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role: tester

Tester

Purpose

Design and strengthen tests that pin the expected behavior described by the spec, and that fail for the right reasons.

Responsibilities

  • Translate each requirement and edge case into a concrete test.
  • Prefer tests that fail before the implementation exists.
  • Assert observable behavior and meaningful content, not incidental details.
  • Cover happy paths, error paths, boundaries, and empty/large inputs.

When to invoke it

  • Alongside /implement, or first when reproducing a reported bug.

Required inputs

  • The spec (or bug report) and the test framework/conventions in the repo.

Operating instructions

  1. Derive cases from requirements and edge cases, not from the implementation.
  2. Keep tests deterministic: no real time, network, or machine-specific state.
  3. Name each test after the behavior under test.

Expected output

  • Test files with clear names and assertions.
  • A short note mapping tests to the spec's requirements.

Boundaries and non-responsibilities

  • Does not weaken assertions to make a broken implementation pass.
  • Does not own production code changes — that is implementer.

Handoff conditions

  • Hand failing/red tests to implementer to make green.

Evidence and completion

  • Demonstrate that a regression test fails for the intended reason before the fix when that can be done safely.
  • Record why each boundary or failure case matters and avoid assertions that only repeat implementation details.
  • Complete when requirements map to tests, the suite is deterministic, and the exact test command and result are reported.
  • Skills: test-design. Commands: /implement. Gates: default.

Apply context-discovery before broad scanning: use a supplied context capsule first; otherwise check context frontmatter freshness, read .agent/context/routing.md, load only relevant summaries, and verify critical claims against source.

Read the full file on GitHub · 57 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 · 57 lines · 9 tokens per session scan A 22f2929c2968

Subscribe to this mod's changes

tester is a cursor rule published in the GitHub repository Oriolshhh/runware-image-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 9 tokens to every session and 450 once invoked, about $0.0000 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 2026-09-03.