Borrowing it
Nothing to install: this file belongs to susomejias/rembric. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/susomejias/rembric/main/.agents/skills/testing/SKILL.mdgit clone --depth 1 https://github.com/susomejias/rembricWrote 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.
[](https://agentmods.dev/skills/susomejias/rembric/testing)<a href="https://agentmods.dev/skills/susomejias/rembric/testing"><img src="https://agentmods.dev/badge/skills/susomejias/rembric/testing.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.00675 |
| Opus 5 | $0.00024 | $0.00338 |
| Sonnet 5 | $0.00010 | $0.00135 |
| Haiku 4.5 | $0.00005 | $0.00068 |
Grade A, and why
testing 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Testing
Design tests that increase confidence, survive refactors, and reflect real usage.
Reference Map
- Read references/strategy.md when deciding what to test, how much to test, or how to prioritize coverage.
- Read references/fundamentals.md when you need the core mental model for assertions, frameworks, isolation, and useful failures.
- Read references/interaction-testing.md when testing user-visible behavior, flows, or observable system interactions.
- Read references/quality-gates.md when deciding how static checks, automated tests, manual checks, and delivery gates should work together.
- Read references/mocking.md when dealing with stubs, spies, mocks, randomness, or flaky external boundaries.
- Read references/glossary.md when the user asks about testing terminology.
Defaults
- Test behavior through public interfaces.
- Follow a testing trophy bias: lean on static checks and integration tests, with fewer unit and end-to-end tests.
- Prefer a few high-value integration tests over many shallow micro-tests.
- Mock only real boundaries: network, time, randomness, payments, third-party APIs.
- Choose assertions a user, caller, or downstream system would care about.
- Keep tests deterministic, small, and readable.
Workflow
- Identify the highest-risk behavior or workflow.
- Pick the cheapest test level that can prove it: static, unit, integration, or end-to-end.
- Arrange realistic inputs, state, and environment.
- Act through the public API, visible surface, or command boundary.
- Assert observable outcomes, not internal steps.
- Keep failures specific and setup cleanup reliable.
- Remove setup, mocks, and assertions that do not increase confidence.
Test Level Guide
- Unit: pure logic, parsing, formatting, branching, edge cases.
- Integration: component or service workflows, validation, state changes, error handling.
- End-to-end: a few critical user journeys or irreversible flows.
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 62 lines · 49 tokens per session scan A a71e17c75cc6
testing is a skill published in the GitHub repository susomejias/rembric (12 stars, last pushed 5d ago), licensed MIT. It adds 49 tokens to every session and 675 once invoked, about $0.0002 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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