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.
npx agentmods add rules/obviousworks/vibe-coding-ai-rules/100-testinggit clone --depth 1 https://github.com/obviousworks/vibe-coding-ai-rulesWhat 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 | $0.00000 | $0.00234 |
| Opus 5 | $0.00000 | $0.00117 |
| Sonnet 5 | $0.00000 | $0.00047 |
| Haiku 4.5 | $0.00000 | $0.00023 |
Grade A, and why
100-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 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.
What it actually says
Testing Standards
Test Structure
- Use Arrange-Act-Assert (AAA) pattern
- One assertion concept per test
- Descriptive test names: "should [expected behavior] when [condition]"
Coverage Requirements
- Critical paths: minimum 80% coverage
- Security-related code: minimum 90% coverage
- Utility functions: minimum 95% coverage
Test Types
- Unit tests: isolated, fast, no external dependencies
- Integration tests: test component interactions
- E2E tests: critical user journeys only
Mocking
- Mock external dependencies, not internal logic
- Use dependency injection for testability
- Reset mocks between tests
Anti-Patterns to Avoid
- No test interdependencies
- No hardcoded test data (use factories/fixtures)
- No testing implementation details (test behavior)
- No sleeping/waiting (use proper async patterns)
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.
- 2d ago First seen · 34 lines · 0 tokens per session scan A 1b92684025c9
100-testing is a cursor rule published in the GitHub repository obviousworks/vibe-coding-ai-rules (88 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 234 tokens. 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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