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/solvapay/solvapay-sdk/tddgit clone --depth 1 https://github.com/solvapay/solvapay-sdkWhat 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 | $0.00017 | $0.00350 |
| Opus 5 | $0.00009 | $0.00175 |
| Sonnet 5 | $0.00003 | $0.00070 |
| Haiku 4.5 | $0.00002 | $0.00035 |
Grade A, and why
tdd 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
Test-Driven Development
Use RED-GREEN-REFACTOR for all bug fixes and new features.
Workflow
- RED -- Write a failing test that describes the expected behavior
- GREEN -- Write the minimal code to make the test pass
- REFACTOR -- Clean up the implementation while keeping tests green
Bug Fixes
Always write a test that reproduces the bug before writing the fix:
- Write a test that fails because of the bug
- Run the test to confirm it fails
- Fix the bug with minimal changes
- Run the test again to confirm it passes
- Refactor if needed
New Features
Write tests for the expected behavior before implementing:
- Define the expected inputs and outputs
- Write tests covering the happy path and key edge cases
- Implement until all tests pass
- Refactor the implementation
Test Structure
- Co-locate tests:
*.test.tsnext to the source file - One behavior per test: each
it()should test a single expectation - Descriptive names:
it('should throw when API key is missing') - Arrange-Act-Assert: set up data, call the function, check the result
Running Tests
npx vitest run <path>-- run a single test filenpx vitest --watch-- run tests in watch modenpx vitest run-- run all tests
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 · 47 lines · 17 tokens per session scan A 4b9dbe6c293f
tdd is a cursor rule published in the GitHub repository solvapay/solvapay-sdk (5 stars, last pushed 2d ago), licensed MIT. It adds 17 tokens to every session and 350 once invoked, about $0.0001 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.
Other cursor rules, from other repositories
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.
dev-standard
Apache Superset development standards and guidelines for Cursor IDE.
coolify-ai-docs
Master reference to all Coolify AI documentation in .ai/ directory.
typescript
Changes to these high-fan-out internals can affect every message, delta, element, or rerun. Keep work in them minimal, and benchmark changes with representative stress-test apps.
python_lib
Tips and guidelines specific to the development of the Streamlit Python library, not applicable to scripts and e2e tests.
specs
This directory contains product and tech specs for Streamlit features.