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 instructions/popoloni/non_deterministic_sw_eng/testsgit clone --depth 1 https://github.com/popoloni/non_deterministic_sw_engWhat 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 | $0.00176 | $0.00176 |
| Opus 5 | $0.00088 | $0.00088 |
| Sonnet 5 | $0.00035 | $0.00035 |
| Haiku 4.5 | $0.00018 | $0.00018 |
Grade A, and why
non_deterministic_sw_eng tests.instructions.md 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 File Guidelines
When writing tests in this project:
Structure
- Use
describeblocks to group related tests - Test descriptions should start with a verb
- One assertion per test when possible
Table-Driven Tests
For utilities with multiple input/output cases:
const cases = [
{ input: x, expected: y, name: 'description' },
];
cases.forEach(({ input, expected, name }) => {
it(name, () => expect(fn(input)).toBe(expected));
});
Mocking
- Use
vi.mockfor module mocking - Use MSW for API mocking
- Reset mocks in
beforeEach
Coverage
- New code requires 80% coverage
- Critical paths require 100% coverage
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 · 176 tokens per session scan A 0fab8c5dc8fa
non_deterministic_sw_eng tests.instructions.md is an instructions file published in the GitHub repository popoloni/non_deterministic_sw_eng (6 stars, last pushed 8mo ago), licensed MIT. It adds 176 tokens to every session, about $0.0009 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.
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