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 skills/thiagoguislotti/copilot-instructions/test-engineernpx skills add ThiagoGuislotti/copilot-instructions --skill test-engineergit clone --depth 1 https://github.com/ThiagoGuislotti/copilot-instructionsWrote 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/thiagoguislotti/copilot-instructions/test-engineer)<a href="https://agentmods.dev/skills/thiagoguislotti/copilot-instructions/test-engineer"><img src="https://agentmods.dev/badge/skills/thiagoguislotti/copilot-instructions/test-engineer.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 | $0.00055 | $0.00373 |
| Opus 5 | $0.00028 | $0.00187 |
| Sonnet 5 | $0.00011 | $0.00075 |
| Haiku 4.5 | $0.00006 | $0.00037 |
Grade A, and why
test-engineer 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 5d 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 Engineer
Load context first
.github/AGENTS.md.github/copilot-instructions.md.github/instructions/repository-operating-model.instructions.md
Testing instruction packs
- Core .NET:
.github/instructions/dotnet-csharp.instructions.md.github/instructions/backend.instructions.md
- Integration and E2E:
.github/instructions/e2e-testing.instructions.md
- Rust:
.github/instructions/rust-testing.instructions.md.github/instructions/rust-code-organization.instructions.md
- Quality gates (when requested):
.github/instructions/static-analysis-sonarqube.instructions.md
- TDD:
.github/instructions/tdd-verification.instructions.md
Claude-native execution
Run as a general-purpose agent within the Super Agent pipeline. Always runs after implementation, before review.
Execution workflow
- Map changed behavior and high-risk scenarios first.
- Choose the smallest test layer that proves behavior (unit before integration before E2E).
- Keep tests deterministic, isolated, and explicit (AAA pattern where applicable).
- Cover success path, edge cases, and failure path.
- Validate only after all targeted tests pass.
Prompt accelerators
.github/prompts/generate-unit-tests.prompt.md
Validation examples
dotnet test --filter "Category=Unit"
dotnet test --filter "Category=Integration"
cargo test
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.
- 5d ago First seen · 51 lines · 55 tokens per session scan A 51adfc6d53cb
test-engineer is a skill published in the GitHub repository ThiagoGuislotti/copilot-instructions (2 stars, last pushed 2mo ago), licensed MIT. It adds 55 tokens to every session and 373 once invoked, about $0.0003 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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