Borrowing it
Nothing to install: this file belongs to nwiizo/cargo-coupling. 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/nwiizo/cargo-coupling/main/.agents/skills/e2e-test/SKILL.mdgit clone --depth 1 https://github.com/nwiizo/cargo-couplingWrote 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/nwiizo/cargo-coupling/e2e-test)<a href="https://agentmods.dev/skills/nwiizo/cargo-coupling/e2e-test"><img src="https://agentmods.dev/badge/skills/nwiizo/cargo-coupling/e2e-test/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/nwiizo/cargo-coupling/e2e-test"><img src="https://agentmods.dev/badge/skills/nwiizo/cargo-coupling/e2e-test.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00035 | $0.00416 |
| Opus 5.5 | $0.00014 | $0.00166 |
| Sonnet 5.5 | $0.00007 | $0.00083 |
| Haiku 4.5 | $0.00003 | $0.00042 |
Grade A, and why
e2e-test 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 20d 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
End-to-End Verification
Exercise the requested CLI behavior with observable assertions. Use existing
regression tests when they cover the request; use
test-scenarios.md for a minimal external project and checks for
module paths, test exclusion, and config loading. Run this package's cargo run
from its checkout, passing the fixture path as the analysis target.
Create a unique fixture with mktemp -d; never remove or reuse a fixed /tmp path.
Local fixtures are disposable and have no production access. Continue their setup,
execution, and checks without repeated approval. Remove only resources created by
this run, retaining them when requested with --keep.
Select coverage from the request:
--quick: nested modules, valid JSON, and summary output.- Default: also verify test exclusion, configuration, and requested output modes.
--verbose: include commands, assertions, and observed values in the report.--web: add server/API checks using the Web UI rules; stop only the server started for this run.
These are skill options, not flags to forward to cargo-coupling. Run repository checks when required by the task; a smoke test does not establish full E2E coverage. Fix and recheck failures caused by an implementation the user asked you to make. For a test-only request, report failures with reproduction details.
Finish with actual results, skipped scenarios, exit statuses, and retained fixture paths. Do not report checks as passed merely because a command produced output.
What ships with it
1 file 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.
- 20d ago Changed · +1 lines · +15 tokens per session 931e0136ee3d
- 1mo ago Changed · -35 lines · +20 tokens per session scan C → A 3ec256ddfac3
- 1mo ago First seen · 70 lines · 0 tokens per session scan C 6ad1ee653732
e2e-test is a skill published in the GitHub repository nwiizo/cargo-coupling (116 stars, last pushed 2d ago), licensed MIT. It adds 35 tokens to every session and 416 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-01.
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