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/sgaabdu4/hard-eng/e2enpx skills add sgaabdu4/hard-eng --skill e2egit clone --depth 1 https://github.com/sgaabdu4/hard-engWrote 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/sgaabdu4/hard-eng/e2e)<a href="https://agentmods.dev/skills/sgaabdu4/hard-eng/e2e"><img src="https://agentmods.dev/badge/skills/sgaabdu4/hard-eng/e2e.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 5.1 | $0.00036 | $0.00495 |
| Opus 5 | $0.00018 | $0.00247 |
| Sonnet 5 | $0.00007 | $0.00099 |
| Haiku 4.5 | $0.00004 | $0.00049 |
Grade A, and why
e2e 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 6d 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.
How it starts
The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.
E2E
Contract
- Input = accepted behavior + runnable environment + target evidence mode.
- Evidence classes = automated assertions + persisted state + deployment + visual artifacts; independent status per class.
- Execute through real browser/device UI; exploratory control may discover the path.
- Durable regression = existing project E2E runner + conventions.
- Product defect → preserve reproduction/evidence; fix only when requested.
- Commands + hooks + CI →
deterministic-checks; assertion strength →test-quality. - Requested/produced screenshot or video → load visual-evidence.md + validate its receipt.
- Media inspection = isolated reader scope; main context = receipt +
path + sha256+ verdict only; raw media bytes in main context forbidden. - Proof media = local + display to user; stage/commit only when explicitly accepted as a product asset.
Route
| Target | Load |
|---|---|
| Web + Playwright | playwright.md |
| Flutter device/emulator | flutter.md; Riverpod app also → building-flutter-apps |
| Other stack | Existing project runner/docs; absent owner → report gap |
| Evidence mode | Required proof |
|---|---|
| Smoke/regression | User path + assertions + result; failure → diagnostic artifacts |
| UI review | Existing UI prototype → accepted requirements + real before screen + production render + comparable final state; new UI → accepted reference/mockup + final states |
| Audit/demo | Video only when requested or necessary to prove temporal behavior |
- Load only matching target reference; combine modes when requested.
- Missing environment/account/data/permission → exact blocker; never fabricate pass evidence.
Proof
| Result | Evidence |
|---|---|
PASS |
Every required evidence class independently PASS |
CONCERNS |
Partial surface + exact unproven behavior + next proof |
FAIL |
Reproduction step + expected/actual + failure artifacts |
- Artifact = smallest useful set; redact secrets + personal data.
- PASS requires visible outcome + durable state/source-of-truth evidence when behavior persists data.
What ships with it
7 files 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.
- 6d ago First seen · 47 lines · 36 tokens per session scan A 264f5c265c4d
e2e is a skill published in the GitHub repository sgaabdu4/hard-eng (5 stars, last pushed yesterday), licensed MIT. It adds 36 tokens to every session and 495 once invoked, about $0.0002 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 2026-08-30.
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