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/mthines/agent-skills/e2e-testing-mobilenpx skills add mthines/agent-skills --skill e2e-testing-mobilegit clone --depth 1 https://github.com/mthines/agent-skillsWrote 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/mthines/agent-skills/e2e-testing-mobile)<a href="https://agentmods.dev/skills/mthines/agent-skills/e2e-testing-mobile"><img src="https://agentmods.dev/badge/skills/mthines/agent-skills/e2e-testing-mobile.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 | $0.00202 | $0.03634 |
| Opus 5 | $0.00101 | $0.01817 |
| Sonnet 5 | $0.00040 | $0.00727 |
| Haiku 4.5 | $0.00020 | $0.00363 |
Grade A, and why
e2e-testing-mobile 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.
How it starts
The opening of the file, as written. The whole thing — 318 lines — stays where its author put it; the contents beside it link to each section on GitHub.
E2E Testing — Mobile (Expo / React Native)
Drive native mobile end-to-end tests through Maestro and Maestro MCP. The user writes (or approves) a Markdown feature spec; an agent emits a Maestro YAML flow, runs it against a simulator or Maestro Cloud, and self-heals when locators drift.
This is the mobile counterpart to e2e-testing.
Anything orthogonal to native (web flows, WebViews inside a hybrid app)
defers to that skill.
The two skills compose; they do not overlap.
This
SKILL.mdis a thin index. Decision rules live inrules/*.mdand load on demand. Worked references (Maestro CLI surface, MCP tool catalog, EAS Workflow wiring, Detox legacy notes, mobile pyramid math) live inreferences/*.md. Literal boilerplate the skill emits lives intemplates/*.md. Do not preload everything — load only what the current phase asks for.
When to use
Reach for this skill when any of the following is true:
- An Expo or React Native app needs E2E coverage of a native user flow.
- A bug only repros across native navigation, deep links, push, permissions prompts, or a real device sensor.
- A flake needs a Maestro heal pass instead of a manual locator hunt.
- The repo has no
.maestro/flows or EAS E2E build profile yet and needs Phase 0 setup.
Do not reach for this skill when:
- A unit or component test would catch the same bug — defer to
tddand the layer rule inrules/layer-decision.md. - The flow is browser-only — defer to
e2e-testing. - The flow lives entirely inside a WebView in a hybrid app — defer to
e2e-testing, which automates the WebView via Playwright while Maestro handles native chrome around it. - The change is a pure refactor with no behavioural surface.
Phase 0 — Preflight (mandatory gate)
Before any agent loop, verify the repo is wired for Maestro on Expo / RN. Halt and ask the user before installing anything or producing builds.
What ships with it
15 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.
- references/detox-legacy.md 4.7 KB
- references/eas-workflows.md 5.2 KB
- references/maestro-cli.md 5.0 KB
- references/maestro-mcp.md 6.7 KB
- references/pyramid-mobile.md 4.4 KB
- rules/anti-patterns.md 5.0 KB
- rules/layer-decision.md 5.6 KB
- rules/locator-strategy.md 6.9 KB
- rules/spec-first-flow.md 6.5 KB
- rules/token-budget.md 6.3 KB
- templates/eas-build-profile.json 606 B
- templates/eas-workflow.yaml 1.1 KB
- templates/flow.yaml 1.5 KB
- templates/install-plan.md 2.3 KB
- templates/testid-helper.tsx 2.3 KB
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 · 318 lines · 202 tokens per session scan A 7b6acc6e5261
e2e-testing-mobile is a skill published in the GitHub repository mthines/agent-skills (12 stars, last pushed yesterday), licensed MIT. It adds 202 tokens to every session and 3,634 once invoked, about $0.0010 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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