fusebase-flow: Skill for Claude Code

.agents/skills/app-e2e-tests/SKILL.md

app-e2e-tests is a skill for Claude Code from fusebase-dev/fusebase-flow. It costs 88 tokens per session (1,503 once invoked), scanned A, original, MIT.

A guide to end-to-end testing with Playwright, a tool that tests an application through a real browser. It supports one test suite running against multiple app environments, such as development and production.

In plain words
What is it for?
Use it to create, convert, configure, and run browser tests for Fusebase apps, including environment-specific tests and continuous integration.
Why use it?
It reduces repeated manual checking and helps catch problems that appear only when the whole app, its users, and its environment work together.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: installed under .agents/ (shared by several agents).

This is fusebase-dev/fusebase-flow's own configuration. It tells Claude Code how to work on fusebase-flow itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything fusebase-flow configures →

Part of the fusebase-flow plugin — 56 skills, 8 commands, 4 agents shipped together

Reuse

Borrowing it

Nothing to install: this file belongs to fusebase-dev/fusebase-flow. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/fusebase-dev/fusebase-flow/main/.agents/skills/app-e2e-tests/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/fusebase-dev/fusebase-flow

Made for: Claude Code.

Or install fusebase-flow, the plugin that ships this one along with the rest of its 56 skills, 8 commands, 4 agents.

Wrote 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.

agentmods badge for app-e2e-tests

README.md
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Your own site
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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.

agentmods 80×15 button for app-e2e-tests

Your own site · 80×15
<a href="https://agentmods.dev/skills/fusebase-dev/fusebase-flow/app-e2e-tests"><img src="https://agentmods.dev/badge/skills/fusebase-dev/fusebase-flow/app-e2e-tests.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,503 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00088 $0.01503
Opus 5.5 $0.00035 $0.00601
Sonnet 5.5 $0.00018 $0.00301
Haiku 4.5 $0.00009 $0.00150

Measured 2mo ago against content hash 01255cc713d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

app-e2e-tests 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 2mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.agents/skills/app-e2e-tests/SKILL.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

App E2E tests (environment-aware)

One suite in tests/e2e/, same specs against every environment of the project. Environments (fusebase env) supply everything varying between stages: base URLs, org/app ids, test users.

When e2e is being added as part of an environment migration, first follow the local guide App Environment Migration Guide, then use this skill for the Playwright harness and CI details.

When adding e2e to an existing project, first follow the local guide E2E Playwright Setup Guide: audit environments, prefer non-prod targets, warn before any prod run, scaffold from the CLI template, and wire GitLab CI.

Scaffold

fusebase scaffold --template e2e --dir tests/e2e
cd tests/e2e && npx playwright install chromium
FUSEBASE_ENV=<env> npm test

Layout — one project per app

playwright.config.ts generates one Playwright project per app in fusebase.json (name = the app's key, falling back to subdomain), each pinned to that app's env-effective URL. Specs live in:

  • specs/common/** — universal specs, run for EVERY app, app-aware via test.info().project.name.
  • specs/<appKey>/** — that app's own specs.

Adding an app: give it a short key in fusebase.json (e.g. probe), mkdir specs/<key>, add specs, add the key to the CI matrix APP list. Run a single app with --project=<appKey>.

Cross-app / portal flows (registration → access propagation across apps + portal) span more than one app and have NO single baseURL — they do not belong to any app's project. Put them in specs/integration/; the config adds an integration project whose specs build each app's URL via appBaseUrl(env, key). Add integration to the CI matrix APP list. Recipes: examples/cross-app-access.spec.ts, examples/portal-access.spec.ts. (Product-scoped magic links + one org = shared session across app subdomains, which is exactly what these flows assert.)

Non-negotiables

  1. Stage guard stays. specs/common/stage.spec.ts asserts each app's deployed fusebase-env.json matches the target env AND app. Never delete it — a run against the wrong stage/app is worse than no run.
  2. No hardcoded env data. Hosts, org/app ids, credentials come only from helpers/env.ts (environments/<name>.json + .env.<name>) and the project's baseURL. A spec that embeds a URL or id silently breaks on another environment or app.
  3. Fixtures self-skip. Use the fixtureUser(env, key) + test.skip pattern (see examples/role-matrix.spec.ts) so specs stay runnable while fixtures roll out per env.
  4. Cleanup. Tests that create data must delete it — prod-test environments are real orgs.
  5. No secrets in git. Passwords via PW_USER_<KEY>_PASSWORD in .env.<name> locally / CI variables in pipelines. Reports and traces are gitignored.

Read the full file on GitHub · 121 lines

Changes

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.

  1. 2mo ago First seen · 121 lines · 88 tokens per session scan A 01255cc713d7

Subscribe to this mod's changes

app-e2e-tests is a skill published in the GitHub repository fusebase-dev/fusebase-flow (9 stars, last pushed 13d ago), licensed MIT. It adds 88 tokens to every session and 1,503 once invoked, about $0.0004 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 2026-08-31.

Related

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app-e2e-tests next to 6 skills from other repositories
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