What is testing.add_end_to_end_tests?

A procedure for adding end-to-end tests for command-line tools. End-to-end tests run a tool as a user would and check its complete behavior from input to output.

Use it to add tests for executable commands, follow the repository's testing rules, and run the new tests to verify they pass.

It helps catch problems across the full command-line workflow rather than checking only individual functions.

testing.add_end_to_end_tests — Skill for Claude Code by gpsaggese

Install

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.

Any agent

npx skills add gpsaggese/helpers --skill testing.add_end_to_end_tests

Clone the repo

git clone --depth 1 https://github.com/gpsaggese/helpers

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/gpsaggese/helpers/testing.add_end_to_end_tests/github.svg)](https://agentmods.dev/skills/gpsaggese/helpers/testing.add_end_to_end_tests)

Your own site

<a href="https://agentmods.dev/skills/gpsaggese/helpers/testing.add_end_to_end_tests"><img src="https://agentmods.dev/badge/skills/gpsaggese/helpers/testing.add_end_to_end_tests/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/gpsaggese/helpers/testing.add_end_to_end_tests"><img src="https://agentmods.dev/badge/skills/gpsaggese/helpers/testing.add_end_to_end_tests.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 155 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.

Model	Per session	Once invoked
Fable 5.1	$0.00009	$0.00155
Opus 5.5	$0.00004	$0.00062
Sonnet 5.5	$0.00002	$0.00031
Haiku 4.5	$0.00001	$0.00015

Measured yesterday against content hash 852666d4bf23, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

testing.add_end_to_end_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 yesterday.

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:

testing.add_end_to_end_tests — 86% identical, 0 lines differ

.claude/skills/testing.add_end_to_end_tests/SKILL.md · 21 lines

What it actually says

Goal

Add end-to-end tests for command-line tools using the rules in .claude/skills/testing.rules.md # End-to-end Unit Tests for Executables

Important

All invariants and conventions for unit tests are documented in .claude/skills/testing.rules.md
For all code you must follow the instructions in .claude/skills/coding.rules.md

Verification

Run the new end-to-end tests and confirm they pass
Confirm the tests follow # End-to-end Unit Tests for Executables in .claude/skills/testing.rules.md

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.

yesterday First seen · 21 lines · 9 tokens per session scan A 852666d4bf23

Subscribe to this mod's changes

testing.add_end_to_end_tests is a skill published in the GitHub repository gpsaggese/helpers (158 stars, last pushed today), licensed Apache-2.0. It adds 9 tokens to every session and 155 once invoked, about $0.0000 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 2026-11-06.

E2E testing Testing

testing.add_end_to_end_tests next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
testing.add_end_to_end_testsgpsaggese/helpers	Skill	158	today	Apache-2.0	A	9	Claude Code
verify-omnigentomnigent-ai/omnigent	Skill	11k	today	Apache-2.0	A	100	Claude Code, Codex
test-masterJeffallan/claude-skills	Skill	12k	8d ago	MIT	A	104	Claude Code
eval-dataset-designbojieli/ai-agent-book	Skill	57k	1mo ago	Apache-2.0	A	138	Claude Code, Codex
dogfoodcallstack/agent-device	Skill	5.3k	today	MIT	A	55	Claude Code
cua-driverdavidondrej/skills	Skill	4.3k	yesterday	MIT	A	68	Claude Code, Codex
test-warp-uiwarpdotdev/warp	Skill	66k	today	AGPL-3.0	A	55	Claude Code