regression-testing

regression-testing is a skill for Claude Code from aws-samples/sample-ramp-aidlc-mod-starter-packs. It costs 154 tokens per session (1,401 once invoked), scanned A, original, MIT-0.

A testing guide for creating a safety net before a major code change. It focuses on tests that check the behaviour users and other systems can observe.

In plain words
What is it for?
Planning regression tests before Java or JDK upgrades, framework migrations such as Spring Boot 2 to 3, runtime changes, and large refactors.
Why use it?
Large upgrades, migrations, and refactors can change behaviour even when the code still runs. This helps identify what must keep working before the change begins.

Skill for Claude Code ✓ vendor

Written for Claude Code: installed under .claude/.

Good fit Planning regression tests before Java or JDK upgrades, framework migrations such as Spring Boot 2 to 3, runtime changes, and large refactors.

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Install with agentmods
npx agentmods add skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing
About the project

AI-DLC for Modernization Starter Packs is a collection of reusable project templates for applying an AI-driven development lifecycle to application modernization work. Each pack gives teams structured instructions, skills, and agent-tool configurations for use with several coding agents. The catalogue entries are components and tool registrations included in these packs.

aws-samples/sample-ramp-aidlc-mod-starter-packs · 9 stars · on GitHub

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 aws-samples/sample-ramp-aidlc-mod-starter-packs --skill regression-testing
Clone the repo
git clone --depth 1 https://github.com/aws-samples/sample-ramp-aidlc-mod-starter-packs

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.

agentmods badge for regression-testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing/github.svg)](https://agentmods.dev/skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing)
Your own site
<a href="https://agentmods.dev/skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing"><img src="https://agentmods.dev/badge/skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing/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.

agentmods 80×15 button for regression-testing

Your own site · 80×15
<a href="https://agentmods.dev/skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing"><img src="https://agentmods.dev/badge/skills/aws-samples/sample-ramp-aidlc-mod-starter-packs/regression-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 154 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,401 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 unknown 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 $0.00154 $0.01401
Opus 5 $0.00077 $0.00700
Sonnet 5 $0.00031 $0.00280
Haiku 4.5 $0.00015 $0.00140

Measured 8d ago against content hash a51163d5795c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

regression-testing 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 8d 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.

framework-upgrade-containerise/scaffolded-packs/claude-code/.claude/skills/regression-testing/SKILL.md · 108 lines

The source is not reproduced here

Licensed MIT-0

The repository is licensed MIT-0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

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.

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. 8d ago First seen · 108 lines · 154 tokens per session scan A a51163d5795c

Subscribe to this mod's changes

regression-testing is a skill published in the GitHub repository aws-samples/sample-ramp-aidlc-mod-starter-packs (9 stars, last pushed yesterday), licensed MIT-0. It adds 154 tokens to every session and 1,401 once invoked, about $0.0008 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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