define-regression-scope

define-regression-scope is a skill for Claude Code, Codex from lespaceman/athena-workflow-marketplace. It costs 137 tokens per session (1,676 once invoked), scanned A, original, no licence file.

A guide for deciding which tests to rerun after a software change. Regression testing means checking existing behaviour again to catch unintended breakage.

In plain words
What is it for?
It helps define what to test beyond basic smoke checks, explain why each area is included, and choose how deeply to test it.
Why use it?
It helps avoid choosing regression tests by guesswork, especially for releases, hotfixes, changed areas, or risky features.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the regression-testing plugin — 1 skill shipped together

Good fit It helps define what to test beyond basic smoke checks, explain why each area is included, and choose how deeply to test it.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lespaceman/athena-workflow-marketplace/define-regression-scope
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 lespaceman/athena-workflow-marketplace --skill define-regression-scope
Clone the repo
git clone --depth 1 https://github.com/lespaceman/athena-workflow-marketplace

Made for: Claude Code, Codex.

Or install regression-testing, the plugin that ships this one along with the rest of its 1 skill.

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 define-regression-scope

README.md
[![agentmods](https://agentmods.dev/badge/skills/lespaceman/athena-workflow-marketplace/define-regression-scope/github.svg)](https://agentmods.dev/skills/lespaceman/athena-workflow-marketplace/define-regression-scope)
Your own site
<a href="https://agentmods.dev/skills/lespaceman/athena-workflow-marketplace/define-regression-scope"><img src="https://agentmods.dev/badge/skills/lespaceman/athena-workflow-marketplace/define-regression-scope/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 define-regression-scope

Your own site · 80×15
<a href="https://agentmods.dev/skills/lespaceman/athena-workflow-marketplace/define-regression-scope"><img src="https://agentmods.dev/badge/skills/lespaceman/athena-workflow-marketplace/define-regression-scope.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 137 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,676 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 $0.00137 $0.01676
Opus 5 $0.00068 $0.00838
Sonnet 5 $0.00027 $0.00335
Haiku 4.5 $0.00014 $0.00168

Measured 10d ago against content hash 3a865f380988, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

define-regression-scope 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 10d 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.

plugins/regression-testing/skills/define-regression-scope/SKILL.md · 191 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 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.

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. 10d ago First seen · 191 lines · 137 tokens per session scan A 3a865f380988

Subscribe to this mod's changes

define-regression-scope is a skill published in the GitHub repository lespaceman/athena-workflow-marketplace (4 stars, last pushed 5d ago), with no licence file. It adds 137 tokens to every session and 1,676 once invoked, about $0.0007 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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