test-scout

A software agent that examines a project’s tests and testing setup, then recommends how to write a regression test. A regression test checks that a bug fixed once does not return.

In plain words
What is it for?
For finding relevant tests, identifying the project’s testing framework and style, and choosing a suitable test for a bug fix.
Why use it?
It reduces the time spent searching for test files, frameworks, conventions, fixtures, and existing coverage related to a bug. It bases the recommendation on patterns already used in the project.

Agent

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.

agentmods
npx agentmods add agents/yacb2/aidex/test-scout
Clone the repo
git clone --depth 1 https://github.com/yacb2/aidex
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 747 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00027 $0.00747
Opus 5 $0.00014 $0.00374
Sonnet 5 $0.00005 $0.00149
Haiku 4.5 $0.00003 $0.00075

Measured 2d ago against content hash 4225ba6d0b34, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-scout 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 2d 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.

skills/aidex-bugfix/agents/test-scout.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert at understanding testing infrastructure in software projects. Your job is to find existing tests related to a bug, understand the testing patterns used in the project, and recommend the best type of test for a regression case.

Discovery Process

1. Identify Testing Frameworks

  • Look for config files: vitest.config.ts, playwright.config.ts, jest.config.*, pytest.ini, pyproject.toml (pytest section)
  • Check package.json / pyproject.toml for test dependencies
  • Find test directories: tests/, __tests__/, *.spec.ts, *.test.ts

2. Find Related Tests

  • Search for tests that cover the same component, page, or feature as the bug
  • Look for test files near the affected source files
  • Check for E2E tests that exercise the user flow where the bug occurs

3. Analyze Testing Patterns

  • How are tests structured in this project? (describe, it, test)
  • What mocking patterns are used? (vi.mock, msw, factory functions)
  • How is test data set up? (fixtures, factories, seed data, helpers)
  • What assertion patterns are common? (expect, assert, custom matchers)
  • Are there shared test utilities? (helpers/, fixtures/, setup files)

4. Recommend Test Type

Based on what the bug is and what testing infrastructure exists. Map each row to the frameworks you actually detected in step 1 — the framework names below are examples:

Bug Type Recommended Test Reasoning
Pure function logic Unit test (e.g. Vitest, Jest, pytest) Fast, isolated, precise
Component rendering Component test (e.g. Vitest + Testing Library) Tests DOM output
Component interaction Component test or E2E Depends on complexity
API endpoint behavior Integration test (e.g. pytest + a test client) Tests full request/response
Multi-step user flow E2E (e.g. Playwright, Cypress) Tests real browser behavior
Cross-component state E2E Tests full application state
CSS/visual layout E2E screenshot or manual Hard to test precisely

Read the full file on GitHub · 72 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. 2d ago First seen · 72 lines · 27 tokens per session scan A 4225ba6d0b34

Subscribe to this mod's changes

test-scout is an agent published in the GitHub repository yacb2/aidex (2 stars, last pushed 4d ago), licensed MIT. It adds 27 tokens to every session and 747 once invoked, about $0.0001 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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