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tailtest

v4.9.1

Automatically generates and runs tests alongside your Codex session. Any language. No commands. No setup.

Codex1 Skill

By AvanSaber Inc.License: MIT1.1k GitHub starsUpdated 16 hours ago

Directory evidence

Runtimes
Codex
Parsed components
1 skill or MCP entry
Source updated
Sep 23, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install tailtest for Codex

Installs for the current user
codex plugin marketplace add hashgraph-online/awesome-codex-plugins
codex plugin marketplace upgrade awesome-codex-plugins
codex plugin add tailtest@awesome-codex-plugins

Paste and run these commands in a terminal with Codex. They add and refresh the awesome-codex-plugins catalog, then install this plugin.

Compatibility: the page URL and API slug “tailtest” remain stable.

  • Codex: tailtest@agent-plugin-marketplace → tailtest@awesome-codex-plugins

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/hashgraph-online/awesome-codex-plugins

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/avansaber/tailtest-codex/.

Plugin files

plugins/avansaber/tailtest-codex/
├── .codex-plugin/plugin.json
└── skills/tailtest/SKILL.md

Included Skills1

tailtestskills/tailtest/SKILL.md

Generate test scenarios, write the test file, and run it for a specific source file using the tailtest R1-R15 rule layer. When the agent needs to (1) cover a file the Stop hook skipped, (2) regenerate tests after refactoring, (3) test a legacy file Codex did not modify this session, or (4) explicitly run tailtest on a named file.

Plugin manifests1

plugins/avansaber/tailtest-codex/.codex-plugin/plugin.json
{
  "name": "tailtest",
  "version": "4.9.1",
  "description": "Automatically generates and runs tests alongside your Codex session. Any language. No commands. No setup.",
  "author": {
    "name": "AvanSaber Inc.",
    "email": "[email protected]",
    "url": "https://avansaber.com"
  },
  "homepage": "https://tailtest.com",
  "repository": "https://github.com/avansaber/tailtest-codex",
  "license": "MIT",
  "keywords": [
    "testing",
    "auto-test",
    "codex",
    "openai",
    "assistant",
    "framework-agnostic"
  ],
  "hooks": "./hooks/hooks.json",
  "skills": "./skills/",
  "interface": {
    "displayName": "Tailtest",
    "composerIcon": "./assets/icon.svg",
    "shortDescription": "Auto-generates and runs tests on every Codex turn",
    "longDescription": "Tailtest watches every file Codex edits in your session and queues it for test generation at end of turn. It writes production-shaped scenarios using the R1-R15 rule layer, runs them, and surfaces only failures. Works with Python, JavaScript/TypeScript, Java, Kotlin, C#, Go, Rust, and Ruby out of the box. Supports an adversarial test mode that biases scenarios toward breakage paths (8 categories: boundary inputs, format/injection, type confusion, concurrent state, time/locale edges, partial failures, resource exhaustion, off-by-one logic). No prompting, no commands; runs automatically as Codex works.",
    "developerName": "AvanSaber Inc.",
    "category": "Coding",
    "capabilities": [
      "Interactive",
      "Write"
    ],
    "websiteURL": "https://tailtest.com",
    "defaultPrompt": [
      "Write tests for the file I just edited",
      "Run an adversarial scan on my last change",
      "Show tailtest summary for this session"
    ],
    "brandColor": "#F59E0B",
    "screenshots": []
  }
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[tailtest on Agent Plugins Marketplace](https://pluginsmp.com/plugins/tailtest)