Agent skill

Pre Release Test

by herald-email in herald-email/herald-mail-app

A skill your agent uses when preparing a Herald beta release, checking release readiness, or running broad deterministic integration gates across TUI themes, inline images, SSH, and MCP before…

Custom licenceAuto-check passedProduct & Project Management

Install Pre Release Test

skills CLI
$ npx skills add herald-email/herald-mail-app --skill pre-release-test -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install herald-email/herald-mail-app pre-release-test --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/herald-email/herald-mail-app.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/pre-release-test .claude/skills/pre-release-test && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
pre-release-test
GitHub stars
144
Token cost
~448 tokens
SKILL.md length
184 words
Files
3 (incl. scripts)
Skills in repo
7
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when preparing a Herald beta release, checking release readiness, or running broad deterministic integration gates across TUI themes, inline images, SSH, and MCP before…

  • Preparing a Herald beta release
  • SKILL.md covers Default Gate, What It Covers, Useful Overrides and Rules
  • Runs Shell scripts from its folder; calls make
  • Checking release readiness

What it does

Pre Release Test is an agent skill from herald-email/herald-mail-app. Use when preparing a Herald beta release, checking release readiness, or running broad deterministic integration gates across TUI themes, inline images, SSH, and MCP before tagging.

Its SKILL.md is about 450 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including scripts (for example `agents/openai.yaml` and `scripts/run_pre_release_gate.sh`).

It sits in Product & Project Management, covering Feature launches and release readiness. It works with Model Context Protocol. The repository describes itself as: Herald is a terminal email client and inbox cleanup tool with IMAP, AI-assisted triage, MCP tools, and SSH/browser-friendly app modes.

When your agent uses it

  • Preparing a Herald beta release
  • Checking release readiness
  • Running broad deterministic integration gates across TUI themes
  • MCP before tagging

Example prompts

  • “/pre-release-test”

Requirements

  • A Bash shell

What it can do on your machine

Read from SKILL.md and the folder at commit b097c04. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Shell), which the agent can run.

    Shell commands in SKILL.md call:

    • make

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Pre Release Test loads about 448 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 184 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~50
When it runs · the whole SKILL.md, loaded when a task matches
~448

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 184 words (~448 tokens).

“Use this skill before cutting a Herald beta or after risky UI/media/theme changes. It is a deterministic demo-data gate and does not touch live IMAP.”

— opening of SKILL.md by herald-email, Custom licence
name
pre-release-test

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (scripts) in .agents/skills/pre-release-test of herald-email/herald-mail-app.

  • SKILL.md
  • agents/openai.yaml
  • scripts/run_pre_release_gate.sh

Open the folder on GitHubat commit b097c04

Compare with similar skills

Pre Release Test next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Pre Release Test compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Pre Release Test this skillherald-email/herald-mail-app144—~448Automated safety check: PassCustom licence
Azsdk Common Prepare Release PlanAzure/azure-sdk-for-android121—~733Automated safety check: PassMIT
Zach Product Researchzach22-1999/amazon-skills2081 repos~9.6kAutomated safety check: NotesMIT
Dogfoodpaiml/aprender127—~13kAutomated safety check: PassMIT
Repo Genomeruvnet/metaharness694—~772Automated safety check: PassMIT
Azsdk Common Prepare Release PlanAzure/azure-sdk-tools134—~2.7kAutomated safety check: PassMIT

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  • Azsdk Common Prepare Release Plan

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  • Zach Product Research

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  • Dogfood

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  • Repo Genome

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  • Release

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Questions about Pre Release Test

What does Pre Release Test do?

A skill your agent uses when preparing a Herald beta release, checking release readiness, or running broad deterministic integration gates across TUI themes, inline images, SSH, and MCP before…. Pre Release Test is an agent skill from herald-email/herald-mail-app. Use when preparing a Herald beta release, checking release readiness, or running broad deterministic integration gates across TUI themes, inline images, SSH, and MCP before tagging.

When should I use Pre Release Test?

Pre Release Test fits situations like: preparing a Herald beta release; checking release readiness; running broad deterministic integration gates across TUI themes; MCP before tagging.

How do I install Pre Release Test in Claude Code?

Run `npx skills add herald-email/herald-mail-app --skill pre-release-test -a claude-code`. Or copy the skill folder (.agents/skills/pre-release-test in herald-email/herald-mail-app) into .claude/skills/pre-release-test in your project. Claude Code loads it when a task matches its description.

How do I install Pre Release Test in Codex?

Run `npx skills add herald-email/herald-mail-app --skill pre-release-test -a codex`. Or copy the skill folder (.agents/skills/pre-release-test in herald-email/herald-mail-app) into .agents/skills/pre-release-test in your project. Codex loads it when a task matches its description.

Can I use Pre Release Test in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add herald-email/herald-mail-app --skill pre-release-test -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pre-release-test, .gemini/skills/pre-release-test, .github/skills/pre-release-test and .opencode/skills/pre-release-test in your project.

What does Pre Release Test need to run?

Going by SKILL.md and its folder, Pre Release Test needs a shell for the scripts in its folder and the command-line tools its instructions call (make). Our summary lists: A Bash shell.

Does Pre Release Test access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Pre Release Test safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Pre Release Test use?

Pre Release Test has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Pre Release Test use?

About 448 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Pre Release Test?

Skills that share tags, products or a category with Pre Release Test: Azsdk Common Prepare Release Plan (Azure/azure-sdk-for-android, 121 stars), Zach Product Research (zach22-1999/amazon-skills, 208 stars), Dogfood (paiml/aprender, 127 stars) and Repo Genome (ruvnet/metaharness, 694 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Pre Release Test?

herald-email (a GitHub organization) maintains it in herald-email/herald-mail-app, which has 144 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on July 13, 2026.

Source: herald-email/herald-mail-app on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.