New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Official agent skill

Verify Prerelease Altool

by microsoft in microsoft/AL

Verifies that the workflow-installed public prerelease ALTool is the executable used for every reproduction command.

OfficialMITAuto-check passed

Install Verify Prerelease Altool

skills CLI
$ npx skills add microsoft/AL --skill verify-prerelease-altool -a claude-code

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

GitHub CLI
$ gh skill install microsoft/AL verify-prerelease-altool --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/microsoft/AL.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.github/skills/verify-prerelease-altool .claude/skills/verify-prerelease-altool && 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
verify-prerelease-altool
GitHub stars
884
Token cost
~170 tokens
SKILL.md length
21 words
Files
1
Skills in repo
9
Repo updated
First seen
Licence
MIT

At a glance

Verifies that the workflow-installed public prerelease ALTool is the executable used for every reproduction command.

  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Verify Prerelease Altool is an agent skill from microsoft/AL, published by the product's own GitHub organization. Verifies that the workflow-installed public prerelease ALTool is the executable used for every reproduction command.

Its SKILL.md is about 170 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Home of the Dynamics 365 Business Central AL Language extension for Visual Studio Code. Used to track issues regarding the latest version of the AL compiler and developer tools… The licence is MIT.

Example prompts

  • “Use the verify-prerelease-altool skill to verify that the workflow-installed public prerelease ALTool is the executable used for every reproduction…”
  • “/verify-prerelease-altool”

What it can do on your machine

Read from SKILL.md and the folder at commit 872adad. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are powershell).

    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

Verify Prerelease Altool loads about 170 tokens when it runs. Until then it costs about 35 tokens; SKILL.md has 21 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~35
When it runs · the whole SKILL.md, loaded when a task matches
~170

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from microsoft/AL at commit 872adad, republished under its MIT licence (© microsoft). 21 words, ~170 tokens.

Download SKILL.mdSave it as .claude/skills/verify-prerelease-altool/SKILL.md (or your agent's skills folder).
name
verify-prerelease-altool
description
Verifies that the workflow-installed public prerelease ALTool is the executable used for every reproduction command.

Resolve ALTool only from ALTOOL_PATH, then verify it matches ALTOOL_VERSION:

powershell
$altool = $env:ALTOOL_PATH
if (-not (Test-Path -LiteralPath $altool -PathType Leaf)) {
    throw "Prerelease ALTool not found: $altool"
}
$actualVersion = (& $altool --version 2>&1 | Out-String).Trim()
if ($actualVersion -ne $env:ALTOOL_VERSION) {
    throw "Expected ALTool '$env:ALTOOL_VERSION', got '$actualVersion'."
}

Do not use a repository-built, globally cached, or separately downloaded executable.

© microsoft, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .github/skills/verify-prerelease-altool of microsoft/AL.

Open the folder on GitHubat commit 872adad

Compare with similar skills

Verify Prerelease Altool 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.

Verify Prerelease Altool compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Verify Prerelease Altool this skillmicrosoft/AL884—~170Automated safety check: PassMIT
Verifyasgeirtj/system_prompts_leaks69k—~3kAutomated safety check: PassCC0-1.0
Verify Thiscursor/plugins10k2 repos~693Automated safety check: PassNone
Verify Releaseopenclaw/openclaw392k—~2.4kAutomated safety check: PassMIT
Generating Python Installeraffaan-m/ECC275k1 repos~6.1kAutomated safety check: PassMIT
Verifycodewhale-hq/Codewhale41k—~156Automated safety check: PassMIT

Similar skills

  • Verify

    asgeirtj/system_prompts_leaks

    Verify that a code change actually does what it's supposed to by exercising it end-to-end and observing behavior — drive the affected flow, not just tests or typecheck.

    69k GitHub stars~3k tokensUpdated today
    Testing & QAAuto-check passed

  • Verify This

    cursor/plugins

    Official

    Verify a claim with fresh local evidence: restate it falsifiably, capture baseline and treatment, compare artifacts, and return VERIFIED, NOT VERIFIED, or INCONCLUSIVE.

    10k GitHub starsUsed in 2 repos~693 tokens
    Auto-check passed

  • Verify Release

    openclaw/openclaw

    Verify regular or extended-stable OpenClaw releases against the exact publication surfaces, workflow identities, package provenance, smoke tests, and live Gateway behavior expected for that release…

    392k GitHub stars~2.4k tokensUpdated today
    Testing & QAAuto-check passed

  • Generating Python Installer

    affaan-m/ECC

    Commercial-grade Python installer expert for Windows: Nuitka extreme compilation, dist slimming, DLL footprint analysis, and Inno Setup packaging to ship the smallest, fastest installers.

    275k GitHub starsUsed in 1 repo~6.1k tokens
    Testing & QAAuto-check passed

  • Verify

    codewhale-hq/Codewhale

    Exercise the real app/API/CLI and collect observable evidence; tests alone do not count as end-to-end verification.

    41k GitHub stars~156 tokensUpdated today
    Testing & QAAuto-check passed

  • Verify Before Completion

    Yeachan-Heo/oh-my-claudecode

    Has the agent prove that a feature, fix or refactor works, using existing tests first, then narrow commands and manual checks, and report only what was actually verified.

    40k GitHub stars~277 tokensUpdated today
    Agent WorkflowsAuto-check passed

More from microsoft/AL

All 9 skills in this repo

  • Download Al Symbols

    microsoft/AL

    Official

    Downloads exact Business Central symbol packages for a temporary AL reproduction project through the installed prerelease ALTool.

    884 GitHub stars~273 tokensUpdated 22 days ago
    Auto-check passed

  • Publish Al App

    microsoft/AL

    Official

    Publishes one compiled AL app to the provisioned BCInsider sandbox through the public prerelease ALTool.

    884 GitHub stars~221 tokensUpdated 22 days ago
    Auto-check passed

  • Run Al Code Analysis

    microsoft/AL

    Official

    Runs CodeCop, PerTenantExtensionCop, UICop, or AppSourceCop against a temporary project through the public prerelease ALTool.

    884 GitHub stars~302 tokensUpdated 22 days ago
    Auto-check passed

  • Run Al MCP Tool

    microsoft/AL

    Official

    Invokes one safe AL MCP tooling operation through the workflow-installed prerelease ALTool for independent reproduction of MCP and editor-tooling issues.

    884 GitHub stars~310 tokensUpdated 22 days ago
    Auto-check passed

  • Run Al Tests

    microsoft/AL

    Official

    Runs a published AL test codeunit against the provisioned BCInsider sandbox through the public prerelease ALTool.

    884 GitHub stars~208 tokensUpdated 22 days ago
    Auto-check passed

  • Compile Al App

    microsoft/AL

    Official

    Compiles a temporary AL project through the workflow-installed public prerelease ALTool and verifies that a fresh app package was emitted.

    884 GitHub stars~164 tokensUpdated 22 days ago
    Auto-check passed

Questions about Verify Prerelease Altool

What does Verify Prerelease Altool do?

Verifies that the workflow-installed public prerelease ALTool is the executable used for every reproduction command. Verify Prerelease Altool is an agent skill from microsoft/AL, published by the product's own GitHub organization. Verifies that the workflow-installed public prerelease ALTool is the executable used for every reproduction command.

How do I install Verify Prerelease Altool in Claude Code?

Run `npx skills add microsoft/AL --skill verify-prerelease-altool -a claude-code`. Or copy the skill folder (.github/skills/verify-prerelease-altool in microsoft/AL) into .claude/skills/verify-prerelease-altool in your project. Claude Code loads it when a task matches its description.

How do I install Verify Prerelease Altool in Codex?

Run `npx skills add microsoft/AL --skill verify-prerelease-altool -a codex`. Or copy the skill folder (.github/skills/verify-prerelease-altool in microsoft/AL) into .agents/skills/verify-prerelease-altool in your project. Codex loads it when a task matches its description.

Can I use Verify Prerelease Altool 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 microsoft/AL --skill verify-prerelease-altool -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/verify-prerelease-altool, .gemini/skills/verify-prerelease-altool, .github/skills/verify-prerelease-altool and .opencode/skills/verify-prerelease-altool in your project.

What does Verify Prerelease Altool need to run?

SKILL.md names no scripts, command-line tools or credentials: Verify Prerelease Altool is instructions for the agent only.

Does Verify Prerelease Altool 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 Verify Prerelease Altool 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. Review the folder before installing.

What licence does Verify Prerelease Altool use?

Verify Prerelease Altool is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Verify Prerelease Altool use?

About 170 tokens (SKILL.md is roughly 680 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 Verify Prerelease Altool?

Skills that share tags, products or a category with Verify Prerelease Altool: Verify (asgeirtj/system_prompts_leaks, 69k stars), Verify This (cursor/plugins, 10k stars), Verify Release (openclaw/openclaw, 392k stars) and Generating Python Installer (affaan-m/ECC, 275k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Verify Prerelease Altool?

microsoft (a GitHub organization, an official publisher) maintains it in microsoft/AL, which has 884 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on September 16, 2026.

Source: microsoft/AL on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.