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A0

io.github.Joe-Simo/a0

Source code

About A0

A0 is an MCP server published by the GitHub account Joe-Simo. Write, check, run and compile A0 programs through revision-checked structured edits.

It runs on your own machine: your AI client starts it from the MCP bundle package a0-mcp-darwin-arm64.mcpb, with no version pinned.

It asks for no keys or passwords.

Version 0.8.16 was published on 1 October 2026, and the source code is public, so you can read it before installing.

Written from the registry entry. 7 automated checks on registry metadata: 3 pass, 1 warn, 0 fail, 3 info. How we check.

What it asks for

This server declares no environment variables, so it asks for no keys or settings.

Checks

CheckResultDetail
Source repository linkedPasshttps://github.com/Joe-Simo/a0
Version pinnedWarnNot pinned: https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-darwin-arm64.mcpb, https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-darwin-x64.mcpb, https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-linux-x64.mcpb, https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-linux-arm64.mcpb, https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-windows-x64.mcpb
Secrets requestedInfoAsks for no secrets
Known package registryPassAll packages come from npm, PyPI, OCI, NuGet or MCPB
Namespace ownershipInfoName verified via GitHub account Joe-Simo
Registry text aimed at the AIPassDescription and settings contain no hidden characters or instructions to the AI
Code red flagsInfoPackage could not be read (too large)

Popularity & health: 43 / 100

Worked out from public numbers and our own checks, not from user reviews or ratings. It says how used and how looked-after a server is, not whether it is safe.

Popularity4 / 40

2 GitHub stars, no download count, no Hacker News posts found. Best two of the three, each on a log scale.

Activity15 / 25

Last push 2026-10-18, last release 2026-10-01, 0 commits in 90 days.

Issue health8 / 15

0 closed of 0 issues, too few to judge. No data, so half marks.

Our checks16 / 20

1 warning, each costing a fifth.

0 forks, 16 merged pull requests. Sources: GitHub, npm, PyPI (pypistats.org) and Hacker News (Algolia), fetched 2026-10-31.

What people say

No Hacker News threads link to its source code.

Look further: search Reddit, search Hacker News, read its GitHub issues. These are not reviews we checked.

Facts

Registry nameio.github.Joe-Simo/a0
PublisherGitHub account Joe-Simo
How the name is verifiedName verified via GitHub account Joe-Simo. The registry ties the name prefix to that account or domain; it does not check the code.
TypeLocal: runs on your machine from a package
Packagesmcpb https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-darwin-arm64.mcpb no version given (stdio)
mcpb https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-darwin-x64.mcpb no version given (stdio)
mcpb https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-linux-x64.mcpb no version given (stdio)
mcpb https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-linux-arm64.mcpb no version given (stdio)
mcpb https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-windows-x64.mcpb no version given (stdio)
Version0.8.16
Published
Last updated
Source repositoryhttps://github.com/Joe-Simo/a0
Websitehttps://a0lang.com
CategoryOther (assigned by keyword rule, not by hand)

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