Agent skill

Acarshub Socket Namespace

by sdr-enthusiasts in sdr-enthusiasts/docker-acarshub

Use ONLY when working in the docker-acarshub repository AND touching socket.io code -- emit / on / connect calls on either the React frontend or the Fastify backend.

GPL-3.0Auto-check passedDevOps & Cloud

Install Acarshub Socket Namespace

skills CLI

$ npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a claude-code

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

GitHub CLI

$ gh skill install sdr-enthusiasts/docker-acarshub acarshub-socket-namespace --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/sdr-enthusiasts/docker-acarshub.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.opencode/skills/acarshub-socket-namespace .claude/skills/acarshub-socket-namespace && 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/

Paste into Claude Code

Install the "acarshub-socket-namespace" agent skill from https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace into .claude/skills/acarshub-socket-namespace/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "acarshub-socket-namespace", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install sdr-enthusiasts/docker-acarshub acarshub-socket-namespace --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/sdr-enthusiasts/docker-acarshub.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.opencode/skills/acarshub-socket-namespace .agents/skills/acarshub-socket-namespace && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "acarshub-socket-namespace" agent skill from https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace into .agents/skills/acarshub-socket-namespace/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "acarshub-socket-namespace", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install sdr-enthusiasts/docker-acarshub acarshub-socket-namespace --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/sdr-enthusiasts/docker-acarshub.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.opencode/skills/acarshub-socket-namespace .cursor/skills/acarshub-socket-namespace && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "acarshub-socket-namespace" agent skill from https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace into .cursor/skills/acarshub-socket-namespace/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "acarshub-socket-namespace", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/sdr-enthusiasts/docker-acarshub.git --path .opencode/skills/acarshub-socket-namespace

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install sdr-enthusiasts/docker-acarshub acarshub-socket-namespace --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/sdr-enthusiasts/docker-acarshub.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.opencode/skills/acarshub-socket-namespace .gemini/skills/acarshub-socket-namespace && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "acarshub-socket-namespace" agent skill from https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace into .gemini/skills/acarshub-socket-namespace/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "acarshub-socket-namespace", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install sdr-enthusiasts/docker-acarshub acarshub-socket-namespace

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/sdr-enthusiasts/docker-acarshub.git skills-src && mkdir -p .github/skills && cp -r skills-src/.opencode/skills/acarshub-socket-namespace .github/skills/acarshub-socket-namespace && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "acarshub-socket-namespace" agent skill from https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace into .github/skills/acarshub-socket-namespace/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "acarshub-socket-namespace", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install sdr-enthusiasts/docker-acarshub acarshub-socket-namespace --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/sdr-enthusiasts/docker-acarshub.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.opencode/skills/acarshub-socket-namespace .opencode/skills/acarshub-socket-namespace && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "acarshub-socket-namespace" agent skill from https://github.com/sdr-enthusiasts/docker-acarshub/tree/main/.opencode/skills/acarshub-socket-namespace into .opencode/skills/acarshub-socket-namespace/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "acarshub-socket-namespace", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: acarshub-socket-namespace
GitHub stars: 117
Token cost: ~710 tokens
SKILL.md length: 276 words
Files: 1
Skills in repo: 3
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: GPL-3.0

At a glance

Use ONLY when working in the docker-acarshub repository AND touching socket.io code -- emit / on / connect calls on either the React frontend or the Fastify backend.

Tasks that involve Realtime and WebSockets
SKILL.md covers The pitfall, Events at a glance and When to stop and ask
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Tasks that involve Containers

What it does

Acarshub Socket Namespace is an agent skill from sdr-enthusiasts/docker-acarshub. Use ONLY when working in the docker-acarshub repository AND touching socket.io code -- emit / on / connect calls on either the React frontend or the Fastify backend. Codifies the /main namespace binding that's done at construction time and the historical Flask-SocketIO-quirk pitfall: do NOT pass "/main" as an extra argument to socket.emit(...) calls.

Its SKILL.md is about 710 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in DevOps & Cloud, covering Realtime and WebSockets and Containers. It works with Docker, Flask, Fastify and React. The repository describes itself as: Docker container to utilize RTLSDR dongle(s) to view/stream ACARS/VDLM2 aircraft data transmissions. The licence is GPL-3.0.

When your agent uses it

Tasks that involve Realtime and WebSockets
Tasks that involve Containers

Example prompts

“/acarshub-socket-namespace”

Requirements

Python 3
Docker

What it can do on your machine

Read from SKILL.md and the folder at commit 862da2a. 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 typescript).
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

Acarshub Socket Namespace loads about 710 tokens when it runs. Until then it costs about 96 tokens; SKILL.md has 276 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~96
When it runs · the whole SKILL.md, loaded when a task matches: ~710

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 sdr-enthusiasts/docker-acarshub at commit 862da2a, republished under its GPL-3.0 licence (© sdr-enthusiasts). 276 words, ~710 tokens.

Download SKILL.mdSave it as .claude/skills/acarshub-socket-namespace/SKILL.md (or your agent's skills folder).

name: acarshub-socket-namespace
description: Use ONLY when working in the docker-acarshub repository AND touching socket.io code -- emit / on / connect calls on either the React frontend or the Fastify backend. Codifies the `/main` namespace binding that's done at construction time and the historical Flask-SocketIO-quirk pitfall: do NOT pass `"/main"` as an extra argument to `socket.emit(...)` calls.

ACARS Hub: Socket.IO `/main` namespace is bound at construction

The frontend connects to the /main namespace at construction time:

typescript

const socket = io(`${origin}/main`, { ... });

The backend binds handlers via io.of("/main"). Once the constructor URL includes the namespace, all subsequent socket.emit(...) and socket.on(...) calls implicitly use it.

The pitfall

Do NOT pass "/main" as an extra argument to emits:

typescript

// Wrong -- the extra "/main" is silently consumed as a 2nd handler param
//         a future handler that adds a second parameter would silently
//         consume it and the bug would be invisible.
socket.emit("query_search", payload, "/main");

// Right
socket.emit("query_search", payload);

This pattern was a quirk of the Flask-SocketIO Python client that lived in the old Python backend. When the backend was ported to Node Socket.IO v4 (in tasks TYPE-01 / TYPE-02; commit pinned in agent-docs/REMEDIATION_PLAN.md), the trailing "/main" arguments became dead-but-harmless code. They were removed during that port. Do not re-introduce them, including in copy-pasted examples from older agent sessions, old git history, or documentation that predates the port.

Events at a glance

Backend -> frontend (frontend socket.on(...)):

acars_msg -- new ACARS message
adsb_aircraft -- ADS-B aircraft positions
system_status -- backend health status
terms -- alert term updates
database_search_results -- search results

Frontend -> backend (frontend socket.emit(...)):

query_search -- database search request
update_alerts -- update alert terms
request_status -- request system status

Full event catalogue (with payload shapes) is the responsibility of the typed acarshub-types package. When adding an event, add it there first, then on both ends.

When to stop and ask

A new event is needed that doesn't fit the existing patterns (e.g. a binary stream rather than a JSON-serialisable event). Surface the design choice before inventing a transport.
The event would push a payload over the Socket.IO default frame size. Confirm whether to bump the frame size or split the payload.
A handler genuinely needs to consume more than one positional parameter (very rare in Socket.IO v4 patterns). Stop -- this is exactly where the legacy "/main" arg becomes a real bug.

Files

Just SKILL.md in .opencode/skills/acarshub-socket-namespace of sdr-enthusiasts/docker-acarshub.

Open the folder on GitHubat commit 862da2a

Compare with similar skills

Acarshub Socket Namespace 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.

Acarshub Socket Namespace compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Acarshub Socket Namespace this skillsdr-enthusiasts/docker-acarshub	117	—	~710	Automated safety check: Pass	GPL-3.0	yesterday
Code PatternsAedelon/claude-code-blueprint	120	—	~1.2k	Automated safety check: Pass	Custom licence	7 mo ago
Web Ng Docker Loopcarverauto/serviceradar	921	—	~737	Automated safety check: Pass	Apache-2.0	today
Tgf Server Devthkhxm/tgf	128	—	~1.3k	Automated safety check: Notes	MIT	2 mo ago
Docker Containerizationailabs-393/ai-labs-claude-skills	454	—	~2.1k	Automated safety check: Notes	MIT	11 mo ago
Modern Web GuidanceJetBrains/skills	366	3 repos	~1.4k	Automated safety check: Pass	Apache-2.0	3 mo ago

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Works with

Questions about Acarshub Socket Namespace

What does Acarshub Socket Namespace do?

Use ONLY when working in the docker-acarshub repository AND touching socket.io code -- emit / on / connect calls on either the React frontend or the Fastify backend. Acarshub Socket Namespace is an agent skill from sdr-enthusiasts/docker-acarshub.io code -- emit / on / connect calls on either the React frontend or the Fastify backend.

When should I use Acarshub Socket Namespace?

Acarshub Socket Namespace fits situations like: tasks that involve Realtime and WebSockets; tasks that involve Containers.

How do I install Acarshub Socket Namespace in Claude Code?

Run `npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a claude-code`. Or copy the skill folder (.opencode/skills/acarshub-socket-namespace in sdr-enthusiasts/docker-acarshub) into .claude/skills/acarshub-socket-namespace in your project. Claude Code loads it when a task matches its description.

How do I install Acarshub Socket Namespace in Codex?

Run `npx skills add sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a codex`. Or copy the skill folder (.opencode/skills/acarshub-socket-namespace in sdr-enthusiasts/docker-acarshub) into .agents/skills/acarshub-socket-namespace in your project. Codex loads it when a task matches its description.

Can I use Acarshub Socket Namespace 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 sdr-enthusiasts/docker-acarshub --skill acarshub-socket-namespace -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/acarshub-socket-namespace, .gemini/skills/acarshub-socket-namespace, .github/skills/acarshub-socket-namespace and .opencode/skills/acarshub-socket-namespace in your project.

What does Acarshub Socket Namespace need to run?

SKILL.md names no scripts, command-line tools or credentials: Acarshub Socket Namespace is instructions for the agent only. Our summary lists: Python 3; Docker.

Does Acarshub Socket Namespace 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 Acarshub Socket Namespace 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 Acarshub Socket Namespace use?

Acarshub Socket Namespace is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Acarshub Socket Namespace use?

About 710 tokens (SKILL.md is roughly 2.8k 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 Acarshub Socket Namespace?

Skills that share tags, products or a category with Acarshub Socket Namespace: Code Patterns (Aedelon/claude-code-blueprint, 120 stars), Web Ng Docker Loop (carverauto/serviceradar, 921 stars), Tgf Server Dev (thkhxm/tgf, 128 stars) and Docker Containerization (ailabs-393/ai-labs-claude-skills, 454 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Acarshub Socket Namespace?

sdr-enthusiasts (a GitHub organization) maintains it in sdr-enthusiasts/docker-acarshub, which has 117 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 7, 2026.

Source: sdr-enthusiasts/docker-acarshub on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Acarshub Socket Namespace

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

ACARS Hub: Socket.IO /main namespace is bound at construction

The pitfall

Events at a glance

When to stop and ask

Files

Compare with similar skills

Similar skills

More from sdr-enthusiasts/docker-acarshub

Related

Questions about Acarshub Socket Namespace

ACARS Hub: Socket.IO `/main` namespace is bound at construction