Claude Code Skills·Claude Skills·The open SKILL.md registry for Claude
ClaudSkills / General / general-misc

Mailbox

Category: General  ·  Sub-category: general-misc  ·  Last updated:
Pure-filesystem inter-agent mailbox so any agent session can send a handoff document to another and pick up replies. Use when you need to set up your mailbox, send or reply to another agent, check for or wait on incoming messages, resolve another agent by name, take over / claim an existing mailbox identity (e.g. "take over Alice's mailbox"), or prune stale mailboxes from the registry. The fabric beneath the spawn, handback, and dispatch skills.

About this skill (catalog notes)

Mailbox includes at least one code block. The SKILL.md is on the shorter side at about 372 words.

License
MIT
Original author
fuzzyfox
Indexed lastmod
Catalog position
General · general-misc
Indexed related skills
10

How Mailbox fits the catalog

Mailbox sits in the General category under the general-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

A pure-filesystem return channel between agent sessions. No daemon, no network, no harness-specific transport. Each session owns an inbox (a directory); a message is a handoff document with a tiny YAML envelope carrying a return address. Delivery is solved completely by the filesystem; wake-up is solved by whose turn is open (the wait flow).

. "<this skill's path>/scripts/mailbox.sh"

What this skill does

Mailbox is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/mailbox/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when you need to set up your mailbox, send or reply to another agent, check for or wait on incoming messages, resolve another agent by name, take over / claim an existing mailbox identity (e.g.

Who uses this skill

The Mailbox Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 119,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/mailbox
curl -L https://claudskills.com/skills/mailbox/SKILL.md \
  -o ~/.claude/skills/mailbox/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/mailbox/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/mailbox/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\mailbox\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Mailbox Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/mailbox/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Mailbox skill do?
Pure-filesystem inter-agent mailbox so any agent session can send a handoff document to another and pick up replies. Use when you need to set up your mailbox, send or reply to another agent, check for or wait on incoming messages, resolve another agent by name, take over / claim an existing mailbox identity (e.g. "take over Alice's mailbox"), or prune stale mailboxes from the registry. The fabric beneath the spawn, handback, and dispatch skills.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Mailbox skill?
Use Mailbox when your Claude Code task falls under the General category — specifically in the general misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Mailbox" or describe the task and let Claude pick). Browse related skills at /category/general/.
What is a Claude Code skill and how does the Mailbox skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Mailbox is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
fuzzyfox. (2026). Mailbox [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/mailbox/
BibTeX
@misc{mailbox-2026,
  author    = {fuzzyfox},
  title     = {Mailbox [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/mailbox/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge
[![ClaudSkills](https://claudskills.com/badge/mailbox.svg)](https://claudskills.com/skills/mailbox/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/mailbox.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/mailbox.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Mailbox"></iframe>

Free. No spam. Unsubscribe in one click.

More General skills

Browse all General skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all General skills → Top 100 skills
Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore

Categories

Use cases

Popular tags

Learn

Site