Claude Code mod

agent-mailbox

Mailboxes for Claude sessions: names, cross-profile messages that wake idle sessions, and a band with your account, context, and plan limits.

2 starsContext & usage modsValidates on Claude Code 2.1.316 Source

Install

From source

git clone https://github.com/charanjit-singh/ClaudeVsCodeMinimal.git
claude --plugin-dir ./ClaudeVsCodeMinimal/mod/agent-mailbox

The repo has no marketplace file, so load the plugin folder directly with --plugin-dir.

What it can access

Reach: L2Writes or runs: runs processes, drives Claude, reads files, reads env vars, reads mod state, draws
Sees: every prompt, mcp__agent-mailbox__list_peers calls, mcp__agent-mailbox__send_message calls, mcp__agent-mailbox__read_messages calls, mcp__agent-mailbox__set_label calls, mcp__agent-mailbox__list_mailboxes calls, mcp__agent-mailbox__create_mailbox calls, mcp__agent-mailbox__select_mailbox calls, mcp__agent-mailbox__leave_mailbox calls
Draws in: AbovePrompt
Hooks: session.startprompt.submitturn.completesession.measuresession.endtool.callcommand.runui.render

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.

Claude Code docs

Details

Repository: charanjit-singh/ClaudeVsCodeMinimal
Folder: mod/agent-mailbox
Author: Charanjit Singh
Type: Context & usage mods
Last updated: 9 October 2026
Listed in: awesome-claude-code-mods

FAQ

What is agent-mailbox?

Mailboxes for Claude sessions: names, cross-profile messages that wake idle sessions, and a band with your account, context, and plan limits. It is a mod for Claude Code, from charanjit-singh/ClaudeVsCodeMinimal on GitHub.

What can the agent-mailbox mod access?

Its widest reach is "writes or runs" (runs processes, drives Claude, reads files, reads env vars, reads mod state, draws). It sees every prompt, mcp__agent-mailbox__list_peers calls, mcp__agent-mailbox__send_message calls, mcp__agent-mailbox__read_messages calls, mcp__agent-mailbox__set_label calls, mcp__agent-mailbox__list_mailboxes calls, mcp__agent-mailbox__create_mailbox calls, mcp__agent-mailbox__select_mailbox calls, mcp__agent-mailbox__leave_mailbox calls. It draws in AbovePrompt. Like any mod, it runs with your permissions.

How do I install agent-mailbox?

Clone charanjit-singh/ClaudeVsCodeMinimal and start Claude Code with --plugin-dir pointing at the mod's folder (mod/agent-mailbox).

Is agent-mailbox popular?

charanjit-singh/ClaudeVsCodeMinimal has 2 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 9 October 2026.

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