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parasxos/postbag

by Various

Two local coding-agent sessions, Claude Code or Codex, write letters to each other through each agent's native input. CLI and MCP tools, stdlib core, no daemon.

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parasxos/postbag

Added 18 Oct 2026

#agent-communication#ai-agents#automation#claude#claude-code#cli#codex#developer-tools
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Overview

Postbag lets two local coding-agent sessions, Claude Code or Codex, exchange letters through each agent's native input. It provides CLI and MCP tools with a stdlib core and no daemon.

Best for

Best for
Developers experimenting with multi-agent workflows locally

Use cases

  • Coordinate two agent sessions on a shared task
  • Pass context or instructions between Claude Code and Codex
  • Orchestrate agent handoffs without a background service

Notes

11 stars on GitHub. Last updated 2026-10-03. Licensed MIT.

Pros

  • Simple stdlib-only core
  • No daemon to manage
  • Works with native agent inputs

Cons

  • Limited to two sessions
  • Requires both agents to be local
  • Small project with few stars (11)
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