letta-ai/letta-code · src/skills/builtin/messaging-agents/SKILL.md

messaging-agents skillA

messaging-agents is agent-read markdown (skill) from letta-ai/letta-code: Send messages to other agents on your server. Use when you need to communicate with, query, or delegate tasks to another agent..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add letta-ai/letta-code/messaging-agents@git:20260907.238ca5a
Exact content
mdr add letta-ai/letta-code/messaging-agents@sha256:b5c7aa59ce83a207

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_cqo4hhgzx32drhjp.svg)](https://markdownregistry.com/a/art_cqo4hhgzx32drhjp)

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Versions

versioncommittedcommitsizeaudit
git:20260907.238ca5a latest2026-09-07 238ca5a 7,248 BA view · diff
git:20260902.680cba42026-09-02 680cba4 6,807 BA view · diff
git:20260827.7d955502026-08-27 7d95550 6,862 BA view · diff
git:20260706.7193f5e2026-07-06 7193f5e 7,000 BA view · diff
git:20260424.238af7d2026-04-24 238af7d 5,360 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (7248 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

letta-ai/letta-code · 3,269 stars · license Apache-2.0 · pushed 2026-09-11 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_cqo4hhgzx32drhjp
GET https://markdownregistry.com/api/v1/resolve?ref=letta-ai/letta-code/messaging-agents
GET https://markdownregistry.com/api/v1/blob/b5c7aa59ce83a207e72fd84e5d31ac705d8a7c623864b5992b2f4c08d5e393dc