adolfousier/opencrabs · src/docs/reference/templates/skills/a2a-gateway/SKILL.md

a2a-gateway skillB

a2a-gateway is agent-read markdown (skill) from adolfousier/opencrabs: Agent-to-Agent (A2A) protocol gateway reference. JSON-RPC 2.0 peer-to-peer agent communication. (/a2a-gateway, a2a, agent protocol).

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 adolfousier/opencrabs/a2a-gateway@git:20260503.68c0c2a
Exact content
mdr add adolfousier/opencrabs/a2a-gateway@sha256:ba5aa84db99f0f68

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_efzkhskprinn5qle.svg)](https://markdownregistry.com/a/art_efzkhskprinn5qle)

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Versions

versioncommittedcommitsizeaudit
git:20260503.68c0c2a latest2026-05-03 68c0c2a 1,380 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No link to a raw IP address (matched: http://127.0.0.1:18790)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (1380 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 script tag

Source

GitHub

adolfousier/opencrabs · 939 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_efzkhskprinn5qle
GET https://markdownregistry.com/api/v1/resolve?ref=adolfousier/opencrabs/a2a-gateway
GET https://markdownregistry.com/api/v1/blob/ba5aa84db99f0f684322c9c47d41a54b4f395089a5e7762de6912538c884da7d

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.