pjt222/agent-almanac · i18n/caveman-lite/skills/implement-a2a-server/SKILL.md

implement-a2a-server skillA

implement-a2a-server is agent-read markdown (skill) from pjt222/agent-almanac: Implement a JSON-RPC 2.0 A2A server with full task lifecycle management (submitted/working/completed/failed/canceled/input-required), SSE streaming, and push notifications. Use when implementing an agent that participates in multi-agent A2A workflows, building a backend for an Agent Card, adding A2A protocol support to an existing agent or service, or deploying an agent that must interoperate with other A2A-compliant agents..

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 pjt222/agent-almanac/implement-a2a-server@v1.0
Exact content
mdr add pjt222/agent-almanac/implement-a2a-server@sha256:0a557fb0e05a28df

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_tlyt4fw7l4l5vuyi.svg)](https://markdownregistry.com/a/art_tlyt4fw7l4l5vuyi)

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Versions

versioncommittedcommitsizeaudit
v1.0 latest2026-08-17 a784899 16,209 BA view · diff
v1.02026-06-05 33b561c 16,180 BA view · diff
v1.02026-04-24 b4968e1 16,176 BA view · diff
v1.02026-04-19 e334ebd 16,238 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 (16209 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

pjt222/agent-almanac · 33 stars · license MIT · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_tlyt4fw7l4l5vuyi
GET https://markdownregistry.com/api/v1/resolve?ref=pjt222/agent-almanac/implement-a2a-server
GET https://markdownregistry.com/api/v1/blob/0a557fb0e05a28df8a3bbfbd6eadb37d3dd3cefed567ce9307b1c65a7d1a7f4b

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