a2a-messages-parts SKILL.md skillA
a2a-messages-parts from orcaqubits/agentic-commerce-skills-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add orcaqubits/agentic-commerce-skills-plugins/a2a-messages-parts@git:20260309.786511cPins git:20260309.786511c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- orcaqubits/agentic-commerce-skills-plugins
- Path
a2a-multi-agent/skills/a2a-messages-parts/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260309.786511c, committed Mar 9, 2026
- Size
- 3,789 bytes
- Repository stars
- 40
- License
- MIT
Implement A2A messages and parts — TextPart, FilePart, DataPart, message roles, metadata, and content negotiation. Use when building message construction, parsing, or content type handling in A2A agents.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# A2A Messages and Parts ## Before writing code **Fetch live docs**: 1. Fetch `https://a2a-protocol.org/latest/specification/` for the Message and Part schemas 2. Web-search `site:github.com a2aproject A2A message parts TextPart FilePart DataPart` for schema details 3. Web-search `site:github.com a2aproject a2a-samples message` for message construction examples 4. Fetch SDK docs for message builder classes and part types ## Conceptual Architecture ### What Messages Are Messages are the **communication units** between agents in A2A. Each message belongs to a task and contains one or more Parts that carry the actual content. Messages have roles indicating direction. ### Message Structure - **role** — `user` (from client agent) or `agent` (from server agent) - **parts** — Array of Part objects (the actual content) - **metadata** — Optional key-value pairs for custom data ### Three Part Types #### TextPart Plain text or markdown content. - **kind**: `"text"` - **text**: The text content string - **metadata**: Optional key-value pairs Use for: Natural language instructions, responses, explanations, formatted output. #### FilePart File content, either inline or by reference. …
Read the whole file at its exact version.
How to install
mdr add orcaqubits/agentic-commerce-skills-plugins/a2a-messages-parts@sha256:ac63fec2b8121eacThe line at the top of this page pins the label git:20260309.786511c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_3ffxdrmgtjqr7n67)
7 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 9, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3789 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
orcaqubits/agentic-commerce-skills-plugins · 40 stars · license MIT · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3ffxdrmgtjqr7n67 GET https://markdownregistry.com/api/v1/resolve?ref=orcaqubits/agentic-commerce-skills-plugins/a2a-messages-parts GET https://markdownregistry.com/api/v1/blob/ac63fec2b8121eac17fd2d95b5a014640f7338b0cd87c086ef83a68d1ba2006f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.