Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Lord1Egypt/awesome-skill-forge --skill a2a-agent-protocolgit clone --depth 1 https://github.com/Lord1Egypt/awesome-skill-forgeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/lord1egypt/awesome-skill-forge/a2a-agent-protocol)<a href="https://agentmods.dev/skills/lord1egypt/awesome-skill-forge/a2a-agent-protocol"><img src="https://agentmods.dev/badge/skills/lord1egypt/awesome-skill-forge/a2a-agent-protocol/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/lord1egypt/awesome-skill-forge/a2a-agent-protocol"><img src="https://agentmods.dev/badge/skills/lord1egypt/awesome-skill-forge/a2a-agent-protocol.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00096 | $0.03480 |
| Opus 5 | $0.00048 | $0.01740 |
| Sonnet 5 | $0.00019 | $0.00696 |
| Haiku 4.5 | $0.00010 | $0.00348 |
Grade A, and why
a2a-protocol scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
A2A Protocol Skill
An AI agent skill for building, connecting, and operating A2A-compliant agents. This skill is the definitive guide for agents participating in the Agent2Agent protocol ecosystem.
Core Position
This skill is NOT a general API wrapper — it is a protocol education and implementation guide. It teaches agents what A2A is, how to structure AgentCards for discovery, which operations to perform in which order, and how to handle the multi-turn task lifecycle.
This skill is NOT framework-specific. It guides agents regardless of whether they are built with LangGraph, BeeAI, Google ADK, or custom code. The A2A protocol is language-agnostic.
This skill covers the JSON-RPC 2.0 over HTTP binding (the most common) plus key concepts for gRPC and HTTP+REST bindings.
What Problem This Solves
AI agents today operate in silos. Even when they share the same infrastructure, they have no standard way to:
- Discover what capabilities other agents expose
- Send a task to a remote agent and track its lifecycle
- Handle streaming updates or push notifications from a remote agent
- Exchange files, structured data, or multi-part messages
The A2A protocol solves all of the above. This skill makes an AI agent A2A-aware.
Modes
/a2a-protocol
Default mode. Learn A2A concepts, data structures, and operation semantics.
Preferred opening: "The A2A protocol enables agents to discover each other and collaborate without exposing internal state. Here is the protocol overview:"
Use it when:
- The user asks what A2A is, how it works, or why it matters
- You need to explain the difference between A2A and MCP
- You want to understand the AgentCard structure and discovery mechanism
- You need to understand the full task lifecycle (submitted → working → completed)
/a2a-protocol build-card
Generate an AgentCard JSON for the agent. The AgentCard is the public identity document that other agents use to discover capabilities, auth requirements, and connection endpoints.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 306 lines · 96 tokens per session scan A e2a1d1653961
a2a-protocol is a skill published in the GitHub repository Lord1Egypt/awesome-skill-forge (2 stars, last pushed 3mo ago), licensed MIT. It adds 96 tokens to every session and 3,480 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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