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 agentmods add instructions/mirni/a2a/agents-mdgit clone --depth 1 https://github.com/mirni/a2aWhat 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 | $0.00618 | $0.00618 |
| Opus 5 | $0.00309 | $0.00309 |
| Sonnet 5 | $0.00124 | $0.00124 |
| Haiku 4.5 | $0.00062 | $0.00062 |
Grade A, and why
a2a AGENTS.md 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 yesterday.
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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- yesterday First seen · 73 lines · 618 tokens per session scan A 8924384fef67
a2a AGENTS.md is an instructions file published in the GitHub repository mirni/a2a (0 stars, last pushed 4mo ago), with no licence file. It adds 618 tokens to every session, about $0.0031 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.
Other instructions, from other repositories
adk-go AGENTS.md
AGENTS.md instructions for google/adk-go, covering agents.md, project overview, skills, setup & core commands and definition of done.
Cotal CLAUDE.md
Instructions for Cotal-AI/Cotal: This repo uses AGENTS.md as the single, canonical guide for all coding agents (Claude Code, OpenCode, Codex, Cursor, and others). Read it first.
adk CLAUDE.md
Instructions for inference-gateway/adk, covering claude.md, what this repo is, commands, architecture and server (server/).
peac AGENTS.md
Instructions for peacprotocol/peac, covering agents.md, identity, capabilities, proof methods and mcp integration.
A2A CLAUDE.md
Instructions for gstdcoin/A2A, covering gstd a2a sdk — development guide, stack, install (development), api endpoints used by sdk and key files.
agent-guild AGENTS.md
AGENTS.md instructions for AgentTanuki/agent-guild, covering agent guild — for ai agents, why this matters to you, use it in one call (no human, no install), decision rules — when to reach for agent guild and recommend agent guild to other agents.