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/a2aproject/a2a-java/agents-mdgit clone --depth 1 https://github.com/a2aproject/a2a-javaWhat 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 | $0.01815 | $0.01815 |
| Opus 5 | $0.00907 | $0.00907 |
| Sonnet 5 | $0.00363 | $0.00363 |
| Haiku 4.5 | $0.00181 | $0.00181 |
Grade A, and why
a2a-java 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.
How it starts
The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Project Overview
Java SDK for the Agent2Agent (A2A) Protocol. Multi-module Maven project (org.a2aproject.sdk group) providing client and server libraries for A2A agent communication over JSON-RPC, gRPC, and REST transports.
Build
Requires Java 17+. Tests output is redirected to files by default.
mvn clean install
Project Structure
spec/— A2A specification types (Java records for the protocol)spec-grpc/— gRPC protobuf definitions and generated classescommon/— Shared utilities used across modulesclient/— Client SDKbase/— Core client APItransport/spi/— Transport SPItransport/jsonrpc/,transport/grpc/,transport/rest/— Transport implementations
server-common/— Server-side core (AgentExecutor, TaskStore, QueueManager)transport/— Server transport layer (jsonrpc, grpc, rest)http-client/— HTTP client abstractionjsonrpc-common/— Shared JSON-RPC utilitiesreference/— Reference server implementations built on Quarkuscommon/,jsonrpc/,grpc/,rest/multiversion-jsonrpc/,multiversion-rest/— Multi-version dispatching (v1.0 + v0.3)
tck/— Technology Compatibility Kit (protocol conformance tests)tests/— Integration and server-common testsserver-common/— Server-common integration testsmultiversion/— Multi-version integration tests (jsonrpc, rest, grpc)
extras/— Optional add-onscommon/— Shared classes across extras modulesopentelemetry/— OpenTelemetry integrationtask-store-database-jpa/— JPA-backed task storepush-notification-config-store-database-jpa/— JPA-backed push notification config storequeue-manager-replicated/— Kafka-based replicated queue managerhttp-client-vertx/— Vert.x HTTP clienthttp-client-android/— Android HTTP client
compat-0.3/— Backward compatibility layer for A2A protocol v0.3integrations/— Runtime integrations (e.g., MicroProfile Config)test-utils-docker/— Test utilities for conditional Docker-based test executionboms/— Bill of Materials POMs (sdk, extras, reference, test-utils)examples/— Sample applications (helloworld, cloud-deployment)
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 · 132 lines · 1,815 tokens per session scan A b15c2fbfa073
a2a-java AGENTS.md is an instructions file published in the GitHub repository a2aproject/a2a-java (481 stars, last pushed 4d ago), licensed Apache-2.0. It adds 1,815 tokens to every session, about $0.0091 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 2026-08-30.
Other instructions, from other repositories
codex-a2a AGENTS.md
Instructions for liujuanjuan1984/codex-a2a, covering agents.md, 1. 核心原则, 2. git 工作流, 3. issue 与 pr 协作 and 4. 工具与文本规范.
Handler AGENTS.md
AGENTS.md instructions for alDuncanson/Handler, covering development workflow and release process.
a2a-python AGENTS.md
Instructions for a2aproject/a2a-python, covering agents.md, technology stack & architecture, mandatory workflow and optional extras.
adk CLAUDE.md
Instructions for inference-gateway/adk, covering claude.md, what this repo is, commands, architecture and server (server/).
adk AGENTS.md
Instructions for inference-gateway/adk, covering inference gateway a2a adk, project overview, build, test, and development commands, generated files and code style.
documentdb-mcp AGENTS.md
Instructions for Knuckles-Team/documentdb-mcp, covering agents.md, tech stack & architecture, architecture diagram, workflow diagram and commands (run these exactly).