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a2aproject

13 indexed repositories · View on GitHub

A2A
Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.

Shell · 25747 stars
a2a-python
Official Python SDK for the Agent2Agent (A2A) Protocol

Python · 2139 stars
a2a-samples
Samples using the Agent2Agent (A2A) Protocol

Jupyter Notebook · 1764 stars
a2a-js
Official JavaScript SDK for the Agent2Agent (A2A) Protocol

TypeScript · 613 stars
a2a-inspector
Validation Tools for A2A Agents

TypeScript · 490 stars
a2a-java
Official Java SDK for the Agent2Agent (A2A) Protocol

Java · 490 stars
a2a-go
Golang SDK for A2A Protocol

Go · 460 stars
a2a-dotnet
C#/.NET SDK for A2A Protocol

C# · 262 stars
a2a-cli
The official command-line interface for interacting with A2A (Agent2Agent) compatible agents.

Go · 95 stars
a2a-rs
A2A Rust SDK

Rust · 75 stars
a2a-tck

Python · 50 stars
experimental-cpb-slimrpc
SLIMRPC custom protocol binding for A2A.

9 stars
a2a-itk
Integration Testing Kit for A2A SDKs

Python · 7 stars

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572 issues indexed so far

[Proposal]: Plan Mode Extension for Multi-Phase Agent Workflows Open

a2aproject/A2A#1320 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Publish Error descriptions Open

a2aproject/A2A#1321 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Add tags field to AgentCard for agent categorization Open

a2aproject/A2A#1328 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: Inconsistency for task.id vs contextId or messageId Open

a2aproject/A2A#1335 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: A2A client to work as a router and route request to respective agent based on prompt (we can provide multiple agent cards to A2A client) Open

a2aproject/A2A#1336 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: patch releases for the spec repo should only be for non-functional changes Open

bug triaged

a2aproject/A2A#1357 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Spec] Define normative AgentCard capability declaration contract for safe agent discovery Open

a2aproject/A2A#1377 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Telemetry to collect anonymous A2A usage across all SDK Open

TSC Review

a2aproject/A2A#1379 · 7 comments · 1 reaction · 0 assignees · Indexed Sep 13, 2026
[Feat]: Method for blocking on Task updates Open

triaged

a2aproject/A2A#1381 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Add `Task` progress Open

extension-proposal triaged

a2aproject/A2A#1387 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Add metadata field to AgentSkill as a generic extension point Open

a2aproject/A2A#1395 · 2 comments · 7 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: Inconsistent definition of TaskState Open

a2aproject/A2A#1408 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: experiments Open

a2aproject/A2A#1412 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: contexts APIs needed Open

a2aproject/A2A#1419 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: ListTaskPushNotificationConfig paging is not coherent with ListTasks paging Open

a2aproject/A2A#1420 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Add Resource Access Manifest (RAM) to AgentCard Open

a2aproject/A2A#1426 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: evals extensions Open

extension-proposal triaged

a2aproject/A2A#1439 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: agent username field in agent card (extension) Open

extension-proposal

a2aproject/A2A#1441 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Design for testability/eval Open

a2aproject/A2A#1444 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Add `min_items = 1` constraint to `Artifact` in protobuf schema Open

a2aproject/A2A#1456 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Remove extensions field from Message and Artifact Open

status:awaiting response status:stale triaged

a2aproject/A2A#1461 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Proposal: Agent Identity Verification and Trust Framework Open

a2aproject/A2A#1497 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: a2a.proto and specification divergence on subscribeToTask Open

triaged TSC Review

a2aproject/A2A#1574 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Running implementation of agent identity, delegation, and enforcement — addressing #1497, #1472, #1501 Open

a2aproject/A2A#1575 · 110 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: for the data model of a2a, adopt the semantics of existing standards (ADMS, DCAT etc) Open

a2aproject/A2A#1577 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 13, 2026
[Feat]: Built-in Pub/Sub support in the A2A protocol Open

a2aproject/A2A#1593 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 13, 2026
[Bug]: Agent card advertises internal URL instead of exposed URL Open

a2aproject/A2A#1599 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Proposal: compliance extensions to Agent Cards and task semantics Open

a2aproject/A2A#1603 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Feat]: Data handling declarations for Agent Cards Open

a2aproject/A2A#1606 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
trust.signals[] extension: consolidated signal type specification Open

a2aproject/A2A#1628 · 124 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: Validation error example uses non-existent TASK_STATE_RUNNING enum and lowercase enum values Open

triaged

a2aproject/A2A#1642 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug] (docs): User Experience - Life of Task - Content Flow issue (Stateless vs Stateful Task) Open

a2aproject/A2A#1648 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[BUG](docs): User Experience - Establishing Documentation Authority Open

a2aproject/A2A#1649 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug](docs): User Experience - A2A docs HomePage needs a revamp/re-ordering Open

a2aproject/A2A#1650 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
BUG(docs): User Experience - With A2A Key Concepts Page Open

a2aproject/A2A#1651 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Query : Custom HTTP headers Open

a2aproject/A2A#1653 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: bash array syntax error, inconsistent error handling, and incorrect JSON examples Open

a2aproject/A2A#1656 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: Missing SecurityRequirement section referenced in AgentSkill Open

a2aproject/A2A#1658 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Protocol Question] Heartbeat-based agents: availability metadata and offline-first task handling Open

a2aproject/A2A#1667 · 41 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Proposal: Agent Identity Verification for Agent Cards Open

a2aproject/A2A#1672 · 658 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: Clarify how HTTP+JSON/REST returns google.protobuf.Empty Open

a2aproject/A2A#1674 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
[Bug]: Clarify the Content-Type for errors for the HTTP+JSON transport. Open

triaged

a2aproject/A2A#1685 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Add 'limitations' field to AgentCard Open

a2aproject/A2A#1694 · 15 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Cross-org, no shared AS: accountability layer for first-contact A2A transactions Open

a2aproject/A2A#1713 · 30 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
RFC: Authorization layer for A2A AgentSkill invocations — capability token enforcement at skill boundaries Open

a2aproject/A2A#1716 · 50 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Bilateral signed interaction records as the trust primitive for A2A Open

a2aproject/A2A#1718 · 31 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
RFC: Reference HAHS 1.0.0 as recommended agent employment contract standard in A2A spec Open

a2aproject/A2A#1761 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Request to Add Practical Agent Examples to Improve A2A Documentation Open

a2aproject/A2A#1764 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Where should verifier-side trust / permit / receipt artifacts for risky external actions live relative to A2A? Open

a2aproject/A2A#1769 · 68 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026
Conventions for Schema/Mode Negotiation and SDK Level Type Dispatch for Media Types Open

a2aproject/A2A#1776 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 13, 2026

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