Decouple A2A into standalone a2a-elixir package#6
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zeroasterisk merged 2 commits intomainfrom Mar 9, 2026
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## Context Compression (#80) - ADK.Context.Compressor behaviour with configurable strategies - Truncate strategy: keeps system + last N messages - Summarize strategy: uses LLM to condense older messages - Wired into LlmAgent via context_compressor option - Configurable threshold before compression kicks in ## Integration Tests (#92) - test/integration/gemini_api_test.exs with real Gemini API tests - Single-turn Q&A, multi-turn conversation, tool use round-trip - Agent transfer, error handling (bad model, invalid request) - Tagged @tag :integration, excluded by default - Run with: GEMINI_API_KEY=key mix test --include integration ## MCP Client (#77) - Already implemented in prior PRs with full test coverage - Client connects via stdio, performs JSON-RPC initialization - ToolAdapter converts MCP tools to ADK FunctionTools - Mock MCP server for testing ## Housekeeping - Added examples build artifacts to .gitignore
- Add {:a2a, github: "zeroasterisk/a2a-elixir"} dependency
- ADK.A2A.AgentCard now bridges ADK agents to A2A.AgentCard structs
- ADK.A2A.Client delegates to A2A.Client (backward compatible)
- ADK.A2A.Server implements A2A.Handler behaviour, uses A2A.Server
- ADK.A2A.Message adds to_a2a_message/1 bridge function
- ADK.A2A.RemoteAgentTool unchanged (ADK-specific)
- All 226 tests + 14 doctests pass
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Summary
Decouples the A2A protocol implementation into a standalone package at zeroasterisk/a2a-elixir, following the pattern of other language SDKs (Python has
google-a2a, Go has its own module).New package: a2a-elixir
The standalone
a2apackage provides:A2A.AgentCard,A2A.Task,A2A.TaskStatus,A2A.Message,A2A.Part,A2A.ArtifactA2A.Client— fetch agent cards, send/get/cancel tasksA2A.Server— Plug-based JSON-RPC 2.0 server withA2A.Handlercallback behaviourChanges to ADK Elixir
{:a2a, github: "zeroasterisk/a2a-elixir"}dependencyADK.A2A.AgentCard— bridges ADK agents toA2A.AgentCardstructsADK.A2A.Client— delegates toA2A.Client(backward compatible API)ADK.A2A.Server— implementsA2A.Handlerbehaviour, delegates toA2A.ServerADK.A2A.Message— addsto_a2a_message/1bridge, keeps existing functionsADK.A2A.RemoteAgentTool— unchanged (ADK-specific)Key design decisions
A2A.Handlerbehaviour instead of being tied toADK.Runner