Changelog

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All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.1.0] - 2026-04-21

Added

  • ADK.Model.LiteLlm provider — generic OpenAI-compatible client that mirrors Google Python ADK's LiteLlm(model="openai/gpt-4o") pattern. Speaks the OpenAI Chat Completions wire format, so it works against OpenAI directly, a LiteLLM proxy (which fronts 100+ providers under the same protocol), or any OpenAI-compatible endpoint (Groq, Together, OpenRouter, Ollama, vLLM, Azure OpenAI, LM Studio, etc.). Full function calling support via the tools parameter.
  • ADK.Model.Registry now resolves gpt-*, o1*, and o3* model names to LiteLlm configured for OpenAI, and resolves any slash-namespaced model name (e.g. "openai/gpt-4o", "anthropic/claude-3-5-sonnet-20241022") to LiteLlm for LiteLLM-proxy routing (requires :base_url).
  • test/adk/model/lite_llm_test.exs — 21 unit tests covering request serialization, tool handling, config passthrough, and response parsing.
  • test/adk/model/registry_test.exs — 12 unit tests covering all provider prefixes (Gemini, Claude, OpenAI, LiteLLM proxy, unknown).
  • test/integration/openai_test.exs — 2 integration tests against OpenAI (excluded by default; run with OPENAI_API_KEY set).
  • examples/openai.exs — runnable example showing OpenAI via LiteLlm.
  • usage-rules/models.md — LLM usage rule for provider selection and the LiteLLM pattern.

Changed

  • Docs (README, CLAUDE.md, architecture, onboarding, PRD, implementation plan, usage rules) updated to list OpenAI alongside Gemini and Claude.

[1.0.0] - 2026-04-16

First public release on hex.pm.

[0.2.1] - 2026-04-16

Added

  • Hex.pm package metadata (description, licenses, links, docs config)
  • LICENSE file (MIT)
  • CHANGELOG.md
  • LLM usage-rules with sub-rule files (agents, tools, sessions, plugins, telemetry)
  • Architecture and onboarding guides as ex_doc extras

Changed

  • README: added hex badges, usage_rules section, absolute URLs for hexdocs compatibility
  • Cleaned all internal workspace paths from documentation for public release

[0.2.0] - 2026-04-11

Added

  • Phase 5: Plugin system with 12 callback hooks (Runner/Agent/Model/Tool level)
  • Plugin.Manager for chaining plugins with short-circuit semantics
  • Toolset behaviour for dynamic tool providers
  • Pluggable session backends via session_module on Runner
  • OpenTelemetry included in all environments (previously dev/test only)

[0.1.0] - 2026-03-15

Added

  • Phase 1: Core types (Content, Part, FunctionCall, FunctionResponse), Event system, Session management with prefix-scoped state, Agent behaviour and tree utilities
  • Phase 2: Runner with session lifecycle, Flow state machine (Stream.resource/3), Tool system (FunctionTool, Tool.Context), LLM abstraction with Gemini and Claude providers, Model Registry
  • Phase 3: Orchestration agents (LoopAgent, SequentialAgent, ParallelAgent), Agent transfer via TransferToAgent tool, Branch isolation for parallel execution
  • Phase 4: Memory service with word-based search, Artifact service with versioned storage, Dual telemetry (OpenTelemetry spans + Elixir :telemetry events)