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Release notes

Akka constantly gets updates and improvements enabling new features and expanding on existing. This page lists all releases of Akka components including the Akka libraries.

Current versions

May 2026

  • Akka CLI 3.0.64

    • Support for autonomous agents

Autonomous agents

The new Autonomous Agent is an AI model-driven component that runs as a durable process. It works on typed tasks, each with its own identity, instructions, and result schema, and the runtime drives the model through a decision loop until each task is complete. Agent and task state are persisted along the way, so work survives crashes and restarts. A task’s status and result can be queried while it runs or after it finishes.

Multi-agent coordination capabilities are built in. An agent can delegate subtasks to specialist workers, hand off work to a peer, lead a team that shares a task list, or moderate a turn-taking conversation. Those capabilities are exposed to the model as tools so multi-agent systems can be assembled without orchestration code. This complements deterministic, workflow-based multi-agent orchestration: pick a workflow when the sequence of steps is fixed in code, and an Autonomous Agent when the model decides which agent runs next. Both run on the same durable-execution, retry, and audit foundation.

  • Akka SDK 3.6.0

    • Autonomous agents

    • Rewrite multi-agent orchestration documentation

    • Support large session memory

    • Remove deprecated API since SDK 3.4.x and older

    • Runtime 1.6.3

  • Akka Runtime 1.6.3

    • Autonomous agents

    • Java 25 base image

    • Langchain4J 1.15.0

    • Jackson 2.21.3

  • Akka SDK 3.5.19

    • Object store support (S3, GCS, Azure)

    • Azure OpenAI and MistralAI model providers

    • Prompt caching for Anthropic and Bedrock

    • Workflow termination

    • Session memory interceptor

    • Start eventing from a timestamp (when migrating)

    • Custom OpenTelemetry metrics

    • Service instance shutdown hook

    • TestKit mocking of HTTP and gRPC services

    • Runtime 1.5.52

  • Akka CLI 3.0.62

    • Project descriptor can now include docker registry config

  • Akka Runtime 1.5.48 - 1.5.52

    • TTL-based deletion for entities

    • Object storage support (S3, GCS, Azure)

    • Azure and MistralAI model providers

    • Prompt caching for Anthropic and Bedrock

    • Workflow termination, suspend and resume

    • JWT keys configuration from JWKS

    • OpenTelemetry performance improvements

    • SDK expected runtime version validation

  • Akka CLI 3.0.61

    • Maintenance release

April 2026

  • Akka CLI 3.0.60

    • Fixed an issue with multi-regional project descriptors

    • JWKS configuraiton support

  • Akka SDK 3.5.18

    • Automatic expiry for entities

    • Key Value Entity notifications

    • Consumer testkit improvements

    • Agent read timeout bug fix

  • Akka CLI 3.0.59

    • akka local console bugs fixed

    • Service descriptor correctly uses annotations now

    • Secrets parsing now accepts string with embedded commas

    • Updated broker config commands

  • Akka CLI 3.0.58

    • New MCP commands for local cluster management.

  • Akka SDK 3.5.17

    • Compile time validation of dependency conflicts with runtime

    • Multiple view improvements

    • Metrics migrated to OpenTelemetry

  • Akka CLI 3.0.57

    • Two new set of commands for the MCP server, browser and backoffice commands.

March 2026

  • Akka CLI 3.0.56

    • The Akka AI Marketplace plugin has changed name to akka, the CLI will now download this plugin when initializing a project with AI context.

  • Akka CLI 3.0.55

    • Support for spec driven development using VS Code and Copilot

    • Improved shutdown of local Akka services started by an AI agent

  • Akka CLI 3.0.54

    • Updates to akka specifiy

  • Akka CLI 3.0.53

    • Added an optional custom constitution to akka specify

    • Check if akka specify resources have remote updates

    • Better text formatting when printing service configs

  • Akka CLI 3.0.52

    • akka services views query a view query method with a Json payload, also available for local development.

  • Akka CLI 3.0.51

    • More improvement for spec driven development.

  • Akka SDK 3.5.16

    • Google Vertex AI model support

    • Access to deployed services from dev mode

    • Notifications for event sourced entities

    • Default primary selection changed to request-region

    • Improved authentication for Google Pub/Sub

  • Akka CLI 3.0.50

    • More improvement for spec driven development.

    • Adding more commands to MCP plugin.

  • Akka CLI 3.0.49

    • Support for spec driven development using akka specify

  • Akka SDK 3.5.15

    • PDF documents support in Agent user message

    • Token usage tracking in session memory

    • Agent reply wrapper in component client

    • Protobuf serialization support

    • Custom model request headers

February 2026

Views and consumers can start from snapshots

Views and consumers can now be configured to start from a snapshot instead of replaying the full event history. This significantly reduces startup time and resource usage for components that subscribe to high-volume event streams.

  • Akka CLI 3.0.48

    • Improvements to akka project apply command

    • Updated data management commands

    • Allow akka project get without project name to retrieve the current configured project

  • Akka SDK 3.5.14

    • maven multi-module support improvements

    • start views and consumers from snapshot

    • Testkit improvements

  • Akka CLI 3.0.47

    • Improvements to the 'akka code update-context' command

January 2026

Smarter agents with vision and reasoning

Agents gain multimodal capabilities with image input support, enabling models to perceive and reason about visual content. Supported models can now be configured to enable thinking, letting agents reason through complex problems step by step. Other Akka components can be wired directly as agent tools, making it easy to give agents access to your existing business logic without writing glue code.

Workflow notifications and a new fluent API

Workflows get a redesigned, more type-safe and fluent API that makes defining multi-step processes more intuitive. Workflows can now emit streams of real-time notifications to subscribers, keeping clients and downstream systems informed as individual workflows progress through their steps.

Console with deep observability

The Akka console now provides detailed insights into your service structure and component interactions. Run it in local mode to get full request traces showing exactly which components handle each request, along with a detailed view of how agents interact with AI models — invaluable for debugging and understanding agent behavior during development.

  • Akka SDK 3.5.13

    • Workflow notifications

    • WebSocket support

    • Pluggable agent image loading

    • Agent thinking

  • Akka CLI 3.0.46

    • Observability support improved

    • External secrets

    • Support for controlling CLI configuration with MDM solutions

  • Akka CLI 3.0.45

    • Support for configuring custom JVM Truststore

    • Command for bringing up region

  • Akka SDK 3.5.12

    • agent image input mime type support

    • replication filters for Event Sourced Entity and Key Value Entity

    • AI assistance instruction improvements

December 2025

  • Akka CLI 3.0.44

    • Support for configuring Azure observability

    • Project level descriptors through akka project export, akka project apply

    • akka code check, check if project is ready for local development

    • option to wrap log lines in akka local cluster

    • fixed issue when shutting down a local cluster

  • Akka SDK 3.5.11

    • resumable SSE for streaming updates view queries

    • workflow global timeout and pause timeout configuration

  • Akka SDK 3.5.10

    • image input support in Agents

    • Streaming HTTP endpoint improvements

  • Akka Runtime 1.5.22 - 1.5.27

    • many improvements around Consumers/Views subscriptions

November 2025

  • Akka CLI 3.0.40

    • New: akka organization auth test command

    • Better support for Podman

    • Bug fixes

  • Akka SDK 3.5.9

    • fix compile time validation for private methods

  • Akka SDK 3.5.8

    • fix compile time validation for Agent handlers

  • Akka SDK 3.5.7

    • component as agent function tool

    • agent memory filters

    • workflow passivation settings

    • compile time validations

    • direct consumption of protobuf messages in consumer

    • include basic protos and document external protos

    • updated AI coding assistant docs

    • Runtime 1.5.22

  • Akka Runtime 1.5.20 - 1.5.22

    • fix gRPC virtual thread regression

    • sampling priority for debug tracing

    • Akka libraries 25.10 dependencies

    • Recreate state for entity with mutable state

    • filter out messages from unknown tools

    • improvements of metrics and tracing

  • Akka libraries 25.10 releases

  • Akka CLI release 3.0.32 release

    • akka local cluster - New command for launching a local cluster from a project

    • akka local console - Multiple UI updates

    • akka code token - Provision an Akka download token

    • akka code init - Initiated a new Akka SDK project

October 2025

  • Akka SDK 3.5.6

    • BigDecimal support in endpoints and views

    • Santization/anonymization in logs and agents

  • Akka Runtime 1.5.19

    • Agent interaction log

  • Akka SDK 3.5.5

    • Include EvaluatorResult.passed in json response

    • Use @Component and new @AgentRole annotations instead of @AgentDescriptor

    • Comprehensive CLAUDE.md

  • Akka SDK 3.5.4

    • Agent guardrails

    • Evaluator agents

    • New @Component annotation, replacing @ComponentId

    • Better error handling in JsonSchema generation

    • Runtime 1.5.18

  • Akka Runtime 1.5.18

    • Turn unknown tool into ToolCallExecutionFailure

    • Telemetry for evaluation results

  • Akka Runtime 1.5.17

    • Telemetry for view update sequence gap detection

    • Agent guardrails

September 2025

  • Akka SDK 3.5.3

    • User configurable timeouts and retries for model and MCP

    • Environment variable configuration for bearer token issuer

    • Enhanced telemetry context for MCP endpoints and agent commands

    • Local cluster formation for testing failure scenarios

    • Hello world agent Kotlin sample

  • Akka SDK 3.5.2

    • Persist metadata together with event

    • Include json schema for the structured response

    • Documentation improvements

    • Various bug fixes and internal improvements

  • Akka Runtime 1.5.16

    • Langchain4j 1.5.0

  • Akka Runtime 1.5.15

    • Fix unexpected rejected events for views and consumers

    • Allow configuration of model and MCP timeouts and retries

    • Improvements to tracing

    • Support local cluster

  • Akka Runtime 1.5.14

    • Enriched tracing

August 2025

  • Akka SDK 3.5.1

    • GPT-5 support

    • Various bug fixes and internal improvements

  • Akka SDK 3.5.0

    • New typesafe API for workflows - previous Step API is deprecated

    • Improved error handling and serializable UserException

    • Improved HTTP endpoint path consistency

    • Full telemetry context propagation

    • Documentation updates: new and improved workflow samples, background execution, async invocation, and service description docs

    • Various bug fixes and internal improvements

July 2025

  • Akka SDK 3.4.1

    • Improved error handling for AI models and tool exceptions

    • Enhanced JsonSchema creation by supporting recursive types and additional standard library types

    • Self service resolution in integration tests

  • Akka core 2.10.7

June 2025

Agent component

AI agents integrate with AI to perceive their environment, make decisions, and take actions toward a specific goal. Agents can have varying degrees of human intervention from none (completely autonomous) to requiring a human to approve each action the agent takes.

The new Agent component is typically backed by a large language model (LLM). It maintains contextual history in a session memory, which may be shared between multiple agents that are collaborating on the same goal. It may provide function tools and call them as requested by the model.

Several agents can collaborate to achieve a common goal, and they can be orchestrated from a predefined workflow or a dynamically created plan.

Akka’s local console more lightweight

The latest Akka CLI versions run the local console for development without using Docker. It spins up quickly and requires almost no resources.

New Akka SDK learning path in Akkademy

A new course is now available in Akkademy: Introduction to the Akka SDK.

This short, self-paced course introduces the foundational concepts of the Akka SDK. It is organized into brief lessons with coding exercises that run directly in the browser, requiring no installation. The course is ideal for developers who are new to the Akka SDK and want a structured, guided approach to building services.

  • Akka CLI 3.0.23

    • The new akka code init command supports kicking off an Akka project easily.

  • Akka SDK 3.4.0

    • Agent component

    • Agent session memory

    • Agent function tools

    • Agent prompt template

    • MCP server and client support

    • New getting started guides

    • Many samples with AI agents

    • Agent and workflow tracing

    • Documentation updates

  • Akka CLI 3.0.22

    • Akka’s local console is now built-in — runs quickly and doesn’t require Docker anymore!

    • New akka projects settings command that supports removing an unavailable region from multi-region projects

  • Akka Runtime 1.4.14

    • Internal improvements

  • Akka Runtime 1.2.19

    • Internal improvements

May 2025

April 2025

Self managed deployment

For organizations that want control over how Akka services are installed, updated, and maintained. Akka services are packaged into standalone binaries with Akka clustering for scaling and deploy to self-managed nodes. You are responsible for separately managing secure connectivity, routes, installation, deployment, and persistence.

This new deployment alternative is described in Operate Akka in a self-managed environment.

Virtual threads

SDK running on virtual threads means it is possible to benefit from the performance of the underlying async Akka runtime, without having to use complex completion stage composition. The service code can now look like regular, simple, Java code.

The shopping cart endpoint is one example of how that looks like

  • Akka Management 1.6.1

  • Akka CLI 3.0.17

    • Improvements to the akka service proxy command when using --use-grpc-web

  • Akka CLI 3.0.16

    • Manage multi-region aka global hostnames

    • Introduce akka projects hostnames update

    • Configure OpenTelemetry HTTP collectors (additional to gRPC)

  • Akka SDK 3.3.0

    • User logic now runs on virtual threads. This includes some breaking API changes, see migration guide for details.

    • New APIs for retries

  • Akka SDK 3.2.4

  • Akka Runtime 1.4.5, 1.4.6, 1.4.7, 1.4.8

    • Views support for self-joins

    • Improved metrics for consumers and views

    • Workflow improvements

  • Akka Runtime 1.2.14 1.2.15

    • Views support for self-joins

    • Improved metrics for consumers and views

    • Workflow improvements

  • Akka Projections 1.6.11

  • Akka core 2.10.3

    • Support for virtual threads on Java 21

    • New API for retries

March 2025

Replication of Key Value Entities

Akka now supports multi-region replication of Key Value Entities. No code changes are needed for activating replication. This feature is disabled until the next full restart of your service (akka service pause/resume). It’s recommended to add the ReadOnlyEffect as described in Key Value Entity replication.

Service-to-service eventing for Key Value Entities

Service to service eventing is now supported for Key Value Entities. Key value changes are captured as events which can propagate state changes and information between Akka services within the same project.

New primary selection mode

Request-region primary selection mode: The primary region changes when another region receives a write request. Upon a write request to an entity in a region that is not the primary it will move its primary. The new primary ensures that all preceding events from the previous primary have been fully replicated and applied (i.e. persisted) before writing the new event, and thereby guarantees strong consistency when switching from one region to another. Subsequent write requests to the primary region of the entity are handled locally without any further coordination. Write requests to other regions will trigger the same switch-over process. All other entity instances operate unimpeded during the switch-over process.

Automatic deduplication for view updates

When subscribing to entities and service-to-service eventing from a view, updates are now guaranteed to be processed exactly-once. This is not applicable when subscribing to topics. Additionally, a new section describing different message deduplication strategies has been added to the best practices guide.

  • Akka CLI 3.0.15

    • improve Docker helper installation on Windows

  • Akka SDK 3.2.3

    • Workflow subscriptions

  • Akka SDK 3.2.2

    • make it possible to define custom Jackson object mapper for endpoints

    • query parameters support for HTTP Endpoints

    • documenting deduplication strategies for common use cases

  • Akka Runtime 1.4.3, 1.4.4

    • automatic deduplication of views updates

    • improvements for use of reserved words in view queries

    • support for endpoint custom object mapper

    • support for query parameters in HTTP requests

    • increased maximum size for service to service eventing

    • validate event size to ensure replication can always be enabled

    • updated runtime base docker image

    • support for workflow subscriptions in eventing

  • Akka Runtime 1.2.11, 1.2.12, 1.12.13

    • automatic deduplication of views updates

    • improvements for use of reserved words in view queries

    • increased maximum size for service to service eventing

    • updated runtime base docker image

  • Akka SDK 3.2.1

    • make it possible to filter message by region origin, see Consumer documentation

    • checking serialization in entity testkits

    • shutdown immediately if runtime fails at startup

    • Akka Chess sample

    • Akka Runtime 1.4.2

  • Akka Runtime 1.4.0, 1.4.1, 1.4.2

    • Key Value Entity Replication

    • new primary selection mode

    • bind local dev to 127.0.0.1 interface

    • improve view support for parameters and constants

    • validate view parameter array typing for = ANY

    • expose self-region and origin-region

    • rename primary selection modes

  • Akka Runtime 1.2.10

    • improve view support for parameters and constants

    • validate view parameter array typing for = ANY

  • Akka CLI 3.0.14

    • Bug fix for docker repository

  • Akka Projections 1.6.10

February 2025

gRPC endpoints

Akka now supports gRPC endpoints complementing HTTP endpoints. gRPC services enable contract-first development where interfaces can be defined with the protobuf specification. The underlying protobuf serialization format supports backward and forward compatibility avoiding tight coupling by making it easier to evolve services without breaking existing clients. Additionally, gRPC’s supports unary and streaming calls making it a good choice for high-performance service-to-service communication.

Serving static resources from HTTP endpoints

HTTP endpoints can now serve static content. This enables hosting web pages, client-side applications, and other resources within the endpoint. The static content is accessible through a convenience method: Serving static content. Subtree "glob" paths allow serving path hierarchies.

Server-sent events

Server-sent events (SSE) is a way to push a stream of elements through a single HTTP response enabling an HTTP client to see each element one-by-one rather than waiting for an entire response to complete. This is useful for streaming events from a View or monitoring state changes of an entity. We have introduced an API to simplify deferred HTTP responses as a stream of Server-sent Events (SSE).

January 2025

December 2024

  • Akka CLI 3.0.8

    • Updates to configure SSO integrations

  • Akka SDK 3.0.2

    • Integration Tests are now bound to mvn verify and not a specific profile

  • Platform update 2024-12-10

    • New internal structure to capture usage data

    • Updated email server for signup emails

    • Updated JVM memory settings for services

    • Akka Runtime 1.2.5

    • Better gRPC support for the CLI

    • Console updates

      • Empty projects can now be deleted from the Console

    • GCP: Updates of GKE node versions

  • Akka Runtime 1.2.5

    • Improves handling of count(*) in the view query language

  • Akka CLI 3.0.7

    • Improvements to the Local Console

  • Akka SDK 3.0.1

    • Minor improvements

November 2024

  • Akka Projections 1.6.5

  • Akka Projections 1.6.4

  • Akka Projections 1.6.3

  • Akka DynamoDB 2.0.3

  • Akka DynamoDB 2.0.2

  • Akka CLI 3.0.6

    • Automatically retry calls

    • Improved help texts

  • Akka Projections 1.6.2

  • Akka DynamoDB 2.0.1

  • Akka Runtime 1.2.2

    • Disable projection scaling until issue has been investigated and fixed

    • fix problem with read only commands in workflows

  • Akka SDK 3.0.0

    • Runtime 1.2.1

    • Accept old type url for components that can consume pre-existing events

  • Akka Runtime 1.2.1

    • Remove logback startup warnings

    • Don’t log TImeoutException at error level

    • Allow root route for both sdks

  • Akka CLI 3.0.4

    • Changed Docker credentials commands

    • Improved logging commands

    • New commands for dynamic logging levels (akka service logging)

  • Akka SDK 3.0.0-RC4

    • Fix dependency excludes

  • Akka SDK 3.0.0-RC1

    • Json type url cleanup

    • Allow more customization of brokers in dev mode

    • Akka dependencies

    • Smaller improvements

  • Akka Runtime 1.2.0

    • Fix configuration for tracing

    • Json type url cleanup

    • Allow more customization of brokers in dev mode

    • Akka dependencies

    • Smaller improvements

  • Akka Projections 1.6.1

    • Configurable parallelism in initial offset store query for AWS DynamoDB

  • Akka Runtime 1.1.53

    • Several smaller bug fixes and improvements

  • Akka Runtime 1.1.52

    • Several smaller bug fixes and improvements

October 2024

May 2024

October 2023

May 2023

October 2022