Skip to content
Type
Strands Harness
PYPython SDKTSTypeScript SDK
Strands
EVEvalsSHShell
Organizations
strands-agentsstrands-labs
All releases

  1. v0.2.1

    Feb 5, 2026
    GitHub release npm 0.2.1

    Major Features

    Google Gemini Model Provider - PR#426

    A new GeminiModel provider brings native Google Gemini support to the TypeScript SDK. It integrates with the @google/genai SDK and supports streaming text responses with the standard ModelStreamEvent interface, configurable model parameters, and API key authentication via constructor option or the GEMINI_API_KEY environment variable. You can also pass a pre-configured GoogleGenAI client instance. The default model is gemini-2.5-flash. This initial release supports text content streaming, with tool calling planned for a follow-up.

    import { GeminiModel } from 'strands-agents/models/gemini'
    import { Agent } from 'strands-agents'
    

    // With API key (or set GEMINI_API_KEY env var)
    const model = new GeminiModel({
      apiKey: 'your-api-key',
      modelId: 'gemini-2.5-flash',
      params: { temperature: 0.7, maxOutputTokens: 1024 },
    })
    

    const agent = new Agent({ model })
    const result = await agent.invoke('What is the capital of France?')
    

    // Or pass a pre-configured client
    import { GoogleGenAI } from '@google/genai'
    const client = new GoogleGenAI({ apiKey: 'your-api-key' })
    const model2 = new GeminiModel({ client })

    Tool Call Retry via Hooks - PR#493

    Hooks can now request tool execution retries through a new retry property on AfterToolCallEvent, bringing feature parity with the Python SDK. When a hook sets event.retry = true, the agent discards the current result from conversation history and re-executes the tool, emitting a fresh BeforeToolCallEvent on each attempt. Retries work both for error recovery and for success-based re-evaluation when the result doesn’t meet criteria. Breaking change: AfterModelCallEvent.retryModelCall has been renamed to AfterModelCallEvent.retry for consistency.

    import { Agent } from 'strands-agents'
    import { AfterToolCallEvent } from 'strands-agents/hooks/events'
    

    const agent = new Agent({ model, tools: [myTool] })
    

    let attempts = 0
    agent.hooks.addCallback(AfterToolCallEvent, (event: AfterToolCallEvent) => {
      attempts++
      if (event.error && attempts < 3) {
        event.retry = true // Tool will be re-executed
      }
    })

    Migration note: Rename afterModelCallEvent.retryModelCall = true to afterModelCallEvent.retry = true.

    Bug Fixes

    • Add @google/genai to devDependencies - PR#502 Fixed CI build failures by adding the @google/genai package to devDependencies, ensuring TypeScript compilation succeeds for the new Gemini model provider.

    ✦ Features 2

    ⊘ Fixes 1

    ⋯ Other 3