release: 3.5.0

[stainless-app]

Automated Release PR

3.5.0 (2026-01-29)

Full Changelog: v3.4.8...v3.5.0

Features

• add auto-bedrock support based on bedrock/provider.model-name (eaded9f)
• Update stainless.yml for project and publish settings (f90c553)

Bug Fixes

• docs: fix mcp installation instructions for remote servers (85f8584)

Chores

• internal: version bump (d227b02)
• update SDK settings (879b799)

---

This pull request is managed by Stainless's GitHub App.

The semver version number is based on included commit messages. Alternatively, you can manually set the version number in the title of this pull request.

For a better experience, it is recommended to use either rebase-merge or squash-merge when merging this pull request.

🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

[stainless-app]

🧪 Testing

To try out this version of the SDK, run:

pip install 'https://pkg.stainless.com/s/stagehand-python/f90c55378c03c18215d1cdc153f84d587e5048b0/stagehand-3.4.8-py3-none-any.whl'

Expires at: Sat, 28 Feb 2026 19:42:22 GMT
Updated at: Thu, 29 Jan 2026 19:42:22 GMT

[cubic-dev-ai]

No issues found across 10 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

Architecture diagram

sequenceDiagram
    participant User
    participant Client as Stagehand Client
    participant Models as Request Options (FinalRequestOptions)
    participant API as Stagehand API / Local Server
    participant Chrome as Local Chrome Binary

    Note over User, Client: Configuration & Setup
    User->>Client: NEW: copy(local_chrome_path="/path/to/chrome")
    Client->>Client: Instantiate new client with local binary path
    
    Note over User, API: Session Lifecycle
    User->>Client: sessions.start(model={"model_name": "..."})
    
    Client->>Client: Build default headers
    Note right of Client: CHANGED: x-sent-at header removed
    
    Client->>Models: construct(headers, values)
    
    alt Header Processing
        Models->>Models: Iterate provided headers
        Models->>Models: NEW: Preserve 'Omit' values to allow header suppression
        Models->>Models: Strip 'NotGiven' types
    else Other Params
        Models->>Models: strip_not_given(values)
    end
    
    Models-->>Client: FinalRequestOptions
    
    Client->>API: POST /sessions (Structured Model & Updated Headers)
    
    opt Local Execution
        API->>Chrome: Launch using local_chrome_path
    end
    
    API-->>Client: Session Response
    Client-->>User: Session Object

    User->>Client: session.end()
    Client->>API: CHANGED: POST /sessions/{id}/end (x-sent-at removed)
    API-->>Client: SessionEndResponse
    Client-->>User: Success

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[stainless-app]

🤖 Release is at https://github.com/browserbase/stagehand-python/releases/tag/v3.5.0 🌻