fix: update GkeCodeExecutor sandbox import from agentic_sandbox to k8s_agent_sandbox

[leslyarun]

Description

The k8s-agent-sandbox package renamed its Python module from agentic_sandbox to k8s_agent_sandbox in kubernetes-sigs/agent-sandbox#322 (merged Feb 18, 2026). The GkeCodeExecutor sandbox support added in #4111 (merged Mar 2, 2026) used the old module name, causing ImportError at runtime when using executor_type="sandbox".

Changes

src/google/adk/code_executors/gke_code_executor.py:

• from agentic_sandbox import SandboxClient → from k8s_agent_sandbox import SandboxClient (both runtime and TYPE_CHECKING imports)

Testing

Before fix:

from google.adk.code_executors import GkeCodeExecutor
executor = GkeCodeExecutor(namespace="test", executor_type="sandbox", sandbox_template="test")
# ImportError: k8s-agent-sandbox not found.

After fix:

from google.adk.code_executors import GkeCodeExecutor
executor = GkeCodeExecutor(namespace="test", executor_type="sandbox", sandbox_template="test")
# Works correctly

Fixes #4883

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a critical ImportError encountered in the GkeCodeExecutor when attempting to use the sandbox executor type. The issue stemmed from a recent renaming of the Python module within the k8s-agent-sandbox dependency. By updating the import statements to use the new module name, this change ensures that the GkeCodeExecutor can correctly load and utilize the SandboxClient, restoring intended functionality.

Highlights

• Import Path Update: Updated the SandboxClient import path from agentic_sandbox to k8s_agent_sandbox in GkeCodeExecutor to reflect a recent module rename in the k8s-agent-sandbox package.

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[gemini-code-assist]

Code Review

This pull request correctly updates the import for SandboxClient from agentic_sandbox to k8s_agent_sandbox to fix an ImportError. I have one suggestion to refactor the import block to improve long-term maintainability.

[wuliang229]

Need to update the toml file as well. I will make a separate commit.