You are setting up a Claude application that requires API keys for several external services.
What is the best way to store the keys?

• A. Put the keys in the application's configuration file and check the configuration file into the team's repository alongside the rest of the source code.
• B. Use a single shared key across all external services, so any developer working on the application can find the keys easily during development.
• C. Store the keys in a secrets manager or environment-specific configuration that is not checked into source code, and load them at runtime.
• D. Email the keys to each developer as needed and have each developer paste the keys into their local environment when they begin working on the application's code.

The team is debating whether to build a new capability as a custom tool or to use an existing built-in tool that nearly covers the use case but lacks one specific feature.
How would you decide?

• A. Evaluate whether the missing feature can be addressed by extending the built-in tool or warrants a custom tool, then choose accordingly.
• B. Identify whether the team has previously built similar custom tools and use those precedents to determine which approach is more consistent with the existing codebase.
• C. Examine the custom tool option by scoping the implementation effort and determining whether the additional flexibility justifies the development and maintenance cost.
• D. Review the built-in tool's documentation and assess whether its existing capabilities are sufficient to cover the use case without any modification or extension.

You are building a Claude application that processes 10,000 customer emails overnight to extract structured data. The work is non-interactive, runs once daily, and has a flexible completion window of several hours.
Which Claude API would you use?

• A. The real-time Messages API with concurrent requests to process the emails as fast as possible during the overnight window.
• B. The real-time Messages API, processing the emails one at a time sequentially to ensure consistent ordering of results.
• C. The streaming responses API to process each email and return partial results to a database as the model generates them.
• D. The Batch API, which is designed for non-interactive workloads with flexible completion windows.

You are building an agent that needs to call several internal APIs and a database in a structured, repeatable way. Your team has decided to use the Claude Agent SDK rather than build a custom loop. You are setting up the agent's tool definitions and execution loop.
How would you set up the tools and execution loop?

• A. Use the SDK's tool interface and loop, with conversation history stored in a separate team database.
• B. Use the SDK's tool interface and let the SDK handle the loop, dispatch, and history.
• C. Use the SDK's tool interface and write the loop and history layer in the team's own code.
• D. Call the Messages API directly and let the model format its tool calls in plain text.