Verifying the build scripts

The SDK itself is a library (drive it through import claude_agent_sdk), but the scripts/ directory is a set of CLIs run by the release workflows. Verify them by running them, not by importing them.

NEVER run the real installer

scripts/download_cli.py shells out to curl https://claude.ai/install.sh | bash (and the PowerShell equivalent). Running it for real overwrites the claude binary on the developer's machine. Do not run bash install.sh, and do not invoke download_cli.py with latest/stable (or any case variant) against the real network.

Instead, put stub curl / bash / powershell on a temp PATH and drive the script under env -i with an isolated HOME (so find_installed_cli() cannot discover the real binary and copy it into src/claude_agent_sdk/_bundled/).

The harness