usestrix--strix/strix/tools/shell

shell — exec_command + write_stdin

SDK-provided shell tools wired per-run from the sandbox session. Every CLI invocation the agent makes (nmap, ffuf, agent-browser, python3, …) goes through exec_command. write_stdin streams input to a still-running process started by an earlier exec_command (for interactive prompts).

• Implementation: agents.sandbox.capabilities.tools.shell_tool.ShellTool (in the upstream agents SDK)
• Wired in: strix/agents/factory.py — added per-run via the SDK Shell capability; write_stdin is wrapped to drop the SDK's pid arg from the function schema.
• Sandbox env: http_proxy / https_proxy route every shell child through Caido; AGENT_BROWSER_*, REQUESTS_CA_BUNDLE etc. come from containers/Dockerfile.