This article announces interactive shell support in Amazon Bedrock AgentCore Runtime through a new InvokeAgentRuntimeCommandShell API, enabling persistent terminal access into agent sessions over WebSocket.

• New InvokeAgentRuntimeCommandShell API provides PTY-backed terminal access to running agent sessions
• Complements existing InvokeAgentRuntimeCommand API for one-shot command execution
• Supports full terminal features: colors, tab completion, Ctrl+C, terminal resize, automatic reconnect
• Enables developers to authenticate, inspect files, debug, and interact with coding agents interactively
• Persistent state maintained across commands: environment variables, working directory, command history
• Sessions identified by runtime session ID and shell ID for reconnection to same shell
• Supports up to 10 concurrent shells per agent runtime for parallel development workflows
• Access via AgentCore CLI: agentcore exec --it --runtime <runtime-arn>

This enhancement provides developers with full terminal control over agent environments, improving debugging and interactive development capabilities for coding agents on AgentCore Runtime.