feat(self_hosted_sandboxes): add AgentCore Runtime variant#689
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Adds agentcore/, an AWS Bedrock AgentCore Runtime variant of the self-hosted sandbox demo. Same `ant beta:worker run` entrypoint as docker/; the per-session container is replaced by an AgentCore microVM addressed by runtimeSessionId == ANTHROPIC_SESSION_ID. Operator TUI uses the GA Interactive Shells API (2026-06-05): tui_shell.py speaks InvokeAgentRuntimeCommandShell via the bedrock-agentcore SDK open_shell(); tui_exec.py uses InvokeAgentRuntimeCommand for one-shot. End-to-end verified on us-west-2 with claude-haiku-4-5: poll -> invoke_agent_runtime -> agent writes /workspace -> operator attaches via open_shell() and sees live files; reconnect preserves shell state.
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Summary
Adds
agentcore/, an AWS Bedrock AgentCore Runtime variant of the self-hosted sandbox demo. Sameant beta:worker runentrypoint as the existingdocker/variant; each per-session container is replaced by an AgentCore Runtime microVM addressed by session affinity (runtimeSessionId == ANTHROPIC_SESSION_ID).The host runs
ant beta:worker polland forwards each work item to AgentCore viaboto3.invoke_agent_runtime. Inside the microVM,server.py(@app.entrypoint) spawnsant beta:worker runto attach to that one session's SSE and run bash/read/write/edit/glob/grep tools in/workspace. No org API key reaches the runner — only the environment key is passed in the invoke payload.Operator TUI — GA Interactive Shells
Unlike the other compute variants, this one offers an operator surface into the live per-session microVM:
tui_exec.py— one-shotInvokeAgentRuntimeCommand(HTTP stream).tui_shell.py— interactive PTY via the GAInvokeAgentRuntimeCommandShellAPI (launched 2026-06-05), using the officialbedrock-agentcoreSDKAgentCoreRuntimeClient.open_shell(). Supports--shell-idreconnect (server replays up to 256 KB) and SIGWINCH resize.Testing
End-to-end verified on us-west-2 with
claude-haiku-4-5:poll → claim → invoke_agent_runtime → agent writes /workspace/hello/ → operator attaches via open_shell() and sees the live files. Reconnect preserves shell state (env vars/cwd).ruff check+ruff format --checkpass.