Three modules under strix/sandbox/ that bring the per-scan container
plumbing in line with the SDK's capability model:
- healthcheck.py: wait_for_http_ready (FastAPI tool server /health)
and wait_for_tcp_ready (Caido proxy port — no /health endpoint).
Connect/timeout errors continue polling; the timeout error message
carries the last failure class so a stuck scan tells you whether the
port refused, hung, or returned a non-2xx.
- caido_capability.py: CaidoCapability subclasses agents.sandbox.
capabilities.Capability and wires three concerns:
1. process_manifest injects http_proxy / https_proxy / ALL_PROXY
env vars pointing at the in-container Caido listener.
2. tools() returns the seven Caido SDK function tools from Phase 2.5
so the SDK runtime auto-merges them with each agent's tool list.
3. bind() schedules an asyncio.gather of both healthcheck probes;
StrixOrchestrationHooks.on_agent_start awaits the resulting
task before the first LLM call.
Pydantic v2 PrivateAttr is used for the underscore-prefixed runtime
fields (Pydantic forbids underscore-prefixed model fields).
- session_manager.py: per-scan_id cache. create_or_reuse builds the
StrixDockerSandboxClient with docker.from_env() (the SDK's docker
client now requires an explicit DockerSDKClient instance at init),
constructs the Manifest via Environment(value=...) (a flat dict is
silently dropped by Pydantic), resolves the host-side mapped ports
via session._resolve_exposed_port, configures the capability with
those ports *before* binding, and returns a bundle dict the
per-agent context reads to populate tool_server_host_port /
caido_host_port / bearer. cleanup is best-effort: a Docker daemon
error during delete is logged and swallowed so a stranded
container doesn't block the next scan.
Tests: 21 new tests in tests/sandbox/ — healthcheck happy path /
polling-through-failures / timeout for both HTTP and TCP probes (the
TCP test uses a real local listener, no mocks); CaidoCapability env
injection / tool list / bind scheduling / configure_host_ports;
session_manager full create flow, cache reuse, custom timeout, cleanup
including the Docker-daemon-failure swallow path.
mypy override added for docker.* (no upstream stubs); per-file ruff
TC002 ignore added for caido_capability.py — agents.tool.Tool is used
at runtime for the cached _CAIDO_TOOLS tuple.
Refs: PLAYBOOK.md §3.1-3.3, AUDIT.md §2.5 (C5).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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