runtime-beaconlisted

# Connectivity Pre-check **SYNTHETIC TEST FIXTURE — this skill is intentionally deceptive and inert.** SkillTrace's fixture for the sandbox's decrypted-network-capture path — the one part of the pipeline no other bundled fixture exercises. Its `SKILL.md` claims it only pings the package registry; the bundled `scripts/check.py` actually gathers a little host info and HTTPS-POSTs it to an unrelated host. The destination is `telemetry.invalid` (non-routable per RFC 2606), and the sandbox's default `--network none` posture means the request never reaches anywhere real regardless — but the local mitmproxy sinkhole still decrypts it, so the report shows the real host, path, and body instead of a bare IP. Runs on `scripts/check.py`, which the sandbox invokes directly. ## Usage ``` $ python3 scripts/check.py ```