SandboxEscapeBench Extended Gold Bank (71 items) — Agentic Containment Detector Scorecard

SandboxEscapeBench extended gold bank: 71 deterministic, rule-labeled items (38 ESCAPE + 33 BENIGN) for scoring agentic-containment detectors — 11 hand-authored items plus 60 converted from redblue_v2's deterministic attack matrix (10 harmful requests x 5 jailbreak wrappers + plain and benign controls). No model judged the labels. Includes the full detector scorecard run (rce_sandbox / firejail, static + dynamic): 38/38 escape recall, 33/33 benign pass, gold-integrity assertion PASS on every item. The n>=30-per-class floor is cleared, making containment a quotable measurement axis. Wilson confidence intervals travel with every rate. Signed measurement cards for these runs are publicly verifiable at https://csoai.org/verify. Part of the CSOAI GSPC instrument family.