S00-017: Approve fail-closed SCRAM validation after independent integration checks

Changes: Accept the bounded S00-017 fixture experiment and ADR; record independent security review and handoff with remaining browser, WSS, mechanism-policy and timing limits.
Validation: Fresh-cache npm ci and npm test passed on Node 24.21.0/npm 11.19.0 with 44 integrated tests. Verify exact installed pins, eight MIT notices, HTTPS/integrity and unchanged vendor files. make check passed 72 tooling tests; inspect executor scope/message and review metadata whitespace. No browser/server interoperability or constant-time assurance claimed.

Task: S00-017
Agent: auto-security-9ab954f6e021
Role: security
Action: review
Status: done

Task title: Establish fail-closed SCRAM server-final validation

state/handoffs/S00-017.md

@@ -29,3 +29,12 @@ rejection and no timeout policy. No constant-time/browser-crypto/advisory audit.
 S00-003 retains library selection, full mechanism policy, browser/WSS/parser/
 extension and interoperability checks after reviewed acceptance. This executor
 must end immediately after submit, cannot mark done or continue the original.
+
+Independent security review: auto-security-9ab954f6e021, 2026-10-15.
+Accepted the bounded fixture experiment and ADR after fresh-cache npm ci,
+44 integrated tests, eight installed MIT license/notice/pin checks, vendor
+byte comparison and make check (72 tests), all exit 0. Report:
+state/evidence/S00-017-review.md. No blocker or acceptance defect found.
+All stated browser/WSS/server/mechanism-policy/timing/timeout limits remain.
+Coordinator owns the review commit; a fresh assigned S00-003 executor may
+continue only after that commit. Reviewer exits immediately after approve.