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Findings 1 and 2 of REVIEW-2026-07-30.md, which must land together: every workspace capability registered with enabled=false, so the only working provider could never execute. Fixing that alone would have turned a dead execution path into a reachable one on an unauthenticated port. Auth: a shared bearer token (HEXIS_API_TOKEN) is now required on the whole /api/v1/ surface, compared with crypto/subtle.ConstantTimeCompare. /health and /ready stay open for probes. It fails closed twice over — hexisd refuses to start with an empty token, and the middleware returns 503 rather than ever serving unauthenticated. Guards: `enabled` and `requires_confirmation` are no longer readable from the request body at all. Previously the handler derived the correct §4.3 default and then let the caller override it, which is worse than no guard because it reads as enforced. Both are now derived from the risk tier by shared helpers in domain, used by the HTTP and provider registration paths alike; unrecognised tiers fail closed to requiring confirmation. BuildCapabilities sets Enabled, RequiresConfirmation and TimeoutSeconds explicitly, and hexisd reconciles drifted rows on startup instead of skipping any capability whose ID already exists — without that, allowlist edits never reach an existing database. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Uea55zaiWuEByEDC4UBSdd