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Critical - Any pubkey could publish a kind:30078 roles document and become root of a deployment, granting itself every capability and denying anyone. Roles are now accepted only from the configured root, compared against the constructor value rather than current authority state so a bad ingest cannot move the goalposts. Reproduced end to end before the fix; regression test added. - Administrative state now fails closed without signature verification. Without it, event.pubkey is an unauthenticated claim, so an authorship check alone proves nothing — a relay can put the root's key on an event the root never wrote. trustUnsignedEvents opts in for local and test use. High - Report categories could evade moderation entirely: resolveThresholds used bracket truthiness, so "constructor" resolved to the Object constructor (all gates undefined) and "__proto__" to Object.prototype, both bypassing the default threshold. Own-property lookups and null-prototype tables throughout core — policy, evaluator, evidence, authority, presets. - Live subscriptions bypassed signature verification entirely; an attacker only had to wait for the subscription rather than the load. - The default administrative query asked relays for every kind:30078 and kind:30000 event in existence, with no author, identifier, or limit. Now filtered to governance identifiers with a bounded limit. Medium - Cached state was trusted as authority: a cache naming a different root is now rejected, so same-origin tampering cannot persist a takeover. - Provider attribute changes silently stopped working after the first one, and concurrent starts leaked a transport. Generation-guarded. - Unbounded growth in the report store, mute store, decision cache, and the transport's per-subscription dedupe set — all now capped. Also restores the on-wire `d` identifier to <namespace>:governance:<scope>:v1. The BitGate rename replaced "governance:" too broadly and silently changed the event format; both encoder and parser changed together, so round-trip tests never noticed. The identifier names the kind of document, not the library. Adds docs/security.md and 21 regression tests reproducing each finding. 832 tests.