S00-018: Approve bounded XML ingress after independent framing checks

Changes: Accept the isolated S00-018 ingress experiment and bounded ADR; record independent security findings and review handoff. Preserve all browser, live WSS, interoperability and production resource limitations.
Validation: Fresh-cache npm ci and all 55 integrated tests passed on Node 24.21.0/npm 11.19.0; six additional adversarial documents rejected before real JXT.parse with stale callback/fresh attempt checks. Verified ten dependency licenses/integrities, 340 unchanged Stanza files, upstream saxes license bytes and matching digests. Stock defects reproduced; make check passed 72 tooling tests. Initial getter-only tracing attempt failed and is recorded separately. Scope/whitespace inspected; no browser or live WSS test.

Task: S00-018
Agent: auto-security-64dc2d9fa232
Role: security
Action: review
Status: done

Task title: Validate bounded standalone XML ingress for the XMPP candidate

planning/TASK_MATRIX.md

@@ -1,12 +1,12 @@
 # Матрица задач
 
-Generated; state revision **45**. Canonical status: state/tasks.json.
+Generated; state revision **46**. Canonical status: state/tasks.json.
 
 | ID | Этап | Оператор | Reviewer | Статус | Owner | Зависимости | Задача |
 | --- | --- | --- | --- | --- | --- | --- | --- |
 | [S00-001](tasks/S00-001.md) | S00 | orchestrator | security | done | auto-orchestrator-48aab142ecde |  | Утвердить Web-профиль |
 | [S00-002](tasks/S00-002.md) | S00 | orchestrator | security | done | auto-orchestrator-68a05c587e33 | S00-001, S00-011, S00-012 | Выбрать framework и build runtime |
-| [S00-003](tasks/S00-003.md) | S00 | protocol | qa | blocked | auto-protocol-902594b44429 | S00-001, S00-002, S00-017, S00-018 | Проверить XMPP WSS/auth библиотеку |
+| [S00-003](tasks/S00-003.md) | S00 | protocol | qa | todo |  | S00-001, S00-002, S00-017, S00-018 | Проверить XMPP WSS/auth библиотеку |
 | [S00-004](tasks/S00-004.md) | S00 | crypto | security | todo |  | S00-001, S00-002 | Проверить browser OMEMO backend |
 | [S00-005](tasks/S00-005.md) | S00 | storage | qa | todo |  | S00-002 | Выбрать IndexedDB wrapper и migration policy |
 | [S00-006](tasks/S00-006.md) | S00 | orchestrator | security | todo |  | S00-002 | Зафиксировать browser/reference matrix |
@@ -20,7 +20,7 @@ Generated; state revision **45**. Canonical status: state/tasks.json.
 | [S00-015](tasks/S00-015.md) | S00 | ci-cd | qa | done | auto-ci-cd-84e209103f24 | S00-001, S00-011, S00-013, S00-014, S00-016 | Устранить прерывание: Fix runner prompt delivery after partial stdin timeout |
 | [S00-016](tasks/S00-016.md) | S00 | ci-cd | qa | done | auto-ci-cd-351a0cbbabef | S00-001, S00-011, S00-013, S00-014 | Restore reviewer model availability after provider capacity failure |
 | [S00-017](tasks/S00-017.md) | S00 | protocol | security | done | auto-protocol-599343cd9e3f | S00-001, S00-002 | Establish fail-closed SCRAM server-final validation |
-| [S00-018](tasks/S00-018.md) | S00 | protocol | security | review | auto-protocol-89fe6563092c | S00-001, S00-002, S00-017 | Validate bounded standalone XML ingress for the XMPP candidate |
+| [S00-018](tasks/S00-018.md) | S00 | protocol | security | done | auto-protocol-89fe6563092c | S00-001, S00-002, S00-017 | Validate bounded standalone XML ingress for the XMPP candidate |
 | [S00-010](tasks/S00-010.md) | S00 | qa | orchestrator | todo |  | S00-001, S00-002, S00-003, S00-004, S00-005, S00-006, S00-007, S00-008, S00-009 | Gate: Профиль и проверка стека |
 | [S01-001](tasks/S01-001.md) | S01 | orchestrator | security | todo |  | S00-010 | Описать identity/model contracts |
 | [S01-002](tasks/S01-002.md) | S01 | orchestrator | security | todo |  | S00-010, S01-001 | Описать async account context |