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featherChat side (10 tasks): WZP-FC-1: CallSignal WireMessage variant (2-4h) WZP-FC-2: Call state management + sled tree (1-2d) WZP-FC-3: WS handler for call signaling (0.5d) WZP-FC-4: Auth token validation endpoint (2-4h) WZP-FC-5: Group-to-room mapping (1d) WZP-FC-6: Presence/online status API (0.5-2d) WZP-FC-7: Missed call notifications (0.5d) WZP-FC-8: Cross-project identity verification test (2-4h) CRITICAL WZP-FC-9: HKDF salt investigation — VERIFIED: no mismatch (b""→None == None) WZP-FC-10: WZP web bridge shared auth (1-2d) WZP side suggestions (9 items): WZP-S-1 through WZP-S-9 covering auth, signaling bridge, room access control, proto publishing, CLI flags, and 6 hardcoded assumptions that conflict with integration. All tasks reference specific file:line in both codebases. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>