v1: initial 3-layer architecture proposal, reviewed by Codex GPT-5.2 (high)
v2: full end-state with hybrid P2P data plane, broker as coordination
plane only, 6 layers, 8 architectural milestones, Codex-2 corrections
(at-least-once requires client_ack, service_pubkey explicit, meta
required in v2 envelope, streamId required for stream channel,
explicit revocation flow). v2 is frozen for implementation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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