需求理解: current product scope, priorities, constraints, and acceptance criteria.
方案设计: accepted, code-ready design for the first measurable WebRTC proof of concept.
Project memory: durable decisions and unresolved questions to read at the start of future work.
Current status: bounded snapshot of the current phase, completed baseline, next step, and blockers.
Deployment: old production rollback boundary and the isolated self-hosted-STUN plus LiveKit-SFU/UDP candidate contract.
Maintenance guide: Git workflow, context hygiene, document lifecycle, research policy, and automation.
P2P WebRTC research: evidence, bandwidth model, browser constraints, reference implementations, and feasibility assessment.
Peer-assisted media research: browser shared-encode limits, standard relay re-encoding, deterministic sticky topology, runtime relay-capacity extension, and abandon gates.
Low-server-cost media routes: SFU-root/peer distribution, optional selected-edge TURN, hop-level accounting, privacy-safe ICE evidence, and the bounded transport canary.
Advanced peer distribution: multi-tree/SVC, encoded-object relay, native RTP forwarding, FEC/network-coding, MoQ, and measurable go/no-go gates.
Native shared-encode sender: consolidated Draft #16/#18/#22/#23/#25/#28 ladder, unclassified product-gate failure, staged revalidation, and stop line.
Realtime quality adaptation: correlated capture/send/receive diagnosis, production generation-rebuild gate, path-isolated dual representations, and bounded simulcast/Dynacast/SVC checks.
Browser screen-audio quality: capture/source compatibility, standard readback limits, Opus negotiation boundaries, and the retained no-control decision.
Display name and presence boundaries: browser-local storage failure behavior, Unicode normalization, control-character policy, and the Web-only presence capability boundary.
Agent context governance research: official Codex, Claude Code, Hermes Agent, and GitHub practices adopted by this repository.
ADR-0001: accepted P2P-first media topology and its consequences.
ADR-0002: Host admission, room-scoped private Viewer grants, explicit public-watch, rotation, and minimal SQLite persistence.
ADR-0004: proposed, experiment-only standard-WebRTC peer-assisted spike with hard fanout and failure gates.
ADR-0005: accepted direct/peer UDP -> SFU-root -> optional exceptional-edge TURN direction, with the current default-off controller and migration gates.
ADR-0006: proposed fixed-HIGH native canary, current no-go result, and staged revalidation boundary.
ADR-0007: accepted path-isolated HIGH + at most one LOW policy, optional idle-layer stop, evidence contract, and SVC boundary.

Documentation and project memory are part of the product source of truth. Update them in the same change that alters the corresponding requirement or architecture.