docs(product): record Browser v9 source checkpoint

docs/README.md

@@ -4,28 +4,28 @@
 - [方案设计](./方案设计.md): accepted implementation design; unfinished release and validation work is tracked in the current TODO ledger.
 - [Project memory](./project-memory.md): durable current product and source snapshot to read at the start of future work.
 - [Current status](./status.md): bounded current/index snapshot of production, active milestones, decisions, blockers, and links to detail.
-- [Verification status](./verification-status.md): demand-loaded ledger of current cross-cutting evidence, open proof boundaries, and expensive-test applicability.
+- [Verification status](./verification-status.md): exact v9 source gates, current v8 production evidence, open physical proof boundaries, and expensive-test applicability.
 - [Session handoff](./session-handoff.md): temporary bootstrap prompt that points a new session back to the canonical truth owners.
 - [Current TODO](./todo.md): unresolved work, active truth holds, and decisions that still require user confirmation.
-- [Deployment](./deployment.md): exact current/rollback production configuration, release operations, and transport evidence boundaries.
+- [Deployment](./deployment.md): exact v8 current/rollback production configuration, the not-yet-deployed v9 source contract, release operations, and transport evidence boundaries.
 - [Maintenance guide](./maintenance.md): Git workflow, context hygiene, document lifecycle, research policy, and automation.
 - [P2P WebRTC research](./research/webrtc-p2p-screen-sharing.md): evidence, bandwidth model, browser constraints, reference implementations, and feasibility assessment.
-- [Peer-assisted media research](./research/peer-assisted-media.md): browser shared-encode limits, standard relay re-encoding, deterministic sticky topology, runtime relay-capacity extension, and abandon gates.
-- [Low-server-cost media routes](./research/low-server-media-routes.md): Host-publication/SFU distribution, direct-to-SFU conclusion, hop-level accounting, privacy-safe ICE evidence, and bounded transport gates.
+- [Peer-assisted media research](./research/peer-assisted-media.md): browser shared-encode limits, standard relay re-encoding, deterministic sticky topology, v9 exact-route implementation evidence, and remaining physical gates.
+- [Low-server-cost media routes](./research/low-server-media-routes.md): Host-publication/SFU distribution, v9 route diagnostics, direct-to-SFU conclusion, hop-level accounting, privacy-safe ICE evidence, and bounded transport gates.
 - [Built-in peer ICE TURN candidate](./research/built-in-peer-ice-turn.md): historical evidence for the rejected participant-wide and selected-edge TURN candidates.
 - [Advanced peer distribution](./research/advanced-peer-distribution.md): generic local-reconcile evidence plus multi-tree/SVC, encoded-object relay, native RTP forwarding, FEC/network-coding, and MoQ gates.
 - [Native shared-encode sender](./research/native-shared-encode-sender.md): consolidated Draft #16/#18/#22/#23/#25/#28 ladder, unclassified product-gate failure, staged revalidation, and stop line.
 - [Native H.264 hardware decision](./research/native-h264-hardware-decision.md): bounded WebCodecs no-go, proved Media Foundation/NVIDIA hardware encode, the default-fmtp `42c01f` stop, and the retained interop boundary.
 - [Native H.264 opt-in path](./research/native-h264-opt-in-path.md): explicit H.264 sender mode, exact Pion profile registration, and one bounded Host/Viewer loopback with hardware caveats.
-- [Realtime quality adaptation](./research/realtime-quality-adaptation.md): diagnostic-only capture/send/receive correlation, production generation-rebuild evidence, path-isolated dual representations, and bounded simulcast/Dynacast/SVC checks.
+- [Realtime quality adaptation](./research/realtime-quality-adaptation.md): current v9 manual profile/codec boundaries, diagnostic-only capture/send/receive correlation, path-isolated dual representations, and bounded simulcast/Dynacast/SVC checks.
 - [Browser background capture diagnostics](./research/browser-background-capture.md): browser lifecycle evidence, a privacy-bounded capture/send/receive experiment, interpretation gates, and non-goal keepalive mechanisms.
-- [Browser screen-audio quality](./research/browser-screen-audio-quality.md): capture/source compatibility, standard readback limits, Opus negotiation boundaries, and the retained no-control decision.
+- [Browser screen-audio quality](./research/browser-screen-audio-quality.md): capture/source compatibility, v9 live sender-ceiling readback, Opus negotiation boundaries, and remaining audible/device evidence.
 - [Display name and presence boundaries](./research/display-name-presence.md): browser-local storage failure behavior, Unicode normalization, control-character policy, and the Web-only presence capability boundary.
 - [Agent context governance research](./research/agent-context-governance.md): official Codex, Claude Code, Hermes Agent, and GitHub practices adopted by this repository.
 - [ADR-0001](./adr/0001-p2p-first-media-topology.md): historical P2P-first baseline; later access and automatic-routing decisions supersede its stale current-state details.
 - [ADR-0002](./adr/0002-memory-resident-protected-rooms.md): four-digit leased in-memory rooms, local Host defaults, scoped Viewer grants, and orthogonal code entry.
 - [ADR-0004](./adr/0004-peer-assisted-media-experiment.md): historical standard-WebRTC peer-assisted experiment and reusable evidence.
-- [ADR-0005](./adr/0005-automatic-hybrid-media-routing.md): accepted, implemented, and deployed automatic P2P-first single-reconcile route model, capacity/accounting, fallback roles, and exact first-frame transaction; remaining real-network validation is tracked in verification status.
+- [ADR-0005](./adr/0005-automatic-hybrid-media-routing.md): accepted P2P-first single-reconcile route model; its v8 baseline is deployed, while exact v9 first-frame/resource/lifecycle corrections are implemented but not yet deployed and remaining real-network validation is tracked in verification status.
 - [ADR-0006](./adr/0006-fixed-high-native-sender-canary.md): proposed fixed-`HIGH` native canary, current no-go result, and staged revalidation boundary.
 - [ADR-0007](./adr/0007-demand-driven-dual-representation-quality.md): accepted path-isolated `HIGH + at most one LOW` policy, optional idle-layer stop, evidence contract, and SVC boundary.
 - [ADR-0008](./adr/0008-window-scoped-audio-capture.md): browser window-audio hint and the Windows WASAPI process-loopback boundary.