[DoodleBears]

Requested by Vain · project thread

Why the change

After #2505 a browser can reach Remote Hosts, but every new synced state (avatars, activity, unread, Activity Center) would have to be built twice, and it was unclear who decides a notification across devices / 记录多设备同步与通知归属的设计结论，避免每次新增同步状态都要做两遍。

Refs #2500, #2180. This records the outcome of a grill-with-docs session with Vain (9 decisions).

Special things to note

• Merge risk: docs only (CONTEXT.md, CONTEXT.zh.md, ADRs). No code. Revert is a plain revert.
• Decisions recorded in ADR-0243:
  • Every client reads every Host, This Host included, through one Host Feed; This Host migrates onto it in slices (avatars, activity, unread first, then Activity Center).
  • The Host decides what deserves attention (Human Inbox); the Paired Device owns its Device Notification Preference and pushes a copy to each Host for closed-app sends. Marks ADR-0202's Host-owned switches as superseded.
  • A phone is only ever a Paired Device; a browser on Host A is a Paired Device of Host B.
  • Browser alerts only while the page is open for now; Web Push later.
  • Language: This Host / Remote Host; Chinese UI 本机 / 远程, never 电脑, so Computer keeps its glossary meaning (the PersonaBots' shared desktop). ADR-0242 is reworded accordingly.
• Verification: pnpm lint, pnpm format:check pass; apps/docs/test/ passes (incl. dev-design-surface.test.ts, which checks en/zh glossary term parity).
• CI test plan: expected affected (docs).

Change outline

• CONTEXT.md / CONTEXT.zh.md: new terms This Host, Remote Host, Paired Device, Host Feed, Device Notification Preference.
• New docs/adr/0243-every-client-reads-every-host-through-one-host-feed.md.
• ADR-0242: Computer → Remote Host. ADR-0202 status: superseded in part by ADR-0243.

No UI change in this PR; the 本机/远程 wording and the Host Feed slices follow in the next PR.

---

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📒 Files selected for processing: 5

• CONTEXT.md
• CONTEXT.zh.md
• docs/adr/0202-phone-push-is-a-content-free-projection-of-the-human-inbox.md
• docs/adr/0242-a-browser-pairs-other-computers-through-their-device-gateway.md
• docs/adr/0243-every-client-reads-every-host-through-one-host-feed.md

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