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refactor: separate thread from channel hoc - #3867

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isekovanic merged 5 commits into
perf/message-actionsfrom
refactor/thread-hoc-restructure
Oct 19, 2026
Merged

isekovanic merged 5 commits into
perf/message-actionsfrom
refactor/thread-hoc-restructure

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🎯 Goal

This PR separates the Thread HOC from the Channel one hierarchically. <Thread thread={thread}> now renders next to <Channel> instead of inside it. This removes the if (threadList) ... else ... branching across the SDK and stops opening a thread from running the channel's open sequence, which marked the channel read.

Stacked on perf/message-actions.

πŸ›  Implementation details

- <Channel channel={thread.channel} thread={thread} threadList>
-   <Thread />
- </Channel>
+ <Thread thread={thread}>
+   <MessageList />
+   <MessageComposer />
+ </Thread>
  • <Channel> and <Thread> share a new internal ChannelShell (providers and config props), and each owns only its own lifecycle.
  • Only <Thread> provides ThreadContext; useThreadContext() no longer throws and returns { thread: undefined } outside a thread.
  • Rows in a thread read the thread's paginator. The last-bubble style comes from the row's neighbours instead of a paginator read.

Breaking changes

  • <Channel> loses thread and threadList.
  • <Thread> renders children, thread is required, and the old list/composer props are removed (parentMessagePreventPress moves to ThreadFooterComponent).
  • The ThreadMessageComposer slot is removed.
  • threadList is removed everywhere. Use useThreadContext().thread.
  • ThreadContextValue is { thread?, allowThreadMessagesInChannel }, and onAlsoSentToChannelHeaderPress moved to MessagesContext.

Fixes

  • Opening a thread, or pressing scroll-to-bottom in one, no longer marks the channel read.
  • The unread separator and last-bubble style in a thread use the thread's own state.

🎨 UI Changes

/

πŸ§ͺ Testing

/

β˜‘οΈ Checklist

  • I have signed the Stream CLA (required)
  • PR targets the develop branch
  • Documentation is updated
  • New code is tested in main example apps, including all possible scenarios
    • SampleApp iOS and Android
    • Expo iOS and Android

@isekovanic
isekovanic requested review from oliverlaz, santhoshvai and szuperaz and removed request for santhoshvai October 17, 2026 15:41
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SDK Size

title develop branch diff status
js_bundle_size 2036 KB 2019 KB -17229 B πŸš€
ai_components_size 130 KB 130 KB 0 B 🟒

@isekovanic
isekovanic added this pull request to stack #3873 October 19, 2026 07:56
@isekovanic
isekovanic merged commit c5b82ac into V10 Oct 19, 2026
1 check passed
@isekovanic
isekovanic deleted the refactor/thread-hoc-restructure branch October 19, 2026 09:53
isekovanic pushed a commit that referenced this pull request Oct 19, 2026
…useCreateChatClient (#3871)

## 🎯 Goal

Fix the SDK-side problems the v10 public-API audit found (listed in
`ai-docs/v10-breaking-changes.md` Β§16 in #3870), so they ship fixed
instead of documented as limitations.

The docs PR #3870 already drops these known-issue notes from
`ai-docs/v10-breaking-changes.md` and
`ai-docs/ai-migration-v9-to-v10.md` (Β§13.1, Β§16.1, Β§R.5), so it assumes
this PR lands first or together with it. This PR is code only.

**Stacked on #3869** (Ivan's stack: #3866 β†’ #3867 β†’ #3868 β†’ #3869). The
branch is rebased onto `refactor/stop-creating-sdk-paginator`; until the
PR base is moved there, the diff also shows that stack's commits.

## πŸ›  Implementation details

- **`<Channel>` overrode a registered page size.** On every mount it ran
`channel.messagePaginator.pageSize = 25` (now in `useChannelLifecycle`,
after #3868). That setter is a runtime `updateConfig` patch, which
outranks every declarative layer, so a `client.config.set({ channel: {
messagePaginator: { pageSize } } })` registration (the migration guide's
advice) never took effect. `useChannelLifecycle` now applies the
25-message default only when no `pageSize` is registered under
`channel.messagePaginator` or the general `messagePaginator` key, the
two places the paginator resolves it from.
- **`useCreateChatClient({ userData })` rejected `{ id, name, image
}`.** It was typed `OwnUserResponse | UserResponse`, which require
server-owned fields (`role`, `created_at`, …) in stream-chat v10. It is
now `ClientUser`, exactly what `client.connectUser` accepts. The `as
UserResponse` casts in ExpoChatGPTSample and ExpoMessaging are gone
(ExpoMessaging keeps `as ClientUser` only to narrow away `null`).
- **`AGENTS.md`** said the main entry must never reach
`@stream-io/state-store`, but the `state-store/` stores and Poll
contexts import it at runtime. The rule now matches
`package/bin/validate-entry-isolation.js` (`@stream-io/state-store` and
`lodash` are shared; only `react-syntax-highlighter`,
`@khanacademy/simple-markdown`, `zod`, `victory-native` and Skia are
AI-only), and the script path is corrected.

## 🎨 UI Changes

None.

## πŸ§ͺ Testing

- `Channel.test.tsx` (still passes on the rebased base) β†’ "message page
size": default 25 with nothing registered, and a registered
`channel.messagePaginator.pageSize` / `messagePaginator.pageSize` is
kept after mount. The two registration cases fail with the guard
removed.
- New `useCreateChatClient.userData.test.ts`: a type-level assertion
that the hook's `userData` and `connectUser`'s parameter are mutually
assignable (it fails `test:typecheck` under the old typing), plus a
runtime check that a `{ id, name, image }` user is passed to
`connectUser`.
- After the rebase onto #3869: `yarn lint`, `cd package && yarn
test:typecheck`, and the `Channel` and `useCreateChatClient` suites
pass. Before the rebase, locally green: `yarn build`, `yarn lint`, `cd
package && yarn test:typecheck`, `yarn typecheck` (covers the example
apps without the casts), `yarn test:unit` (2200 passed).

## β˜‘οΈ Checklist

- [ ] I have signed the [Stream
CLA](https://docs.google.com/forms/d/e/1FAIpQLScFKsKkAJI7mhCr7K9rEIOpqIDThrWxuvxnwUq2XkHyG154vQ/viewform)
(required)
- [ ] PR targets the `develop` branch (targets `V10`: v10 release fix)
- [x] Documentation is updated (`AGENTS.md`; migration docs in #3870)
- [ ] New code is tested in main example apps, including all possible
scenarios
  - [ ] SampleApp iOS and Android
  - [ ] Expo iOS and Android
isekovanic pushed a commit that referenced this pull request Oct 19, 2026
## 🎯 Goal

Collect every breaking change between v9 (`develop`) and v10 (`V10`) in
one place, as the source of truth for the v10 migration guide and the
docs update. Also verify the running ledger
`ai-docs/ai-migration-v9-to-v10.md` and measure the impact on the
getstream.io React Native docs.

## πŸ›  Implementation details

- **`ai-docs/v10-breaking-changes.md` (new):** the full list, grouped by
surface: dependencies, removed exports, component props, contexts,
hooks, utilities, types, classes and stores, slots and theme, i18n,
offline DB, `stream-chat` v10 changes RN integrators hit, behavioural
changes, deep imports and new APIs. Each entry has a one-line migration
and links to the ledger section and PR.
- **`ai-docs/v10-docs-impact.md` (new):** per-page impact on
`getstream.io/content/docs/chat-sdk/react-native/v9-latest`. 109 of 302
pages are affected: 6 to delete or replace, 22 major rewrites, 56
snippet or prop-table updates and 25 mentions. It also lists about 12
new pages or sections.
- **`ai-docs/ai-migration-v9-to-v10.md`:** fixes 23 stale or wrong
entries. Examples:
  - `*WithLocalUpdate` β†’ `channel.messageOperations.*`
- there is no `deactivate()`; `activate()` returns its release function
  - `client.activeChannels` β†’ `client.channelManager`
  - `queryChannelsOverride` should use `queryChannelsAndHydrate`
  - `channel.markRead()` vs `markReadViaReporter()`
  - `dbVersion` goes 16 β†’ 18
  - `connection.changed` is no longer dispatched
  - Β§18.4 described a `channelManager` prop that v9 never had

Also adds **Part R** (R.1–R.11) for the gaps the audit found: RN/Expo
peer floors, the `ChatContext.isOnline` removal, the delivery-receipt
props, more removed context fields and props, behaviour changes in
`<Channel>`/`<Thread>`/channel list, `stream-chat` state and client
APIs, the offline DB contract, i18n gaps and deep imports.
- **`ai-docs/i18n-v10-migration.md`:** two corrections. The app-callable
formatter keys were not dead in v9, and the date helpers were deep
imports in v9.
- **`.claude/plans/v10-breaking-changes.md`:** the audit plan.

**How the list was produced:**
1. A TypeScript-compiler snapshot of both public surfaces (about 1,285
exports, with props, context values and class members flattened, plus
the referenced `stream-chat` types), diffed mechanically.
2. The v9 `SampleApp` and `ExpoMessaging` type-checked against V10: 0
errors on v9 and 144 on v10, and every error cluster maps to an entry.
3. A review of all 40 PRs merged into `V10`, the `examples/` diff, and
the deleted or rewritten tests.
4. A cross-check against the `stream-chat` and `stream-chat-react` v10
breaking-change lists.

**Stack: #3866 β†’ #3867 β†’ #3868 β†’ #3869 β†’ #3871 β†’ this PR.** The
known-issue notes for the SDK bugs the audit found are removed here
because #3871 fixes them. The inventory covers `V10` plus #3866–#3869:
the surface diff and the v9 sample-app compile were re-run against the
stack tip.

## 🎨 UI Changes

None (docs only).

## πŸ§ͺ Testing

Docs only. `yarn lint` passes. Every replacement API the new file names
was checked against the V10 exports and `stream-chat` 10.0.0-rc.22.

## β˜‘οΈ Checklist

- [ ] I have signed the [Stream
CLA](https://docs.google.com/forms/d/e/1FAIpQLScFKsKkAJI7mhCr7K9rEIOpqIDThrWxuvxnwUq2XkHyG154vQ/viewform)
(required)
- [ ] PR targets the `develop` branch (targets `V10`)
- [x] Documentation is updated
- [ ] New code is tested in main example apps, including all possible
scenarios (n/a, docs only)
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