[SDK] Migrate the feed api classes to the appview client (#11361)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/lib/api/feed/author.ts

@@ -1,23 +1,25 @@
-import {
-  AppBskyFeedDefs,
-  type AppBskyFeedGetAuthorFeed as GetAuthorFeed,
-  type AtpAgent,
-} from '@atproto/api'
+import {AppBskyFeedDefs} from '@atproto/api'
+import {type Client, type XrpcRequestParams} from '@atproto/lex'
 
+import {app} from '#/lexicons'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 
+type GetAuthorFeedParams = XrpcRequestParams<
+  typeof app.bsky.feed.getAuthorFeed.main
+>
+
 export class AuthorFeedAPI implements FeedAPI {
-  agent: AtpAgent
-  _params: GetAuthorFeed.QueryParams
+  client: Client
+  _params: GetAuthorFeedParams
 
   constructor({
-    agent,
+    client,
     feedParams,
   }: {
-    agent: AtpAgent
-    feedParams: GetAuthorFeed.QueryParams
+    client: Client
+    feedParams: GetAuthorFeedParams
   }) {
-    this.agent = agent
+    this.client = client
     this._params = feedParams
   }
 
@@ -28,11 +30,11 @@ export class AuthorFeedAPI implements FeedAPI {
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {
-    const res = await this.agent.getAuthorFeed({
+    const data = await this.client.call(app.bsky.feed.getAuthorFeed, {
       ...this.params,
       limit: 1,
     })
-    return res.data.feed[0]
+    return data.feed[0]
   }
 
   async fetch({
@@ -42,19 +44,20 @@ export class AuthorFeedAPI implements FeedAPI {
     cursor: string | undefined
     limit: number
   }): Promise<FeedAPIResponse> {
-    const res = await this.agent.getAuthorFeed({
+    /*
+     * A failed request rejects rather than resolving, so the error propagates
+     * to the query and drives the feed error UI (blocked actor, rate limit).
+     * The agent behaved the same way - its `success` flag was only ever true -
+     * so the empty-page branch this replaces was unreachable.
+     */
+    const data = await this.client.call(app.bsky.feed.getAuthorFeed, {
       ...this.params,
       cursor,
       limit,
     })
-    if (res.success) {
-      return {
-        cursor: res.data.cursor,
-        feed: this._filter(res.data.feed),
-      }
-    }
     return {
-      feed: [],
+      cursor: data.cursor,
+      feed: this._filter(data.feed),
     }
   }
 

src/lib/api/feed/custom.ts

@@ -1,46 +1,46 @@
-import {
-  type AppBskyFeedDefs,
-  type AppBskyFeedGetFeed as GetCustomFeed,
-  AtpAgent,
-  jsonStringToLex,
-} from '@atproto/api'
+import {type AppBskyFeedDefs, AtpAgent, jsonStringToLex} from '@atproto/api'
+import {type Client, type XrpcRequestParams} from '@atproto/lex'
 
 import {
   getAppLanguageAsContentLanguage,
   getContentLanguages,
 } from '#/state/preferences/languages'
+import {app} from '#/lexicons'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 import {createBskyTopicsHeader, isBlueskyOwnedFeed} from './utils'
 
+type GetCustomFeedParams = XrpcRequestParams<typeof app.bsky.feed.getFeed.main>
+
 export class CustomFeedAPI implements FeedAPI {
-  agent: AtpAgent
-  params: GetCustomFeed.QueryParams
+  client: Client
+  params: GetCustomFeedParams
   userInterests?: string
 
   constructor({
-    agent,
+    client,
     feedParams,
     userInterests,
   }: {
-    agent: AtpAgent
-    feedParams: GetCustomFeed.QueryParams
+    client: Client
+    feedParams: GetCustomFeedParams
     userInterests?: string
   }) {
-    this.agent = agent
+    this.client = client
     this.params = feedParams
     this.userInterests = userInterests
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {
     const contentLangs = getContentLanguages().join(',')
-    const res = await this.agent.app.bsky.feed.getFeed(
+    const data = await this.client.call(
+      app.bsky.feed.getFeed,
       {
         ...this.params,
         limit: 1,
       },
       {headers: {'Accept-Language': contentLangs}},
     )
-    return res.data.feed[0]
+    return data.feed[0]
   }
 
   async fetch({
@@ -51,11 +51,17 @@ export class CustomFeedAPI implements FeedAPI {
     limit: number
   }): Promise<FeedAPIResponse> {
     const contentLangs = getContentLanguages().join(',')
-    const agent = this.agent
     const isBlueskyOwned = isBlueskyOwnedFeed(this.params.feed)
 
-    const res = agent.did
-      ? await this.agent.app.bsky.feed.getFeed(
+    /*
+     * The authed branch rejects on failure, so the error propagates to the
+     * query and drives the feed error UI (feedgen offline, misconfigured, rate
+     * limited). Only the logged-out branch can resolve without data, and it
+     * signals that with a null body.
+     */
+    const data = this.client.did
+      ? await this.client.call(
+          app.bsky.feed.getFeed,
           {
             ...this.params,
             cursor,
@@ -71,21 +77,22 @@ export class CustomFeedAPI implements FeedAPI {
           },
         )
       : await loggedOutFetch({...this.params, cursor, limit})
-    if (res.success) {
-      // NOTE
-      // some custom feeds fail to enforce the pagination limit
-      // so we manually truncate here
-      // -prf
-      if (res.data.feed.length > limit) {
-        res.data.feed = res.data.feed.slice(0, limit)
-      }
+
+    if (!data) {
       return {
-        cursor: res.data.feed.length ? res.data.cursor : undefined,
-        feed: res.data.feed,
+        feed: [],
       }
     }
+
+    // NOTE
+    // some custom feeds fail to enforce the pagination limit
+    // so we manually truncate here
+    // -prf
+    const feed =
+      data.feed.length > limit ? data.feed.slice(0, limit) : data.feed
     return {
-      feed: [],
+      cursor: feed.length ? data.cursor : undefined,
+      feed,
     }
   }
 }
@@ -105,7 +112,7 @@ async function loggedOutFetch({
   feed: string
   limit: number
   cursor?: string
-}) {
+}): Promise<app.bsky.feed.getFeed.$OutputBody | null> {
   let contentLangs = getAppLanguageAsContentLanguage()
 
   /**
@@ -128,14 +135,15 @@ async function loggedOutFetch({
       headers: {'Accept-Language': contentLangs, ...labelersHeader},
     },
   )
+  /*
+   * The response is hand-decoded rather than validated, so the lex output shape
+   * is asserted here just as the old-world one was.
+   */
   let data = res.ok
-    ? (jsonStringToLex(await res.text()) as GetCustomFeed.OutputSchema)
+    ? (jsonStringToLex(await res.text()) as app.bsky.feed.getFeed.$OutputBody)
     : null
   if (data?.feed?.length) {
-    return {
-      success: true,
-      data,
-    }
+    return data
   }
 
   // no data, try again with language headers removed
@@ -146,17 +154,11 @@ async function loggedOutFetch({
     {method: 'GET', headers: {'Accept-Language': '', ...labelersHeader}},
   )
   data = res.ok
-    ? (jsonStringToLex(await res.text()) as GetCustomFeed.OutputSchema)
+    ? (jsonStringToLex(await res.text()) as app.bsky.feed.getFeed.$OutputBody)
     : null
   if (data?.feed?.length) {
-    return {
-      success: true,
-      data,
-    }
+    return data
   }
 
-  return {
-    success: false,
-    data: {feed: []},
-  }
+  return null
 }

src/lib/api/feed/demo.ts

@@ -1,13 +1,14 @@
-import {type AppBskyFeedDefs, type AtpAgent} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client} from '@atproto/lex'
 
 import {DEMO_FEED} from '#/lib/demo'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 
 export class DemoFeedAPI implements FeedAPI {
-  agent: AtpAgent
+  client: Client
 
-  constructor({agent}: {agent: AtpAgent}) {
-    this.agent = agent
+  constructor({client}: {client: Client}) {
+    this.client = client
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {

src/lib/api/feed/following.ts

@@ -1,19 +1,21 @@
-import {type AppBskyFeedDefs, type AtpAgent} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client} from '@atproto/lex'
 
+import {app} from '#/lexicons'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 
 export class FollowingFeedAPI implements FeedAPI {
-  agent: AtpAgent
+  client: Client
 
-  constructor({agent}: {agent: AtpAgent}) {
-    this.agent = agent
+  constructor({client}: {client: Client}) {
+    this.client = client
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {
-    const res = await this.agent.getTimeline({
+    const data = await this.client.call(app.bsky.feed.getTimeline, {
       limit: 1,
     })
-    return res.data.feed[0]
+    return data.feed[0]
   }
 
   async fetch({
@@ -23,18 +25,19 @@ export class FollowingFeedAPI implements FeedAPI {
     cursor: string | undefined
     limit: number
   }): Promise<FeedAPIResponse> {
-    const res = await this.agent.getTimeline({
+    /*
+     * A failed request rejects rather than resolving, so the error propagates
+     * to the query and drives the feed error UI. The agent behaved the same
+     * way - its `success` flag was only ever true - so the empty-page branch
+     * this replaces was unreachable.
+     */
+    const data = await this.client.call(app.bsky.feed.getTimeline, {
       cursor,
       limit,
     })
-    if (res.success) {
-      return {
-        cursor: res.data.cursor,
-        feed: res.data.feed,
-      }
-    }
     return {
-      feed: [],
+      cursor: data.cursor,
+      feed: data.feed,
     }
   }
 }

src/lib/api/feed/home.ts

@@ -1,4 +1,6 @@
-import {type AppBskyFeedDefs, type AtpAgent} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client} from '@atproto/lex'
+import {type AtUriString} from '@atproto/syntax'
 
 import {PROD_DEFAULT_FEED} from '#/lib/constants'
 import {CustomFeedAPI} from './custom'
@@ -27,7 +29,7 @@ export const FALLBACK_MARKER_POST: AppBskyFeedDefs.FeedViewPost = {
 }
 
 export class HomeFeedAPI implements FeedAPI {
-  agent: AtpAgent
+  client: Client
   following: FollowingFeedAPI
   discover: CustomFeedAPI
   usingDiscover = false
@@ -36,25 +38,25 @@ export class HomeFeedAPI implements FeedAPI {
 
   constructor({
     userInterests,
-    agent,
+    client,
   }: {
     userInterests?: string
-    agent: AtpAgent
+    client: Client
   }) {
-    this.agent = agent
-    this.following = new FollowingFeedAPI({agent})
+    this.client = client
+    this.following = new FollowingFeedAPI({client})
     this.discover = new CustomFeedAPI({
-      agent,
-      feedParams: {feed: PROD_DEFAULT_FEED('whats-hot')},
+      client,
+      feedParams: {feed: PROD_DEFAULT_FEED('whats-hot') as AtUriString},
     })
     this.userInterests = userInterests
   }
 
   reset() {
-    this.following = new FollowingFeedAPI({agent: this.agent})
+    this.following = new FollowingFeedAPI({client: this.client})
     this.discover = new CustomFeedAPI({
-      agent: this.agent,
-      feedParams: {feed: PROD_DEFAULT_FEED('whats-hot')},
+      client: this.client,
+      feedParams: {feed: PROD_DEFAULT_FEED('whats-hot') as AtUriString},
       userInterests: this.userInterests,
     })
     this.usingDiscover = false

src/lib/api/feed/likes.ts

@@ -1,32 +1,34 @@
-import {
-  type AppBskyFeedDefs,
-  type AppBskyFeedGetActorLikes as GetActorLikes,
-  type AtpAgent,
-} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client, type XrpcRequestParams} from '@atproto/lex'
 
+import {app} from '#/lexicons'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 
+type GetActorLikesParams = XrpcRequestParams<
+  typeof app.bsky.feed.getActorLikes.main
+>
+
 export class LikesFeedAPI implements FeedAPI {
-  agent: AtpAgent
-  params: GetActorLikes.QueryParams
+  client: Client
+  params: GetActorLikesParams
 
   constructor({
-    agent,
+    client,
     feedParams,
   }: {
-    agent: AtpAgent
-    feedParams: GetActorLikes.QueryParams
+    client: Client
+    feedParams: GetActorLikesParams
   }) {
-    this.agent = agent
+    this.client = client
     this.params = feedParams
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {
-    const res = await this.agent.getActorLikes({
+    const data = await this.client.call(app.bsky.feed.getActorLikes, {
       ...this.params,
       limit: 1,
     })
-    return res.data.feed[0]
+    return data.feed[0]
   }
 
   async fetch({
@@ -36,21 +38,22 @@ export class LikesFeedAPI implements FeedAPI {
     cursor: string | undefined
     limit: number
   }): Promise<FeedAPIResponse> {
-    const res = await this.agent.getActorLikes({
+    /*
+     * A failed request rejects rather than resolving, so the error propagates
+     * to the query and drives the feed error UI. The agent behaved the same
+     * way - its `success` flag was only ever true - so the empty-page branch
+     * this replaces was unreachable.
+     */
+    const data = await this.client.call(app.bsky.feed.getActorLikes, {
       ...this.params,
       cursor,
       limit,
     })
-    if (res.success) {
-      // HACKFIX: the API incorrectly returns a cursor when there are no items -sfn
-      const isEmptyPage = res.data.feed.length === 0
-      return {
-        cursor: isEmptyPage ? undefined : res.data.cursor,
-        feed: res.data.feed,
-      }
-    }
+    // HACKFIX: the API incorrectly returns a cursor when there are no items -sfn
+    const isEmptyPage = data.feed.length === 0
     return {
-      feed: [],
+      cursor: isEmptyPage ? undefined : data.cursor,
+      feed: data.feed,
     }
   }
 }

src/lib/api/feed/list.ts

@@ -1,32 +1,34 @@
-import {
-  type Agent,
-  type AppBskyFeedDefs,
-  type AppBskyFeedGetListFeed as GetListFeed,
-} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client, type XrpcRequestParams} from '@atproto/lex'
 
+import {app} from '#/lexicons'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 
+type GetListFeedParams = XrpcRequestParams<
+  typeof app.bsky.feed.getListFeed.main
+>
+
 export class ListFeedAPI implements FeedAPI {
-  agent: Agent
-  params: GetListFeed.QueryParams
+  client: Client
+  params: GetListFeedParams
 
   constructor({
-    agent,
+    client,
     feedParams,
   }: {
-    agent: Agent
-    feedParams: GetListFeed.QueryParams
+    client: Client
+    feedParams: GetListFeedParams
   }) {
-    this.agent = agent
+    this.client = client
     this.params = feedParams
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {
-    const res = await this.agent.app.bsky.feed.getListFeed({
+    const data = await this.client.call(app.bsky.feed.getListFeed, {
       ...this.params,
       limit: 1,
     })
-    return res.data.feed[0]
+    return data.feed[0]
   }
 
   async fetch({
@@ -36,19 +38,20 @@ export class ListFeedAPI implements FeedAPI {
     cursor: string | undefined
     limit: number
   }): Promise<FeedAPIResponse> {
-    const res = await this.agent.app.bsky.feed.getListFeed({
+    /*
+     * A failed request rejects rather than resolving, so the error propagates
+     * to the query and drives the feed error UI. The agent behaved the same
+     * way - its `success` flag was only ever true - so the empty-page branch
+     * this replaces was unreachable.
+     */
+    const data = await this.client.call(app.bsky.feed.getListFeed, {
       ...this.params,
       cursor,
       limit,
     })
-    if (res.success) {
-      return {
-        cursor: res.data.cursor,
-        feed: res.data.feed,
-      }
-    }
     return {
-      feed: [],
+      cursor: data.cursor,
+      feed: data.feed,
     }
   }
 }

src/lib/api/feed/merge.ts

@@ -1,8 +1,6 @@
-import {
-  type AppBskyFeedDefs,
-  type AppBskyFeedGetTimeline,
-  type AtpAgent,
-} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client} from '@atproto/lex'
+import {type AtUriString} from '@atproto/syntax'
 import shuffle from 'lodash.shuffle'
 
 import {bundleAsync} from '#/lib/async/bundle'
@@ -10,6 +8,7 @@ import {timeout} from '#/lib/async/timeout'
 import {feedUriToHref} from '#/lib/strings/url-helpers'
 import {getContentLanguages} from '#/state/preferences/languages'
 import {type FeedParams} from '#/state/queries/post-feed'
+import {app} from '#/lexicons'
 import {FeedTuner} from '../feed-manip'
 import {type FeedTunerFn} from '../feed-manip'
 import {
@@ -22,9 +21,19 @@ import {createBskyTopicsHeader, isBlueskyOwnedFeed} from './utils'
 const REQUEST_WAIT_MS = 500 // 500ms
 const POST_AGE_CUTOFF = 60e3 * 60 * 24 // 24hours
 
+/**
+ * A page of feed items, or `null` when the source could not produce one. Only
+ * sources that deliberately swallow their own errors return `null`; the rest
+ * reject so the error reaches the caller.
+ */
+type MergeFeedPage = {
+  cursor?: string
+  feed: AppBskyFeedDefs.FeedViewPost[]
+} | null
+
 export class MergeFeedAPI implements FeedAPI {
   userInterests?: string
-  agent: AtpAgent
+  client: Client
   params: FeedParams
   feedTuners: FeedTunerFn[]
   following: MergeFeedSource_Following
@@ -34,29 +43,29 @@ export class MergeFeedAPI implements FeedAPI {
   sampleCursor = 0
 
   constructor({
-    agent,
+    client,
     feedParams,
     feedTuners,
     userInterests,
   }: {
-    agent: AtpAgent
+    client: Client
     feedParams: FeedParams
     feedTuners: FeedTunerFn[]
     userInterests?: string
   }) {
-    this.agent = agent
+    this.client = client
     this.params = feedParams
     this.feedTuners = feedTuners
     this.userInterests = userInterests
     this.following = new MergeFeedSource_Following({
-      agent: this.agent,
+      client: this.client,
       feedTuners: this.feedTuners,
     })
   }
 
   reset() {
     this.following = new MergeFeedSource_Following({
-      agent: this.agent,
+      client: this.client,
       feedTuners: this.feedTuners,
     })
     this.customFeeds = []
@@ -68,7 +77,7 @@ export class MergeFeedAPI implements FeedAPI {
         this.params.mergeFeedSources.map(
           feedUri =>
             new MergeFeedSource_Custom({
-              agent: this.agent,
+              client: this.client,
               feedUri,
               feedTuners: this.feedTuners,
               userInterests: this.userInterests,
@@ -81,10 +90,10 @@ export class MergeFeedAPI implements FeedAPI {
   }
 
   async peekLatest(): Promise<AppBskyFeedDefs.FeedViewPost> {
-    const res = await this.agent.getTimeline({
+    const data = await this.client.call(app.bsky.feed.getTimeline, {
       limit: 1,
     })
-    return res.data.feed[0]
+    return data.feed[0]
   }
 
   async fetch({
@@ -175,7 +184,7 @@ export class MergeFeedAPI implements FeedAPI {
 }
 
 class MergeFeedSource {
-  agent: AtpAgent
+  client: Client
   feedTuners: FeedTunerFn[]
   sourceInfo: ReasonFeedSource | undefined
   cursor: string | undefined = undefined
@@ -183,13 +192,13 @@ class MergeFeedSource {
   hasMore = true
 
   constructor({
-    agent,
+    client,
     feedTuners,
   }: {
-    agent: AtpAgent
+    client: Client
     feedTuners: FeedTunerFn[]
   }) {
-    this.agent = agent
+    this.client = client
     this.feedTuners = feedTuners
   }
 
@@ -210,11 +219,11 @@ class MergeFeedSource {
   }
 
   _fetchNextInner = bundleAsync(async (n: number) => {
-    const res = await this._getFeed(this.cursor, n)
-    if (res.success) {
-      this.cursor = res.data.cursor
-      if (res.data.feed.length) {
-        this.queue = this.queue.concat(res.data.feed)
+    const page = await this._getFeed(this.cursor, n)
+    if (page) {
+      this.cursor = page.cursor
+      if (page.feed.length) {
+        this.queue = this.queue.concat(page.feed)
       } else {
         this.hasMore = false
       }
@@ -226,7 +235,7 @@ class MergeFeedSource {
   protected _getFeed(
     _cursor: string | undefined,
     _limit: number,
-  ): Promise<AppBskyFeedGetTimeline.Response> {
+  ): Promise<MergeFeedPage> {
     throw new Error('Must be overridden')
   }
 }
@@ -238,42 +247,49 @@ class MergeFeedSource_Following extends MergeFeedSource {
     return this._fetchNextInner(n)
   }
 
+  /*
+   * No error handling: a failed timeline read rejects, which is what the agent
+   * did too, so the error still reaches `MergeFeedAPI.fetch` and the query.
+   */
   protected async _getFeed(
     cursor: string | undefined,
     limit: number,
-  ): Promise<AppBskyFeedGetTimeline.Response> {
-    const res = await this.agent.getTimeline({cursor, limit})
+  ): Promise<MergeFeedPage> {
+    const data = await this.client.call(app.bsky.feed.getTimeline, {
+      cursor,
+      limit,
+    })
     // run the tuner pre-emptively to ensure better mixing
-    const slices = this.tuner.tune(res.data.feed, {
+    const slices = this.tuner.tune(data.feed, {
       dryRun: false,
     })
-    res.data.feed = slices.map(slice => slice._feedPost)
-    return res
+    return {
+      cursor: data.cursor,
+      feed: slices.map(slice => slice._feedPost),
+    }
   }
 }
 
 class MergeFeedSource_Custom extends MergeFeedSource {
-  agent: AtpAgent
   minDate: Date
   feedUri: string
   userInterests?: string
 
   constructor({
-    agent,
+    client,
     feedUri,
     feedTuners,
     userInterests,
   }: {
-    agent: AtpAgent
+    client: Client
     feedUri: string
     feedTuners: FeedTunerFn[]
     userInterests?: string
   }) {
     super({
-      agent,
+      client,
       feedTuners,
     })
-    this.agent = agent
     this.feedUri = feedUri
     this.userInterests = userInterests
     this.sourceInfo = {
@@ -287,15 +303,16 @@ class MergeFeedSource_Custom extends MergeFeedSource {
   protected async _getFeed(
     cursor: string | undefined,
     limit: number,
-  ): Promise<AppBskyFeedGetTimeline.Response> {
+  ): Promise<MergeFeedPage> {
     try {
       const contentLangs = getContentLanguages().join(',')
       const isBlueskyOwned = isBlueskyOwnedFeed(this.feedUri)
-      const res = await this.agent.app.bsky.feed.getFeed(
+      const data = await this.client.call(
+        app.bsky.feed.getFeed,
         {
           cursor,
           limit,
-          feed: this.feedUri,
+          feed: this.feedUri as AtUriString,
         },
         {
           headers: {
@@ -310,22 +327,24 @@ class MergeFeedSource_Custom extends MergeFeedSource {
       // some custom feeds fail to enforce the pagination limit
       // so we manually truncate here
       // -prf
-      if (limit && res.data.feed.length > limit) {
-        res.data.feed = res.data.feed.slice(0, limit)
-      }
+      let feed: AppBskyFeedDefs.FeedViewPost[] =
+        limit && data.feed.length > limit
+          ? data.feed.slice(0, limit)
+          : data.feed
       // filter out older posts
-      res.data.feed = res.data.feed.filter(
-        post => new Date(post.post.indexedAt) > this.minDate,
-      )
+      feed = feed.filter(post => new Date(post.post.indexedAt) > this.minDate)
       // attach source info
-      for (const post of res.data.feed) {
+      for (const post of feed) {
         // @ts-ignore
         post.__source = this.sourceInfo
       }
-      return res
+      return {
+        cursor: data.cursor,
+        feed,
+      }
     } catch {
       // dont bubble custom-feed errors
-      return {success: false, headers: {}, data: {feed: []}}
+      return null
     }
   }
 }

src/lib/api/feed/posts.ts

@@ -1,25 +1,25 @@
-import {
-  type Agent,
-  type AppBskyFeedDefs,
-  type AppBskyFeedGetPosts,
-} from '@atproto/api'
+import {type AppBskyFeedDefs} from '@atproto/api'
+import {type Client, type XrpcRequestParams} from '@atproto/lex'
 
 import {logger} from '#/logger'
+import {app} from '#/lexicons'
 import {type FeedAPI, type FeedAPIResponse} from './types'
 
+type GetPostsParams = XrpcRequestParams<typeof app.bsky.feed.getPosts.main>
+
 export class PostListFeedAPI implements FeedAPI {
-  agent: Agent
-  params: AppBskyFeedGetPosts.QueryParams
+  client: Client
+  params: GetPostsParams
   peek: AppBskyFeedDefs.FeedViewPost | null = null
 
   constructor({
-    agent,
+    client,
     feedParams,
   }: {
-    agent: Agent
-    feedParams: AppBskyFeedGetPosts.QueryParams
+    client: Client
+    feedParams: GetPostsParams
   }) {
-    this.agent = agent
+    this.client = client
     if (feedParams.uris.length > 25) {
       logger.warn(
         `Too many URIs provided - expected 25, got ${feedParams.uris.length}`,
@@ -36,17 +36,18 @@ export class PostListFeedAPI implements FeedAPI {
   }
 
   async fetch({}: {}): Promise<FeedAPIResponse> {
-    const res = await this.agent.app.bsky.feed.getPosts({
+    /*
+     * A failed request rejects rather than resolving, so the error propagates
+     * to the query and drives the feed error UI. The agent behaved the same
+     * way - its `success` flag was only ever true - so the empty-page branch
+     * this replaces was unreachable.
+     */
+    const data = await this.client.call(app.bsky.feed.getPosts, {
       ...this.params,
     })
-    if (res.success) {
-      this.peek = {post: res.data.posts[0]}
-      return {
-        feed: res.data.posts.map(post => ({post})),
-      }
-    }
+    this.peek = {post: data.posts[0]}
     return {
-      feed: [],
+      feed: data.posts.map(post => ({post})),
     }
   }
 }

src/state/queries/explore-feed-previews.tsx

@@ -5,6 +5,7 @@ import {
   AtUri,
   moderatePost,
 } from '@atproto/api'
+import {type AtUriString} from '@atproto/syntax'
 import {msg} from '@lingui/core/macro'
 import {useLingui} from '@lingui/react'
 import {
@@ -28,7 +29,7 @@ import {
   embedViewRecordToPostView,
   getEmbeddedPost,
 } from '#/state/queries/util'
-import {useAgent} from '#/state/session'
+import {useAppviewClient} from '#/state/session'
 
 const RQKEY_ROOT = 'feed-previews'
 const RQKEY = (feeds: string[]) => [RQKEY_ROOT, feeds]
@@ -121,7 +122,7 @@ export function useFeedPreviews(
 
   const uris = feeds.map(feed => feed.uri)
   const {_} = useLingui()
-  const agent = useAgent()
+  const client = useAppviewClient()
   const {data: preferences} = usePreferencesQuery()
   const userInterests = aggregateUserInterests(preferences)
   const moderationOpts = useModerationOpts()
@@ -143,8 +144,8 @@ export function useFeedPreviews(
     queryFn: async ({pageParam}) => {
       const feed = feeds[pageParam]
       const api = new CustomFeedAPI({
-        agent,
-        feedParams: {feed: feed.uri},
+        client,
+        feedParams: {feed: feed.uri as AtUriString},
         userInterests,
       })
       const data = await api.fetch({cursor: undefined, limit: LIMIT})

src/state/queries/post-feed.ts

@@ -4,12 +4,13 @@ import {
   type AppBskyActorDefs,
   AppBskyFeedDefs,
   type AppBskyFeedPost,
-  type AtpAgent,
   AtUri,
   moderatePost,
   type ModerationDecision,
   type ModerationPrefs,
 } from '@atproto/api'
+import {type Client} from '@atproto/lex'
+import {type AtIdentifierString, type AtUriString} from '@atproto/syntax'
 import {
   type InfiniteData,
   type QueryClient,
@@ -33,7 +34,7 @@ import {DISCOVER_FEED_URI} from '#/lib/constants'
 import {logger} from '#/logger'
 import {STALE} from '#/state/queries'
 import {DEFAULT_LOGGED_OUT_PREFERENCES} from '#/state/queries/preferences/const'
-import {useAgent} from '#/state/session'
+import {useAgent, useAppviewClient} from '#/state/session'
 import * as userActionHistory from '#/state/userActionHistory'
 import {KnownError} from '#/view/com/posts/PostFeedErrorMessage'
 import {useFeedTuners} from '../preferences/feed-tuners'
@@ -149,6 +150,7 @@ export function usePostFeedQuery(
     ) ?? -1
   const enableFollowingToDiscoverFallback = followingPinnedIndex === 0
   const agent = useAgent()
+  const client = useAppviewClient()
   const lastRun = useRef<{
     data: InfiniteData<FeedPageUnselected>
     args: typeof selectArgs
@@ -193,7 +195,7 @@ export function usePostFeedQuery(
               feedDesc,
               feedParams: params || {},
               feedTuners,
-              agent,
+              client,
               // Not in the query key because they don't change:
               userInterests,
               // Not in the query key. Reacting to it switching isn't important:
@@ -443,55 +445,68 @@ function createApi({
   feedParams,
   feedTuners,
   userInterests,
-  agent,
+  client,
   enableFollowingToDiscoverFallback,
 }: {
   feedDesc: FeedDescriptor
   feedParams: FeedParams
   feedTuners: FeedTunerFn[]
   userInterests?: string
-  agent: AtpAgent
+  client: Client
   enableFollowingToDiscoverFallback: boolean
 }) {
   if (feedDesc === 'following') {
     if (feedParams.mergeFeedEnabled) {
       return new MergeFeedAPI({
-        agent,
+        client,
         feedParams,
         feedTuners,
         userInterests,
       })
     } else {
       if (enableFollowingToDiscoverFallback) {
-        return new HomeFeedAPI({agent, userInterests})
+        return new HomeFeedAPI({client, userInterests})
       } else {
-        return new FollowingFeedAPI({agent})
+        return new FollowingFeedAPI({client})
       }
     }
   } else if (feedDesc.startsWith('author')) {
     const [__, actor, filter] = feedDesc.split('|')
-    return new AuthorFeedAPI({agent, feedParams: {actor, filter}})
+    /*
+     * The descriptor is split out of an internally-built string, so neither the
+     * actor identifier nor the filter token is narrowed by the compiler here.
+     */
+    return new AuthorFeedAPI({
+      client,
+      feedParams: {actor: actor as AtIdentifierString, filter},
+    })
   } else if (feedDesc.startsWith('likes')) {
     const [__, actor] = feedDesc.split('|')
-    return new LikesFeedAPI({agent, feedParams: {actor}})
+    return new LikesFeedAPI({
+      client,
+      feedParams: {actor: actor as AtIdentifierString},
+    })
   } else if (feedDesc.startsWith('feedgen')) {
     const [__, feed] = feedDesc.split('|')
     return new CustomFeedAPI({
-      agent,
-      feedParams: {feed},
+      client,
+      feedParams: {feed: feed as AtUriString},
       userInterests,
     })
   } else if (feedDesc.startsWith('list')) {
     const [__, list] = feedDesc.split('|')
-    return new ListFeedAPI({agent, feedParams: {list}})
+    return new ListFeedAPI({client, feedParams: {list: list as AtUriString}})
   } else if (feedDesc.startsWith('posts')) {
     const [__, uriList] = feedDesc.split('|')
-    return new PostListFeedAPI({agent, feedParams: {uris: uriList.split(',')}})
+    return new PostListFeedAPI({
+      client,
+      feedParams: {uris: uriList.split(',') as AtUriString[]},
+    })
   } else if (feedDesc === 'demo') {
-    return new DemoFeedAPI({agent})
+    return new DemoFeedAPI({client})
   } else {
     // shouldnt happen
-    return new FollowingFeedAPI({agent})
+    return new FollowingFeedAPI({client})
   }
 }
 

src/state/queries/post-liked-by.ts

@@ -1,4 +1,5 @@
-import {type AppBskyActorDefs, type AppBskyFeedGetLikes} from '@atproto/api'
+import {type AppBskyActorDefs} from '@atproto/api'
+import {type AtUriString} from '@atproto/syntax'
 import {
   type InfiniteData,
   type QueryClient,
@@ -9,7 +10,8 @@ import {
 
 import {STALE} from '#/state/queries'
 import {createQueryKey} from '#/state/queries/util'
-import {useAgent} from '#/state/session'
+import {useAppviewClient} from '#/state/session'
+import {app} from '#/lexicons'
 
 const PAGE_SIZE = 30
 type RQPageParam = string | undefined
@@ -19,22 +21,22 @@ const RQKEY_ROOT = 'liked-by'
 export const RQKEY = (resolvedUri: string) => [RQKEY_ROOT, resolvedUri]
 
 export function useLikedByQuery(resolvedUri: string | undefined) {
-  const agent = useAgent()
+  const client = useAppviewClient()
   return useInfiniteQuery<
-    AppBskyFeedGetLikes.OutputSchema,
+    app.bsky.feed.getLikes.$OutputBody,
     Error,
-    InfiniteData<AppBskyFeedGetLikes.OutputSchema>,
+    InfiniteData<app.bsky.feed.getLikes.$OutputBody>,
     QueryKey,
     RQPageParam
   >({
     queryKey: RQKEY(resolvedUri || ''),
     async queryFn({pageParam}: {pageParam: RQPageParam}) {
-      const res = await agent.getLikes({
-        uri: resolvedUri || '',
+      return await client.call(app.bsky.feed.getLikes, {
+        // the enabled flag prevents this from running until resolvedUri is set
+        uri: (resolvedUri || '') as AtUriString,
         limit: PAGE_SIZE,
         cursor: pageParam,
       })
-      return res.data
     },
     initialPageParam: undefined,
     getNextPageParam: lastPage => lastPage.cursor,
@@ -59,12 +61,14 @@ export const createLikedBySampleQueryKey = (args: {uri: string}) =>
  * perturb the liked-by screen's pagination.
  */
 export function useLikedBySampleQuery({uri}: {uri: string | undefined}) {
-  const agent = useAgent()
+  const client = useAppviewClient()
   return useQuery({
     queryKey: createLikedBySampleQueryKey({uri: uri ?? ''}),
     queryFn: async () => {
-      const res = await agent.getLikes({uri: uri ?? '', limit: SAMPLE_SIZE})
-      return res.data
+      return await client.call(app.bsky.feed.getLikes, {
+        uri: (uri ?? '') as AtUriString,
+        limit: SAMPLE_SIZE,
+      })
     },
     staleTime: STALE.MINUTES.FIVE,
     enabled: !!uri,
@@ -81,7 +85,7 @@ export function* findAllProfilesInQueryData(
   did: string,
 ): Generator<AppBskyActorDefs.ProfileView, void> {
   const queryDatas = queryClient.getQueriesData<
-    InfiniteData<AppBskyFeedGetLikes.OutputSchema>
+    InfiniteData<app.bsky.feed.getLikes.$OutputBody>
   >({
     queryKey: [RQKEY_ROOT],
   })
@@ -98,7 +102,7 @@ export function* findAllProfilesInQueryData(
     }
   }
   const sampleQueryDatas =
-    queryClient.getQueriesData<AppBskyFeedGetLikes.OutputSchema>({
+    queryClient.getQueriesData<app.bsky.feed.getLikes.$OutputBody>({
       queryKey: [likedBySampleQueryKeyRoot],
     })
   for (const [_queryKey, queryData] of sampleQueryDatas) {

src/state/queries/post-quotes.ts

@@ -2,9 +2,9 @@ import {
   type AppBskyActorDefs,
   AppBskyEmbedRecord,
   type AppBskyFeedDefs,
-  type AppBskyFeedGetQuotes,
   AtUri,
 } from '@atproto/api'
+import {type AtUriString} from '@atproto/syntax'
 import {
   type InfiniteData,
   type QueryClient,
@@ -12,7 +12,8 @@ import {
   useInfiniteQuery,
 } from '@tanstack/react-query'
 
-import {useAgent} from '#/state/session'
+import {useAppviewClient} from '#/state/session'
+import {app} from '#/lexicons'
 import {
   didOrHandleUriMatches,
   embedViewRecordToPostView,
@@ -26,22 +27,22 @@ const RQKEY_ROOT = 'post-quotes'
 export const RQKEY = (resolvedUri: string) => [RQKEY_ROOT, resolvedUri]
 
 export function usePostQuotesQuery(resolvedUri: string | undefined) {
-  const agent = useAgent()
+  const client = useAppviewClient()
   return useInfiniteQuery<
-    AppBskyFeedGetQuotes.OutputSchema,
+    app.bsky.feed.getQuotes.$OutputBody,
     Error,
-    InfiniteData<AppBskyFeedGetQuotes.OutputSchema>,
+    InfiniteData<app.bsky.feed.getQuotes.$OutputBody>,
     QueryKey,
     RQPageParam
   >({
     queryKey: RQKEY(resolvedUri || ''),
     async queryFn({pageParam}: {pageParam: RQPageParam}) {
-      const res = await agent.api.app.bsky.feed.getQuotes({
-        uri: resolvedUri || '',
+      return await client.call(app.bsky.feed.getQuotes, {
+        // the enabled flag prevents this from running until resolvedUri is set
+        uri: (resolvedUri || '') as AtUriString,
         limit: PAGE_SIZE,
         cursor: pageParam,
       })
-      return res.data
     },
     initialPageParam: undefined,
     getNextPageParam: lastPage => lastPage.cursor,
@@ -72,7 +73,7 @@ export function* findAllProfilesInQueryData(
   did: string,
 ): Generator<AppBskyActorDefs.ProfileViewBasic, void> {
   const queryDatas = queryClient.getQueriesData<
-    InfiniteData<AppBskyFeedGetQuotes.OutputSchema>
+    InfiniteData<app.bsky.feed.getQuotes.$OutputBody>
   >({
     queryKey: [RQKEY_ROOT],
   })
@@ -99,7 +100,7 @@ export function* findAllPostsInQueryData(
   uri: string,
 ): Generator<AppBskyFeedDefs.PostView, undefined> {
   const queryDatas = queryClient.getQueriesData<
-    InfiniteData<AppBskyFeedGetQuotes.OutputSchema>
+    InfiniteData<app.bsky.feed.getQuotes.$OutputBody>
   >({
     queryKey: [RQKEY_ROOT],
   })

src/state/queries/post-reposted-by.ts

@@ -1,7 +1,5 @@
-import {
-  type AppBskyActorDefs,
-  type AppBskyFeedGetRepostedBy,
-} from '@atproto/api'
+import {type AppBskyActorDefs} from '@atproto/api'
+import {type AtUriString} from '@atproto/syntax'
 import {
   type InfiniteData,
   type QueryClient,
@@ -9,7 +7,8 @@ import {
   useInfiniteQuery,
 } from '@tanstack/react-query'
 
-import {useAgent} from '#/state/session'
+import {useAppviewClient} from '#/state/session'
+import {app} from '#/lexicons'
 
 const PAGE_SIZE = 30
 type RQPageParam = string | undefined
@@ -19,22 +18,22 @@ const RQKEY_ROOT = 'post-reposted-by'
 export const RQKEY = (resolvedUri: string) => [RQKEY_ROOT, resolvedUri]
 
 export function usePostRepostedByQuery(resolvedUri: string | undefined) {
-  const agent = useAgent()
+  const client = useAppviewClient()
   return useInfiniteQuery<
-    AppBskyFeedGetRepostedBy.OutputSchema,
+    app.bsky.feed.getRepostedBy.$OutputBody,
     Error,
-    InfiniteData<AppBskyFeedGetRepostedBy.OutputSchema>,
+    InfiniteData<app.bsky.feed.getRepostedBy.$OutputBody>,
     QueryKey,
     RQPageParam
   >({
     queryKey: RQKEY(resolvedUri || ''),
     async queryFn({pageParam}: {pageParam: RQPageParam}) {
-      const res = await agent.getRepostedBy({
-        uri: resolvedUri || '',
+      return await client.call(app.bsky.feed.getRepostedBy, {
+        // the enabled flag prevents this from running until resolvedUri is set
+        uri: (resolvedUri || '') as AtUriString,
         limit: PAGE_SIZE,
         cursor: pageParam,
       })
-      return res.data
     },
     initialPageParam: undefined,
     getNextPageParam: lastPage => lastPage.cursor,
@@ -47,7 +46,7 @@ export function* findAllProfilesInQueryData(
   did: string,
 ): Generator<AppBskyActorDefs.ProfileView, void> {
   const queryDatas = queryClient.getQueriesData<
-    InfiniteData<AppBskyFeedGetRepostedBy.OutputSchema>
+    InfiniteData<app.bsky.feed.getRepostedBy.$OutputBody>
   >({
     queryKey: [RQKEY_ROOT],
   })