feat(platform): Phase 484 thread and forum span metadata (v0.8.447)

Add fromMessage, wasArchived, parentId on read, and forum titleLen/hasTags.

Co-authored-by: Cursor <[email protected]>

README.md

@@ -39,6 +39,8 @@ Expose a single `EventEmitter` API the UI drives over IPC (`apps/pearcord/index.
 
 **v0.8.430 (Phase 467):** `voice.leave` span `end` includes `leavingIsStage`; `screen.start` span `end` includes `label`. Bundle: `npm run test:phase467-voice-stage`. See [VOICE.md](../../docs/VOICE.md), [STAGE_CHANNELS.md](../../docs/STAGE_CHANNELS.md).
 
+**v0.8.447 (Phase 484):** `thread.create` `fromMessage`/`hasRootMessage`; `thread.archive` `wasArchived`/`threadName`; `thread.read` `parentId`/`clearedMentions`; `forum.post` `titleLen`/`hasTags`. UI threads compositor split + hints. Bundle: `npm run test:phase484-threads`. See [MESSAGE_THREADS.md](../../docs/MESSAGE_THREADS.md).
+
 **v0.8.446 (Phase 483):** `guild.search` `includeMesh`/`queryLen`; `pin.list` `pinCount`. UI search compositor split + hints. Bundle: `npm run test:phase483-search`. See [SEARCH.md](../../docs/SEARCH.md).
 
 **v0.8.445 (Phase 482):** `message.send` `hasAttachment`/`hasSticker`; `message.edit` `contentChanged`; `message.delete` `wasOwn`. UI messaging compositor + hints. Bundle: `npm run test:phase482-messaging`. See [MESSAGING.md](../../docs/MESSAGING.md).

index.js

@@ -7598,9 +7598,11 @@ class PearcordPlatform extends EventEmitter {
     const user = this.identity.user
     if (!user || !channelId || !guildId) return
     let threadRead = false
+    let threadParentId = null
     try {
       const ch = await this.db.get(COLLECTIONS.CHANNELS, { guildId, id: channelId })
       threadRead = !!(ch && isThreadChannel(ch))
+      if (threadRead) threadParentId = ch.parentId || null
     } catch {
       /* channel lookup optional */
     }
@@ -7640,8 +7642,10 @@ class PearcordPlatform extends EventEmitter {
         channelId,
         guildId,
         threadRead,
+        parentId: threadParentId,
         isDm: guildId === DM_GUILD_ID,
-        clearedInboxCount
+        clearedInboxCount,
+        clearedMentions: true
       })
     } catch (err) {
       if (threadRead) {
@@ -11023,7 +11027,15 @@ class PearcordPlatform extends EventEmitter {
         targetId: thread.id
       })
       this.emit('channel', merged)
-      span.end({ guildId, threadId: thread.id, tagCount: postTags.length, parentChannelId: forum.id, messageId: message.id })
+      span.end({
+        guildId,
+        threadId: thread.id,
+        tagCount: postTags.length,
+        hasTags: postTags.length > 0,
+        titleLen: postTitle.length,
+        parentChannelId: forum.id,
+        messageId: message.id
+      })
       return { thread: { ...merged, tags: postTags }, message }
     } catch (err) {
       this.log.error('forum.post error', {
@@ -11074,7 +11086,9 @@ class PearcordPlatform extends EventEmitter {
         threadId: thread.id,
         parentId: parent.id,
         parentType: parent.type,
-        threadName: thread.name || threadName
+        threadName: thread.name || threadName,
+        fromMessage: !!messageId,
+        hasRootMessage: !!messageId
       })
       return thread
     } catch (err) {
@@ -11195,7 +11209,14 @@ class PearcordPlatform extends EventEmitter {
         targetId: threadId
       })
       this.emit('channel-update', merged)
-      span.end({ guildId, threadId, archived: !!archived, parentId: ch.parentId || null })
+      span.end({
+        guildId,
+        threadId,
+        archived: !!archived,
+        wasArchived: !!archived,
+        parentId: ch.parentId || null,
+        threadName: ch.name || null
+      })
       return merged
     } catch (err) {
       this.log.error('thread.archive error', {