Merge branch 'pr-1472' into integration/validation-batch

# Conflicts:
#	plugin/scripts/context-generator.cjs
#	plugin/scripts/mcp-server.cjs
#	plugin/scripts/worker-service.cjs
#	plugin/ui/viewer-bundle.js
#	src/cli/handlers/context.ts
#	src/services/sqlite/SessionStore.ts
#	src/services/sqlite/migrations/runner.ts
#	src/services/worker-service.ts
#	src/shared/SettingsDefaultsManager.ts

src/services/transcripts/processor.ts

@@ -9,9 +9,11 @@ import { writeAgentsMd } from '../../utils/agents-md-utils.js';
 import { resolveFieldSpec, resolveFields, matchesRule } from './field-utils.js';
 import { expandHomePath } from './config.js';
 import type { TranscriptSchema, WatchTarget, SchemaEvent } from './types.js';
+import { normalizePlatformSource } from '../../shared/platform-source.js';
 
 interface SessionState {
   sessionId: string;
+  platformSource: string;
   cwd?: string;
   project?: string;
   lastUserMessage?: string;
@@ -51,6 +53,7 @@ export class TranscriptEventProcessor {
     if (!session) {
       session = {
         sessionId,
+        platformSource: normalizePlatformSource(watch.name),
         pendingTools: new Map()
       };
       this.sessions.set(key, session);
@@ -181,7 +184,7 @@ export class TranscriptEventProcessor {
       sessionId: session.sessionId,
       cwd,
       prompt,
-      platform: 'transcript'
+      platform: session.platformSource
     });
   }
 
@@ -250,7 +253,7 @@ export class TranscriptEventProcessor {
       toolName,
       toolInput: this.maybeParseJson(fields.toolInput),
       toolResponse: this.maybeParseJson(fields.toolResponse),
-      platform: 'transcript'
+      platform: session.platformSource
     });
   }
 
@@ -263,7 +266,7 @@ export class TranscriptEventProcessor {
       cwd: session.cwd ?? process.cwd(),
       filePath,
       edits: Array.isArray(fields.edits) ? fields.edits : undefined,
-      platform: 'transcript'
+      platform: session.platformSource
     });
   }
 
@@ -305,7 +308,7 @@ export class TranscriptEventProcessor {
     await sessionCompleteHandler.execute({
       sessionId: session.sessionId,
       cwd: session.cwd ?? process.cwd(),
-      platform: 'transcript'
+      platform: session.platformSource
     });
     await this.updateContext(session, watch);
     session.pendingTools.clear();
@@ -325,7 +328,8 @@ export class TranscriptEventProcessor {
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({
           contentSessionId: session.sessionId,
-          last_assistant_message: lastAssistantMessage
+          last_assistant_message: lastAssistantMessage,
+          platformSource: session.platformSource
         })
       });
     } catch (error) {
@@ -350,7 +354,7 @@ export class TranscriptEventProcessor {
 
     try {
       const response = await workerHttpRequest(
-        `/api/context/inject?projects=${encodeURIComponent(projectsParam)}`
+        `/api/context/inject?projects=${encodeURIComponent(projectsParam)}&platformSource=${encodeURIComponent(session.platformSource)}`
       );
       if (!response.ok) return;
 

src/services/transcripts/watcher.ts

@@ -117,15 +117,15 @@ export class TranscriptWatcher {
     const files = this.resolveWatchFiles(resolvedPath);
 
     for (const filePath of files) {
-      await this.addTailer(filePath, watch, schema);
+      await this.addTailer(filePath, watch, schema, true);
     }
 
     const rescanIntervalMs = watch.rescanIntervalMs ?? 5000;
-    const timer = setInterval(async () => {
+      const timer = setInterval(async () => {
       const newFiles = this.resolveWatchFiles(resolvedPath);
       for (const filePath of newFiles) {
         if (!this.tailers.has(filePath)) {
-          await this.addTailer(filePath, watch, schema);
+          await this.addTailer(filePath, watch, schema, false);
         }
       }
     }, rescanIntervalMs);
@@ -164,13 +164,20 @@ export class TranscriptWatcher {
     return /[*?[\]{}()]/.test(inputPath);
   }
 
-  private async addTailer(filePath: string, watch: WatchTarget, schema: TranscriptSchema): Promise<void> {
+  private async addTailer(
+    filePath: string,
+    watch: WatchTarget,
+    schema: TranscriptSchema,
+    initialDiscovery: boolean
+  ): Promise<void> {
     if (this.tailers.has(filePath)) return;
 
     const sessionIdOverride = this.extractSessionIdFromPath(filePath);
 
     let offset = this.state.offsets[filePath] ?? 0;
-    if (offset === 0 && watch.startAtEnd) {
+    // `startAtEnd` is useful on worker startup to avoid replaying the full backlog,
+    // but new transcript files must be read from byte 0 or we lose session_meta/user_message.
+    if (offset === 0 && watch.startAtEnd && initialDiscovery) {
       try {
         offset = statSync(filePath).size;
       } catch {