fix(team): preserve task log owners across codex transcripts

src/main/services/team/taskLogs/TranscriptSessionActorContext.ts

@@ -0,0 +1,108 @@
+interface SessionActorContextState {
+  agentId?: string;
+  agentName?: string;
+  isSidechain?: boolean;
+  agentIdAmbiguous: boolean;
+  agentNameAmbiguous: boolean;
+  isSidechainAmbiguous: boolean;
+}
+
+function readNonEmptyString(value: unknown): string | undefined {
+  return typeof value === 'string' && value.trim().length > 0 ? value.trim() : undefined;
+}
+
+function hasBoolean(value: unknown): value is boolean {
+  return typeof value === 'boolean';
+}
+
+function cloneWithContext<T extends Record<string, unknown>>(
+  record: T,
+  updates: Record<string, unknown>
+): T {
+  return {
+    ...record,
+    ...updates,
+  };
+}
+
+export class TranscriptSessionActorContextTracker {
+  private readonly contextsBySessionId = new Map<string, SessionActorContextState>();
+
+  remember(record: Record<string, unknown>): void {
+    const sessionId = readNonEmptyString(record.sessionId);
+    if (!sessionId) {
+      return;
+    }
+
+    const agentId = readNonEmptyString(record.agentId);
+    const agentName = readNonEmptyString(record.agentName);
+    const isSidechain = hasBoolean(record.isSidechain) ? record.isSidechain : undefined;
+    if (!agentId && !agentName && isSidechain === undefined) {
+      return;
+    }
+
+    const current = this.contextsBySessionId.get(sessionId) ?? {
+      agentIdAmbiguous: false,
+      agentNameAmbiguous: false,
+      isSidechainAmbiguous: false,
+    };
+
+    const next: SessionActorContextState = { ...current };
+    if (agentId) {
+      if (current.agentId && current.agentId !== agentId) {
+        next.agentIdAmbiguous = true;
+      } else {
+        next.agentId = agentId;
+      }
+    }
+
+    if (agentName) {
+      if (current.agentName && current.agentName !== agentName) {
+        next.agentNameAmbiguous = true;
+      } else {
+        next.agentName = agentName;
+      }
+    }
+
+    if (isSidechain !== undefined) {
+      if (current.isSidechain !== undefined && current.isSidechain !== isSidechain) {
+        next.isSidechainAmbiguous = true;
+      } else {
+        next.isSidechain = isSidechain;
+      }
+    }
+
+    this.contextsBySessionId.set(sessionId, next);
+  }
+
+  apply<T extends Record<string, unknown>>(record: T): T {
+    const sessionId = readNonEmptyString(record.sessionId);
+    if (!sessionId) {
+      return record;
+    }
+
+    const context = this.contextsBySessionId.get(sessionId);
+    if (!context) {
+      return record;
+    }
+
+    const updates: Record<string, unknown> = {};
+    if (!readNonEmptyString(record.agentId) && context.agentId && !context.agentIdAmbiguous) {
+      updates.agentId = context.agentId;
+    }
+
+    if (!readNonEmptyString(record.agentName) && context.agentName && !context.agentNameAmbiguous) {
+      updates.agentName = context.agentName;
+    }
+
+    if (
+      !hasBoolean(record.isSidechain) &&
+      context.isSidechain !== undefined &&
+      !context.isSidechainAmbiguous
+    ) {
+      updates.isSidechain = context.isSidechain;
+    }
+
+    return Object.keys(updates).length > 0 ? cloneWithContext(record, updates) : record;
+  }
+}

src/main/services/team/taskLogs/activity/BoardTaskActivityRecordBuilder.ts

@@ -51,6 +51,11 @@ function normalizeDisplayRef(value: string): string {
   return value.trim().toLowerCase();
 }
 
+function isConventionalLeadName(value: string): boolean {
+  const normalized = normalizeDisplayRef(value);
+  return normalized === 'team-lead' || normalized === 'lead';
+}
+
 function looksLikeCanonicalTaskId(value: string): boolean {
   return CANONICAL_TASK_ID_PATTERN.test(value.trim());
 }
@@ -245,16 +250,17 @@ function resolveActivityActor(message: RawTaskActivityMessage): BoardTaskActivit
     typeof message.agentName === 'string' && message.agentName.trim().length > 0
       ? message.agentName.trim()
       : undefined;
+  const role: BoardTaskActivityActor['role'] = memberName
+    ? isConventionalLeadName(memberName)
+      ? 'lead'
+      : 'member'
+    : message.isSidechain
+      ? 'member'
+      : 'unknown';
 
   return {
     ...(memberName ? { memberName } : {}),
-    role: memberName
+    role,
-      ? message.isSidechain
-        ? 'member'
-        : 'lead'
-      : message.isSidechain
-        ? 'member'
-        : 'unknown',
     sessionId: message.sessionId,
     ...(message.agentId ? { agentId: message.agentId } : {}),
     isSidechain: message.isSidechain,

src/main/services/team/taskLogs/activity/BoardTaskActivityTranscriptReader.ts

@@ -10,6 +10,7 @@ import {
   type ParsedBoardTaskLink,
   type ParsedBoardTaskToolAction,
 } from '../contract/BoardTaskTranscriptContract';
+import { TranscriptSessionActorContextTracker } from '../TranscriptSessionActorContext';
 
 import { BoardTaskActivityParseCache } from './BoardTaskActivityParseCache';
 
@@ -56,6 +57,12 @@ function asRecord(value: unknown): Record<string, unknown> | null {
   return value && typeof value === 'object' ? (value as Record<string, unknown>) : null;
 }
 
+function lineMayContainTaskActivityOrActorContext(line: string): boolean {
+  return (
+    line.includes('"boardTaskLinks"') || line.includes('"agentName"') || line.includes('"agentId"')
+  );
+}
+
 export class BoardTaskActivityTranscriptReader {
   private readonly cache = new BoardTaskActivityParseCache<RawTaskActivityMessage[]>();
 
@@ -112,6 +119,7 @@ export class BoardTaskActivityTranscriptReader {
 
   private async parseFile(filePath: string): Promise<RawTaskActivityMessage[]> {
     const results: RawTaskActivityMessage[] = [];
+    const actorContextTracker = new TranscriptSessionActorContextTracker();
     const stream = createReadStream(filePath, { encoding: 'utf8' });
     const rl = readline.createInterface({
       input: stream,
@@ -123,7 +131,7 @@ export class BoardTaskActivityTranscriptReader {
     for await (const line of rl) {
       if (!line.trim()) continue;
       lineCount += 1;
-      if (!line.includes('"boardTaskLinks"')) {
+      if (!lineMayContainTaskActivityOrActorContext(line)) {
         if (lineCount % 500 === 0) {
           await yieldToEventLoop();
         }
@@ -134,6 +142,11 @@ export class BoardTaskActivityTranscriptReader {
         const parsed = JSON.parse(line) as unknown;
         const record = asRecord(parsed);
         if (!record) continue;
+        actorContextTracker.remember(record);
+
+        if (!line.includes('"boardTaskLinks"')) {
+          continue;
+        }
 
         const uuid = typeof record.uuid === 'string' ? record.uuid : '';
         const sessionId = typeof record.sessionId === 'string' ? record.sessionId : '';
@@ -142,6 +155,7 @@ export class BoardTaskActivityTranscriptReader {
 
         const boardTaskLinks = parseBoardTaskLinks(record.boardTaskLinks);
         if (boardTaskLinks.length === 0) continue;
+        const contextRecord = actorContextTracker.apply(record);
 
         sourceOrder += 1;
         results.push({
@@ -149,9 +163,10 @@ export class BoardTaskActivityTranscriptReader {
           uuid,
           timestamp,
           sessionId,
-          agentId: typeof record.agentId === 'string' ? record.agentId : undefined,
+          agentId: typeof contextRecord.agentId === 'string' ? contextRecord.agentId : undefined,
-          agentName: typeof record.agentName === 'string' ? record.agentName : undefined,
+          agentName:
-          isSidechain: record.isSidechain === true,
+            typeof contextRecord.agentName === 'string' ? contextRecord.agentName : undefined,
+          isSidechain: contextRecord.isSidechain === true,
           boardTaskLinks,
           boardTaskToolActions: parseBoardTaskToolActions(record.boardTaskToolActions),
           sourceOrder,

src/main/services/team/taskLogs/diagnostics/BoardTaskLogDiagnosticsService.ts

@@ -170,6 +170,12 @@ function isEmptyToolPayload(value: unknown): boolean {
   return false;
 }
 
+function asObjectRecord(value: unknown): Record<string, unknown> | null {
+  return value && typeof value === 'object' && !Array.isArray(value)
+    ? (value as Record<string, unknown>)
+    : null;
+}
+
 function collectEmptyPayloadExamples(
   stream: Awaited<ReturnType<BoardTaskLogStreamService['getTaskLogStream']>>
 ): BoardTaskLogDiagnosticExample[] {
@@ -194,7 +200,7 @@ function collectEmptyPayloadExamples(
           });
         }
 
-        const toolUseResult = message.toolUseResult;
+        const toolUseResult = asObjectRecord(message.toolUseResult);
         if (!toolUseResult) {
           continue;
         }

src/main/services/team/taskLogs/exact/BoardTaskExactLogDetailSelector.ts

@@ -16,11 +16,150 @@ interface TentativeFilteredMessage {
   matchedToolUseId?: string;
 }
 
-function isToolAnchoredOutputMessage(
+interface ToolAnchorScope {
-  message: ParsedMessage,
+  toolUseId?: string;
-  toolUseId: string | undefined
+  assistantUuids: Set<string>;
-): boolean {
+  outputMessageUuids: Set<string>;
-  return Boolean(toolUseId && message.sourceToolUseID === toolUseId);
+}
+
+function messageHasToolUse(message: ParsedMessage, toolUseId: string | undefined): boolean {
+  if (!toolUseId || message.type !== 'assistant' || typeof message.content === 'string') {
+    return false;
+  }
+  return message.content.some((block) => block.type === 'tool_use' && block.id === toolUseId);
+}
+
+function messageHasToolResult(message: ParsedMessage, toolUseId: string | undefined): boolean {
+  if (!toolUseId || typeof message.content === 'string') {
+    return false;
+  }
+  return message.content.some(
+    (block) => block.type === 'tool_result' && block.tool_use_id === toolUseId
+  );
+}
+
+function buildToolAnchorScope(args: {
+  candidate: BoardTaskExactLogBundleCandidate;
+  parsedMessages: ParsedMessage[];
+  explicitMessageIds: Set<string>;
+}): ToolAnchorScope {
+  const toolUseId =
+    args.candidate.anchor.kind === 'tool' ? args.candidate.anchor.toolUseId : undefined;
+  const assistantUuids = new Set<string>();
+  const outputMessageUuids = new Set<string>();
+  if (!toolUseId) {
+    return { assistantUuids, outputMessageUuids };
+  }
+
+  const messagesByUuid = new Map(args.parsedMessages.map((message) => [message.uuid, message]));
+  const messageIndexByUuid = new Map(
+    args.parsedMessages.map((message, index) => [message.uuid, index])
+  );
+
+  const addMatchingAssistant = (uuid: string | null | undefined): void => {
+    if (!uuid) {
+      return;
+    }
+    const message = messagesByUuid.get(uuid);
+    if (message && messageHasToolUse(message, toolUseId)) {
+      assistantUuids.add(message.uuid);
+    }
+  };
+
+  const addNearestPreviousMatchingAssistant = (message: ParsedMessage): void => {
+    const startIndex = messageIndexByUuid.get(message.uuid);
+    if (startIndex === undefined) {
+      return;
+    }
+
+    for (let index = startIndex - 1; index >= 0; index -= 1) {
+      const candidate = args.parsedMessages[index];
+      if (!candidate) {
+        continue;
+      }
+      if (candidate.type !== 'assistant') {
+        continue;
+      }
+      if (messageHasToolUse(candidate, toolUseId)) {
+        assistantUuids.add(candidate.uuid);
+      }
+      return;
+    }
+  };
+
+  addMatchingAssistant(args.candidate.anchor.messageUuid);
+  for (const explicitMessageId of args.explicitMessageIds) {
+    const message = messagesByUuid.get(explicitMessageId);
+    if (!message) {
+      continue;
+    }
+    addMatchingAssistant(message.uuid);
+    addMatchingAssistant(message.sourceToolAssistantUUID);
+    addMatchingAssistant(message.parentUuid);
+    if (message.type === 'user' && messageHasToolResult(message, toolUseId)) {
+      addNearestPreviousMatchingAssistant(message);
+    }
+  }
+
+  let previousAssistantUuid: string | undefined;
+  for (const message of args.parsedMessages) {
+    const referencesTool =
+      message.sourceToolUseID === toolUseId || messageHasToolResult(message, toolUseId);
+    if (
+      referencesTool &&
+      ((message.sourceToolAssistantUUID !== undefined &&
+        assistantUuids.has(message.sourceToolAssistantUUID)) ||
+        (message.parentUuid !== null &&
+          message.parentUuid !== undefined &&
+          assistantUuids.has(message.parentUuid)) ||
+        (message.sourceToolAssistantUUID === undefined &&
+          (message.parentUuid === null || message.parentUuid === undefined) &&
+          previousAssistantUuid !== undefined &&
+          assistantUuids.has(previousAssistantUuid)))
+    ) {
+      outputMessageUuids.add(message.uuid);
+    }
+
+    if (message.type === 'assistant') {
+      previousAssistantUuid = message.uuid;
+    }
+  }
+
+  return { toolUseId, assistantUuids, outputMessageUuids };
+}
+
+function isToolLinkedMessage(message: ParsedMessage, scope: ToolAnchorScope): boolean {
+  const { toolUseId } = scope;
+  if (!toolUseId) {
+    return false;
+  }
+
+  const hasScopedAssistant = scope.assistantUuids.size > 0;
+  if (scope.outputMessageUuids.has(message.uuid)) {
+    return true;
+  }
+
+  if (message.type === 'assistant' && messageHasToolUse(message, toolUseId)) {
+    return !hasScopedAssistant || scope.assistantUuids.has(message.uuid);
+  }
+
+  const referencesTool =
+    message.sourceToolUseID === toolUseId || messageHasToolResult(message, toolUseId);
+  if (!referencesTool) {
+    return false;
+  }
+
+  if (!hasScopedAssistant) {
+    return true;
+  }
+
+  return (
+    (message.sourceToolAssistantUUID !== undefined &&
+      scope.assistantUuids.has(message.sourceToolAssistantUUID)) ||
+    (message.parentUuid !== null &&
+      message.parentUuid !== undefined &&
+      scope.assistantUuids.has(message.parentUuid))
+  );
 }
 
 function noteExactDiagnostic(
@@ -120,16 +259,18 @@ function filterMessageForCandidate(args: {
   message: ParsedMessage;
   candidate: BoardTaskExactLogBundleCandidate;
   explicitMessageIds: Set<string>;
+  toolAnchorScope: ToolAnchorScope;
 }): TentativeFilteredMessage | null {
-  const { message, candidate, explicitMessageIds } = args;
+  const { message, candidate, explicitMessageIds, toolAnchorScope } = args;
   const explicitMessageLinked = explicitMessageIds.has(message.uuid);
   const toolUseId = candidate.anchor.kind === 'tool' ? candidate.anchor.toolUseId : undefined;
-  const anchoredOutputLinked = isToolAnchoredOutputMessage(message, toolUseId);
+  const toolLinked = isToolLinkedMessage(message, toolAnchorScope);
+
+  if (!explicitMessageLinked && !toolLinked) {
+    return null;
+  }
 
   if (typeof message.content === 'string') {
-    if (!explicitMessageLinked && !anchoredOutputLinked) {
-      return null;
-    }
     return {
       original: message,
       filteredContent: message.content,
@@ -142,7 +283,7 @@ function filterMessageForCandidate(args: {
     filteredBlocks = filterAssistantContent(
       message.content,
       toolUseId,
-      explicitMessageLinked || anchoredOutputLinked
+      explicitMessageLinked || toolLinked
     );
   } else if (message.type === 'user') {
     filteredBlocks = filterUserArrayContent(message.content, toolUseId, explicitMessageLinked);
@@ -309,6 +450,11 @@ export class BoardTaskExactLogDetailSelector {
     }
 
     const explicitMessageIds = new Set(relevantRecords.map((record) => record.source.messageUuid));
+    const toolAnchorScope = buildToolAnchorScope({
+      candidate,
+      parsedMessages,
+      explicitMessageIds,
+    });
     const tentative: TentativeFilteredMessage[] = [];
 
     for (const message of parsedMessages) {
@@ -316,6 +462,7 @@ export class BoardTaskExactLogDetailSelector {
         message,
         candidate,
         explicitMessageIds,
+        toolAnchorScope,
       });
       if (filtered) {
         tentative.push(filtered);

src/main/services/team/taskLogs/exact/BoardTaskExactLogStrictParser.ts

@@ -5,6 +5,8 @@ import { createReadStream } from 'fs';
 import * as fs from 'fs/promises';
 import * as readline from 'readline';
 
+import { TranscriptSessionActorContextTracker } from '../TranscriptSessionActorContext';
+
 import { BoardTaskExactLogsParseCache } from './BoardTaskExactLogsParseCache';
 
 import type { ParsedMessage } from '@main/types';
@@ -106,6 +108,7 @@ export class BoardTaskExactLogStrictParser {
 
   private async readStrictFile(filePath: string): Promise<ParsedMessage[]> {
     const results: ParsedMessage[] = [];
+    const actorContextTracker = new TranscriptSessionActorContextTracker();
     const stream = createReadStream(filePath, { encoding: 'utf8' });
     const rl = readline.createInterface({
       input: stream,
@@ -124,7 +127,9 @@ export class BoardTaskExactLogStrictParser {
           continue;
         }
 
-        const parsed = parseJsonlEntry(record as unknown as ChatHistoryEntry);
+        actorContextTracker.remember(record);
+        const contextRecord = actorContextTracker.apply(record);
+        const parsed = parseJsonlEntry(contextRecord as unknown as ChatHistoryEntry);
         if (parsed) {
           results.push(parsed);
         }

src/main/services/team/taskLogs/stream/BoardTaskLogStreamService.ts

@@ -20,6 +20,7 @@ import { OpenCodeTaskLogStreamSource } from './OpenCodeTaskLogStreamSource';
 
 import type { BoardTaskActivityRecord } from '../activity/BoardTaskActivityRecord';
 import type { BoardTaskExactLogDetailCandidate } from '../exact/BoardTaskExactLogTypes';
+import type { TaskLogRuntimeStreamSource } from './TaskLogRuntimeStreamSource';
 import type { ContentBlock, ParsedMessage, ToolUseResultData } from '@main/types';
 import type {
   BoardTaskActivityCategory,
@@ -59,7 +60,7 @@ interface TimeWindow {
 interface StreamLayout {
   participants: BoardTaskLogParticipant[];
   visibleSlices: StreamSlice[];
-  shouldMergeOpenCodeRuntimeFallback?: boolean;
+  shouldMergeRuntimeFallback?: boolean;
 }
 
 const logger = createLogger('Service:BoardTaskLogStreamService');
@@ -90,6 +91,7 @@ const HISTORICAL_BOARD_ACTION_TOOL_NAMES = new Set([
   'task_set_owner',
   'task_unlink',
 ]);
+const READ_ONLY_BOARD_TOOL_NAMES = new Set(['task_get', 'task_get_comment']);
 const TASK_REFERENCE_KEYS = new Set(['task', 'taskid', 'id', 'displayid', 'targetid']);
 
 function emptyResponse(): BoardTaskLogStreamResponse {
@@ -269,6 +271,24 @@ function inferHistoricalActionCategory(canonicalToolName: string): BoardTaskActi
   }
 }
 
+function historicalBoardToolReferencesTask(args: {
+  canonicalToolName: string;
+  input: Record<string, unknown>;
+  resultPayload: unknown;
+  taskRefs: Set<string>;
+}): boolean {
+  const { canonicalToolName, input, resultPayload, taskRefs } = args;
+  if (valueReferencesTask(input, taskRefs)) {
+    return true;
+  }
+
+  if (canonicalToolName === 'task_get' || canonicalToolName === 'task_get_comment') {
+    return false;
+  }
+
+  return valueReferencesTask(resultPayload, taskRefs);
+}
+
 function asObjectRecord(value: unknown): Record<string, unknown> | null {
   return value && typeof value === 'object' && !Array.isArray(value)
     ? (value as Record<string, unknown>)
@@ -519,6 +539,74 @@ function parseJsonLikeString(value: string): unknown {
   }
 }
 
+function formatTaskStatusPayload(payload: Record<string, unknown>): string | null {
+  const displayId =
+    typeof payload.displayId === 'string' && payload.displayId.trim().length > 0
+      ? payload.displayId.trim()
+      : typeof payload.id === 'string' && payload.id.trim().length > 0
+        ? payload.id.trim()
+        : null;
+  const status =
+    typeof payload.status === 'string' && payload.status.trim().length > 0
+      ? payload.status.trim()
+      : null;
+  if (!displayId || !status) {
+    return null;
+  }
+  return `Task ${displayId} ${status}`;
+}
+
+function formatMessageSendPayload(payload: Record<string, unknown>): string | null {
+  const routing = payload.routing as Record<string, unknown> | undefined;
+  const messageRecord =
+    typeof payload.message === 'object' && payload.message !== null
+      ? (payload.message as Record<string, unknown>)
+      : undefined;
+  const deliveryMessage =
+    typeof payload.message === 'string' && payload.message.trim().length > 0
+      ? payload.message.trim()
+      : null;
+  const summary =
+    typeof messageRecord?.summary === 'string' && messageRecord.summary.trim().length > 0
+      ? messageRecord.summary.trim()
+      : typeof routing?.summary === 'string' && routing.summary.trim().length > 0
+        ? routing.summary.trim()
+        : null;
+  const target =
+    typeof messageRecord?.to === 'string' && messageRecord.to.trim().length > 0
+      ? messageRecord.to.trim()
+      : typeof routing?.target === 'string' && routing.target.trim().length > 0
+        ? routing.target.trim()
+        : null;
+  const messageText =
+    typeof messageRecord?.text === 'string' && messageRecord.text.trim().length > 0
+      ? messageRecord.text.trim()
+      : null;
+
+  if (deliveryMessage && summary) {
+    return `${deliveryMessage} - ${summary}`;
+  }
+  if (summary && target) {
+    return `Message sent to ${target} - ${summary}`;
+  }
+  if (summary) {
+    return summary;
+  }
+  if (deliveryMessage) {
+    return deliveryMessage;
+  }
+  if (messageText && target) {
+    return `Message sent to ${target} - ${messageText}`;
+  }
+  if (messageText) {
+    return messageText;
+  }
+  if (target) {
+    return `Message sent to ${target}`;
+  }
+  return null;
+}
+
 function extractBoardToolOutputText(
   toolName: string | undefined,
   parsedPayload: unknown
@@ -527,7 +615,7 @@ function extractBoardToolOutputText(
     return null;
   }
 
-  const normalizedToolName = toolName.trim().toLowerCase();
+  const normalizedToolName = canonicalizeBoardToolName(toolName) ?? toolName.trim().toLowerCase();
   const payload = unwrapAgentTeamsResponsePayload(parsedPayload as Record<string, unknown>);
   if (normalizedToolName === 'task_add_comment' || normalizedToolName === 'task_get_comment') {
     const comment = payload.comment as Record<string, unknown> | undefined;
@@ -536,36 +624,20 @@ function extractBoardToolOutputText(
     }
   }
 
-  if (normalizedToolName === 'sendmessage') {
+  if (normalizedToolName === 'task_complete') {
-    const routing = payload.routing as Record<string, unknown> | undefined;
+    return formatTaskStatusPayload(payload) ?? 'Task completed';
-    const deliveryMessage =
+  }
-      typeof payload.message === 'string' && payload.message.trim().length > 0
-        ? payload.message.trim()
-        : null;
-    const summary =
-      typeof routing?.summary === 'string' && routing.summary.trim().length > 0
-        ? routing.summary.trim()
-        : null;
-    const target =
-      typeof routing?.target === 'string' && routing.target.trim().length > 0
-        ? routing.target.trim()
-        : null;
 
-    if (deliveryMessage && summary) {
+  if (normalizedToolName === 'sendmessage' || normalizedToolName === 'message_send') {
-      return `${deliveryMessage} - ${summary}`;
+    return formatMessageSendPayload(payload);
-    }
+  }
-    if (summary && target) {
+
-      return `Message sent to ${target} - ${summary}`;
+  if (payload.message) {
-    }
+    return formatMessageSendPayload(payload);
-    if (summary) {
+  }
-      return summary;
+
-    }
+  if (payload.status) {
-    if (deliveryMessage) {
+    return formatTaskStatusPayload(payload);
-      return deliveryMessage;
-    }
-    if (target) {
-      return `Message sent to ${target}`;
-    }
   }
 
   return null;
@@ -1303,7 +1375,10 @@ function collectExplicitToolUseIds(
 
 function collectAllowedMemberNames(
   task: TeamTask,
-  records: { actor: { memberName?: string } }[]
+  records: {
+    actor: { memberName?: string };
+    action?: { category?: BoardTaskActivityCategory; canonicalToolName?: string };
+  }[]
 ): Set<string> {
   const allowedNames = new Set<string>();
 
@@ -1312,6 +1387,14 @@ function collectAllowedMemberNames(
   }
 
   for (const record of records) {
+    const canonicalToolName = canonicalizeBoardToolName(record.action?.canonicalToolName);
+    if (
+      record.action?.category === 'read' ||
+      (canonicalToolName !== null && READ_ONLY_BOARD_TOOL_NAMES.has(canonicalToolName))
+    ) {
+      continue;
+    }
+
     if (typeof record.actor.memberName === 'string' && record.actor.memberName.trim().length > 0) {
       allowedNames.add(normalizeMemberName(record.actor.memberName));
     }
@@ -1523,7 +1606,7 @@ export class BoardTaskLogStreamService {
     private readonly chunkBuilder: BoardTaskExactLogChunkBuilder = new BoardTaskExactLogChunkBuilder(),
     private readonly taskReader: TeamTaskReader = new TeamTaskReader(),
     private readonly transcriptSourceLocator: TeamTranscriptSourceLocator = new TeamTranscriptSourceLocator(),
-    private readonly runtimeFallbackSource: OpenCodeTaskLogStreamSource = new OpenCodeTaskLogStreamSource(),
+    private readonly runtimeFallbackSource: TaskLogRuntimeStreamSource = new OpenCodeTaskLogStreamSource(),
     private readonly membersMetaStore: TeamMembersMetaStore = new TeamMembersMetaStore(),
     private readonly configReader: TeamConfigReader = new TeamConfigReader()
   ) {}
@@ -1792,8 +1875,12 @@ export class BoardTaskLogStreamService {
 
           const resultPayload = resolveToolResultPayload(message, toolResult);
           if (
-            !valueReferencesTask(toolCall.input, taskRefs) &&
+            !historicalBoardToolReferencesTask({
-            !valueReferencesTask(resultPayload, taskRefs)
+              canonicalToolName: toolCall.canonicalToolName,
+              input: toolCall.input,
+              resultPayload,
+              taskRefs,
+            })
           ) {
             continue;
           }
@@ -1983,15 +2070,11 @@ export class BoardTaskLogStreamService {
     return {
       participants: buildOrderedParticipants(visibleSlices),
       visibleSlices,
-      shouldMergeOpenCodeRuntimeFallback: await this.shouldMergeOpenCodeRuntimeFallback(
+      shouldMergeRuntimeFallback: await this.shouldMergeRuntimeFallback(teamName, taskId, records),
-        teamName,
-        taskId,
-        records
-      ),
     };
   }
 
-  private async shouldMergeOpenCodeRuntimeFallback(
+  private async shouldMergeRuntimeFallback(
     teamName: string,
     taskId: string,
     records: BoardTaskActivityRecord[]
@@ -2032,7 +2115,7 @@ export class BoardTaskLogStreamService {
     const elapsedMs = Date.now() - startedAt;
     if (elapsedMs >= RUNTIME_FALLBACK_WARN_MS) {
       logger.warn(
-        `Slow OpenCode task-log runtime fallback: team=${teamName} task=${taskId} hit=${Boolean(
+        `Slow task-log runtime fallback: team=${teamName} task=${taskId} hit=${Boolean(
           fallback
         )} elapsedMs=${elapsedMs}`
       );
@@ -2121,7 +2204,7 @@ export class BoardTaskLogStreamService {
       source: 'transcript',
     };
 
-    if (!layout.shouldMergeOpenCodeRuntimeFallback) {
+    if (!layout.shouldMergeRuntimeFallback) {
       return primaryResponse;
     }
 

src/main/services/team/taskLogs/stream/TaskLogRuntimeStreamSource.ts

@@ -0,0 +1,5 @@
+import type { BoardTaskLogStreamResponse } from '@shared/types';
+
+export interface TaskLogRuntimeStreamSource {
+  getTaskLogStream(teamName: string, taskId: string): Promise<BoardTaskLogStreamResponse | null>;
+}

test/main/services/team/BoardTaskActivityEntryBuilder.test.ts

@@ -300,6 +300,51 @@ describe('BoardTaskActivityEntryBuilder', () => {
     expect(entries[0]?.actor.role).toBe('unknown');
   });
 
+  it('keeps named main-session teammates as members instead of forcing lead role', () => {
+    const taskA = makeTask({
+      id: '123e4567-e89b-12d3-a456-426614174000',
+      displayId: 'abcd1234',
+      subject: 'Task A',
+      status: 'in_progress',
+    });
+
+    const messages: RawTaskActivityMessage[] = [
+      {
+        filePath: '/tmp/main-member.jsonl',
+        uuid: 'msg-main-member',
+        timestamp: '2026-04-12T10:00:00.000Z',
+        sessionId: 'session-1',
+        agentName: 'tom',
+        isSidechain: false,
+        sourceOrder: 1,
+        boardTaskLinks: [
+          {
+            schemaVersion: 1,
+            task: { ref: 'abcd1234', refKind: 'display', canonicalId: taskA.id },
+            targetRole: 'subject',
+            linkKind: 'board_action',
+            actorContext: { relation: 'same_task' },
+          },
+        ],
+        boardTaskToolActions: [],
+      },
+    ];
+
+    const entries = new BoardTaskActivityEntryBuilder().buildForTask({
+      teamName: 'demo',
+      targetTask: taskA,
+      tasks: [taskA],
+      messages,
+    });
+
+    expect(entries).toHaveLength(1);
+    expect(entries[0]?.actor).toMatchObject({
+      memberName: 'tom',
+      role: 'member',
+      isSidechain: false,
+    });
+  });
+
   it('never joins action payloads onto execution rows', () => {
     const taskA = makeTask({
       id: '123e4567-e89b-12d3-a456-426614174000',

test/main/services/team/BoardTaskActivityTranscriptReader.test.ts

@@ -94,4 +94,57 @@ describe('BoardTaskActivityTranscriptReader', () => {
       ],
     });
   });
+
+  it('inherits stable session actor context for task-linked Codex projection rows', async () => {
+    const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), 'activity-transcript-reader-actor-'));
+    tempDirs.push(tempDir);
+
+    const filePath = path.join(tempDir, 'codex-session.jsonl');
+    await fs.writeFile(
+      filePath,
+      [
+        JSON.stringify({
+          uuid: 'session-context',
+          sessionId: 'session-codex',
+          timestamp: '2026-04-20T12:00:00.000Z',
+          agentName: 'tom',
+          isSidechain: false,
+          message: { role: 'assistant', content: 'Starting task' },
+        }),
+        JSON.stringify({
+          uuid: 'linked-without-agent-name',
+          sessionId: 'session-codex',
+          timestamp: '2026-04-20T12:01:00.000Z',
+          boardTaskLinks: [
+            {
+              schemaVersion: 1,
+              task: { ref: '12345678', refKind: 'display', canonicalId: 'task-a' },
+              targetRole: 'subject',
+              linkKind: 'board_action',
+              actorContext: { relation: 'same_task' },
+              toolUseId: 'toolu_task_comment',
+            },
+          ],
+          boardTaskToolActions: [
+            {
+              schemaVersion: 1,
+              toolUseId: 'toolu_task_comment',
+              canonicalToolName: 'task_add_comment',
+            },
+          ],
+        }),
+      ].join('\n'),
+      'utf8'
+    );
+
+    const rows = await new BoardTaskActivityTranscriptReader().readFiles([filePath]);
+
+    expect(rows).toHaveLength(1);
+    expect(rows[0]).toMatchObject({
+      uuid: 'linked-without-agent-name',
+      sessionId: 'session-codex',
+      agentName: 'tom',
+      isSidechain: false,
+    });
+  });
 });

test/main/services/team/BoardTaskExactLogDetailSelector.test.ts

@@ -166,6 +166,134 @@ describe('BoardTaskExactLogDetailSelector', () => {
     expect(detail?.filteredMessages[2]?.sourceToolUseID).toBe('tool-1');
   });
 
+  it('scopes repeated tool use ids to the explicit tool-result parent assistant', () => {
+    const record = {
+      ...makeRecord(),
+      id: 'record-reused-tool-id',
+      action: {
+        canonicalToolName: 'task_add_comment',
+        toolUseId: 'item_24',
+        category: 'comment' as const,
+      },
+      source: {
+        filePath: '/tmp/task.jsonl',
+        messageUuid: 'user-target',
+        toolUseId: 'item_24',
+        sourceOrder: 1,
+      },
+    } satisfies BoardTaskActivityRecord;
+    const candidate: BoardTaskExactLogBundleCandidate = {
+      id: 'tool:/tmp/task.jsonl:item_24',
+      timestamp: '2026-04-12T16:00:00.000Z',
+      actor: record.actor,
+      source: {
+        filePath: '/tmp/task.jsonl',
+        messageUuid: 'user-target',
+        toolUseId: 'item_24',
+        sourceOrder: 1,
+      },
+      records: [record],
+      anchor: {
+        kind: 'tool',
+        filePath: '/tmp/task.jsonl',
+        messageUuid: 'user-target',
+        toolUseId: 'item_24',
+      },
+      actionLabel: 'Added a comment',
+      actionCategory: 'comment',
+      canonicalToolName: 'task_add_comment',
+      linkKinds: ['board_action'],
+      targetRoles: ['subject'],
+      canLoadDetail: true,
+      sourceGeneration: 'gen-reused-tool-id',
+    };
+    const parsedMessagesByFile = new Map<string, ParsedMessage[]>([
+      [
+        '/tmp/task.jsonl',
+        [
+          {
+            uuid: 'assistant-target',
+            parentUuid: null,
+            type: 'assistant',
+            timestamp: new Date('2026-04-12T16:00:00.000Z'),
+            role: 'assistant',
+            content: [
+              { type: 'tool_use', id: 'item_24', name: 'task_add_comment', input: { taskId: 'task-a' } } as never,
+            ],
+            toolCalls: [],
+            toolResults: [],
+            isSidechain: true,
+            isMeta: false,
+            isCompactSummary: false,
+          },
+          {
+            uuid: 'user-target',
+            parentUuid: 'assistant-target',
+            type: 'user',
+            timestamp: new Date('2026-04-12T16:00:01.000Z'),
+            role: 'user',
+            content: [
+              { type: 'tool_result', tool_use_id: 'item_24', content: 'target result' } as never,
+            ],
+            toolCalls: [],
+            toolResults: [],
+            sourceToolUseID: 'item_24',
+            sourceToolAssistantUUID: 'assistant-target',
+            toolUseResult: { toolUseId: 'item_24', content: 'target result' },
+            isSidechain: true,
+            isMeta: false,
+            isCompactSummary: false,
+          },
+          {
+            uuid: 'assistant-other',
+            parentUuid: null,
+            type: 'assistant',
+            timestamp: new Date('2026-04-12T16:10:00.000Z'),
+            role: 'assistant',
+            content: [
+              { type: 'tool_use', id: 'item_24', name: 'task_complete', input: { taskId: 'other-task' } } as never,
+            ],
+            toolCalls: [],
+            toolResults: [],
+            isSidechain: true,
+            isMeta: false,
+            isCompactSummary: false,
+          },
+          {
+            uuid: 'user-other',
+            parentUuid: 'assistant-other',
+            type: 'user',
+            timestamp: new Date('2026-04-12T16:10:01.000Z'),
+            role: 'user',
+            content: [
+              { type: 'tool_result', tool_use_id: 'item_24', content: 'other result' } as never,
+            ],
+            toolCalls: [],
+            toolResults: [],
+            sourceToolUseID: 'item_24',
+            sourceToolAssistantUUID: 'assistant-other',
+            toolUseResult: { toolUseId: 'item_24', content: 'other result' },
+            isSidechain: true,
+            isMeta: false,
+            isCompactSummary: false,
+          },
+        ],
+      ],
+    ]);
+
+    const detail = new BoardTaskExactLogDetailSelector().selectDetail({
+      candidate,
+      records: [record],
+      parsedMessagesByFile,
+    });
+
+    expect(detail).not.toBeNull();
+    expect(detail?.filteredMessages.map((message) => message.uuid)).toEqual([
+      'assistant-target',
+      'user-target',
+    ]);
+  });
+
   it('drops stale derived tool metadata when a message-linked row survives filtering', () => {
     const record = {
       ...makeRecord(),

test/main/services/team/BoardTaskExactLogStrictParser.test.ts

@@ -142,4 +142,63 @@ describe('BoardTaskExactLogStrictParser', () => {
       },
     ]);
   });
+
+  it('inherits stable session actor context for Codex-native rows without agentName', async () => {
+    const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), 'exact-log-parser-actor-'));
+    tempDirs.push(tempDir);
+
+    const filePath = path.join(tempDir, 'native-session.jsonl');
+    await fs.writeFile(
+      filePath,
+      [
+        JSON.stringify({
+          parentUuid: null,
+          isSidechain: false,
+          userType: 'external',
+          cwd: '/tmp/project',
+          sessionId: 'session-codex',
+          version: '1.0.0',
+          gitBranch: 'main',
+          agentName: 'tom',
+          type: 'system',
+          uuid: 'session-context',
+          timestamp: '2026-04-19T10:00:00.000Z',
+          subtype: 'init',
+          level: 'info',
+          isMeta: false,
+          content: 'started',
+        }),
+        JSON.stringify({
+          parentUuid: 'session-context',
+          userType: 'external',
+          cwd: '/tmp/project',
+          sessionId: 'session-codex',
+          version: '1.0.0',
+          gitBranch: 'main',
+          type: 'assistant',
+          uuid: 'assistant-without-agent',
+          timestamp: '2026-04-19T10:00:01.000Z',
+          requestId: 'req-1',
+          message: {
+            role: 'assistant',
+            id: 'msg-1',
+            type: 'message',
+            model: 'codex',
+            content: [{ type: 'text', text: 'working' }],
+            stop_reason: null,
+            stop_sequence: null,
+            usage: { input_tokens: 1, output_tokens: 1 },
+          },
+        }),
+      ].join('\n'),
+      'utf8'
+    );
+
+    const parsed = await new BoardTaskExactLogStrictParser().parseFiles([filePath]);
+
+    expect(parsed.get(filePath)?.map((message) => [message.uuid, message.agentName])).toEqual([
+      ['session-context', 'tom'],
+      ['assistant-without-agent', 'tom'],
+    ]);
+  });
 });

test/main/services/team/BoardTaskLogDiagnosticsService.test.ts

@@ -354,4 +354,115 @@ describe('BoardTaskLogDiagnosticsService', () => {
     expect(report.stream.visibleToolNames).toContain('mcp__agent-teams__task_complete');
     expect(report.diagnosis.join(' ')).not.toContain('Only board MCP actions are explicit');
   });
+
+  it('ignores non-record toolUseResult values when checking empty stream payloads', async () => {
+    const task = createTask();
+    const taskReader = {
+      getTasks: async () => [task],
+      getDeletedTasks: async () => [] as TeamTask[],
+    };
+    const transcriptSourceLocator = {
+      listTranscriptFiles: async () => [] as string[],
+    };
+    const recordSource = {
+      getTaskRecords: async () => [],
+    };
+    const strictParser = {
+      parseFiles: async () => new Map(),
+    };
+    const streamService = {
+      getTaskLogStream: async () => ({
+        participants: [],
+        defaultFilter: 'all' as const,
+        segments: [
+          {
+            id: 'segment-1',
+            participantKey: 'member:tom',
+            actor: {
+              memberName: 'tom',
+              role: 'member' as const,
+              sessionId: 'session-tom',
+              isSidechain: false,
+            },
+            startTimestamp: '2026-04-12T15:36:00.000Z',
+            endTimestamp: '2026-04-12T15:36:00.000Z',
+            chunks: [
+              {
+                id: 'chunk-1',
+                rawMessages: [
+                  {
+                    uuid: 'assistant-1',
+                    parentUuid: null,
+                    type: 'assistant',
+                    timestamp: new Date('2026-04-12T15:36:00.000Z'),
+                    role: 'assistant',
+                    content: [
+                      {
+                        type: 'tool_use',
+                        id: 'tool-1',
+                        name: 'mcp__agent-teams__task_add_comment',
+                        input: {},
+                      },
+                    ],
+                    toolCalls: [
+                      {
+                        id: 'tool-1',
+                        name: 'mcp__agent-teams__task_add_comment',
+                        input: {},
+                        isTask: false,
+                      },
+                    ],
+                    toolResults: [],
+                    isSidechain: false,
+                    isMeta: false,
+                    isCompactSummary: false,
+                  },
+                  {
+                    uuid: 'user-1',
+                    parentUuid: 'assistant-1',
+                    type: 'user',
+                    timestamp: new Date('2026-04-12T15:36:01.000Z'),
+                    role: 'user',
+                    content: [
+                      {
+                        type: 'tool_result',
+                        tool_use_id: 'tool-1',
+                        content: 'validation failed',
+                        is_error: true,
+                      },
+                    ],
+                    toolCalls: [],
+                    toolResults: [
+                      {
+                        toolUseId: 'tool-1',
+                        content: 'validation failed',
+                        isError: true,
+                      },
+                    ],
+                    sourceToolUseID: 'tool-1',
+                    toolUseResult: new Error('validation failed'),
+                    isSidechain: false,
+                    isMeta: false,
+                    isCompactSummary: false,
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      }),
+    };
+    const diagnosticsService = new BoardTaskLogDiagnosticsService(
+      taskReader as never,
+      transcriptSourceLocator as never,
+      recordSource as never,
+      strictParser as never,
+      streamService as never,
+    );
+
+    const report = await diagnosticsService.diagnose(TEAM_NAME, TASK_ID);
+
+    expect(report.stream.emptyPayloadExamples).toEqual([]);
+    expect(report.stream.visibleToolNames).toEqual(['mcp__agent-teams__task_add_comment']);
+  });
 });

test/main/services/team/BoardTaskLogStreamService.test.ts

@@ -872,6 +872,259 @@ describe('BoardTaskLogStreamService', () => {
     expect(mergedMessages.map((message) => message.uuid)).toEqual(['c2']);
   });
 
+  it('does not use read-only task readers as inferred execution participants', async () => {
+    const alice = {
+      memberName: 'alice',
+      role: 'member' as const,
+      sessionId: 'session-alice',
+      isSidechain: false,
+    };
+    const readRecord = {
+      ...makeRecord('alice-read', '2026-04-12T16:00:00.000Z', alice, 'tool-read'),
+      action: {
+        canonicalToolName: 'task_get',
+        toolUseId: 'tool-read',
+        category: 'read' as const,
+      },
+    };
+    const readCandidate: BoardTaskExactLogBundleCandidate = {
+      ...makeCandidate('alice-read', '2026-04-12T16:00:00.000Z', alice, 'tool-read'),
+      records: [readRecord],
+      actionCategory: 'read',
+      canonicalToolName: 'task_get',
+    };
+    const aliceRuntimeMessage: ParsedMessage = {
+      uuid: 'alice-bash',
+      parentUuid: null,
+      type: 'assistant',
+      timestamp: new Date('2026-04-12T16:02:00.000Z'),
+      role: 'assistant',
+      content: [
+        {
+          type: 'tool_use',
+          id: 'tool-bash',
+          name: 'Bash',
+          input: { command: 'git diff' },
+        } as never,
+      ],
+      toolCalls: [
+        {
+          id: 'tool-bash',
+          name: 'Bash',
+          input: { command: 'git diff' },
+          isTask: false,
+        },
+      ],
+      toolResults: [],
+      sessionId: 'session-alice',
+      agentName: 'alice',
+      isSidechain: false,
+      isMeta: false,
+      isCompactSummary: false,
+    };
+
+    const recordSource = {
+      getTaskRecords: vi.fn(async () => [readRecord]),
+    };
+    const summarySelector = {
+      selectSummaries: vi.fn(() => [readCandidate]),
+    };
+    const strictParser = {
+      parseFiles: vi.fn(async (filePaths: string[]) =>
+        new Map(
+          filePaths.map((filePath) => [
+            filePath,
+            filePath === '/tmp/alice.jsonl' ? [aliceRuntimeMessage] : [],
+          ])
+        )
+      ),
+    };
+    const detailSelector = {
+      selectDetail: vi.fn(() => ({
+        id: 'alice-read',
+        timestamp: '2026-04-12T16:00:00.000Z',
+        actor: alice,
+        source: readCandidate.source,
+        records: [readRecord],
+        filteredMessages: [makeMessage('alice-read-detail', '2026-04-12T16:00:00.000Z', 'read')],
+      })),
+    };
+    const taskReader = {
+      getTasks: vi.fn(async () => [
+        {
+          id: 'task-a',
+          displayId: 'abcd1234',
+          owner: 'tom',
+          status: 'in_progress',
+          createdAt: '2026-04-12T15:59:00.000Z',
+          updatedAt: '2026-04-12T16:05:00.000Z',
+        },
+      ]),
+      getDeletedTasks: vi.fn(async () => []),
+    };
+    const transcriptSourceLocator = {
+      getContext: vi.fn(async () => ({
+        transcriptFiles: ['/tmp/task.jsonl', '/tmp/alice.jsonl'],
+        config: { members: [{ name: 'team-lead', agentType: 'team-lead' }] },
+      })),
+    };
+    const runtimeFallbackSource = {
+      getTaskLogStream: vi.fn(async () => null),
+    };
+    const buildBundleChunks = vi.fn((messages: ParsedMessage[]) => [{ id: messages[0]?.uuid }]);
+
+    const service = new BoardTaskLogStreamService(
+      recordSource as never,
+      summarySelector as never,
+      strictParser as never,
+      detailSelector as never,
+      { buildBundleChunks } as never,
+      taskReader as never,
+      transcriptSourceLocator as never,
+      runtimeFallbackSource as never,
+      { getMembers: vi.fn(async () => [{ name: 'tom', providerId: 'codex' }]) } as never,
+      { getConfig: vi.fn(async () => null) } as never
+    );
+
+    const response = await service.getTaskLogStream('demo', 'task-a');
+
+    expect(response.segments).toHaveLength(1);
+    expect(response.segments[0]?.participantKey).toBe('member:alice');
+    const mergedMessages = buildBundleChunks.mock.calls[0]?.[0] as ParsedMessage[];
+    expect(mergedMessages.map((message) => message.uuid)).toEqual(['alice-read-detail']);
+  });
+
+  it('does not recover task_get logs from nested task refs in result payloads', async () => {
+    const taskReader = {
+      getTasks: vi.fn(async () => [
+        {
+          id: 'task-a',
+          displayId: 'abcd1234',
+          owner: 'tom',
+          status: 'completed',
+          createdAt: '2026-04-12T16:00:00.000Z',
+          updatedAt: '2026-04-12T16:05:00.000Z',
+        },
+      ]),
+      getDeletedTasks: vi.fn(async () => []),
+    };
+    const transcriptSourceLocator = {
+      getContext: vi.fn(async () => ({
+        transcriptFiles: ['/tmp/lead.jsonl'],
+        config: {
+          members: [{ name: 'team-lead', agentType: 'team-lead' }],
+        },
+      })),
+    };
+    const strictParser = {
+      parseFiles: vi.fn(async () =>
+        new Map<string, ParsedMessage[]>([
+          [
+            '/tmp/lead.jsonl',
+            [
+              {
+                uuid: 'assistant-task-get',
+                parentUuid: null,
+                type: 'assistant' as const,
+                timestamp: new Date('2026-04-12T16:01:00.000Z'),
+                role: 'assistant',
+                content: [
+                  {
+                    type: 'tool_use',
+                    id: 'tool-task-get',
+                    name: 'task_get',
+                    input: { teamName: 'demo', taskId: 'parent-task' },
+                  } as never,
+                ],
+                toolCalls: [
+                  {
+                    id: 'tool-task-get',
+                    name: 'task_get',
+                    input: { teamName: 'demo', taskId: 'parent-task' },
+                    isTask: false,
+                  },
+                ],
+                toolResults: [],
+                isSidechain: false,
+                isMeta: false,
+                isCompactSummary: false,
+              },
+              {
+                uuid: 'user-task-get-result',
+                parentUuid: 'assistant-task-get',
+                type: 'user' as const,
+                timestamp: new Date('2026-04-12T16:01:01.000Z'),
+                role: 'user',
+                content: [
+                  {
+                    type: 'tool_result',
+                    tool_use_id: 'tool-task-get',
+                    content: JSON.stringify({
+                      id: 'parent-task',
+                      displayId: 'parent',
+                      blockedBy: ['task-a'],
+                    }),
+                  } as never,
+                ],
+                toolCalls: [],
+                toolResults: [
+                  {
+                    toolUseId: 'tool-task-get',
+                    content: JSON.stringify({
+                      id: 'parent-task',
+                      displayId: 'parent',
+                      blockedBy: ['task-a'],
+                    }),
+                    isError: false,
+                  },
+                ],
+                sourceToolUseID: 'tool-task-get',
+                sourceToolAssistantUUID: 'assistant-task-get',
+                toolUseResult: {
+                  toolUseId: 'tool-task-get',
+                  content: JSON.stringify({
+                    id: 'parent-task',
+                    displayId: 'parent',
+                    blockedBy: ['task-a'],
+                  }),
+                },
+                isSidechain: false,
+                isMeta: false,
+                isCompactSummary: false,
+              },
+            ],
+          ],
+        ])
+      ),
+    };
+    const summarySelector = {
+      selectSummaries: vi.fn(() => {
+        throw new Error('task_get result payload should not create recovered records');
+      }),
+    };
+    const runtimeFallbackSource = {
+      getTaskLogStream: vi.fn(async () => null),
+    };
+
+    const service = new BoardTaskLogStreamService(
+      { getTaskRecords: vi.fn(async () => []) } as never,
+      summarySelector as never,
+      strictParser as never,
+      undefined as never,
+      undefined as never,
+      taskReader as never,
+      transcriptSourceLocator as never,
+      runtimeFallbackSource as never
+    );
+
+    await expect(service.getTaskLogStream('demo', 'task-a')).resolves.toEqual({
+      participants: [],
+      defaultFilter: 'all',
+      segments: [],
+    });
+    expect(summarySelector.selectSummaries).not.toHaveBeenCalled();
+  });
+
   it('extracts task_add_comment text from json-like tool result payload', async () => {
     const tom = {
       memberName: 'tom',
@@ -1112,4 +1365,137 @@ describe('BoardTaskLogStreamService', () => {
       },
     ]);
   });
+
+  it('sanitizes MCP task_complete and message_send json payloads into readable results', async () => {
+    const tom = {
+      memberName: 'tom',
+      role: 'member' as const,
+      sessionId: 'session-tom',
+      isSidechain: false,
+    };
+    const completeCandidate = {
+      ...makeCandidate('c-complete', '2026-04-12T16:00:00.000Z', tom, 'tool-complete'),
+      actionCategory: 'status' as const,
+      canonicalToolName: 'task_complete',
+    };
+    const sendCandidate = {
+      ...makeCandidate('c-send', '2026-04-12T16:00:01.000Z', tom, 'tool-send'),
+      actionCategory: 'other' as const,
+      canonicalToolName: 'mcp__agent-teams__message_send',
+    };
+
+    const recordSource = {
+      getTaskRecords: vi.fn(async () => [
+        ...completeCandidate.records,
+        ...sendCandidate.records,
+      ]),
+    };
+    const summarySelector = {
+      selectSummaries: vi.fn(() => [completeCandidate, sendCandidate]),
+    };
+    const strictParser = {
+      parseFiles: vi.fn(async () => new Map([['/tmp/task.jsonl', []]])),
+    };
+    const detailSelector = {
+      selectDetail: vi.fn(({ candidate }: { candidate: BoardTaskExactLogBundleCandidate }) => {
+        const isComplete = candidate.id === 'c-complete';
+        const toolUseId = isComplete ? 'tool-complete' : 'tool-send';
+        const toolName = isComplete ? 'task_complete' : 'mcp__agent-teams__message_send';
+        const payload = isComplete
+          ? { id: 'task-a', displayId: 'abcd1234', status: 'completed' }
+          : {
+              deliveredToInbox: true,
+              message: {
+                from: 'tom',
+                to: 'team-lead',
+                text: 'Detailed body',
+                summary: '#abcd1234 done',
+              },
+            };
+
+        return {
+          id: candidate.id,
+          timestamp: candidate.timestamp,
+          actor: tom,
+          source: candidate.source,
+          records: candidate.records,
+          filteredMessages: [
+            {
+              uuid: `${candidate.id}-assistant`,
+              parentUuid: null,
+              type: 'assistant' as const,
+              timestamp: new Date(candidate.timestamp),
+              role: 'assistant',
+              content: [{ type: 'tool_use', id: toolUseId, name: toolName, input: {} } as never],
+              toolCalls: [],
+              toolResults: [],
+              isSidechain: false,
+              isMeta: false,
+              isCompactSummary: false,
+            },
+            {
+              uuid: `${candidate.id}-result`,
+              parentUuid: `${candidate.id}-assistant`,
+              type: 'user' as const,
+              timestamp: new Date(candidate.timestamp),
+              role: 'user',
+              content: [
+                {
+                  type: 'tool_result',
+                  tool_use_id: toolUseId,
+                  content: [{ type: 'text', text: JSON.stringify(payload) } as never],
+                } as never,
+              ],
+              toolCalls: [],
+              toolResults: [
+                {
+                  toolUseId,
+                  content: [{ type: 'text', text: JSON.stringify(payload) }],
+                  isError: false,
+                },
+              ],
+              sourceToolUseID: toolUseId,
+              sourceToolAssistantUUID: `${candidate.id}-assistant`,
+              toolUseResult: {
+                toolUseId,
+                content: JSON.stringify(payload),
+              },
+              isSidechain: false,
+              isMeta: false,
+              isCompactSummary: false,
+            },
+          ],
+        };
+      }),
+    };
+    const buildBundleChunks = vi.fn((messages: ParsedMessage[]) => [{ id: messages[0]?.uuid }]);
+
+    const service = new BoardTaskLogStreamService(
+      recordSource as never,
+      summarySelector as never,
+      strictParser as never,
+      detailSelector as never,
+      { buildBundleChunks } as never,
+    );
+
+    await service.getTaskLogStream('demo', 'task-a');
+
+    const mergedMessages = buildBundleChunks.mock.calls[0]?.[0] as ParsedMessage[];
+    const completeResult = mergedMessages.find((message) => message.uuid === 'c-complete-result');
+    const sendResult = mergedMessages.find((message) => message.uuid === 'c-send-result');
+    expect(completeResult?.toolResults).toEqual([
+      {
+        toolUseId: 'tool-complete',
+        content: 'Task abcd1234 completed',
+        isError: false,
+      },
+    ]);
+    expect(sendResult?.toolResults).toEqual([
+      {
+        toolUseId: 'tool-send',
+        content: 'Message sent to team-lead - #abcd1234 done',
+        isError: false,
+      },
+    ]);
+  });
 });