Added Main Panel Tab Support

[pedramamini]

• MAESTRO: Add AITab interface for multi-tab support
• MAESTRO: Add ClosedTab interface for tab undo functionality
• MAESTRO: Update Session interface with aiTabs, activeTabId, closedTabHistory fields
• MAESTRO: Add migration logic for legacy sessions to aiTabs format
• MAESTRO: Add getActiveTab helper function for AI tab support
• MAESTRO: Add createTab helper function for AI tab support
• MAESTRO: Add closeTab helper function with history tracking
• MAESTRO: Add reopenClosedTab helper function with duplicate detection
• MAESTRO: Add setActiveTab helper function for AI tab support
• MAESTRO: Add getWriteModeTab and getBusyTabs helper functions for AI tab support
• MAESTRO: Add TabBar component for AI multi-tab support
• MAESTRO: Import and integrate TabBar component into MainPanel
• MAESTRO: Update TerminalOutput to use active tab's logs for AI mode
• MAESTRO: Wire up tab handler props from App.tsx to MainPanel
• MAESTRO: Update input handling to use active tab's inputValue
• MAESTRO: Remove session view icon button from main panel header
• MAESTRO: Remove deprecated recentClaudeSessions from Session interface
• MAESTRO: Add TAB_SHORTCUTS constants for AI session tab navigation
• MAESTRO: Add Cmd+T keyboard shortcut for new AI session tab
• MAESTRO: Add Cmd+W keyboard shortcut to close active AI session tab
• MAESTRO: Add Cmd+Shift+T keyboard shortcut to reopen closed AI session tab
• MAESTRO: Add Cmd+] and Cmd+[ keyboard shortcuts for AI session tab navigation
• MAESTRO: Add Cmd+1-8 keyboard shortcuts for direct AI session tab navigation
• MAESTRO: Update resume session to create new AI tab instead of replacing current session
• MAESTRO: Add onOpenSessionAsTab prop to HistoryPanel for tab-based session opening
• MAESTRO: Add AI tab persistence with log truncation and migration support
• MAESTRO: Track AI tab write mode state (busy/idle)
• MAESTRO: Complete tab busy/idle state synchronization for write-mode tracking
• MAESTRO: Disable input when another AI tab is in write mode
• MAESTRO: Add visible waiting indicator pill when another tab is in write mode
• MAESTRO: Allow typing in write-mode locked input while blocking send
• MAESTRO: Fix write-mode lock release to set all busy tabs to idle
• MAESTRO: Add busy tab indicator to bottom of message history
• MAESTRO: Enhance batch processor with per-task usage stats and AI-generated synopses
• MAESTRO: Add multi-tab synchronization for web/mobile interface
• bugfixes in separating streaming logic between tabs
• in deep, must plow forward
• fix: Improve multi-tab state management and prevent duplicate emissions
• fix: Route slash commands through active tab and add per-tab usage tracking
• fix: Use correct tab for toast notifications during parallel execution
• fix: Unify slash command spawn logic between processInput and handleInputKeyDown
• focus tweak

[claude]

Code Review: Multi-Tab Support Feature

This is a substantial PR that adds multi-tab support to the main panel, enabling users to work with multiple AI agent sessions simultaneously. Overall, the implementation is well-structured with good separation of concerns. Here's my detailed feedback:

---

🎯 Architecture & Design - Excellent

Strengths:

• Clean separation of concerns: The tabHelpers.ts utility functions follow functional programming principles with immutable state updates
• Well-documented code: Comprehensive JSDoc comments throughout, especially in tabHelpers.ts (lines 1-524)
• Proper migration logic: Thoughtful migration from legacy session format to aiTabs format in App.tsx:264-315
• Consistent naming: Good use of the standardized vernacular (AI Tab, Session, etc.)
• Type safety: Strong TypeScript interfaces (AITab, ClosedTab, CreateTabOptions, etc.)

Design Patterns:

• Helper functions return result objects ({ tab, session, wasDuplicate }) making state updates explicit
• Portal usage for context menus and overlays prevents z-index stacking issues
• Event-driven architecture for web/mobile sync via WebSocket broadcasts

---

🔒 Security - Good

Strengths:

• Input validation for web server tab operations (sessionId, tabId checks at web-server.ts:1273-1280)
• No use of eval() or innerHTML
• Proper error boundaries in place

Recommendations:

1. Add rate limiting for web tab operations to prevent abuse:

   // In web-server.ts message handler
   case 'new_tab': {
     // Add: Check rate limit per client (e.g., max 10 tabs/minute)
   }

2. Sanitize session/tab names when displaying in UI to prevent XSS through tab names

3. Consider adding maximum tab limit per session to prevent memory exhaustion

---

🐛 Potential Bugs & Edge Cases

Critical:

1. Race condition in duplicate emission prevention (process-manager.ts:305-315):

   • The sessionIdEmitted and resultEmitted flags are reset when? If a process is reused, these flags could prevent legitimate emissions
   • Recommendation: Reset flags when spawning new process or add timestamp-based deduplication

2. Tab state synchronization issue:

   • When a tab is closed on desktop, web clients receive broadcast but there's no confirmation
   • Recommendation: Add acknowledgment pattern or optimistic update with rollback

3. Memory leak potential in TabBar.tsx:83-117:

   • Hover timeout refs are cleared on unmount but isOverOverlayRef could accumulate
   • Recommendation: Clear all refs in cleanup effect

Medium:

4. Drag-and-drop edge case (TabBar.tsx:500-515):

   • No validation that source/target indices are within bounds before reordering
   • Recommendation: Add bounds checking

5. Missing null check in reopenClosedTab (tabHelpers.ts:264):

   • session.aiTabs could theoretically be undefined even after the check on line 226
   • Recommendation: Add defensive check or use default empty array

6. Infinite loop risk in migration logic (App.tsx:266):

   • If session.aiTabs is an empty array (not null/undefined), migration won't run but system expects at least one tab
   • Recommendation: Change condition to !session.aiTabs || session.aiTabs.length === 0

Low:

7. Console.log statements: Found 300+ console statements across 37 files

   • While useful for debugging, production builds should use proper logger
   • Recommendation: Replace with window.maestro.logger calls or add build-time stripping

8. TODO comments found at App.tsx:3082 and useSessionManager.ts:347

   • Both say "TODO: Show error to user" but errors are silently swallowed
   • Recommendation: Add toast notifications for these error cases

---

⚡ Performance Considerations

Concerns:

1. Log truncation during persistence (App.tsx - not visible in diff but mentioned in PR description):

   • Good that logs are truncated for storage, but ensure the truncation limit is configurable
   • Recommendation: Add setting for max log entries per tab (current appears to be 100)

2. Full session broadcasts on tab changes:

   • broadcastTabsChange sends entire aiTabs array with usage stats
   • Recommendation: Consider delta updates for large tab arrays (>10 tabs)

3. O(n) tab lookups:

   • getActiveTab, getWriteModeTab use .find() which is fine for <20 tabs
   • Recommendation: If supporting >50 tabs, consider Map-based lookup

4. React re-renders in TabBar:

   • Every tab re-renders when any tab state changes
   • Recommendation: Use React.memo on Tab component with custom comparison

Strengths:

• Good use of useCallback in TabBar.tsx to prevent unnecessary re-renders
• Portal rendering for overlays prevents re-rendering parent components
• Lazy evaluation with hover delays (400ms) reduces unnecessary work

---

🧪 Test Coverage - Needs Improvement

Missing Tests:

1. Unit tests for tabHelpers.ts:

   • Critical functions like closeTab, reopenClosedTab, createTab have no tests
   • Recommendation: Add Jest tests covering:
     • Closing last tab creates fresh tab
     • Duplicate detection in reopenClosedTab
     • Tab reordering edge cases
     • History limit (MAX_CLOSED_TAB_HISTORY = 25)

2. Integration tests for multi-tab workflows:

   • Create tab → write mode → close → reopen
   • Tab state persistence across app restarts
   • Web/mobile sync when tabs change

3. E2E tests:

   • Keyboard shortcuts (Cmd+T, Cmd+W, Cmd+1-9, Cmd+[/])
   • Drag-and-drop reordering
   • Write-mode locking across tabs

---

📝 Code Quality Notes

Excellent:

• Consistent code style throughout
• Proper TypeScript usage with no any types in critical paths
• Good use of interfaces over types where appropriate
• Meaningful variable names (closedTabEntry, aggregatedInputTokens, etc.)

Minor Issues:

1. Magic number: MAX_CLOSED_TAB_HISTORY = 25 (tabHelpers.ts:8)

   • Consider making this configurable via settings

2. Inconsistent error handling:

   • Some functions return null on error, others return result with error field
   • Recommendation: Standardize on one pattern

3. Comment clarity (process-manager.ts:302-303):

   • Comment says "skip 'assistant' type" but the code doesn't explicitly skip it
   • Recommendation: Add else if (msg.type === 'assistant') { continue; } for clarity

---

🎨 UI/UX Observations

Strengths:

• Browser-style tab design is familiar and intuitive
• Keyboard shortcuts follow platform conventions
• Hover overlays provide quick access to actions
• Visual feedback for busy/starred states

Suggestions:

1. Tab overflow handling: What happens with 50+ tabs? Consider:

   • Horizontal scrolling indicators
   • Tab condensing (show icons only when crowded)
   • Virtual scrolling for extreme cases

2. Confirmation for "Close Others":

   • Potentially destructive action with no confirmation
   • Recommendation: Add confirmation modal

---

✅ Best Practices Adherence

Follows CLAUDE.md conventions:

• ✅ Uses correct terminology (AI Tab, Main Window, etc.)
• ✅ Inline styles for theme colors, Tailwind for layout
• ✅ Proper modal registration with layer stack and priorities
• ✅ Settings persistence pattern in useSettings.ts
• ✅ Uses execFileNoThrow for security (no shell injection)

Room for improvement:

• ⚠️ Many console.log statements should use window.maestro.logger
• ⚠️ TODO comments should be addressed or converted to issues

---

📊 Summary

Category	Rating	Notes
Architecture	⭐⭐⭐⭐⭐	Excellent design with clear separation of concerns
Security	⭐⭐⭐⭐	Good foundations, needs rate limiting and sanitization
Bug Risk	⭐⭐⭐	Several edge cases to address, especially race conditions
Performance	⭐⭐⭐⭐	Well optimized, minor concerns with broadcasts
Test Coverage	⭐⭐	Missing critical unit and integration tests
Code Quality	⭐⭐⭐⭐⭐	Clean, well-documented, type-safe code

Overall: Strong implementation that needs test coverage and edge case hardening before merge.

---

🚀 Recommendations for Merge

Must Fix:

1. Add unit tests for tabHelpers.ts core functions
2. Fix race condition with emission flags in process-manager.ts
3. Address migration logic edge case (empty array vs undefined)
4. Implement error toasts for the TODO comments

Should Fix:

5. Add rate limiting for web tab operations
6. Add bounds checking in drag-and-drop
7. Replace console.log with proper logger in new code
8. Add confirmation for "Close Others" action

Nice to Have:

9. Make max closed tab history configurable
10. Optimize broadcasts for large tab arrays
11. Add tab overflow/condensing UI
12. Memoize Tab component for better performance

---

Great work on this feature! The architecture is solid and the code is clean. With the recommended fixes, this will be production-ready. 🎉

[claude]

Pull Request Review: Multi-Tab Support for AI Sessions

This PR adds 5,531 lines implementing browser-style tabs for AI sessions. Well-structured overall, but critical issues need addressing.

🟢 Strengths

Architecture

• Clean separation: Tab helpers in tabHelpers.ts are pure, testable functions
• Well-documented types: AITab, ClosedTab, QueuedItem interfaces are thorough
• Migration-friendly: Legacy sessions auto-migrate to new tab format
• Immutable patterns: Helper functions return new objects vs mutation

Code Quality

• Comprehensive JSDoc with examples on all helpers
• Strong TypeScript typing, no any types in critical paths
• Great UX: Duplicate detection, write-mode locking, keyboard shortcuts

🟡 Issues & Concerns

1. Security - Command Injection Risk (src/main/index.ts:783-790)

• Extracts claudeSessionId from args without validation
• Recommendation: Add UUID format validation

2. Race Condition (src/main/process-manager.ts:302-314)

• Emission flags checked then set non-atomically
• Recommendation: Set flags BEFORE emitting

3. Memory Leak - Tab Logs (src/renderer/App.tsx)

• Logs accumulate indefinitely, no truncation despite PR description
• Recommendation: Implement log rotation (max 1000 per tab)

4. Inconsistent State Management (src/renderer/App.tsx:2156-2184)

• Multiple sequential state updates cause unnecessary re-renders
• Recommendation: Consolidate to single update

5. Performance (src/renderer/components/TabBar.tsx)

• No React.memo, re-renders on every parent update
• Recommendation: Add memoization with custom comparison

6. Missing Error Handling (src/main/web-server.ts:1318-1355)

• WebSocket handlers don't validate IDs from clients
• Recommendation: Add format validation for untrusted inputs

7. Tab Name Issues (src/renderer/components/TabBar.tsx:44-53)

• No length limits on user-provided names
• Recommendation: Max 50 chars, sanitize special chars

8. Deprecated Field (src/renderer/types/index.ts:190-192)

• Keeping claudeSessionId increases tech debt
• Recommendation: Remove after migration or add timeline

🔴 Critical Issues

9. Write-Mode Lock Race Condition ⚠️ BLOCKER

• Location: src/renderer/App.tsx
• Problem: Locking relies on async React state. Two tabs can acquire lock simultaneously via rapid keyboard shortcuts
• Impact: FILE CORRUPTION from concurrent writes
• Fix: Use useRef for synchronous lock before state updates

10. Missing Test Coverage ⚠️ BLOCKER

• 5,531 lines added, ZERO tests
• Critical gaps: Tab helpers (pure functions!), write-mode locking, migration
• Fix: Add unit tests for tabHelpers.ts, integration tests for locking

📝 Code Style

Follows CLAUDE.md ✅

• Correct terminology (AI Tab)
• No shell execution added
• Settings persistence pattern correct
• Modal priorities added

Minor issues:

• Inconsistent Tab/tab capitalization
• MAX_CLOSED_TAB_HISTORY=25 hardcoded
• TODO comments in production code

🎯 Recommendations

Before Merging (REQUIRED)

1. Add tests for tab helpers and write-mode locking
2. Fix write-mode race condition (Stability, Nuances, Tweaks #9) - data integrity risk
3. Implement tab log truncation (Raychaser/claude path 01 #3)
4. Add UUID validation (Internal Logging #1)

Post-Merge (Track as issues)

1. Optimize TabBar with React.memo
2. Add usage telemetry
3. Tab groups/workspaces
4. Remove deprecated claudeSessionId

📊 Overall Assessment

Code Quality: 7/10
Security: 6/10 (validation gaps)
Performance: 7/10
Test Coverage: 2/10 ⚠️
Documentation: 9/10

Verdict: NEEDS WORK - Write-mode race condition (#9) and missing tests (#10) are blockers. Feature is well-designed, but these issues must be resolved before merge.

Great work on tab helper architecture! 🎉

[claude]

Pull Request Review: Multi-Tab Support

This is a substantial and well-architected feature that adds multi-tab support to Maestro AI sessions.

Strengths

• Excellent separation of concerns with tabHelpers.ts providing pure, well-documented functions
• Comprehensive type safety with new AITab and ClosedTab interfaces
• Smart migration strategy for legacy sessions
• Exceptional JSDoc documentation with examples
• Immutable patterns throughout
• Browser-style UX with drag-and-drop
• Keyboard-first design with comprehensive shortcuts
• Write-mode locking prevents file clobbering
• Desktop to web/mobile tab sync via WebSocket

Issues to Address

1. Race Condition in Session ID Assignment (High Priority)

Location: src/main/process-manager.ts:302-315, App.tsx:1086-1099

Issue: When multiple tabs spawn processes simultaneously, session IDs could be assigned to wrong tabs due to async arrival and fallback to active tab.

Recommendation: Verify all spawn calls consistently encode tab ID in session ID suffix.

2. Memory Management (Medium Priority)

Issue: Each tab stores full conversation logs. 8 tabs x 1000 entries = 4MB+ per session. PR mentions log truncation but implementation needs verification.

Recommendation: Verify truncation is implemented in session save handler.

3. Error Handling (Medium Priority)

Several async operations lack error handlers:

• window.maestro.web.broadcastTabsChange()
• window.maestro.claude.updateSessionStarred()

Recommendation: Add try-catch blocks.

Minor Issues

1. Magic numbers: Extract hardcoded limits to constants
2. Git log COMMIT_START delimiter could appear in messages
3. App.tsx now 2355 lines - consider extracting tab logic to custom hook

Testing Recommendations

1. Multi-tab race conditions with simultaneous messages
2. Session resume conflicts (same session in 2 tabs)
3. Web sync under load
4. Large sessions (1000+ entries per tab)
5. Migration from pre-PR sessions
6. Write-mode locking behavior

Performance

Good: O(1) tab switching, efficient web payload
Concern: setSessions() with many tabs/logs could cause re-render lag

Security

• Uses execFileNoThrow correctly
• WebSocket operations require security token
• Good session isolation

Summary

High-quality work with excellent architecture. Tab helpers are exemplary.

Grade: A- (A+ after session ID routing verification)

Recommendation: Approve with minor changes requested

Main concerns are session ID race condition and memory management verification. Other issues are minor.

Excellent work setting Maestro up for future enhancements!

[claude]

Pull Request Review: Added Main Panel Tab Support

Overview

This is a major feature addition implementing multi-tab support for AI sessions within Maestro. The changes are extensive (+5674/-1286 lines across 39 files) and introduce a significant architectural shift from single-session to multi-tab conversation management.

Strengths

Architecture & Design

✅ Well-structured tab abstraction - The AITab interface and helper functions in tabHelpers.ts provide a clean, functional API for tab management with comprehensive JSDoc documentation.

✅ Comprehensive tab operations - All essential operations are covered: create, close, reopen, navigate, with duplicate detection and history management (max 25 closed tabs).

✅ Write-mode locking - Smart implementation preventing file conflicts when multiple Claude sessions operate on the same project. Only one tab can be in "write mode" (busy state) at a time.

✅ Keyboard-first design - Extensive shortcuts (Cmd+T, Cmd+W, Cmd+Shift+T, Cmd+[/], Cmd+1-9) align with the project's keyboard-first philosophy.

✅ Migration support - Legacy sessions without aiTabs are properly migrated to the new format with sensible defaults.

UI/UX

✅ Browser-like tab interface - Clean Safari/Chrome-inspired design with hover states, drag-to-reorder, and context menus.

✅ Session resumption - Tabs can resume existing Claude sessions from the pool, preventing duplicate sessions via claudeSessionId matching.

✅ Visual feedback - Busy indicators (pulsing dots), star badges, shortcut hints, and elapsed time displays provide excellent user awareness.

Issues & Concerns

🔴 Critical Security Issue

Location: src/main/process-manager.ts:309-315

// Capture session_id from the first message only (prevents duplicate emissions)
// Claude includes session_id in every message, but we only want to emit once
if (msg.session_id && !managedProcess.sessionIdEmitted) {
  managedProcess.sessionIdEmitted = true;
  this.emit('session-id', sessionId, msg.session_id);
}

Problem: The sessionIdEmitted and resultEmitted flags are reset across different processes, but there's no guarantee they won't be re-emitted if the same process is reused. This could lead to duplicate session tracking and state corruption.

Recommendation: Verify that process cleanup properly resets these flags or use a more robust deduplication mechanism (e.g., tracking emitted IDs per session in a Set).

---

🟡 Race Condition Risk

Location: src/main/index.ts:244-248 and src/main/web-server.ts:747

The web server's getSessionDetailCallback now accepts an optional tabId parameter to fetch logs for a specific tab:

server.setGetSessionDetailCallback((sessionId: string, tabId?: string) => {
  const targetTabId = tabId || session.activeTabId;
  const targetTab = session.aiTabs.find((t: any) => t.id === targetTabId) || session.aiTabs[0];
  aiLogs = targetTab?.logs || [];

Problem: While this helps avoid race conditions, there's still a TOCTOU (time-of-check-time-of-use) issue. The activeTabId could change between when the web client requests logs and when they're retrieved.

Recommendation: Consider returning both the tabId used and a timestamp/version number so clients can detect stale data.

---

🟡 Memory Concerns

Location: src/renderer/utils/tabHelpers.ts:177

const MAX_CLOSED_TAB_HISTORY = 25;

Problem: Each ClosedTab entry stores the entire AITab including full conversation logs. With 25 closed tabs, this could consume significant memory, especially for long-running sessions with thousands of log entries.

Recommendation:

• Consider reducing MAX_CLOSED_TAB_HISTORY to 10-15
• Or truncate logs in closed tabs (keep last N entries)
• Add memory usage tracking

---

🟡 Data Persistence Issues

Location: src/renderer/App.tsx (session persistence logic)

The PR description mentions "AI tab persistence with log truncation" but I don't see explicit truncation logic in the persistence code. Long-running sessions with many tabs could lead to very large persisted session files.

Recommendation:

• Implement aggressive log truncation for persisted tabs (e.g., keep last 100 entries per tab)
• Document the truncation strategy
• Consider moving full logs to a separate storage layer

---

🟠 Error Handling Gaps

Location: src/renderer/utils/tabHelpers.ts:224-280 (reopenClosedTab)

The duplicate detection logic assumes claudeSessionId uniqueness but doesn't handle edge cases:

• What if two tabs have the same claudeSessionId but different conversation states?
• What happens if the "duplicate" tab has been closed since the check?

Recommendation: Add defensive checks and potentially emit warnings when duplicates are detected.

---

🟠 Performance Considerations

Location: src/renderer/components/TabBar.tsx:530-577

The tab rendering iterates through all tabs on every render, and each tab has hover timers, portal overlays, and drag handlers. With many tabs (>20), this could cause jank.

Recommendation:

• Use React.memo for the Tab component
• Consider virtualizing tabs if >20 tabs are expected
• Profile rendering performance with 50+ tabs

---

🟠 TypeScript Strictness

Location: Multiple files using any types

// src/main/index.ts
const sessions = sessionsStore.get('sessions', []);
const session = sessions.find((s: any) => s.id === sessionId);

Problem: Extensive use of any defeats TypeScript's safety guarantees and could hide type errors.

Recommendation: Define proper interfaces for persisted session data and use them consistently.

---

🔵 Code Quality Issues

Location: src/renderer/App.tsx (massive 1855 line addition)

The App.tsx file is becoming a god component. With tab management, session management, keyboard shortcuts, and IPC handling all in one place, it's becoming difficult to maintain.

Recommendation:

• Extract tab management logic to a custom hook (useTabManager)
• Extract keyboard shortcut handling to a separate hook
• Consider splitting into smaller components

---

🔵 Testing & Documentation

Missing:

• No unit tests for tabHelpers.ts functions
• No integration tests for tab synchronization
• No tests for migration logic
• Limited error scenario testing

Recommendation:

• Add comprehensive unit tests for all tab operations
• Add tests for edge cases (closing last tab, reopening with duplicates, etc.)
• Document the tab state machine and lifecycle

---

Minor Issues

1. Inconsistent naming: aiTabs vs AI Tabs vs Agent Tabs - standardize terminology
2. Magic numbers: 400ms hover delay in TabBar.tsx:93 should be a named constant
3. Hardcoded limits: max-w-[120px] for tab names in TabBar.tsx:232 should be configurable
4. Missing null checks: Several places assume session.aiTabs exists without checking

---

Security Assessment

✅ No injection vulnerabilities detected - command execution uses safe execFileNoThrow
✅ No XSS risks in tab names or session IDs - React handles escaping
⚠️ Session ID tracking needs hardening (see critical issue above)

---

Performance Impact

🟡 Moderate concern - The multi-tab architecture adds overhead:

• Each tab maintains separate logs, state, and usage stats
• Web server now serializes all tabs for each session
• Tab switching triggers full state updates

Recommendations:

• Profile memory usage with 10-20 active tabs
• Monitor IPC message sizes (tab broadcasts could be large)
• Consider lazy-loading tab logs

---

Adherence to CLAUDE.md

✅ Uses standardized vernacular (AI Terminal, Main Window)
✅ Follows theme color patterns (inline styles for theme colors)
✅ Uses execFileNoThrow for external commands
✅ Settings persistence pattern followed correctly
✅ Modal integration with layer stack

⚠️ App.tsx becoming too complex (violates "keep components focused" principle)

---

Recommendations Summary

Before Merge (if not already merged)

1. ✅ Fix the sessionIdEmitted/resultEmitted tracking in process-manager.ts
2. ✅ Add TypeScript interfaces for persisted session data (remove any)
3. ✅ Implement log truncation for persisted tabs
4. ✅ Add unit tests for tabHelpers.ts

Post-Merge Improvements

1. Refactor App.tsx to extract tab management logic
2. Add integration tests for tab synchronization
3. Profile and optimize tab rendering performance
4. Document the tab architecture in ARCHITECTURE.md

---

Overall Assessment

This is high-quality, production-ready code with a well-thought-out architecture. The tab abstraction is clean, the UX is polished, and the feature is comprehensive. However, there are some concerns around memory usage, state synchronization, and code complexity that should be addressed.

Rating: 8/10 - Excellent feature implementation with room for refinement.

The multi-tab support significantly enhances Maestro's usability and aligns perfectly with the project's vision of managing multiple AI coding assistants simultaneously.

---

Note: Since this PR is already merged, these comments serve as guidance for future improvements and potential bug fixes.