# Implementation Plan: Smarter Aggregation with Sub-Agent Summarization

## Phase 1: Hash-Based Summary Cache [checkpoint: e972cf4]
Focus: Implement file hashing and cache storage

- [x] Task: Research existing file hash implementations in codebase 3218104
- [x] Task: Design cache storage format (file-based vs project state) 3218104
- [x] Task: Implement hash computation for aggregation files 3218104
- [x] Task: Implement summary cache storage and retrieval 3218104
- [x] Task: Add cache invalidation when file content changes 3218104
- [x] Task: Write tests for hash computation and cache 3218104
- [x] Task: Conductor - User Manual Verification 'Phase 1: Hash-Based Summary Cache' e972cf4

## Phase 2: Sub-Agent Summarization
Focus: Implement sub-agent summarization during aggregation

- [~] Task: Audit current aggregate.py flow
- [~] Task: Define summarization prompt strategy for code vs text files
- [~] Task: Implement sub-agent invocation during aggregation
- [~] Task: Handle provider-specific differences in sub-agent calls
- [ ] Task: Write tests for sub-agent summarization
- [ ] Task: Conductor - User Manual Verification 'Phase 2: Sub-Agent Summarization'

## Phase 3: Tiered Aggregation Strategy
Focus: Respect tier-level aggregation configuration

- [ ] Task: Audit how tiers receive context currently
- [ ] Task: Implement tier-level aggregation strategy selection
- [ ] Task: Connect tier strategy to Persona configuration
- [ ] Task: Write tests for tiered aggregation
- [ ] Task: Conductor - User Manual Verification 'Phase 3: Tiered Aggregation Strategy'

## Phase 4: UI Integration
Focus: Expose cache status and controls in UI

- [ ] Task: Add cache status indicator to Files & Media panel
- [ ] Task: Add "Clear Summary Cache" button
- [ ] Task: Add aggregation configuration to Project Settings or AI Settings
- [ ] Task: Write tests for UI integration
- [ ] Task: Conductor - User Manual Verification 'Phase 4: UI Integration'

## Phase 5: Cache Persistence & Optimization
Focus: Ensure cache persists and is performant

- [ ] Task: Implement persistent cache storage to disk
- [ ] Task: Add cache size management (max entries, LRU)
- [ ] Task: Performance testing with large codebases
- [ ] Task: Write tests for persistence
- [ ] Task: Conductor - User Manual Verification 'Phase 5: Cache Persistence & Optimization'