# Feature Specification: WebKit Memory Optimization

**Feature Branch**: `005-webkit-memory-optimization`  
**Created**: 2025-01-10  
**Status**: Draft  
**Input**: User description: "webkit-memory-optimization"

## Execution Flow (main)
```
1. Parse user description from Input
   → Feature: Reduce WebKit browser memory usage from ~400MB per instance
2. Extract key concepts from description
   → Actors: browser users, system administrators
   → Actions: browse websites with lower memory footprint
   → Data: memory usage metrics, configuration settings
   → Constraints: maintain browsing stability and reasonable performance
3. For each unclear aspect:
   → No major ambiguities identified
4. Fill User Scenarios & Testing section
   → Primary scenario: user browses multiple websites without high memory usage
5. Generate Functional Requirements
   → Each requirement focuses on memory reduction and monitoring capabilities
6. Identify Key Entities
   → Memory configurations, usage statistics, optimization settings
7. Run Review Checklist
   → No [NEEDS CLARIFICATION] markers present
   → Implementation details excluded from spec
8. Return: SUCCESS (spec ready for planning)
```

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## ⚡ Quick Guidelines
- ✅ Focus on WHAT users need and WHY
- ❌ Avoid HOW to implement (no tech stack, APIs, code structure)
- 👥 Written for business stakeholders, not developers

---

## User Scenarios & Testing *(mandatory)*

### Primary User Story
As a browser user, I want the browser to consume significantly less memory (40-60% reduction from current ~400MB per website) so that I can keep more browser instances open on my system without experiencing performance degradation or running out of memory.

### Acceptance Scenarios
1. **Given** a browser instance with default settings, **When** I navigate to a typical website, **Then** the browser should consume no more than 250MB of memory
2. **Given** I have browsed to 50 different web pages, **When** I check memory usage, **Then** memory consumption should remain stable and not exceed reasonable limits due to memory leaks
3. **Given** memory optimization is enabled, **When** the browser approaches memory limits, **Then** it should automatically clean up memory and maintain responsive performance
4. **Given** I configure memory optimization settings, **When** I restart the browser, **Then** my memory preferences should be preserved and applied

### Edge Cases
- What happens when memory pressure is extremely high (system running out of RAM)?
- How does the system handle memory optimization on low-memory devices (<4GB RAM)?
- What occurs when a single webpage requires more memory than the configured limit?

## Requirements *(mandatory)*

### Functional Requirements
- **FR-001**: System MUST reduce per-browser-instance memory usage by 40-60% compared to current baseline (~400MB to 150-250MB)
- **FR-002**: System MUST provide configurable memory limits and thresholds for different usage scenarios
- **FR-003**: Users MUST be able to choose between memory-optimized, balanced, and performance-optimized configurations
- **FR-004**: System MUST automatically trigger memory cleanup when approaching configured memory limits
- **FR-005**: System MUST monitor and report memory usage statistics for transparency
- **FR-006**: System MUST maintain browser stability and prevent crashes during memory optimization
- **FR-007**: System MUST preserve essential browsing functionality (navigation, page rendering, basic JavaScript support)
- **FR-008**: Users MUST be able to manually trigger memory cleanup operations
- **FR-009**: System MUST support process recycling to prevent long-term memory accumulation
- **FR-010**: System MUST log memory optimization events for debugging and monitoring purposes

### Key Entities *(include if feature involves data)*
- **Memory Configuration**: Settings that control memory optimization behavior, including memory limits, cleanup thresholds, caching policies, and garbage collection intervals
- **Memory Statistics**: Real-time and historical data about browser memory usage, including RSS memory, virtual memory, page load counts, and cleanup events
- **Optimization Preset**: Pre-configured sets of memory settings for different use cases (low-memory devices, balanced performance, high-performance scenarios)

---

## Review & Acceptance Checklist
*GATE: Automated checks run during main() execution*

### Content Quality
- [x] No implementation details (languages, frameworks, APIs)
- [x] Focused on user value and business needs
- [x] Written for non-technical stakeholders
- [x] All mandatory sections completed

### Requirement Completeness
- [x] No [NEEDS CLARIFICATION] markers remain
- [x] Requirements are testable and unambiguous  
- [x] Success criteria are measurable
- [x] Scope is clearly bounded
- [x] Dependencies and assumptions identified

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## Execution Status
*Updated by main() during processing*

- [x] User description parsed
- [x] Key concepts extracted
- [x] Ambiguities marked
- [x] User scenarios defined
- [x] Requirements generated
- [x] Entities identified
- [x] Review checklist passed

---