docs(13-06): complete extensible strategy architecture plan
This commit is contained in:
@@ -0,0 +1,168 @@
|
||||
---
|
||||
phase: 13-llm
|
||||
plan: 06
|
||||
subsystem: semantic-segmentation
|
||||
tags: [strategy-pattern, protocol, unified-segmentation, extensibility, llm]
|
||||
|
||||
# Dependency graph
|
||||
requires:
|
||||
- phase: 13-01
|
||||
provides: video-type-detection
|
||||
- phase: 13-02
|
||||
provides: semantic-boundary-detection
|
||||
- phase: 13-03
|
||||
provides: content-completeness-protection
|
||||
- phase: 13-04
|
||||
provides: title-generation
|
||||
- phase: 13-05
|
||||
provides: chinese-sentence-boundary
|
||||
provides:
|
||||
- SegmentationStrategy Protocol interface for extensibility
|
||||
- UnifiedSegmentationStrategy implementing unified approach (all video types)
|
||||
- SemanticSegmentationEngine using strategy injection pattern
|
||||
- Comprehensive test suite for strategy architecture
|
||||
affects: [13-07-srt-processor-integration]
|
||||
|
||||
# Tech tracking
|
||||
tech-stack:
|
||||
added: []
|
||||
patterns: [strategy-pattern, protocol-interface, dependency-injection, lazy-initialization]
|
||||
|
||||
key-files:
|
||||
created: []
|
||||
modified:
|
||||
- kb_workflow/srt/semantic_engine.py (554 lines)
|
||||
- tests/test_semantic_engine.py (992 lines)
|
||||
|
||||
key-decisions:
|
||||
- "Strategy Pattern with Protocol interface for extensibility (STRAT-01)"
|
||||
- "Unified segmentation strategy for all video types (per user decision, STRAT-02)"
|
||||
- "Strategy injection via constructor for easy testing and extension (STRAT-03)"
|
||||
|
||||
patterns-established:
|
||||
- "Strategy Pattern: SegmentationStrategy Protocol defines interface"
|
||||
- "Unified Strategy: Single strategy for all video types (Phase 13)"
|
||||
- "Dependency Injection: SemanticSegmentationEngine accepts strategy via __init__"
|
||||
- "Lazy Initialization: AI client and fallback segmenter initialized on demand"
|
||||
|
||||
requirements-completed: [STRAT-01, STRAT-02, STRAT-03]
|
||||
|
||||
# Metrics
|
||||
duration: 12min
|
||||
started: 2026-03-21T16:28:24Z
|
||||
completed: 2026-03-21T16:40:15Z
|
||||
tasks: 1
|
||||
files: 2
|
||||
---
|
||||
|
||||
# Phase 13 Plan 06: Extensible Strategy Architecture Summary
|
||||
|
||||
**Strategy Pattern with SegmentationStrategy Protocol interface and UnifiedSegmentationStrategy for all video types**
|
||||
|
||||
## Performance
|
||||
|
||||
- **Duration:** 12 min
|
||||
- **Started:** 2026-03-21T16:28:24Z
|
||||
- **Completed:** 2026-03-21T16:40:15Z
|
||||
- **Tasks:** 1
|
||||
- **Files modified:** 2
|
||||
|
||||
## Accomplishments
|
||||
|
||||
- Implemented SegmentationStrategy Protocol interface defining the strategy contract
|
||||
- Implemented UnifiedSegmentationStrategy with unified approach for all video types (per user decision)
|
||||
- Refactored SemanticSegmentationEngine to use strategy injection pattern
|
||||
- Added comprehensive test suite (10 tests) verifying strategy extensibility
|
||||
- Preserved all existing functionality (video type detection, prompt building, fallback mechanism)
|
||||
|
||||
## Task Commits
|
||||
|
||||
Each task was committed atomically:
|
||||
|
||||
1. **Task 1: Implement extensible strategy architecture** - `0d8ed1f` (feat)
|
||||
|
||||
**Plan metadata:** (pending final commit)
|
||||
|
||||
## Files Created/Modified
|
||||
|
||||
- `kb_workflow/srt/semantic_engine.py` - Added SegmentationStrategy Protocol, UnifiedSegmentationStrategy class, refactored SemanticSegmentationEngine to use strategy pattern (554 lines)
|
||||
- `tests/test_semantic_engine.py` - Added TestStrategyPatternArchitecture (7 tests) and TestStrategyPatternIntegration (3 tests) for comprehensive strategy verification (992 lines)
|
||||
|
||||
## Deviations from Plan
|
||||
|
||||
None - plan executed exactly as specified.
|
||||
|
||||
### Implementation Details
|
||||
|
||||
**SegmentationStrategy Protocol:**
|
||||
- Defines the `segment()` method signature for all strategies
|
||||
- Uses Python's `typing.Protocol` for structural subtyping
|
||||
- Enables runtime duck typing with compile-time type checking
|
||||
|
||||
**UnifiedSegmentationStrategy:**
|
||||
- Implements unified approach for all video types (per user decision)
|
||||
- Video type used only for prompt context, not for strategy selection
|
||||
- Contains all LLM interaction logic moved from SemanticSegmentationEngine
|
||||
- Preserves video type detection, prompt building, and fallback mechanisms
|
||||
|
||||
**SemanticSegmentationEngine:**
|
||||
- Now uses strategy injection via constructor
|
||||
- Defaults to UnifiedSegmentationStrategy when no strategy provided
|
||||
- Delegates all segmentation logic to the strategy
|
||||
- Simplified to a thin wrapper around the strategy
|
||||
|
||||
**Test Coverage:**
|
||||
- TestStrategyPatternArchitecture (7 tests):
|
||||
- Protocol interface definition
|
||||
- UnifiedSegmentationStrategy implementation
|
||||
- SemanticSegmentationEngine uses strategy
|
||||
- Custom strategy injection
|
||||
- Unified strategy applies to all video types
|
||||
- Strategy switching doesn't affect functionality
|
||||
- Strategy extensibility for future types
|
||||
- TestStrategyPatternIntegration (3 tests):
|
||||
- Preserves video type detection
|
||||
- Preserves prompt building
|
||||
- Preserves fallback mechanism
|
||||
|
||||
## Decisions Made
|
||||
|
||||
**Architecture Decision: Strategy Pattern with Protocol Interface**
|
||||
- Rationale: Enables future extension without modifying existing code (Open/Closed Principle)
|
||||
- Protocol provides clear contract while allowing duck typing
|
||||
- Easy to add new strategies (e.g., KnowledgeTypeStrategy, StoryTypeStrategy) in future
|
||||
|
||||
**Design Decision: Unified Strategy for Phase 13**
|
||||
- Per user decision: No type-specific strategies in Phase 13
|
||||
- Video type used only for prompt context, not strategy selection
|
||||
- Architecture ready for type-specific strategies if needed later
|
||||
|
||||
**Implementation Decision: Strategy Injection via Constructor**
|
||||
- Allows easy testing with mock strategies
|
||||
- Supports runtime strategy switching if needed
|
||||
- Follows dependency injection best practices
|
||||
|
||||
## Requirements Completed
|
||||
|
||||
- **STRAT-01:** SegmentationStrategy Protocol interface defined ✅
|
||||
- **STRAT-02:** UnifiedSegmentationStrategy implemented for all video types ✅
|
||||
- **STRAT-03:** Strategy architecture supports extensibility (verified via custom strategy injection test) ✅
|
||||
|
||||
## Next Phase Readiness
|
||||
|
||||
**Ready for Phase 13 Plan 07 (SRTProcessor Integration):**
|
||||
- Strategy architecture complete and tested
|
||||
- SemanticSegmentationEngine provides clean interface
|
||||
- All existing functionality preserved
|
||||
- No blockers or concerns
|
||||
|
||||
**Architecture Benefits:**
|
||||
- Easy to add new strategies without modifying existing code
|
||||
- Testable design with dependency injection
|
||||
- Clear separation of concerns (engine vs strategy)
|
||||
- Ready for future enhancements (type-specific strategies, advanced heuristics)
|
||||
|
||||
---
|
||||
*Phase: 13-llm*
|
||||
*Plan: 06*
|
||||
*Completed: 2026-03-21*
|
||||
Reference in New Issue
Block a user