kb-skills/.planning/phases/02-platform-skills/02-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
02-platform-skills	02	platforms	bilibili adapter metadata video article retry state-recording	phase provides 01-foundation NetworkError, AuthError, retry_on_network_error, WorkflowStateManager phase provides 02-platform-skills/01 LinkParser, ParsedLink	PlatformAdapter abstract base class BilibiliAdapter for video and article extraction Content type identification from URL Metadata extraction with retry and state recording Markdown content with YAML frontmatter	03-processing-skills 04-analysis	added patterns pytest-asyncio pyyaml adapter-pattern retry-wrapper state-recording-after-retry	created modified kb_pipeline/platforms/base.py kb_pipeline/platforms/bilibili.py tests/test_platforms/test_base.py tests/test_platforms/test_bilibili.py kb_pipeline/__init__.py kb_pipeline/platforms/__init__.py	State recording only after all retries exhausted (not on each retry attempt) Video content returns empty string (handled by ASR in Phase 3) Article content fetching as placeholder (requires additional API implementation)	Adapter pattern: PlatformAdapter base class with abstract methods for content type, metadata, content, filename Retry wrapper: Public method wraps retry-decorated internal method, state recording in outer catch YAML frontmatter: title, author, source_url, platform, content_type, fetched_at	PLAT-01 PLAT-02	8min	2026-03-13

Phase 02: Platform Skills Plan 02 Summary

BilibiliAdapter implementing PlatformAdapter interface with video/article metadata extraction, automatic retry, state recording, and Markdown content formatting with YAML frontmatter

Performance

• Duration: 8 min
• Started: 2026-03-13T10:17:26Z
• Completed: 2026-03-13T10:25:49Z
• Tasks: 4
• Files modified: 7

Accomplishments

• PlatformAdapter abstract base class defining adapter interface contracts
• BilibiliAdapter for B站 video (BV号) and article (CV号) metadata extraction
• Automatic 3-retry mechanism with exponential backoff for network errors
• State recording for failed steps after all retries exhausted
• Markdown content with YAML frontmatter for article content

Task Commits

Each task was committed atomically:

1. Task 1: Write interface contracts for PlatformAdapter base class - 3f42bfa (test)
2. Task 2: Implement BilibiliAdapter for video metadata with state recording - b74f6a0 (feat)
3. Task 3: Implement BilibiliAdapter for article content - d17fbd8 (test)
4. Task 4: Update package exports - included in subsequent commits (feat)

Note: TDD tasks may have multiple commits (test -> feat -> refactor)

Files Created/Modified

• kb_pipeline/platforms/base.py - PlatformAdapter abstract base class with interface contracts
• kb_pipeline/platforms/bilibili.py - BilibiliAdapter implementation for video and article
• kb_pipeline/platforms/__init__.py - Package exports for adapters
• kb_pipeline/__init__.py - Root package exports including BilibiliAdapter
• tests/test_platforms/__init__.py - Test package initialization
• tests/test_platforms/conftest.py - Shared fixtures for platform tests
• tests/test_platforms/test_base.py - PlatformAdapter interface tests
• tests/test_platforms/test_bilibili.py - BilibiliAdapter tests (15 test cases)

Decisions Made

• State recording only after all retries exhausted to avoid multiple records during retry attempts
• Video content fetch returns empty string as ASR transcription is handled separately in Phase 3
• Article content fetching uses placeholder implementation (full implementation requires additional API endpoints)

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Installed pytest-asyncio for async test support

• Found during: Task 2 (running BilibiliAdapter tests)
• Issue: pytest-asyncio not installed, async tests failing with "async def functions are not natively supported"
• Fix: Ran pip install pytest-asyncio
• Files modified: .venv (package installation)
• Verification: Async tests run successfully
• Committed in: b74f6a0 (Task 2 commit)

2. [Rule 3 - Blocking] Installed PyYAML for frontmatter formatting

• Found during: Task 3 (running article content tests)
• Issue: PyYAML not installed, import yaml failing
• Fix: Ran pip install pyyaml
• Files modified: .venv (package installation)
• Verification: YAML frontmatter formatting works correctly
• Committed in: d17fbd8 (Task 3 commit)

3. [Rule 2 - Missing Critical] Fixed retry-state recording pattern

• Found during: Task 2 (testing state recording)
• Issue: State recording called on every retry attempt, causing 3 records for single failure
• Fix: Separated retry logic into internal method, state recording only in outer catch block after all retries exhausted
• Files modified: kb_pipeline/platforms/bilibili.py
• Verification: State recording called exactly once after 3 retries
• Committed in: b74f6a0 (Task 2 commit)

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Total deviations: 3 auto-fixed (2 blocking, 1 missing critical) Impact on plan: All auto-fixes necessary for correctness and test execution. No scope creep.

Issues Encountered

None - all tasks completed as planned with minor dependency installations

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• BilibiliAdapter ready for integration with workflow pipeline
• Video content extraction placeholder ready for ASR implementation in Phase 3
• Article content extraction ready for full API implementation
• Platform adapter pattern established for future platform implementations (Zhihu, etc.)

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Phase: 02-platform-skills Completed: 2026-03-13