kb-skills/.planning/milestones/v1.4-phases/11-stealth-fingerprinting/11-01-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
11-stealth-fingerprinting	01	crawler	playwright-stealth fingerprint-masking anti-detection zhihu	phase provides none initial stealth module	StealthConfig Pydantic model for browser fingerprint configuration apply_stealth_sync/apply_stealth_async functions for context masking get_default_stealth_config convenience function	zhihu-crawler anti-crawler-detection	added patterns playwright-stealth pydantic-config-model sync-async-api-pair	created modified kb_workflow/crawler/stealth/__init__.py kb_workflow/crawler/stealth/stealth_config.py tests/test_crawler/test_stealth.py tests/test_crawler/conftest.py	Use playwright-stealth library for fingerprint masking (proven solution) Pydantic BaseModel for config validation and IDE support Separate sync/async functions to match Playwright API patterns	Config-first approach: StealthConfig creates Stealth instance via create_stealth() Graceful disable: stealth_enabled=False skips all stealth application	STEALTH-01 STEALTH-02 STEALTH-03 STEALTH-04	3min	2026-03-18

Phase 11 Plan 01: Stealth Fingerprint Masking Summary

Created stealth module using playwright-stealth library with StealthConfig Pydantic model, sync/async apply functions, and 9 passing unit tests

Performance

• Duration: 3 min
• Started: 2026-03-18T15:45:09Z
• Completed: 2026-03-18T15:47:58Z
• Tasks: 2
• Files modified: 4

Accomplishments

• StealthConfig Pydantic model with 17 evasion options (navigator, chrome, webgl, etc.)
• apply_stealth_sync and apply_stealth_async functions for browser context masking
• 9 unit tests covering config defaults, stealth application, and disabled mode
• All 74 crawler tests pass (no regression)

Task Commits

Each task was committed atomically:

1. Task 1 + Task 2: Stealth module and tests (TDD) - e152b8e (feat)

Note: TDD flow combined test and implementation in single commit

Files Created/Modified

• kb_workflow/crawler/stealth/__init__.py - Module entry point, exports StealthConfig and apply functions
• kb_workflow/crawler/stealth/stealth_config.py - StealthConfig model and apply_stealth_sync/async functions
• tests/test_crawler/test_stealth.py - 9 unit tests for stealth module
• tests/test_crawler/conftest.py - Added stealth_config and mock_browser_context fixtures

Decisions Made

• Use playwright-stealth library (external dependency) for fingerprint masking - proven solution with active maintenance
• Pydantic BaseModel for configuration - provides validation, IDE support, and easy serialization
• Separate sync/async functions to match Playwright's API patterns

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Fixed apply_stealth_sync calling wrong method

• Found during: Task 2 (test execution)
• Issue: apply_stealth_sync was calling stealth.apply_stealth_async instead of stealth.apply_stealth_sync
• Fix: Changed to call the correct sync method
• Files modified: kb_workflow/crawler/stealth/stealth_config.py
• Verification: All 9 tests pass
• Committed in: e152b8e (Task commit)

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Total deviations: 1 auto-fixed (1 bug) Impact on plan: Minor fix necessary for correctness. No scope creep.

Issues Encountered

None - TDD flow worked smoothly with RED -> GREEN -> verification

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Stealth module ready for integration into ZhihuCrawler
• Next plan (11-02) will integrate stealth into ZhihuCrawler._start_browser_with_proxy()

Self-Check: PASSED

• All 4 created files verified
• Commit e152b8e verified in git log
• All 9 tests pass
• No regression in existing tests (74 total)

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Phase: 11-stealth-fingerprinting Completed: 2026-03-18