kb-skills/.planning/phases/10-proxy-pool/10-01-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
10-proxy-pool	01	crawler	proxy round-robin yaml-config pydantic playwright		ProxyPool class for multi-proxy management ProxyEntry class for proxy state tracking ProxyPoolConfig class for YAML configuration Round-robin rotation strategy Backward compatible env var loading	11-behavior-masking 12-captcha-handling zhihu-crawler	added patterns Pydantic BaseModel for configuration Lazy recovery check for cooldown Round-robin with index pointer	created modified kb_workflow/crawler/proxy_pool.py tests/test_crawler/test_proxy_pool.py	Use index pointer instead of itertools.cycle for better testability Lazy cooldown check in get_next_proxy() instead of background timer Fallback to first proxy when all unavailable	Pattern: from_yaml() class method for file-based config loading Pattern: from_env_fallback() for backward compatibility	PROXY-01 PROXY-02	3min	2026-03-18

Phase 10 Plan 01: Proxy Pool Core Summary

Proxy pool infrastructure with YAML configuration, round-robin rotation, and backward compatible environment variable fallback

Performance

• Duration: 3 min
• Started: 2026-03-18T08:37:15Z
• Completed: 2026-03-18T08:40:28Z
• Tasks: 2
• Files modified: 2

Accomplishments

• ProxyPool class manages multiple proxies with round-robin rotation
• ProxyEntry tracks proxy state including failures and availability
• YAML configuration loading from ~/.kb_proxies.yaml
• Backward compatible HTTPS_PROXY/HTTP_PROXY environment variable loading
• Lazy cooldown recovery check without background threads

Task Commits

Each task was committed atomically:

1. Task 0: 创建测试脚手架 - bcf1a88 (test)
2. Task 1: 实现 ProxyEntry + ProxyPool 核心类 - c58a7d0 (feat)

Note: TDD tasks have multiple commits (test → feat)

Files Created/Modified

• kb_workflow/crawler/proxy_pool.py - ProxyPool, ProxyEntry, ProxyPoolConfig classes
• tests/test_crawler/test_proxy_pool.py - 11 unit tests for proxy pool functionality

Decisions Made

• Use index pointer (_current_index) for round-robin instead of itertools.cycle for better testability and predictable behavior
• Lazy cooldown check in get_next_proxy() instead of background timer to avoid threading complexity
• When all proxies are unavailable, fallback to first proxy instead of returning None

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None - implementation followed RESEARCH.md pattern examples directly.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Proxy pool core functionality complete
• Ready for Plan 02 (health check and failure recovery)
• Integration with ZhihuCrawler pending

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Phase: 10-proxy-pool Completed: 2026-03-18