Plan 02 Summary: item-creator-extraction

What Was Done

Extracted ItemCreator (601 lines, 50+ methods) into two focused sub-modules following the FeedFetcher extraction pattern from Phase 3.

Files Created

• lib/source_monitor/items/item_creator/entry_parser.rb (390 lines) -- All field extraction methods (extract_guid, extract_url, extract_authors, etc.) plus utility methods (string_or_nil, safe_integer, split_keywords, etc.)
• lib/source_monitor/items/item_creator/content_extractor.rb (113 lines) -- Feed content processing through readability (process_feed_content, wrap_content_for_readability, etc.)

Files Modified

• lib/source_monitor/items/item_creator.rb -- Slimmed from 601 to 174 lines. Now contains only orchestration logic (find/create/update items), Result struct, constants, and forwarding methods for backward compatibility with tests.

Line Counts

File	Before	After
item_creator.rb	601	174
entry_parser.rb	--	390
content_extractor.rb	--	113
Total	601	677

Architecture

• EntryParser receives source:, entry:, and content_extractor: -- exposes parse returning full attributes hash
• ContentExtractor receives source: -- exposes process_feed_content(raw_content, title:)
• ItemCreator delegates build_attributes to entry_parser.parse via lazy accessor
• Forwarding methods on ItemCreator preserve backward compatibility for tests that call private methods via send

Test Results

• ItemCreator tests: 78 runs, 258 assertions, 0 failures, 0 errors
• Full suite: 757 runs, 2630 assertions, 0 errors, 0 failures related to extraction (1 pre-existing paginator test-ordering sensitivity)
• RuboCop: 363 files inspected, no offenses detected

Success Criteria

• ItemCreator main file under 300 lines (174)
• Two sub-modules created: entry_parser.rb, content_extractor.rb
• Public API unchanged -- ItemCreator.call(source:, entry:) returns Result struct
• All existing tests pass without modification
• Full test suite passes (757 runs, 0 errors)
• RuboCop passes on all modified/new files