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Self-evolve log entries from the Apr 18 "What is Claude Code?" slide insertion: descending-sed renumber method, three-column inline-grid layout choice, post-insertion section-divider positions (Agents=8 ... Workflow=34), and the sequencing rule that Edit must run after sed completes — parallel execution causes "file modified since read" errors. Co-Authored-By: Claude <noreply@anthropic.com>