chore: Update docs/private submodule (Phase 39 Level 2 preparation)
Phase 39 documentation complete: - Stage-1/Stage-B representative function selection (5 candidates → top 2) - Primary: array_ext.filter (8/10 score, if-in-loop with conditional push) - Secondary: json_cur.read_quoted_from (7/10 score, comprehensive validation) - JoinIR Frontend extension design (AST lowering, MIR lowering, ~120 lines) - if-in-loop AST lowering with variable tracking (~80 lines) - Loop exit PHI generation (~40 lines) - A/B test plan with 5 test fixtures - Deletion criteria refinement (abstract → concrete checklist) - Verification Procedures: 3 procedures defined - Deletion sequence: Phase 40-1 through 40-4 roadmap - Gap analysis (JoinIR Frontend coverage gaps identified) - collect_assigned_vars: 30% coverage (70% gap: if-in-loop variable capture) - compute_modified_names: 50% coverage (50% gap: conservative strategy) - merge_with_reset_at_merge_with: 80% coverage (20% gap: reset semantics) CURRENT_TASK.md updated with Phase 39 completion Zero functional code changes (docs-only phase) Phase 39 complete: Level 2 deletion concrete implementation plan established Total planned deletion: 115 lines (Phase 40) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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