a7dbc15878
Implementation: - Add make_pattern2_scope_manager() helper for DRY - Header conditions use ExprLowerer for supported patterns - Legacy fallback for unsupported patterns - Fail-Fast on supported patterns that fail Tests: - 4 new tests (all pass) - test_expr_lowerer_supports_simple_header_condition_i_less_literal - test_expr_lowerer_supports_header_condition_var_less_var - test_expr_lowerer_header_condition_generates_expected_instructions - test_pattern2_header_condition_via_exprlowerer Also: Archive old phase documentation (34k lines removed) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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