- gsc_signal_delta.py: extract `found` local var; add first branch in verdict_hint chain so a term absent from both GSC windows yields INCONCLUSIVE (not ARTIFACT). Existing ARTIFACT / CONFIRMED-PARTIAL / PARTIAL branches unchanged (elif chain). - test_gsc_signal_delta.py: add test_absent_claim_term_inconclusive asserting found=False and "INCONCLUSIVE" in verdict_hint for a term in neither fixture. - code/CLAUDE.md: one-line surge-tuning note — verdict_hint/in_top_movers are calibrated for upward claims; for drops, inspect top_decliners directly. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KuT3W81t88QQFaxY2ruWv2