{"anchors": [], "axis_coords": {"axis": "optics", "dimensions": ["conservation_balance", "physical_substance", "reasoning", "time_sequence"]}, "content_hash": "7e0717dfc554e1bf116bdaff5cf8b954433b90828db989b14638337163818bc8", "gate_results": [{"details": {"broken_at": null, "confirmed_steps": 1, "gap_at": null, "steps": 1, "verdict": "HOLDS"}, "gate": "RED", "reasons": ["derivation verdict: HOLDS"], "status": "PASS"}], "overall": "PASS", "schema_version": "2.0", "verifier_results": [{"data": {"claim": "sin θ₂ = (1·sin30)/1.5 → θ₂ ≈ 19.47°", "domain": "optics", "link_ok": true, "uses": []}, "detail": "optics.snell_law: θ₂ = arcsin((1.0/1.5)·sin(30.0°)) = 19.471° (matches claim 19.471220634490688)", "name": "sn1", "status": "CONFIRMED"}]}