{
  "run_id": "run_438b4b617349",
  "request": {
    "property": "color",
    "material": null,
    "use_case": null
  },
  "team": [
    "planner",
    "reasoning_agent",
    "design_agent",
    "verifier",
    "reviewer_gate"
  ],
  "plan": {
    "agent": "planner",
    "subtasks": [
      "mechanism_explanation",
      "candidate_dossier",
      "verification",
      "review_gate"
    ],
    "summary": "decomposed request for color into 4 subtasks"
  },
  "mechanism_explanation": {
    "phenomenon": "color",
    "mechanism_classes_considered": [
      "electronic_transition",
      "d_d_transition",
      "charge_transfer",
      "band_gap_absorption",
      "plasmon_resonance",
      "scattering",
      "interference",
      "surface_oxidation",
      "impurity_or_defect_center"
    ],
    "inputs_provided": [],
    "inputs_missing": [
      "composition",
      "oxidation_state",
      "band_gap",
      "particle_size",
      "surface_roughness",
      "illumination"
    ],
    "answers": [
      {
        "question": "colour origin for case=None (no seed match)",
        "mechanism_ranking": [
          {
            "rank": 1,
            "mechanism": "No verified seed knowledge or ingested data matches this query. The system declines to assert a mechanism. Route to ingestion + human review.",
            "refs": []
          }
        ],
        "evidence_level": "unverified",
        "uncertainty": "high",
        "citations": [],
        "conflict_status": "none",
        "needs_human_review": true,
        "notes": "Refusal-with-reason template (instruction §8 safe-answer requirement)."
      }
    ]
  },
  "candidate_dossier": {
    "target_phenomenon": "color",
    "material": null,
    "use_case": null,
    "supporting": [
      {
        "question": "Why is copper red-orange?",
        "mechanism_ranking": [
          {
            "rank": 1,
            "mechanism": "Interband transition from filled 3d band to states above the Fermi level begins around ~2.1 eV, so copper absorbs blue/green and strongly reflects red-orange. Reflectivity rises sharply below this threshold.",
            "refs": [
              "ashcroft-mermin",
              "tilley-colour"
            ]
          },
          {
            "rank": 2,
            "mechanism": "Free-electron (Drude) reflectivity provides the high overall metallic reflectance onto which the interband edge is superimposed.",
            "refs": [
              "ashcroft-mermin"
            ]
          }
        ],
        "evidence_level": "review",
        "uncertainty": "low-pending-doi-verification",
        "citations": [
          {
            "ref_id": "ashcroft-mermin",
            "type": "book",
            "authors": [
              "Ashcroft, N. W.",
              "Mermin, N. D."
            ],
            "title": "Solid State Physics",
            "publisher": "Holt, Rinehart and Winston",
            "year": 1976,
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0030839931",
            "doi_verified": false,
            "covers": [
              "band-structure",
              "free-electron",
              "drude",
              "metals",
              "optical-constants"
            ]
          },
          {
            "ref_id": "tilley-colour",
            "type": "book",
            "authors": [
              "Tilley, R. J. D."
            ],
            "title": "Colour and the Optical Properties of Materials",
            "publisher": "Wiley",
            "year": 2011,
            "edition": "2nd",
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0470140765",
            "doi_verified": false,
            "covers": [
              "color",
              "luster",
              "refraction",
              "reflectance",
              "thin-film-interference"
            ]
          }
        ],
        "conflict_status": "none",
        "needs_human_review": false,
        "notes": "Silver's interband edge sits in the UV, so silver reflects the whole visible band -> white/grey."
      },
      {
        "question": "Why does gold have a golden colour and luster?",
        "mechanism_ranking": [
          {
            "rank": 1,
            "mechanism": "Relativistic contraction of the 6s orbital lowers the 5d->6s interband transition energy to ~2.4 eV, shifting absorption into the blue and giving the reflected light its yellow cast. Without relativity gold would look silvery.",
            "refs": [
              "pyykko-1988"
            ]
          },
          {
            "rank": 2,
            "mechanism": "High free-electron density gives high reflectance across the visible -> bright metallic luster; smooth (low-roughness) surface makes it specular.",
            "refs": [
              "ashcroft-mermin",
              "tilley-colour"
            ]
          }
        ],
        "evidence_level": "review",
        "uncertainty": "low-pending-doi-verification",
        "citations": [
          {
            "ref_id": "ashcroft-mermin",
            "type": "book",
            "authors": [
              "Ashcroft, N. W.",
              "Mermin, N. D."
            ],
            "title": "Solid State Physics",
            "publisher": "Holt, Rinehart and Winston",
            "year": 1976,
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0030839931",
            "doi_verified": false,
            "covers": [
              "band-structure",
              "free-electron",
              "drude",
              "metals",
              "optical-constants"
            ]
          },
          {
            "ref_id": "pyykko-1988",
            "type": "journal_review",
            "authors": [
              "Pyykko, P."
            ],
            "title": "Relativistic effects in structural chemistry",
            "journal": "Chemical Reviews",
            "year": 1988,
            "volume": "88",
            "pages": "563-594",
            "trust_tier": 1,
            "doi_or_isbn": "10.1021/cr00085a006",
            "doi_verified": false,
            "covers": [
              "relativistic-effects",
              "gold-color",
              "mercury",
              "6s-contraction"
            ]
          },
          {
            "ref_id": "tilley-colour",
            "type": "book",
            "authors": [
              "Tilley, R. J. D."
            ],
            "title": "Colour and the Optical Properties of Materials",
            "publisher": "Wiley",
            "year": 2011,
            "edition": "2nd",
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0470140765",
            "doi_verified": false,
            "covers": [
              "color",
              "luster",
              "refraction",
              "reflectance",
              "thin-film-interference"
            ]
          }
        ],
        "conflict_status": "none",
        "needs_human_review": false,
        "notes": null
      },
      {
        "question": "Why can gold nanoparticles appear red or purple?",
        "mechanism_ranking": [
          {
            "rank": 1,
            "mechanism": "Localized surface plasmon resonance (Mie theory): conduction electrons resonate at ~520-550 nm for small spheres, absorbing green and transmitting/scattering red. Size, shape and aggregation shift the resonance, giving red->purple->blue.",
            "refs": [
              "mie-1908",
              "tilley-colour"
            ]
          }
        ],
        "evidence_level": "review",
        "uncertainty": "low-pending-doi-verification",
        "citations": [
          {
            "ref_id": "mie-1908",
            "type": "journal_primary",
            "authors": [
              "Mie, G."
            ],
            "title": "Beitraege zur Optik trueber Medien, speziell kolloidaler Metalloesungen",
            "journal": "Annalen der Physik",
            "year": 1908,
            "volume": "330",
            "pages": "377-445",
            "trust_tier": 1,
            "doi_or_isbn": "10.1002/andp.19083300302",
            "doi_verified": false,
            "covers": [
              "plasmon",
              "nanoparticle-color",
              "scattering"
            ]
          },
          {
            "ref_id": "tilley-colour",
            "type": "book",
            "authors": [
              "Tilley, R. J. D."
            ],
            "title": "Colour and the Optical Properties of Materials",
            "publisher": "Wiley",
            "year": 2011,
            "edition": "2nd",
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0470140765",
            "doi_verified": false,
            "covers": [
              "color",
              "luster",
              "refraction",
              "reflectance",
              "thin-film-interference"
            ]
          }
        ],
        "conflict_status": "none",
        "needs_human_review": false,
        "notes": "Bulk gold is yellow by reflection; nano gold colour is a plasmonic/scattering effect — a different mechanism class entirely."
      },
      {
        "question": "Why does an oxide film change a metal's colour (e.g. tempered steel, titanium)?",
        "mechanism_ranking": [
          {
            "rank": 1,
            "mechanism": "Thin-film interference: light reflected from the oxide top and metal/oxide interface interferes; the reinforced/cancelled wavelengths depend on film thickness and n, so colour cycles with thickness.",
            "refs": [
              "tilley-colour"
            ]
          }
        ],
        "evidence_level": "review",
        "uncertainty": "low-pending-doi-verification",
        "citations": [
          {
            "ref_id": "tilley-colour",
            "type": "book",
            "authors": [
              "Tilley, R. J. D."
            ],
            "title": "Colour and the Optical Properties of Materials",
            "publisher": "Wiley",
            "year": 2011,
            "edition": "2nd",
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0470140765",
            "doi_verified": false,
            "covers": [
              "color",
              "luster",
              "refraction",
              "reflectance",
              "thin-film-interference"
            ]
          }
        ],
        "conflict_status": "none",
        "needs_human_review": false,
        "notes": null
      },
      {
        "question": "Why does doping a semiconductor change its colour and electrical behaviour?",
        "mechanism_ranking": [
          {
            "rank": 1,
            "mechanism": "Dopants add carriers (n/p) shifting the Fermi level and conductivity; heavy doping adds free-carrier (Burstein-Moss) and intra-gap absorption that can shift the apparent colour/absorption edge.",
            "refs": [
              "kittel-issp",
              "ashcroft-mermin"
            ]
          }
        ],
        "evidence_level": "review",
        "uncertainty": "medium",
        "citations": [
          {
            "ref_id": "ashcroft-mermin",
            "type": "book",
            "authors": [
              "Ashcroft, N. W.",
              "Mermin, N. D."
            ],
            "title": "Solid State Physics",
            "publisher": "Holt, Rinehart and Winston",
            "year": 1976,
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0030839931",
            "doi_verified": false,
            "covers": [
              "band-structure",
              "free-electron",
              "drude",
              "metals",
              "optical-constants"
            ]
          },
          {
            "ref_id": "kittel-issp",
            "type": "book",
            "authors": [
              "Kittel, C."
            ],
            "title": "Introduction to Solid State Physics",
            "publisher": "Wiley",
            "year": 2004,
            "edition": "8th",
            "trust_tier": 1,
            "doi_or_isbn": "ISBN 978-0471415268",
            "doi_verified": false,
            "covers": [
              "crystal",
              "phonons",
              "band-gap",
              "magnetism",
              "lattice"
            ]
          }
        ],
        "conflict_status": "none",
        "needs_human_review": false,
        "notes": null
      }
    ],
    "opposing": [],
    "unknown": [
      "commercial_risk.cost: no cited data",
      "commercial_risk.toxicity: no cited data",
      "commercial_risk.synthesis_feasibility: no cited data",
      "commercial_risk.regulatory: no cited data",
      "commercial_risk.supply_chain: no cited data"
    ],
    "commercial_risk": {
      "scores": {
        "cost": "unknown",
        "toxicity": "unknown",
        "synthesis_feasibility": "unknown",
        "regulatory": "unknown",
        "supply_chain": "unknown"
      },
      "notes": {
        "cost": "no cited data — routed to ingestion/human review",
        "toxicity": "no cited data — routed to ingestion/human review",
        "synthesis_feasibility": "no cited data — routed to ingestion/human review",
        "regulatory": "no cited data — routed to ingestion/human review",
        "supply_chain": "no cited data — routed to ingestion/human review"
      },
      "needs_human_review": true
    },
    "needs_human_review": true
  },
  "verification": {
    "agent": "verifier",
    "citation_problems": [],
    "conflicts": [],
    "passed": true,
    "summary": "OK; 0 conflict(s)"
  },
  "review": {
    "agent": "reviewer_gate",
    "needs_human_review": true,
    "summary": "routed to human review"
  },
  "needs_human_review": true,
  "disclaimers": [
    "All factual statements carry citations + evidence_level + uncertainty.",
    "Unknown items are routed to ingestion/human review, never guessed.",
    "Not a commercial green light: requires source verification + experimental confirmation."
  ]
}