{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T09:49:00Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 18.8,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09503-f9f7-7f00-8a37-66188d551136\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: folk instrument\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 80.6,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09503-f9e9-7c52-b44b-f9d55235367b\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: folk instrument\nRegistry id: vr.tr.folk-instrument\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: ("
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:43:02+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:25+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q13135638",
    "registryId": "vr.tr.folk-instrument",
    "name": "folk instrument",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q13135638/",
  "model": {
    "registry_id": "vr.tr.folk-instrument",
    "name": "folk instrument",
    "purpose": "Enable an agent to recognise a folk instrument through its sound-producing design and documented cultural use, assess its playable condition, and determine appropriate use and care.",
    "definition": "A folk instrument is a musical instrument associated with the customary music-making of a community, whose classification as folk depends on cultural use and transmission rather than a particular construction or sound-producing mechanism.",
    "scope_statement": "This model owns the characteristics of physical musical instruments identified with particular folk traditions, extending the general musical-instrument concept with community attribution, local variants, customary performance practices, and culturally appropriate handling.",
    "in_scope": [
      "Community-specific identification as a folk instrument, including local names and disputed classifications",
      "Sound-producing mechanism, acoustic configuration, tuning, and playable range",
      "Materials, construction traditions, maker attribution, and locally recognised variants",
      "Playing techniques, ensemble roles, and customary performance contexts",
      "Playable condition, instrument-specific maintenance, and restrictions on handling or modification"
    ],
    "out_of_scope": [
      "The general musical-instrument model and properties inherited without modification",
      "Musical compositions, song texts, and repertoire as independent creative works",
      "Performers, makers, and communities as independently modelled people or social entities",
      "Musical traditions, rituals, and performances as independent practices or events",
      "Commercial product lines, sales listings, and ownership transactions",
      "Recordings, software instruments, and digital sound libraries"
    ],
    "distinguishing_features": [
      "Identification requires a documented relationship to a named musical community or tradition; rustic appearance or natural materials alone do not establish folk status.",
      "The object has a sound-producing or sound-controlling role in musical practice; a miniature, depiction, or decorative imitation requires separate identification.",
      "Folk attribution is recorded for a specified context, allowing the same instrument type to participate in folk, classical, religious, or popular practices.",
      "Handmaking, antiquity, and acoustic operation are not assumed requirements; manufactured or amplified variants require assessment against the relevant tradition.",
      "Instrument type, regional variant, maker model, and individual specimen remain distinct, so one specimen's tuning or decoration does not define the entire kind."
    ],
    "characteristics": [
      {
        "name": "Community and tradition attribution",
        "kind": "relation",
        "unit_or_values": "Named communities and musical traditions, with attribution source and relevant period",
        "why_it_matters": "Establishes the contextual basis for calling the instrument a folk instrument."
      },
      {
        "name": "Local names and variant identity",
        "kind": "category",
        "unit_or_values": "Names with language, locality, transliteration, and variant designation",
        "why_it_matters": "Helps distinguish local variants without treating every different name as a separate instrument."
      },
      {
        "name": "Sound-producing mechanism",
        "kind": "category",
        "unit_or_values": "Vibrating strings, membranes, instrument body, air column, electronic generation, or documented combination",
        "why_it_matters": "Connects identification to playing technique, acoustic behaviour, and maintenance needs."
      },
      {
        "name": "Acoustic configuration",
        "kind": "category",
        "unit_or_values": "Instrument-specific arrangement of strings, reeds, pipes, membranes, resonators, drones, and sympathetic elements",
        "why_it_matters": "Separates variants whose similar names or appearance conceal different musical capabilities."
      },
      {
        "name": "Tuning and pitch organisation",
        "kind": "category",
        "unit_or_values": "Local tuning designation, pitch relationships, reference pitch where applicable, and adjustable or fixed elements",
        "why_it_matters": "Supports compatibility decisions without assuming equal temperament or a universal concert pitch."
      },
      {
        "name": "Usable pitch range",
        "kind": "measurement",
        "unit_or_values": "Lowest and highest usable fundamental frequency in Hz, with technique and tuning conditions; not applicable where discrete pitch is not meaningful",
        "why_it_matters": "Records practical melodic capability while distinguishing it from incidental sounds."
      },
      {
        "name": "Musically significant dimensions",
        "kind": "measurement",
        "unit_or_values": "Applicable vibrating length, bore dimensions, membrane diameter, or resonator dimensions in mm",
        "why_it_matters": "Supports variant identification, ergonomic assessment, and replacement-part matching."
      },
      {
        "name": "Materials and construction",
        "kind": "category",
        "unit_or_values": "Materials and joining or forming methods by sound-producing component",
        "why_it_matters": "Links construction choices to sound, repair compatibility, and environmental sensitivity."
      },
      {
        "name": "Performance role",
        "kind": "relation",
        "unit_or_values": "Documented relation to solo, melody, drone, rhythm, accompaniment, signalling, or other locally named roles",
        "why_it_matters": "Explains what the instrument contributes within its particular musical practice."
      },
      {
        "name": "Playable condition",
        "kind": "state",
        "unit_or_values": "Untested, playable for stated purpose, playable with limitations, unplayable, or retained for nonplaying use",
        "why_it_matters": "Separates functional suitability from appearance and cultural importance."
      },
      {
        "name": "Handling and performance conditions",
        "kind": "relation",
        "unit_or_values": "Attributed customary requirements concerning players, occasions, access, handling, recording, or modification",
        "why_it_matters": "Makes decisions sensitive to the instrument's documented community context."
      }
    ],
    "affordances": [
      "Identify a candidate instrument and explain the evidence supporting its local name and folk attribution.",
      "Compare regional or historical variants through acoustic construction and documented community distinctions.",
      "Assess suitability for a stated tuning, ensemble role, playing technique, and performance occasion.",
      "Determine whether tuning, playing, amplification, or handling is appropriate for a particular specimen and context.",
      "Prepare a maintenance or repair proposal that accounts for acoustic function, construction, and culturally significant features.",
      "Record unresolved attribution or condition questions and identify the practitioner, maker, or custodian best placed to resolve them."
    ],
    "agent_conduct": {
      "may": [
        "Describe folk instruments and their communities, citing ethnomusicology sources.",
        "Explain how folk classification depends on use."
      ],
      "must_not": [
        "Treat folk instruments as primitive.",
        "Sell imitations as authentic heritage.",
        "Export protected materials or heritage instruments unlawfully.",
        "Misattribute instruments to the wrong culture."
      ],
      "requires_human": [
        "Recording or selling a community's music."
      ]
    },
    "ethics": {
      "considerations": [
        "Folk music belongs to communities.",
        "Some materials come from protected species."
      ],
      "affected_parties": [
        "Folk musicians",
        "Communities"
      ]
    },
    "owners": {
      "steward": "The musicians and communities who keep the instruments.",
      "master_systems": []
    },
    "what_it_is_for": [
      "Folk instruments are encountered in community celebrations, customary performances, domestic music-making and cultural collections.",
      "They support accompaniment, dance, storytelling and the transmission of musical knowledge between generations.",
      "Their cultural role depends on documented community practice rather than construction alone."
    ],
    "standards_and_regulation": [
      "The Harmonized System nomenclature issued by the World Customs Organization classifies musical instruments under Chapter 92 for international trade."
    ],
    "visual_identification": [
      "Strings, membranes, air channels or resonating solid bodies provide cues to the instrument's sound-producing mechanism.",
      "Construction materials, ornament and wear patterns can support comparison with documented examples from a particular musical tradition.",
      "No single visible feature establishes folk status, which requires evidence of cultural use and transmission."
    ],
    "failure_modes_and_hazards": [
      "High sound levels can damage hearing during playing or close observation.",
      "Loose components, sharp edges or failed tensioned parts can injure players and handlers.",
      "Unsuitable humidity, temperature or handling can damage materials and reduce playability.",
      "Incorrect cultural attribution or inappropriate use can misrepresent a community's practices."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q13135638: folk instrument",
      "url": "https://www.wikidata.org/wiki/Q13135638",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Folk instrument",
      "url": "https://en.wikipedia.org/wiki/Folk_instrument",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "tradition-and-identity",
        "name": "Tradition and identity",
        "description": "Establishes what the instrument is called and the contexts in which it is recognised as a folk instrument.",
        "rationale": "Folk attribution depends on musical communities and usage, so physical resemblance alone cannot settle identity.",
        "layers": [
          {
            "id": "community-attribution",
            "name": "Community attribution",
            "description": "Records the basis and limits of identification with particular traditions.",
            "findings": [
              {
                "id": "basis-of-folk-identification",
                "name": "Basis of folk identification",
                "description": "Capture who identifies the instrument with which tradition, when, and on what evidence.",
                "questions": [
                  {
                    "text": "Which practitioners, communities, or documented accounts identify this instrument as part of a named folk tradition?",
                    "kind": "provenance",
                    "id": "basis-of-folk-identification-q01"
                  },
                  {
                    "text": "Does that identification apply to the instrument type generally, a local variant, or its use in a particular context?",
                    "kind": "boundary",
                    "id": "basis-of-folk-identification-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "names-and-variants",
            "name": "Names and variants",
            "description": "Relates local terminology to meaningful distinctions among instrument forms.",
            "findings": [
              {
                "id": "local-identity-boundaries",
                "name": "Local identity boundaries",
                "description": "Record local names and distinctions without assuming that shared names mean identical instruments or different names mean different kinds.",
                "questions": [
                  {
                    "text": "What names are used in the relevant languages and localities, and what does each name include?",
                    "kind": "definition",
                    "id": "local-identity-boundaries-q01"
                  },
                  {
                    "text": "Which construction, sound, or performance differences lead practitioners to recognise a separate variant?",
                    "kind": "boundary",
                    "id": "local-identity-boundaries-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "sound-and-tuning",
        "name": "Sound and tuning",
        "description": "Describes how the instrument produces sound and organises pitch, rhythm, and timbre.",
        "rationale": "An agent must understand the instrument's actual musical capabilities without imposing a tuning system or acoustic template.",
        "layers": [
          {
            "id": "sound-generation",
            "name": "Sound generation",
            "description": "Identifies vibrating elements, excitation methods, and resonating components.",
            "findings": [
              {
                "id": "acoustic-working-principle",
                "name": "Acoustic working principle",
                "description": "Record how the player initiates and shapes vibration, including interactions among melody, drone, or sympathetic components where present.",
                "questions": [
                  {
                    "text": "Which elements vibrate, how are they excited, and which components amplify or modify their sound?",
                    "kind": "definition",
                    "id": "acoustic-working-principle-q01"
                  },
                  {
                    "text": "Which dimensions and component arrangements most strongly distinguish this variant's acoustic behaviour?",
                    "kind": "measurement",
                    "id": "acoustic-working-principle-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "pitch-and-timbre",
            "name": "Pitch and timbre",
            "description": "Records tuning conventions and the sound qualities relevant to the intended practice.",
            "findings": [
              {
                "id": "contextual-sound-target",
                "name": "Contextual sound target",
                "description": "Capture the expected pitch relationships, range, and timbral qualities for a stated tradition and playing purpose.",
                "questions": [
                  {
                    "text": "What tuning or pitch relationships are expected, and which elements can the player or maker adjust?",
                    "kind": "definition",
                    "id": "contextual-sound-target-q01"
                  },
                  {
                    "text": "Under a stated tuning and technique, what usable range or rhythmic and timbral responses can be demonstrated?",
                    "kind": "measurement",
                    "id": "contextual-sound-target-q02"
                  },
                  {
                    "text": "Which apparent buzzes, beating effects, or pitch variations are intended features rather than faults?",
                    "kind": "boundary",
                    "id": "contextual-sound-target-q03"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "making-and-material-history",
        "name": "Making and material history",
        "description": "Connects construction and subsequent alterations to local instrument-making knowledge.",
        "rationale": "Materials and modifications can affect musical function and cultural identification in ways that visual cataloguing misses.",
        "layers": [
          {
            "id": "construction-practice",
            "name": "Construction practice",
            "description": "Documents the materials and techniques that define or differentiate the instrument.",
            "findings": [
              {
                "id": "significant-construction-choices",
                "name": "Significant construction choices",
                "description": "Distinguish construction features treated as essential by practitioners from accepted material or manufacturing alternatives.",
                "questions": [
                  {
                    "text": "Which materials and construction techniques are documented for the relevant variant and period?",
                    "kind": "provenance",
                    "id": "significant-construction-choices-q01"
                  },
                  {
                    "text": "Which substitutions preserve its recognised identity, and which are regarded as changing the instrument?",
                    "kind": "boundary",
                    "id": "significant-construction-choices-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "maker-and-alterations",
            "name": "Maker and alterations",
            "description": "Relates an individual specimen to its maker and known changes.",
            "findings": [
              {
                "id": "specimen-construction-history",
                "name": "Specimen construction history",
                "description": "Capture maker attribution, repairs, component replacements, and adaptations with their supporting evidence.",
                "questions": [
                  {
                    "text": "What evidence supports the specimen's maker, place of manufacture, and approximate date?",
                    "kind": "provenance",
                    "id": "specimen-construction-history-q01"
                  },
                  {
                    "text": "Which repairs or adaptations have changed its tuning, sound, playing technique, or locally recognised identity?",
                    "kind": "boundary",
                    "id": "specimen-construction-history-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "performance-and-custom",
        "name": "Performance and custom",
        "description": "Places playing techniques and musical roles within their documented social settings.",
        "rationale": "Physical playability does not establish suitability for a musical role or appropriateness for a particular occasion.",
        "layers": [
          {
            "id": "technique-and-musical-role",
            "name": "Technique and musical role",
            "description": "Records how practitioners play the instrument and coordinate it with others.",
            "findings": [
              {
                "id": "performance-compatibility",
                "name": "Performance compatibility",
                "description": "Connect posture, excitation, articulation, and tuning to the instrument's intended ensemble or solo role.",
                "questions": [
                  {
                    "text": "Which playing techniques and musical roles characterise its use in the named tradition?",
                    "kind": "definition",
                    "id": "performance-compatibility-q01"
                  },
                  {
                    "text": "What tuning, accessories, player skills, and sound balance are needed for the proposed performance?",
                    "kind": "action",
                    "id": "performance-compatibility-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "customary-use-conditions",
            "name": "Customary use conditions",
            "description": "Captures attributed expectations concerning access, occasions, and treatment.",
            "findings": [
              {
                "id": "contextual-use-authority",
                "name": "Contextual use authority",
                "description": "Record any relevant customary conditions and whose account establishes them, without presuming universal restrictions.",
                "questions": [
                  {
                    "text": "Who can explain whether particular players, occasions, handling practices, or recording activities have customary conditions?",
                    "kind": "provenance",
                    "id": "contextual-use-authority-q01"
                  },
                  {
                    "text": "What consultation or permission, if any, is needed for the proposed use of this specimen?",
                    "kind": "action",
                    "id": "contextual-use-authority-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "playability-and-continuity",
        "name": "Playability and continuity",
        "description": "Assesses functional condition and plans care consistent with the instrument's intended future.",
        "rationale": "Restoring sound, retaining historical material, and sustaining customary use may call for different interventions.",
        "layers": [
          {
            "id": "functional-assessment",
            "name": "Functional assessment",
            "description": "Tests the relevant sound-producing components against a stated musical purpose.",
            "findings": [
              {
                "id": "condition-against-intended-use",
                "name": "Condition against intended use",
                "description": "Separate expected musical characteristics from damage or deterioration that limits use.",
                "questions": [
                  {
                    "text": "Which cracks, leaks, loose joints, worn strings, reed changes, or membrane defects are applicable to this instrument and affect its response?",
                    "kind": "measurement",
                    "id": "condition-against-intended-use-q01"
                  },
                  {
                    "text": "Can the specimen be tested by playing without worsening damage, and who is qualified to make that assessment?",
                    "kind": "action",
                    "id": "condition-against-intended-use-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "care-and-intervention",
            "name": "Care and intervention",
            "description": "Selects maintenance, storage, and repair actions for the specimen's construction and custodial purpose.",
            "findings": [
              {
                "id": "appropriate-care-path",
                "name": "Appropriate care path",
                "description": "Record care requirements and proposed interventions together with their musical and cultural consequences.",
                "questions": [
                  {
                    "text": "What storage conditions, cleaning practices, and consumable replacements are supported for these particular materials and components?",
                    "kind": "action",
                    "id": "appropriate-care-path-q01"
                  },
                  {
                    "text": "Should intervention prioritise continued playing, preservation of existing material, customary treatment, or a documented combination?",
                    "kind": "action",
                    "id": "appropriate-care-path-q02"
                  },
                  {
                    "text": "Which repair or amplification changes require review because they could alter characteristic sound or culturally significant features?",
                    "kind": "boundary",
                    "id": "appropriate-care-path-q03"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "evidence-and-external-alignment",
        "name": "Evidence and external alignment",
        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
        "layers": [
          {
            "id": "reported-evidence",
            "name": "Reported evidence",
            "description": "Findings from the breadth pass, kept separate from the structural claims.",
            "findings": [
              {
                "id": "evidence-confidence-notes",
                "name": "Check these first",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "No recorded sense is supplied; this interpretation treats the entry as a culturally defined category of physical musical instruments.",
                  "Folk status should be checked against the terminology and practices of the relevant community.",
                  "Dimensions, pitch ranges, maintenance requirements and applicable regulations require a specific instrument type and jurisdiction."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-kinds",
                "name": "Kinds and varieties",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Folk string instruments",
                  "Folk wind instruments",
                  "Folk idiophones",
                  "Folk membranophones"
                ],
                "questions": [
                  {
                    "id": "evidence-kinds-q01",
                    "text": "Which of these kinds and varieties hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-identifiers",
                "name": "Identifiers and schemes",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "scheme": "Hornbostel-Sachs classification",
                    "value_or_pattern": "Hierarchical numerical code assigned according to sound-producing mechanism",
                    "note": "Classifies instrument types; it does not establish whether an instrument is folk."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-identifiers-q01",
                    "text": "Which of these identifiers and schemes hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-real-world-use",
                "name": "Real-world use",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Accompanying community dancing and singing",
                  "Providing music for ceremonies, festivals and seasonal observances",
                  "Supporting storytelling and oral traditions",
                  "Teaching and transmitting local musical practices",
                  "Performing in folk revivals, concerts and recordings"
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-failure-modes-and-hazards",
                "name": "Failure modes and hazards",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Wooden bodies can crack or warp with unsuitable humidity or temperature.",
                  "Strings and skin membranes can break, stretch or lose tension.",
                  "Reeds can split or deteriorate, affecting response and tuning.",
                  "Shared mouthpieces can present hygiene risks.",
                  "Loud playing can expose performers and listeners to potentially harmful sound levels."
                ],
                "questions": [
                  {
                    "id": "evidence-failure-modes-and-hazards-q01",
                    "text": "Which of these failure modes and hazards hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-regional-variation",
                "name": "Regional variation",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "The same instrument type may serve folk, religious, court or popular music in different communities.",
                  "Local traditions differ in construction materials, tuning, ornamentation and playing technique.",
                  "The labels folk, traditional and vernacular have overlapping meanings that vary across languages and scholarly traditions."
                ],
                "questions": [
                  {
                    "id": "evidence-regional-variation-q01",
                    "text": "Which of these regional variation hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-neighbours",
                "name": "Neighbouring kinds and how to tell them apart",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "name": "musical instrument",
                    "difference": "The broader category includes instruments regardless of their association with community traditions."
                  },
                  {
                    "name": "traditional musical instrument",
                    "difference": "Traditional instruments can belong to court, liturgical or classical traditions without ordinarily being described as folk."
                  },
                  {
                    "name": "folk music",
                    "difference": "Folk music is a musical practice or repertoire; a folk instrument is a physical means of producing music."
                  },
                  {
                    "name": "acoustic musical instrument",
                    "difference": "Acoustic describes sound production, whereas folk describes cultural association; the categories overlap but are not equivalent."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of folk instrument this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "What evidence threshold should establish folk attribution when community terminology, museum classification, and commercial labels disagree?",
    "Which existing Vercy musical-instrument model should supply inherited properties, and where should folk-specific extensions attach?",
    "How should the model represent local variants and shared names across communities without collapsing meaningful distinctions or creating unsupported splits?",
    "Which tuning descriptions and acoustic measurements best represent traditions whose pitch or timbre expectations are not captured by standard notation?",
    "How should conflicting practitioner and custodian preferences concerning playing, repair, amplification, and preservation be recorded and resolved for a specimen?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 17,
    "questions": 29
  }
}
