{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-07T09:19:49Z", "providers": [ "Codex" ], "missingProviders": [ "Grok" ], "pass": 2, "cost": { "grok": { "usd": null, "turns": null, "seconds": 14.1, "error": "Error: Internal error: {\n \"message\": \"API error (status 402 Payment Required): Grok Build usage balance exhausted\",\n \"http_status\": 402\n}", "retried": true }, "codex": { "seconds": 94.0, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\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: 01a07b29-4164-7e00-9c92-1813925208ac\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: cello\nRegistry id: vr.tr.cello\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\nA Vercy model" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:39:16+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "standards_and_regulation", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:33+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q8371", "registryId": "vr.tr.cello", "name": "cello", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.OBJ" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q8371/", "model": { "registry_id": "vr.tr.cello", "name": "cello", "purpose": "Enable an AI agent to recognise a cello, assess its playing readiness and preservation needs, and decide which playing, handling, setup or maintenance actions are appropriate.", "definition": "", "scope_statement": "This model owns an individual cello as a playable physical instrument, including its configuration, sounding system, structural condition, setup and instrument-specific constraints on use.", "in_scope": [ "Recognition of acoustic, electric and modified cello configurations", "Body, neck, fingerboard, strings, bridge and supporting components", "Tuning, string response and observed playing behaviour", "Structural condition, setup and readiness for a stated playing task", "Instrument-specific handling, storage and maintenance constraints" ], "out_of_scope": [ "The bow as a separately maintained object, including its hair and tensioning mechanism", "The player's technique, anatomy, proficiency and learning plan", "Compositions, notation, performances and repertoire requirements", "Cases, stands, amplifiers and other accessories as independent objects", "Ownership contracts, insurance policies, appraisals and sale transactions" ], "distinguishing_features": [ "Check the intended playing position: a cello is normally supported below the player with its neck extending upward and its body held between the legs, unlike a violin or viola held at the shoulder; record adaptations.", "Check nominal open-string pitches: the usual four-string cello configuration is C2-G2-D3-A3, which distinguishes it from standard violin, viola and double-bass tuning; alternative tuning requires additional identification evidence.", "Check string count, fret presence, body form and maker designation together when distinguishing a cello from a bass viol; no single feature is sufficient for every historical or modified instrument.", "Distinguish a fractional-size cello from another bowed instrument using intended tuning, playing position and model identification rather than body size alone.", "For a solid-body or skeletal electric instrument, check documented cello designation, intended tuning, string geometry and playing position rather than requiring an acoustic cello body." ], "characteristics": [ { "name": "Instrument configuration", "kind": "category", "unit_or_values": "acoustic, acoustic with pickup, electric, modified, unresolved", "why_it_matters": "Determines which body, acoustic and signal-path checks apply." }, { "name": "Nominal size designation", "kind": "category", "unit_or_values": "maker-stated full or fractional size; unknown", "why_it_matters": "Supports identification and fit assessment without treating a size label as an exact dimension." }, { "name": "Vibrating string length", "kind": "measurement", "unit_or_values": "mm, measured between nut and bridge contact points", "why_it_matters": "Informs string compatibility and playing geometry." }, { "name": "Installed string configuration", "kind": "relation", "unit_or_values": "ordered strings linked to intended pitch, product identity and observed condition", "why_it_matters": "Makes tuning and replacement decisions specific to the installed strings." }, { "name": "Observed tuning", "kind": "measurement", "unit_or_values": "pitch or frequency in Hz for each open string, with reference pitch and observation time", "why_it_matters": "Separates nominal tuning from the instrument's current state." }, { "name": "String clearance", "kind": "measurement", "unit_or_values": "mm for each string at a stated fingerboard location", "why_it_matters": "Helps assess playability and investigate buzzing or excessive stopping effort." }, { "name": "Bridge condition and position", "kind": "state", "unit_or_values": "observed alignment, foot contact, deformation and movement; unassessed", "why_it_matters": "Affects string geometry and whether tuning or playing should continue." }, { "name": "Body and neck integrity", "kind": "state", "unit_or_values": "location-specific observations of cracks, seam openings, deformation or looseness; unassessed", "why_it_matters": "Identifies conditions requiring restricted use or specialist assessment." }, { "name": "Support configuration", "kind": "category", "unit_or_values": "adjustable endpin, fixed support, no endpin, adapted support, unresolved", "why_it_matters": "Determines how the cello can be positioned securely for playing." }, { "name": "Playing response", "kind": "state", "unit_or_values": "string- and register-specific observations of response, sustain, buzz, rattle or unstable resonance under stated test conditions", "why_it_matters": "Connects reported sound problems to reproducible observations." }, { "name": "Use readiness", "kind": "state", "unit_or_values": "ready for stated task, usable with restrictions, assessment required, do not play, unknown", "why_it_matters": "Turns condition evidence into a bounded action decision." } ], "affordances": [ "Identify the cello's configuration and determine which assessment steps apply.", "Assess suitability for a stated playing task using size, setup, support and response observations.", "Tune compatible installed strings to an established target when condition permits.", "Position and support the instrument using its verified endpin or adapted support.", "Document sound or structural symptoms and refer appropriate work to a qualified repairer.", "Prepare the cello for storage or transport using its condition and support constraints." ], "agent_conduct": { "may": [ "Record the cello's maker attribution, condition, setup and repair history for its keeper.", "Monitor the humidity and temperature where the cello is stored and alert its keeper.", "Help a player tune it or check its setup when the player asks." ], "must_not": [ "Attribute a cello to a famous maker without documentary or expert evidence.", "Move, ship or handle a valuable cello without a hard case and the keeper's instruction.", "Adjust the bridge, soundpost or neck in a way only a qualified luthier should.", "Help export a cello or bow containing protected materials without the required permits." ], "requires_human": [ "Selling, lending or insuring a cello, or certifying its value.", "Irreversible repairs or restoration of an old instrument." ] }, "ethics": { "considerations": [ "Fine cellos are cultural heritage; careless handling or false attribution destroys value and history.", "Bows and fittings may contain protected species, which ties the trade to conservation law." ], "affected_parties": [ "The player or owner", "Future players and heirs", "Buyers relying on attributions" ] }, "owners": { "steward": "The person who owns or is lent the cello; a luthier answers for work done on it.", "master_systems": [] }, "visual_identification": [ "A large bowed string instrument played upright between the knees, resting on an endpin.", "Four strings over a high arched bridge, with f-shaped sound holes either side.", "A scroll at the top of the neck and a body roughly the size of a seated child." ], "failure_modes_and_hazards": [ "Cracks, open seams or a fallen soundpost from dry air, heat or knocks.", "A bridge or endpin giving way under string tension can damage the top.", "Seizure at borders when bows contain undeclared protected materials." ], "standards_and_regulation": [ "Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which covers bows and fittings made from listed species such as pernambuco or ivory." ], "what_it_is_for": [ "A cello is used in orchestras, chamber ensembles, solo performances and music education.", "Players usually perform seated with the instrument supported between the knees and by an endpin, producing sound by bowing or plucking its strings.", "Its range supports bass lines, inner parts and prominent melodies." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q8371: cello", "url": "https://www.wikidata.org/wiki/Q8371", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Cello", "url": "https://en.wikipedia.org/wiki/Cello", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "cello-identity-and-configuration", "name": "Cello identity and configuration", "description": "Establishes why this instrument is treated as a cello and which physical variant is present.", "rationale": "Electric bodies, fractional sizes and modified string configurations make silhouette alone an unreliable basis for recognition.", "layers": [ { "id": "instrument-family-evidence", "name": "Instrument family evidence", "description": "Records evidence separating a cello from neighbouring bowed-string instruments.", "findings": [ { "id": "cello-identification-basis", "name": "Cello identification basis", "description": "Record intended tuning, playing position, construction cues and documented designation, including conflicting evidence.", "questions": [ { "text": "Which observed features and documented designation establish that this instrument is a cello?", "kind": "definition", "id": "cello-identification-basis-q01" }, { "text": "Could this instead be a viola, double bass or bass viol, and what evidence resolves that boundary?", "kind": "boundary", "id": "cello-identification-basis-q02" } ] } ] }, { "id": "variant-and-attribution", "name": "Variant and attribution", "description": "Separates physical configuration from claims about maker, age and model.", "findings": [ { "id": "documented-and-observed-configuration", "name": "Documented and observed configuration", "description": "Record acoustic or electric construction, size designation and modifications while distinguishing labels from verified attribution.", "questions": [ { "text": "What size, body type and string configuration are observed, and do they agree with the stated model?", "kind": "definition", "id": "documented-and-observed-configuration-q01" }, { "text": "What evidence supports the maker, date and modification history beyond any internal label?", "kind": "provenance", "id": "documented-and-observed-configuration-q02" } ] } ] } ] }, { "id": "strings-and-playing-geometry", "name": "Strings and playing geometry", "description": "Describes the installed strings and the geometry through which the player stops and bows them.", "rationale": "A cello may be recognisable and intact yet unsuitable to play because its strings or setup do not fit the intended use.", "layers": [ { "id": "stringing-and-tuning", "name": "Stringing and tuning", "description": "Records string identity, tuning targets and tuning-system behaviour.", "findings": [ { "id": "installed-strings-and-pitch-state", "name": "Installed strings and pitch state", "description": "Distinguish intended open-string pitches from measured pitches and establish whether the strings and tuning hardware support the target.", "questions": [ { "text": "Which strings are installed, what pitches are intended, and what pitches are currently measured?", "kind": "measurement", "id": "installed-strings-and-pitch-state-q01" }, { "text": "Do string condition, compatibility, peg behaviour or fine-tuner travel constrain tuning to those targets?", "kind": "action", "id": "installed-strings-and-pitch-state-q02" } ] } ] }, { "id": "fingerboard-and-bridge-geometry", "name": "Fingerboard and bridge geometry", "description": "Captures the measurable setup affecting stopping effort and access to individual strings.", "findings": [ { "id": "usable-string-path", "name": "Usable string path", "description": "Record vibrating length, string spacing, clearances and bridge or fingerboard irregularities without assuming one universal acceptable setup.", "questions": [ { "text": "What are the vibrating string length, string spacing and clearances at explicitly identified measurement points?", "kind": "measurement", "id": "usable-string-path-q01" }, { "text": "Which observed geometry limits clean stopping or bowing, and does correction require a cello setup specialist?", "kind": "action", "id": "usable-string-path-q02" } ] } ] } ] }, { "id": "structure-and-tension-bearing-condition", "name": "Structure and tension-bearing condition", "description": "Assesses components that maintain the cello's shape and carry string forces.", "rationale": "Cracks, unstable joints or displaced supporting parts can change whether continued tuning, playing or transport is appropriate.", "layers": [ { "id": "body-and-neck-integrity", "name": "Body and neck integrity", "description": "Records condition evidence in the body, seams, neck and fingerboard attachment.", "findings": [ { "id": "structural-symptoms-and-change", "name": "Structural symptoms and change", "description": "Locate visible damage and movement, distinguish observations from diagnoses, and record whether symptoms are changing.", "questions": [ { "text": "Where are cracks, open seams, deformation or loose attachments observed, and how have they changed since the last assessment?", "kind": "measurement", "id": "structural-symptoms-and-change-q01" }, { "text": "Which observations require stopping use or obtaining specialist assessment before further tuning?", "kind": "action", "id": "structural-symptoms-and-change-q02" } ] } ] }, { "id": "bridge-and-internal-support", "name": "Bridge and internal support", "description": "Assesses bridge seating, tailpiece attachment and applicable internal acoustic supports.", "findings": [ { "id": "support-condition-and-inspection-limits", "name": "Support condition and inspection limits", "description": "Record bridge and tailgut observations and, for applicable construction, evidence about the soundpost and bass bar without treating inaccessible parts as inspected.", "questions": [ { "text": "What can actually be established about bridge seating, tailgut condition and internal supports, and which parts remain uninspected?", "kind": "boundary", "id": "support-condition-and-inspection-limits-q01" }, { "text": "Does the evidence permit continued use, or require a repairer to assess the tension-bearing system?", "kind": "action", "id": "support-condition-and-inspection-limits-q02" } ] } ] } ] }, { "id": "sound-production-and-response", "name": "Sound production and response", "description": "Records how this cello responds during playing and, where applicable, through its electrical output.", "rationale": "Readiness depends on reproducible musical response as well as visible condition, and symptoms may arise outside the instrument.", "layers": [ { "id": "acoustic-playing-response", "name": "Acoustic playing response", "description": "Captures string- and register-specific sound observations under stated playing conditions.", "findings": [ { "id": "repeatable-response-symptoms", "name": "Repeatable response symptoms", "description": "Record response, sustain, buzzes, rattles and suspected wolf-note behaviour with enough context to repeat the observation.", "questions": [ { "text": "On which strings and pitches, at what dynamics and with which bowing or plucking conditions, does the symptom recur?", "kind": "measurement", "id": "repeatable-response-symptoms-q01" }, { "text": "What comparison distinguishes an instrument symptom from bow, player, room or accessory effects?", "kind": "boundary", "id": "repeatable-response-symptoms-q02" } ] } ] }, { "id": "pickup-and-output-path", "name": "Pickup and output path", "description": "Records installed sound capture and output components when present.", "findings": [ { "id": "electrical-output-readiness", "name": "Electrical output readiness", "description": "Identify pickup, onboard controls, power requirements and output behaviour; mark this layer inapplicable when absent.", "questions": [ { "text": "Which pickup and onboard electronics are installed, and what documented power and connection requirements apply?", "kind": "provenance", "id": "electrical-output-readiness-q01" }, { "text": "What test isolates an onboard output fault from the cable, amplifier or other external equipment?", "kind": "action", "id": "electrical-output-readiness-q02" } ] } ] } ] }, { "id": "playing-support-and-care-decisions", "name": "Playing support and care decisions", "description": "Connects cello-specific support, handling and care evidence to permitted actions.", "rationale": "An otherwise playable cello still needs secure positioning and condition-appropriate care to be usable for a particular task.", "layers": [ { "id": "support-and-task-fit", "name": "Support and task fit", "description": "Assesses endpin or adapted support security and compatibility with the intended playing arrangement.", "findings": [ { "id": "secure-playing-position", "name": "Secure playing position", "description": "Record support extension, locking behaviour, floor contact and instrument dimensions relevant to the proposed arrangement.", "questions": [ { "text": "Does the endpin or alternative support hold its intended position without slipping under the proposed playing conditions?", "kind": "measurement", "id": "secure-playing-position-q01" }, { "text": "What support or positioning adjustment is needed before this cello can be used for the stated task?", "kind": "action", "id": "secure-playing-position-q02" } ] } ] }, { "id": "care-history-and-use-restrictions", "name": "Care history and use restrictions", "description": "Connects repairs, environmental exposure and current symptoms to care and use decisions.", "findings": [ { "id": "condition-based-care-plan", "name": "Condition-based care plan", "description": "Record relevant repair history, recent exposure, finish-sensitive care instructions and explicit limits on playing, tuning or handling.", "questions": [ { "text": "Which repair records, maker instructions or recent temperature and humidity exposures affect the care decision for this cello?", "kind": "provenance", "id": "condition-based-care-plan-q01" }, { "text": "Which playing, cleaning, string-changing, storage or transport actions are appropriate now, and which require specialist guidance?", "kind": "action", "id": "condition-based-care-plan-q02" } ] } ] } ] } ] }, "openQuestions": [ "What registry boundary should apply to historical, extended-range and hybrid instruments described as cellos when their tuning or construction differs substantially?", "Which measurement conventions and acceptable setup ranges should be adopted for different cello sizes, string types and playing requirements?", "Which observable structural symptoms justify immediate suspension of playing or tuning, and which require specialist assessment before assigning urgency?", "What repeatable assessment protocol can separate cello response problems from player, bow, room and amplification effects?", "Which maker- or repairer-supported environmental and care limits apply to different materials, finishes, repairs and electric cello constructions?" ], "statistics": { "bundles": 5, "layers": 10, "findings": 10, "questions": 20 } }