{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T10:12:34Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 15.8, "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: 01a09519-df13-76c2-bf21-22a02931587a\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: head stand\nSense to describe: (none recorded)\nDomain code: ACT.ACT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001 regi", "usd": 0.0, "recall": true }, "codex": { "seconds": 59.7, "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: 01a09519-df1e-7162-bc3b-8a99af9c621b\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: head stand\nRegistry id: vr.tr.head-stand\nPlane / domain: ACT / ACT.ACT\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nCo" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:48:58+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:31+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q500622", "registryId": "vr.tr.head-stand", "name": "head stand", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "ACT.ACT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q500622/", "model": { "registry_id": "vr.tr.head-stand", "name": "head stand", "purpose": "Enable an agent to recognise a head stand, describe its support and execution, and determine which assessment or supervision context applies.", "definition": "A headstand is an inverted balance in which the crown of the head contacts a supporting surface and, usually together with the hands or forearms, supports the body with the trunk and legs above the head.", "scope_statement": "This model owns head stand as an embodied balancing activity with the body inverted and the head forming part of the support, while leaving discipline-specific technique and eligibility requirements to linked models.", "in_scope": [ "Recognition of head-supported inverted balances", "Head, hand and forearm contact configurations", "Body configuration and balance during an attempt", "Entry, holding and exit phases", "External assistance, apparatus and execution setting", "Observed outcomes and applicable assessment criteria" ], "out_of_scope": [ "Handstands and forearm stands without head support", "Shoulder stands in which the head is not a supporting base", "Head spins and other rotational skills as independent activities", "Complete yoga, gymnastics or acrobatics training programmes", "Medical diagnosis, individual clearance and injury treatment", "Stands or fixtures used to hold manufactured or anatomical heads" ], "distinguishing_features": [ "The pelvis is elevated above the head in the defining inverted phase; merely bending down and touching the head to the floor does not establish a head stand.", "The head forms part of the supporting base; incidental head contact during a handstand requires separate classification.", "Record whether hands, forearms, apparatus or another person share support, rather than treating every head stand as head-only support.", "A shoulder-supported inversion is distinguished by its supporting contact configuration, even if the head also touches the surface.", "A head-supported balance may occur within a sequence, but a head spin or transient passage through inversion is not automatically a held head stand." ], "characteristics": [ { "name": "Practice context", "kind": "category", "unit_or_values": "yoga | gymnastics | acrobatics | dance | other | unknown", "why_it_matters": "Terminology, recognised variants and assessment criteria depend on the practice." }, { "name": "Supporting contacts", "kind": "category", "unit_or_values": "Recorded combination of head, hands, forearms, apparatus and human support", "why_it_matters": "Distinguishes head-supported inversion from neighbouring balances and identifies the support configuration." }, { "name": "Head contact region", "kind": "category", "unit_or_values": "Observed or reported anatomical contact region | unclear | unobserved", "why_it_matters": "The activity name alone does not establish where the head contacts the surface." }, { "name": "Body configuration", "kind": "state", "unit_or_values": "Description of pelvis position, trunk orientation and leg arrangement", "why_it_matters": "Separates inverted holding configurations from preparatory and transitional positions." }, { "name": "Execution phase", "kind": "state", "unit_or_values": "preparation | entry | inverted hold | exit | interrupted attempt | completed attempt", "why_it_matters": "A setup position or attempted entry should not be recorded as an achieved hold." }, { "name": "Hold duration", "kind": "measurement", "unit_or_values": "seconds, with explicitly defined start and end events", "why_it_matters": "Makes duration comparable without inventing a universal minimum hold time." }, { "name": "External assistance", "kind": "relation", "unit_or_values": "Links to wall, apparatus or assisting person, with contact and assistance role", "why_it_matters": "Distinguishes independent balance from configurations maintained partly by external support." }, { "name": "Support-load evidence", "kind": "category", "unit_or_values": "instrumented measurement | participant report | observer inference | unknown", "why_it_matters": "Visible contact alone does not establish how much load the head or upper limbs bear." }, { "name": "Attempt outcome", "kind": "state", "unit_or_values": "hold observed | entry not achieved | interrupted | balance lost | indeterminate, with exit recorded separately", "why_it_matters": "Preserves what occurred without equating a held position with satisfactory execution." } ], "affordances": [ "Classify a recorded attempt as a head stand, a neighbouring inversion or an unresolved case.", "Compare attempts by support configuration, assistance, body position and hold duration.", "Annotate entry, holding, balance loss and exit events in an observation or video.", "Link an attempt to the terminology and assessment criteria of its practice context.", "Identify missing observations before judging completion or execution quality.", "Route requests for technique instruction or individual suitability to an appropriately qualified source." ], "agent_conduct": { "may": [ "Describe the headstand, its variations and general safety guidance from reliable sources.", "Suggest qualified instruction for people who want to learn it." ], "must_not": [ "Encourage people with neck, eye, blood pressure or other relevant conditions to attempt it without medical advice.", "Encourage beginners to practise it unsupervised on hard surfaces or near obstacles.", "Present it as a cure for medical conditions." ], "requires_human": [ "Advising a person with a known health condition on whether to practise inversions." ] }, "ethics": { "considerations": [ "Inversions put load on the neck and can injure people who try them unprepared.", "Health claims about poses can mislead people away from medical care." ], "affected_parties": [ "Beginners", "People with neck or eye conditions", "Children" ] }, "owners": { "steward": "Nobody owns the posture; instructors answer for the classes they teach.", "master_systems": [] }, "what_it_is_for": [ "The pose occurs in gymnastics, yoga and other balance practices as an inverted body position.", "Coaching and movement assessment use it to examine balance, body alignment and the distribution of support." ], "visual_identification": [ "The crown of the head contacts the supporting surface with the trunk positioned above it.", "The hands or forearms usually provide additional contact beside the head.", "The legs are raised above the trunk or held in a bent variation while the body remains inverted." ], "failure_modes_and_hazards": [ "Loading through the head can place harmful stress on the neck.", "Loss of balance can cause falls and injuries to the participant or nearby people.", "Inversion may aggravate some existing health conditions and require individual assessment.", "An unstable or obstructed practice space increases collision and fall risks." ], "facets_not_applicable": { "interfaces": "No universal standard or regulation applies to the pose itself independently of its sporting, instructional or clinical context." } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q500622: head stand", "url": "https://www.wikidata.org/wiki/Q500622", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Headstand", "url": "https://en.wikipedia.org/wiki/Headstand", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "head-stand-identity", "name": "Head stand identity", "description": "Defines the activity through inversion and head support while retaining uncertainty about registry intent.", "rationale": "The registry supplies no definition, and the label must be separated from neighbouring balances and equipment meanings.", "layers": [ { "id": "inversion-and-support", "name": "Inversion and support", "description": "Establishes the physical features required to recognise an instance.", "findings": [ { "id": "head-supported-inversion", "name": "Head-supported inversion", "description": "Record evidence that the body reaches an inverted configuration and that the head participates in support.", "questions": [ { "text": "What evidence establishes that the pelvis is above the head during the candidate head stand?", "kind": "definition", "id": "head-supported-inversion-q01" }, { "text": "Does the head participate in support, or does it merely touch the surface?", "kind": "boundary", "id": "head-supported-inversion-q02" } ] } ] }, { "id": "practice-specific-naming", "name": "Practice-specific naming", "description": "Connects the registry label to terms used in the originating practice.", "findings": [ { "id": "variant-name-mapping", "name": "Variant name mapping", "description": "Preserve the source's variant name without assuming that yoga, gymnastics and dance terms are interchangeable.", "questions": [ { "text": "Which practice or source supplies the name used for this head stand?", "kind": "provenance", "id": "variant-name-mapping-q01" }, { "text": "Does that source include assisted, tucked or transitional forms within the same named activity?", "kind": "boundary", "id": "variant-name-mapping-q02" } ] } ] } ] }, { "id": "support-and-body-configuration", "name": "Support and body configuration", "description": "Describes the supporting base and the arrangement of the inverted body.", "rationale": "Head stands with different contact patterns or body configurations should not collapse into one undifferentiated pose.", "layers": [ { "id": "contact-and-load", "name": "Contact and load", "description": "Separates observable contacts from claims about load distribution.", "findings": [ { "id": "support-base-record", "name": "Support base record", "description": "Record head, hand and forearm contacts, their relative positions, and the evidence available about their supporting roles.", "questions": [ { "text": "Which parts of the head and upper limbs contact the supporting surface, and where are they relative to one another?", "kind": "measurement", "id": "support-base-record-q01" }, { "text": "Is load sharing measured, reported or inferred solely from visible contact?", "kind": "provenance", "id": "support-base-record-q02" } ] } ] }, { "id": "inverted-body-arrangement", "name": "Inverted body arrangement", "description": "Captures trunk, pelvis and limb positions during the balance.", "findings": [ { "id": "configuration-through-time", "name": "Configuration through time", "description": "Describe the held configuration and changes within it without assuming that straight legs define every variant.", "questions": [ { "text": "What trunk, pelvis and leg configuration is observed during the inverted phase?", "kind": "measurement", "id": "configuration-through-time-q01" }, { "text": "Which configuration changes belong to the declared variant, and which indicate departure from its assessment criteria?", "kind": "boundary", "id": "configuration-through-time-q02" } ] } ] } ] }, { "id": "attempt-and-balance", "name": "Attempt and balance", "description": "Represents a head stand as an attempt unfolding through entry, holding and exit.", "rationale": "A still image cannot establish how the position was reached, whether it was maintained or how the attempt ended.", "layers": [ { "id": "phase-boundaries", "name": "Phase boundaries", "description": "Separates preparation and transitions from the defining inverted phase.", "findings": [ { "id": "hold-interval", "name": "Hold interval", "description": "Record explicit timing boundaries and distinguish an achieved hold from passage through the position.", "questions": [ { "text": "Which observable events mark the start and end of the head stand hold?", "kind": "measurement", "id": "hold-interval-q01" }, { "text": "Does the applicable practice require a minimum duration to count the attempt, and what source establishes it?", "kind": "definition", "id": "hold-interval-q02" } ] } ] }, { "id": "balance-and-exit", "name": "Balance and exit", "description": "Captures maintenance of the inverted position and termination of the attempt.", "findings": [ { "id": "balance-events-and-termination", "name": "Balance events and termination", "description": "Record repositioning, new support contacts, assistance and exit events separately from overall success labels.", "questions": [ { "text": "What repositioning, support changes or assistance occur while the head stand is held?", "kind": "measurement", "id": "balance-events-and-termination-q01" }, { "text": "Does the attempt end through an intended exit, external intervention, loss of balance or an unobserved transition?", "kind": "measurement", "id": "balance-events-and-termination-q02" } ] } ] } ] }, { "id": "execution-context-and-assessment", "name": "Execution context and assessment", "description": "Links the observed attempt to its setting, assistance and applicable decision criteria.", "rationale": "Independent execution, assisted practice and formal assessment require different interpretations of the same visible inversion.", "layers": [ { "id": "surface-and-assistance", "name": "Surface and assistance", "description": "Records environmental supports that affect interpretation of the attempt.", "findings": [ { "id": "external-support-role", "name": "External support role", "description": "Distinguish support actually used from nearby equipment or a person available to assist.", "questions": [ { "text": "What surface, wall, apparatus or person is involved, and during which phases is contact made?", "kind": "measurement", "id": "external-support-role-q01" }, { "text": "Does external support maintain the inversion, assist a transition or remain available without contact?", "kind": "boundary", "id": "external-support-role-q02" } ] } ] }, { "id": "criteria-and-next-actions", "name": "Criteria and next actions", "description": "Constrains judgments and recommendations to explicit criteria and available evidence.", "findings": [ { "id": "assessment-authority", "name": "Assessment authority", "description": "Link completion and quality judgments to an identified practice standard; do not infer individual suitability from successful inversion.", "questions": [ { "text": "Which named source or assessor defines completion and execution quality for this head stand variant?", "kind": "provenance", "id": "assessment-authority-q01" }, { "text": "What missing evidence or qualified review is required before an agent can recommend progression or further attempts?", "kind": "action", "id": "assessment-authority-q02" } ] } ] } ] }, { "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": [ "The label and ACT.ACT domain suggest the physical activity, but the registry provides no recorded sense to confirm this.", "Variant names are descriptive and are not a universal taxonomy across yoga, gymnastics and dance.", "No specific identifier, governing standard or normative performance range is confidently recalled." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of head stand 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": [ "Forearm-supported headstand", "Tripod headstand", "Unsupported headstand", "Wall-assisted headstand" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of head stand 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": [ "Yoga posture practice", "Gymnastics balance training", "Acrobatic and circus performance", "Dance and breaking" ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of head stand this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "quantity": "Duration of maintained balance", "typical_range": "No universal range; depends on the practice and assessment", "unit": "s" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of head stand 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": [ "Loss of balance and falls", "Excessive loading or misalignment of the neck", "Head impact during an uncontrolled entry or exit", "Strain of the supporting wrists, arms or shoulders" ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of head stand 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": [ "Yoga traditions commonly use the Sanskrit name Sirsasana or Shirshasana; naming and classification of supported variants differ between teaching lineages." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of head stand 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": "Handstand", "difference": "The hands support the body while the head remains clear of the supporting surface." }, { "name": "Forearm stand", "difference": "The forearms support the inverted body while the head remains clear of the supporting surface." }, { "name": "Shoulder stand", "difference": "The main support is through the shoulders and upper arms rather than the crown of the head." }, { "name": "Headspin", "difference": "Rotation around the head contact is central to the movement, whereas a headstand is principally a balance." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of head stand this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does the registry intend head stand as a general physical activity, a particular yoga posture or a specific gymnastics skill?", "Which authoritative practice sources define the boundary between a held head stand and a transitional head-supported inversion?", "How do relevant practices classify hand-supported, forearm-supported, assisted and head-only variants?", "Which observable criteria support reliable judgments of balance and controlled exit across those variants?", "Which qualified sources should govern technique, supervision and individual suitability decisions for each execution context?" ], "statistics": { "bundles": 5, "layers": 9, "findings": 15, "questions": 23 } }