{
    "model": {
        "rank": 2892,
        "code": "thing-q161071",
        "model_id": "vr.tr.screwdriver",
        "name": "screwdriver",
        "purpose": "Enable an AI agent to recognise a screwdriver, assess its fitness for a particular screw and task, and decide how it may be used, maintained or withdrawn from use.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.OBJ",
        "industry": "",
        "version": "",
        "url": "/models/thing/q161071/",
        "tier": 2,
        "score": 95,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "DeWalt DW268",
                "DeWalt DW257",
                "DeWalt DW272",
                "Hitachi W6V3",
                "screwdriver bit",
                "torque screwdriver",
                "Yankee screwdriver",
                "Tester screwdriver"
            ],
            "aliasCount": 8,
            "merged": 8,
            "knownIn": 95,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": "vr.tr.screwdriver",
            "source": {
                "dataset": "wikidata",
                "item": "Q161071",
                "url": "https://www.wikidata.org/wiki/Q161071",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T13:32:44Z",
                "providers": [
                    "Codex",
                    "Grok"
                ],
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "usd": 0.00799238,
                        "turns": 1,
                        "seconds": 129.1,
                        "error": null
                    },
                    "codex": {
                        "seconds": 81.8,
                        "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: 01a07c0d-fb0f-7403-9a8f-7b93367c4007\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: screwdriver\nRegistry id: vr.tr.screwdriver\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\nA"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q161071",
                "registryId": "vr.tr.screwdriver",
                "name": "screwdriver",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.OBJ"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q161071/",
            "model": {
                "registry_id": "vr.tr.screwdriver",
                "name": "screwdriver",
                "purpose": "Enable an AI agent to recognise a screwdriver, assess its fitness for a particular screw and task, and decide how it may be used, maintained or withdrawn from use.",
                "definition": "A screwdriver is a torque-transmitting hand tool or interchangeable bit whose formed tip is sized and profiled to mate with a matching slot or recess in a screw head so the fastener can be driven or extracted by rotation rather than by gripping the screw body.",
                "scope_statement": "This model owns the identity, configuration, screw engagement, manual torque transmission, condition and task suitability of a hand-operated screwdriver, including fixed-tip, interchangeable-bit and ratcheting forms.",
                "in_scope": [
                    "The assembled screwdriver and its currently fitted tip or bit",
                    "Drive profile, tip size and access geometry",
                    "Handle, shaft and manual torque-transmission mechanisms",
                    "Wear, damage, bit retention and functional condition",
                    "Task-specific suitability and documented use restrictions"
                ],
                "out_of_scope": [
                    "Screw identity, thread geometry and fastener condition beyond their interface with the screwdriver",
                    "Joint design, tightening requirements and assembly acceptance criteria",
                    "Motor-powered screwdrivers and drill-drivers",
                    "Loose-bit inventories and bit manufacturing specifications",
                    "Electrical installation state and workplace hazard assessment"
                ],
                "distinguishing_features": [
                    "Its working end engages a screw-head drive feature to transmit rotation, rather than gripping the outside of a nut or bolt.",
                    "The assembled tool provides a hand-operated path from a handle to a screw-engaging tip; a loose bit alone lacks that assembly.",
                    "Its intended driving action is rotation through the tip, distinguishing it from an awl, punch or chisel despite possible similarities in outline.",
                    "The operator supplies the driving torque manually, distinguishing the scoped tool from a motor-powered screwdriver.",
                    "For a disputed hex or socket form, identification requires checking the tool's declared type and registry boundary rather than relying only on its ability to turn a screw."
                ],
                "characteristics": [
                    {
                        "name": "Tool configuration",
                        "kind": "category",
                        "unit_or_values": "fixed-tip | interchangeable-bit | other documented configuration | unknown",
                        "why_it_matters": "Determines which components establish the tool's current identity and usability."
                    },
                    {
                        "name": "Drive profile",
                        "kind": "category",
                        "unit_or_values": "Recorded profile designation, such as slotted, Phillips, Pozidriv, Torx or hex; unknown permitted",
                        "why_it_matters": "Visually similar tips may engage different screw-head profiles."
                    },
                    {
                        "name": "Tip size designation",
                        "kind": "category",
                        "unit_or_values": "Profile-specific size marking or designation, with its designation system",
                        "why_it_matters": "A size is meaningful only together with its drive profile and sizing convention."
                    },
                    {
                        "name": "Working-end dimensions",
                        "kind": "measurement",
                        "unit_or_values": "mm, with the measured feature identified",
                        "why_it_matters": "Supports fit assessment when markings are missing or physical clearance must be checked."
                    },
                    {
                        "name": "Reach and access envelope",
                        "kind": "measurement",
                        "unit_or_values": "mm for usable reach, shaft diameter and handle clearance dimensions",
                        "why_it_matters": "A matching tip may still be unable to reach or rotate at a recessed screw."
                    },
                    {
                        "name": "Installed bit",
                        "kind": "relation",
                        "unit_or_values": "Reference to fitted bit, integral tip, no bit fitted or unknown",
                        "why_it_matters": "Changing the bit changes the assembled tool's screw compatibility."
                    },
                    {
                        "name": "Torque-transmission mode",
                        "kind": "state",
                        "unit_or_values": "direct | ratchet clockwise | ratchet counterclockwise | ratchet locked | other | unknown",
                        "why_it_matters": "Determines how handle movement reaches the screw."
                    },
                    {
                        "name": "Torque-control setting",
                        "kind": "measurement",
                        "unit_or_values": "N·m with documented range and verification status; not applicable or unknown",
                        "why_it_matters": "A torque-controlled task requires more than an unverified setting or an ordinary handle."
                    },
                    {
                        "name": "Working-end condition",
                        "kind": "state",
                        "unit_or_values": "Observed wear, rounding, chipping, bending or contamination, with assessment date",
                        "why_it_matters": "Tip condition affects engagement and the risk of slipping or damaging the screw."
                    },
                    {
                        "name": "Structural and retention condition",
                        "kind": "state",
                        "unit_or_values": "Observed handle, shaft, connection and bit-retention condition; unassessed permitted",
                        "why_it_matters": "A compatible tip is insufficient if torque cannot be transmitted securely."
                    },
                    {
                        "name": "Documented special-use rating",
                        "kind": "relation",
                        "unit_or_values": "Reference to applicable manufacturer instructions, markings or certification evidence; none recorded",
                        "why_it_matters": "Claims such as electrical insulation or impact suitability must be tied to the particular tool."
                    }
                ],
                "affordances": [
                    "Match the fitted tip to a target screw's drive profile, size and access constraints.",
                    "Turn a compatible screw manually within the tool's documented limits.",
                    "Change and secure a compatible bit on an interchangeable-bit screwdriver.",
                    "Select an available ratchet direction or torque-control setting.",
                    "Inspect, clean and reassess the tip, handle, shaft and retention mechanism.",
                    "Withdraw the screwdriver from a task when damage, mismatch or missing evidence prevents a suitability judgment."
                ]
            },
            "sources": [
                {
                    "id": "iso-2380",
                    "title": "ISO 2380, Assembly tools for screws and nuts - Screwdrivers for slotted-head screws",
                    "url": "",
                    "what_it_supports": "Defines the slotted-tip geometry, sizes, and the distinction between tips for hand- and machine-operated screwdrivers."
                },
                {
                    "id": "iso-8764",
                    "title": "ISO 8764, Assembly tools for screws and nuts - Screwdrivers for cross-recessed head screws",
                    "url": "",
                    "what_it_supports": "Defines Phillips and Pozidriv driver tips, blade lengths, and marking of hand-operated cross-recess screwdrivers."
                },
                {
                    "id": "iec-60900",
                    "title": "IEC 60900, Live working - Hand tools for use up to 1 000 V AC and 1 500 V DC",
                    "url": "",
                    "what_it_supports": "Governs insulated screwdriver construction, marking, and dielectric testing used for electricians' tools."
                },
                {
                    "id": "wikipedia-screwdriver",
                    "title": "Screwdriver",
                    "url": "https://en.wikipedia.org/wiki/Screwdriver",
                    "what_it_supports": "Overview of tip families in actual use (slotted, Phillips, Pozidriv, Robertson, Torx, hex), regional habits, and the cam-out behaviour that separates Phillips from Pozidriv and JIS.",
                    "url_status": "live"
                }
            ],
            "structure": {
                "bundles": [
                    {
                        "id": "screwdriver-identity",
                        "name": "Screwdriver identity",
                        "description": "Establish what screwdriver is present and which assembly is being assessed.",
                        "rationale": "Appearance alone may not distinguish a complete screwdriver from a bit, another pointed tool or a neighbouring driver type.",
                        "layers": [
                            {
                                "id": "tool-boundary",
                                "name": "Tool boundary",
                                "description": "Identify the intended driving function and the limits of this model.",
                                "findings": [
                                    {
                                        "id": "manual-screw-driving",
                                        "name": "Manual screw-driving identity",
                                        "description": "Record evidence that the object is an assembled tool intended to turn screws through a manually driven tip.",
                                        "questions": [
                                            {
                                                "text": "What observed features or product identification establish this as a hand-operated screwdriver?",
                                                "kind": "definition",
                                                "id": "manual-screw-driving-q01"
                                            },
                                            {
                                                "text": "Does this instance require a boundary decision with a hex key, nut driver, powered driver or loose bit?",
                                                "kind": "boundary",
                                                "id": "manual-screw-driving-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "assembled-configuration",
                                "name": "Assembled configuration",
                                "description": "Identify the parts that determine the screwdriver's current capability.",
                                "findings": [
                                    {
                                        "id": "current-driving-assembly",
                                        "name": "Current driving assembly",
                                        "description": "Record whether the tip is integral or replaceable and identify fitted bits, holders and extensions.",
                                        "questions": [
                                            {
                                                "text": "Which tip, bit, holder and extension currently form the torque path?",
                                                "kind": "definition",
                                                "id": "current-driving-assembly-q01"
                                            },
                                            {
                                                "text": "Which markings or records identify the handle assembly and fitted components?",
                                                "kind": "provenance",
                                                "id": "current-driving-assembly-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "screw-engagement",
                        "name": "Screw engagement",
                        "description": "Represent whether the working end matches and seats in a particular screw.",
                        "rationale": "A screwdriver must match the screw interface closely enough to transmit torque without relying on superficial resemblance.",
                        "layers": [
                            {
                                "id": "profile-and-size",
                                "name": "Profile and size",
                                "description": "Describe the tip using its own profile and sizing convention.",
                                "findings": [
                                    {
                                        "id": "tip-identification",
                                        "name": "Tip identification",
                                        "description": "Record the drive profile and size, separating observed geometry from markings and inferred identifications.",
                                        "questions": [
                                            {
                                                "text": "What drive profile and size are marked or otherwise established for this tip?",
                                                "kind": "definition",
                                                "id": "tip-identification-q01"
                                            },
                                            {
                                                "text": "Which working-end dimensions must be measured if the designation is absent or ambiguous?",
                                                "kind": "measurement",
                                                "id": "tip-identification-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "seating-and-access",
                                "name": "Seating and access",
                                "description": "Assess engagement in the target screw and clearance around it.",
                                "findings": [
                                    {
                                        "id": "target-screw-fit",
                                        "name": "Target screw fit",
                                        "description": "Record seating, interference and available alignment for the proposed screw-driving task.",
                                        "questions": [
                                            {
                                                "text": "Does the tip seat in the target drive feature without obstruction or evident profile mismatch?",
                                                "kind": "measurement",
                                                "id": "target-screw-fit-q01"
                                            },
                                            {
                                                "text": "Do the shaft reach and surrounding clearance permit the required alignment and handle movement?",
                                                "kind": "boundary",
                                                "id": "target-screw-fit-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "manual-drive-control",
                        "name": "Manual drive control",
                        "description": "Describe how the operator's movement and torque reach the screw.",
                        "rationale": "Direct, ratcheting and torque-controlled screwdrivers support different operating decisions.",
                        "layers": [
                            {
                                "id": "drive-path",
                                "name": "Drive path",
                                "description": "Assess the handle-to-tip connection and available direction modes.",
                                "findings": [
                                    {
                                        "id": "rotation-transmission",
                                        "name": "Rotation transmission",
                                        "description": "Record how the screwdriver transmits rotation and whether its selected mechanism functions as intended.",
                                        "questions": [
                                            {
                                                "text": "Is the drive direct or ratcheting, and what direction or lock mode is currently selected?",
                                                "kind": "definition",
                                                "id": "rotation-transmission-q01"
                                            },
                                            {
                                                "text": "Does an appropriate functional check reveal unintended slipping, binding or lost engagement?",
                                                "kind": "measurement",
                                                "id": "rotation-transmission-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "torque-control",
                                "name": "Torque control",
                                "description": "Distinguish ordinary manual driving from documented torque-limiting or indicating capability.",
                                "findings": [
                                    {
                                        "id": "torque-task-capability",
                                        "name": "Torque-task capability",
                                        "description": "Record any torque-control mechanism, its usable range, setting and evidence of verification.",
                                        "questions": [
                                            {
                                                "text": "What documentation establishes the tool's torque-control range and current verification status, if applicable?",
                                                "kind": "provenance",
                                                "id": "torque-task-capability-q01"
                                            },
                                            {
                                                "text": "Can the required task torque be controlled or verified with this screwdriver and its current setting?",
                                                "kind": "action",
                                                "id": "torque-task-capability-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "driving-condition",
                        "name": "Driving condition",
                        "description": "Capture defects that affect screw engagement or the integrity of the assembled tool.",
                        "rationale": "Tip wear and failures in the handle, shaft or holder can make an otherwise matching screwdriver unsuitable.",
                        "layers": [
                            {
                                "id": "working-end-integrity",
                                "name": "Working-end integrity",
                                "description": "Assess the surfaces that contact the screw.",
                                "findings": [
                                    {
                                        "id": "tip-wear-and-damage",
                                        "name": "Tip wear and damage",
                                        "description": "Record rounding, chips, deformation and deposits that may compromise seating or torque transfer.",
                                        "questions": [
                                            {
                                                "text": "What wear, damage or contamination is visible on the screw-contacting surfaces?",
                                                "kind": "measurement",
                                                "id": "tip-wear-and-damage-q01"
                                            },
                                            {
                                                "text": "Does the observed condition warrant cleaning, bit replacement or withdrawal under the applicable instructions?",
                                                "kind": "action",
                                                "id": "tip-wear-and-damage-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "assembly-integrity",
                                "name": "Assembly integrity",
                                "description": "Assess the supporting structure and detachable connections.",
                                "findings": [
                                    {
                                        "id": "handle-shaft-and-retention",
                                        "name": "Handle, shaft and retention",
                                        "description": "Record cracks, bending, looseness and failure to retain fitted components.",
                                        "questions": [
                                            {
                                                "text": "Are the handle, shaft and their connection damaged, bent or loose?",
                                                "kind": "measurement",
                                                "id": "handle-shaft-and-retention-q01"
                                            },
                                            {
                                                "text": "Does the bit or extension remain secured by its intended retention mechanism during an appropriate check?",
                                                "kind": "measurement",
                                                "id": "handle-shaft-and-retention-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "permitted-screwdriving",
                        "name": "Permitted screwdriving",
                        "description": "Connect the screwdriver's documented capabilities and observed condition to a proposed action.",
                        "rationale": "Physical ability to engage a screw does not establish suitability for electrical exposure, striking or other special demands.",
                        "layers": [
                            {
                                "id": "special-use-evidence",
                                "name": "Special-use evidence",
                                "description": "Record evidence for capabilities that cannot be inferred from shape or colour.",
                                "findings": [
                                    {
                                        "id": "documented-use-limits",
                                        "name": "Documented use limits",
                                        "description": "Tie insulation, striking and other special-use claims to identifiable instructions and the actual tool configuration.",
                                        "questions": [
                                            {
                                                "text": "What markings and documentation support any claimed electrical-insulation or striking capability for this screwdriver?",
                                                "kind": "provenance",
                                                "id": "documented-use-limits-q01"
                                            },
                                            {
                                                "text": "Do the fitted components and observed condition satisfy the documented conditions of that claim?",
                                                "kind": "boundary",
                                                "id": "documented-use-limits-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "task-decision",
                                "name": "Task decision",
                                "description": "Determine the next action from fit, function, condition and relevant task requirements.",
                                "findings": [
                                    {
                                        "id": "use-change-or-withdraw",
                                        "name": "Use, change or withdraw",
                                        "description": "Record a task-specific suitability decision and any unresolved evidence needed before use.",
                                        "questions": [
                                            {
                                                "text": "For the proposed screw-driving task, should this screwdriver be used as configured, reconfigured or replaced?",
                                                "kind": "action",
                                                "id": "use-change-or-withdraw-q01"
                                            },
                                            {
                                                "text": "What observed change, such as repeated slipping or a loose bit, requires stopping and reassessing the tool?",
                                                "kind": "action",
                                                "id": "use-change-or-withdraw-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-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Slotted (flat-blade) screwdrivers",
                                            "Phillips (H-cross) screwdrivers",
                                            "Pozidriv screwdrivers",
                                            "Torx / hexalobular screwdrivers",
                                            "Hex-socket (Allen) screwdrivers",
                                            "Robertson (square-recess) screwdrivers",
                                            "Precision / watchmaker's screwdrivers",
                                            "Insulated electricians' screwdrivers (IEC 60900 / VDE)"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "scheme": "Wikidata",
                                                "value_or_pattern": "Q173186",
                                                "note": "Item for the hand tool screwdriver (not a specific manufacturer model)."
                                            },
                                            {
                                                "scheme": "HS / Harmonized System",
                                                "value_or_pattern": "8205.40",
                                                "note": "Customs heading for screwdrivers."
                                            },
                                            {
                                                "scheme": "UNSPSC",
                                                "value_or_pattern": "27111701",
                                                "note": "Commodity code for screwdrivers within hand tools."
                                            },
                                            {
                                                "scheme": "ISO tip marking",
                                                "value_or_pattern": "PH#, PZ#, SL <width> mm, TX/T#, HEX <A/F> mm",
                                                "note": "Trade marking of tip family and size on the blade or handle, as required by ISO 8764 and related assembly-tool standards."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "ISO 2380 (International Organization for Standardization): slotted screwdriver tips.",
                                            "ISO 8764 (International Organization for Standardization): Phillips and Pozidriv screwdriver tips, lengths, and marking.",
                                            "ISO 10664 (International Organization for Standardization): hexalobular internal driving feature (the Torx-type recess the tool must match).",
                                            "ISO 1703 (International Organization for Standardization): nomenclature of assembly tools for screws and nuts.",
                                            "IEC 60900 (International Electrotechnical Commission): insulated hand tools, including screwdrivers, for live working up to 1 000 V AC / 1 500 V DC.",
                                            "ASTM F1505 (ASTM International): insulated and insulating hand tools (U.S. counterpart practice to IEC 60900).",
                                            "ASME B107 hand-tool series (ASME): dimensional and performance requirements for flat-tip, Phillips, and related screwdrivers and bits.",
                                            "JIS B 1012 (Japanese Industrial Standards): Japanese cross-recess screw geometry that Phillips tips often fail to fit cleanly."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Driving and removing wood, machine, and self-tapping screws in construction, furniture, automotive, and appliance assembly.",
                                            "Terminal and panel work by electricians, using insulated screwdrivers on live or potentially live equipment.",
                                            "Precision assembly of electronics, instruments, and spectacles with small PH000-PH0, slotted, or Torx bits.",
                                            "Interchangeable 1/4-inch hex bits in ratchets, bit holders, cordless drills, and impact drivers on production lines and in trade kits.",
                                            "Improper but common secondary uses as a light pry, punch, or chisel, which is outside the tool's designed load path."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "quantity": "Tip size (Phillips / Pozidriv)",
                                                "typical_range": "PH/PZ 0-3 in general trade; 000-00 in precision work; 4 on large fasteners",
                                                "unit": "point number"
                                            },
                                            {
                                                "quantity": "Slotted blade width",
                                                "typical_range": "2.5-12",
                                                "unit": "mm"
                                            },
                                            {
                                                "quantity": "Torx size",
                                                "typical_range": "T6-T40 in common kits; T10-T30 dominate construction and automotive",
                                                "unit": "Torx designation"
                                            },
                                            {
                                                "quantity": "Exposed blade / shaft length",
                                                "typical_range": "40-250 for ordinary hand tools; stubby under ~40; extra-long above ~300",
                                                "unit": "mm"
                                            },
                                            {
                                                "quantity": "Bit shank",
                                                "typical_range": "6.35 (1/4 inch hex) for interchangeable bits; 4 mm and E-hex variants also used",
                                                "unit": "mm"
                                            },
                                            {
                                                "quantity": "Applied torque",
                                                "typical_range": "0.05-1 precision; 1-10 general hand driving; ~10-25 large cabinet/driver sizes",
                                                "unit": "N·m"
                                            },
                                            {
                                                "quantity": "Rated working voltage (insulated tools)",
                                                "typical_range": "1000 AC / 1500 DC under IEC 60900",
                                                "unit": "V"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Cam-out of Phillips (and worn) tips, rounding the screw recess and launching the blade off the head.",
                                            "Tip wear, chipping, or twisting when the wrong family or undersize tip is used, especially JIS recesses with Phillips bits.",
                                            "Handle-tang separation or cracked handle under high torque or impact.",
                                            "Shaft bend or twist from prying or from using the tool as a chisel.",
                                            "Insulation puncture or contamination on VDE tools, removing shock protection.",
                                            "Puncture and laceration injuries when the blade slips toward the holding hand.",
                                            "Fragment ejection if a hardened bit or blade snaps under bending load.",
                                            "Energized-circuit shock or short if an uninsulated shaft bridges live parts."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Canada: Robertson (square) recesses are ordinary in wood construction; they are uncommon as a default elsewhere.",
                                            "Europe: Pozidriv (PZ) is the usual wood-screw cross recess; handles are marked PZ, not PH, and a Phillips bit will cam out.",
                                            "United States: Phillips and slotted dominate DIY and many trades; 'flathead' is everyday speech for slotted.",
                                            "Japan and much East Asian electronics: JIS B 1012 cross recesses; a true JIS or 'Japanese Phillips' bit seats where a Western Phillips walks out.",
                                            "United Kingdom trade speech still uses 'crosshead' for Phillips/Pozidriv collectively.",
                                            "Security and brand-specific recesses (tri-wing, pentalobe, spanner) are concentrated in consumer electronics and public fittings rather than general hardware."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "name": "Nut driver",
                                                "difference": "A nut driver has an internal hex socket that fits an external hex nut or hex-head screw; a screwdriver's tip fits an internal slot or recess in the screw head."
                                            },
                                            {
                                                "name": "Hex key (Allen key)",
                                                "difference": "A hex key is a bent or T-handled bar of hexagonal stock used on internal-hex fasteners; a hex screwdriver is the same driving geometry on a screwdriver handle or bit, not a L-key."
                                            },
                                            {
                                                "name": "Awl / bradawl",
                                                "difference": "An awl is a pointed piercing or marking tool and cannot transmit driving torque into a formed screw recess."
                                            },
                                            {
                                                "name": "Chisel",
                                                "difference": "A chisel has a sharpened cutting bevel loaded in striking or paring; a screwdriver tip is a driving profile and is not a cutting edge."
                                            },
                                            {
                                                "name": "Screw extractor (easy-out)",
                                                "difference": "An extractor is a reverse-tapered, usually left-hand tool that bites a damaged recess; it is for removal after the screwdriver has already failed to engage."
                                            },
                                            {
                                                "name": "Phillips versus Pozidriv versus JIS bits",
                                                "difference": "Pozidriv has additional radial ribs and a blunter point and should be marked PZ; JIS recesses are shallower/tighter and often carry a factory dot; a Phillips (PH) bit is the one that cams out of the other two."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of screwdriver this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does the registry intend screwdriver to include powered and manual impact screwdrivers, or should those be linked neighbouring models?",
                "Where does the registry place the boundary between screwdrivers, hex keys and nut drivers when handle forms and screw-driving functions overlap?",
                "Which authoritative profile and sizing references should support identification, especially for easily confused cross-head profiles?",
                "What manufacturer-specific criteria establish acceptable tip wear, retention performance and torque-control verification?",
                "Which evidence and inspection requirements apply to special-use claims, particularly electrical insulation and permission to strike the tool?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 18,
                "questions": 28
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "device, machine or tool",
            "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.",
            "facetsInferred": true,
            "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.",
            "purpose": "Give an agent a durable, checkable way to recognise a screwdriver, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise a screwdriver, assess its fitness for a particular screw and task, and decide how it may be used, maintained or withdrawn from use.",
            "characteristics": {
                "substance": "material",
                "origin": "manufactured",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: DeWalt DW268, DeWalt DW257, DeWalt DW272, Hitachi W6V3, screwdriver bit, torque screwdriver, Yankee screwdriver, Tester screwdriver.",
                "8 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 95 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is."
            ],
            "openQuestionsForResearch": [
                "Which of the bundles below does a real task actually need, and which are ceremony?",
                "What does this thing have that the facets do not capture at all?",
                "Which neighbouring kind is most often confused with a screwdriver, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "matter you can touch",
            "physicalCharacter": [
                "Mobility varies between examples.",
                "Does nothing on its own; everything it does, something else did to it.",
                "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing."
            ],
            "whatCanBeDoneWithIt": [
                "observe it, measure it, record its state"
            ],
            "howItIsRecognised": [
                "Recognised by form, by the arrangement of its controls, and by markings - a plate, a model number, a certification mark. Form alone rarely separates two models that do very different things."
            ],
            "relatedModels": [
                {
                    "relation": "covers",
                    "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.",
                    "targets": [
                        "DeWalt DW268",
                        "DeWalt DW257",
                        "DeWalt DW272",
                        "Hitachi W6V3",
                        "screwdriver bit",
                        "torque screwdriver",
                        "Yankee screwdriver",
                        "Tester screwdriver"
                    ]
                }
            ],
            "standing": "Described in 95 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 8 finer distinctions are held inside this entry as names rather than as separate models.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one screwdriver from another, and a screwdriver from things that resemble it.",
                        "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.",
                        "layers": [
                            {
                                "id": "naming-and-identifiers",
                                "name": "Names and identifiers",
                                "description": "The names this thing goes by and the identifiers that survive translation and time.",
                                "findings": [
                                    {
                                        "id": "preferred-name-and-aliases",
                                        "name": "Preferred name, aliases and local names",
                                        "description": "Which name to use, which names mean the same thing, and which merely sound similar.",
                                        "questions": [
                                            {
                                                "id": "preferred-name-and-aliases-q01",
                                                "text": "What identifies and describes the name of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "preferred-name-and-aliases-q02",
                                                "text": "Who or what asserted this about the name of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "preferred-name-and-aliases-q03",
                                                "text": "What may an agent decide or do once the name of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    },
                                    {
                                        "id": "stable-identifiers",
                                        "name": "Stable identifiers and external keys",
                                        "description": "Identifiers that keep pointing at this kind of thing across systems and languages.",
                                        "questions": [
                                            {
                                                "id": "stable-identifiers-q01",
                                                "text": "What identifies and describes an identifier for a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "stable-identifiers-q02",
                                                "text": "Who or what asserted this about an identifier for a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "stable-identifiers-q03",
                                                "text": "What may an agent decide or do once an identifier for a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "classification-and-granularity",
                                "name": "Classification and granularity",
                                "description": "Where a screwdriver sits among kinds, and how finely a task needs to cut it.",
                                "findings": [
                                    {
                                        "id": "kind-and-parents",
                                        "name": "Kind, parents and neighbouring kinds",
                                        "description": "The classes this thing belongs to and the ones it is next to.",
                                        "questions": [
                                            {
                                                "id": "kind-and-parents-q01",
                                                "text": "What identifies and describes the kind of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "kind-and-parents-q02",
                                                "text": "Who or what asserted this about the kind of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "kind-and-parents-q03",
                                                "text": "What may an agent decide or do once the kind of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    },
                                    {
                                        "id": "distinguishing-features",
                                        "name": "Distinguishing features",
                                        "description": "What separates a screwdriver from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "distinguishing-features-q02",
                                                "text": "Who or what asserted this about what distinguishes a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "distinguishing-features-q03",
                                                "text": "What may an agent decide or do once what distinguishes a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "form-and-composition",
                        "name": "Form, composition and condition",
                        "description": "What a screwdriver is made of, what shape and size it takes, and what state it is in.",
                        "rationale": "A physical thing can be measured, and a model that cannot record its measurements cannot support any decision that depends on them.",
                        "layers": [
                            {
                                "id": "form-and-dimensions",
                                "name": "Form and dimensions",
                                "description": "Shape, size, mass and the ranges these take across examples.",
                                "findings": [
                                    {
                                        "id": "measurable-dimensions",
                                        "name": "Measurable dimensions and their units",
                                        "description": "The quantities worth recording and the units they are recorded in.",
                                        "questions": [
                                            {
                                                "id": "measurable-dimensions-q01",
                                                "text": "What identifies and describes the dimensions of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q02",
                                                "text": "Who or what asserted this about the dimensions of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q03",
                                                "text": "What may an agent decide or do once the dimensions of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "material-and-composition",
                                "name": "Material and composition",
                                "description": "Materials, parts and how they are put together.",
                                "findings": [
                                    {
                                        "id": "parts-and-materials",
                                        "name": "Parts and materials",
                                        "description": "What a screwdriver is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q02",
                                                "text": "Who or what asserted this about the composition of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q03",
                                                "text": "What may an agent decide or do once the composition of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-integrity",
                                "name": "Condition and integrity",
                                "description": "Wear, damage, health and the difference between working and broken.",
                                "findings": [
                                    {
                                        "id": "condition-assessment",
                                        "name": "Condition, damage and health",
                                        "description": "How the condition of a screwdriver is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q02",
                                                "text": "Who or what asserted this about the condition of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q03",
                                                "text": "What may an agent decide or do once the condition of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "place-and-movement",
                        "name": "Place and movement",
                        "description": "Where a screwdriver is, how it got there and where it may go (varies).",
                        "rationale": "A thing that can move needs its position recorded with a time, or every later claim about it is about a place it has left.",
                        "layers": [
                            {
                                "id": "location-and-placement",
                                "name": "Location and placement",
                                "description": "Position, containment and the reference frame the position is given in.",
                                "findings": [
                                    {
                                        "id": "position-and-frame",
                                        "name": "Position, container and reference frame",
                                        "description": "Where a screwdriver is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q02",
                                                "text": "Who or what asserted this about the location of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q03",
                                                "text": "What may an agent decide or do once the location of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "movement-and-transfer",
                                "name": "Movement and transfer",
                                "description": "How a screwdriver is carried, installed or relocated.",
                                "findings": [
                                    {
                                        "id": "movement-events",
                                        "name": "Movement events and constraints",
                                        "description": "What counts as a movement, what records it and what limits it.",
                                        "questions": [
                                            {
                                                "id": "movement-events-q01",
                                                "text": "What identifies and describes the movement of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q02",
                                                "text": "Who or what asserted this about the movement of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q03",
                                                "text": "What may an agent decide or do once the movement of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "state-and-lifecycle",
                        "name": "State and lifecycle",
                        "description": "The states a screwdriver passes through and the events that move it between them.",
                        "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.",
                        "layers": [
                            {
                                "id": "lifecycle-stages",
                                "name": "Lifecycle stages",
                                "description": "From coming into existence to ceasing to be one of these.",
                                "findings": [
                                    {
                                        "id": "stages-and-transitions",
                                        "name": "Stages and transitions",
                                        "description": "The stages worth naming and what moves a screwdriver between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "stages-and-transitions-q02",
                                                "text": "Who or what asserted this about the lifecycle of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "stages-and-transitions-q03",
                                                "text": "What may an agent decide or do once the lifecycle of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "observations-and-status",
                                "name": "Observations and current status",
                                "description": "What is observed about a screwdriver, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a screwdriver is recorded so that it can be superseded rather than overwritten.",
                                        "questions": [
                                            {
                                                "id": "observation-record-q01",
                                                "text": "What identifies and describes an observation of a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "observation-record-q02",
                                                "text": "Who or what asserted this about an observation of a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "observation-record-q03",
                                                "text": "What may an agent decide or do once an observation of a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "function-and-principle",
                        "name": "Function and operating principle",
                        "description": "What screwdriver is for and how it achieves it.",
                        "rationale": "Two devices with the same name can work on different principles, and the principle is what predicts failure and constrains use.",
                        "layers": [
                            {
                                "id": "intended-function",
                                "name": "Intended function",
                                "description": "The job it does, and the jobs it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-record",
                                        "name": "Function, principle and variants",
                                        "description": "What it does, how, and which variants do it differently.",
                                        "questions": [
                                            {
                                                "id": "function-record-q01",
                                                "text": "What function does screwdriver perform, on what operating principle, and which variants differ in that principle?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "function-record-q02",
                                                "text": "What use falls outside the intended function but happens in practice?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "capacity-and-rating",
                                "name": "Capacity and rating",
                                "description": "The numbers that say what it can do and where it stops.",
                                "findings": [
                                    {
                                        "id": "ratings",
                                        "name": "Ratings and their conditions",
                                        "description": "Rated capacity, power, throughput and the conditions each assumes.",
                                        "questions": [
                                            {
                                                "id": "ratings-q01",
                                                "text": "What ratings characterise screwdriver, in what units, and under what stated conditions?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "ratings-q02",
                                                "text": "What happens beyond the rating - degradation, refusal, damage - and how is that detected?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "operation-and-state",
                        "name": "Operation, controls and state",
                        "description": "How screwdriver is operated and what state it is in right now.",
                        "rationale": "An agent acting on a device needs its current state and the controls that change it, not just its specification.",
                        "layers": [
                            {
                                "id": "controls-and-modes",
                                "name": "Controls and modes",
                                "description": "What can be set, what that changes, and what is interlocked.",
                                "findings": [
                                    {
                                        "id": "control-surface",
                                        "name": "Control surface and interlocks",
                                        "description": "The settings available and the conditions that block them.",
                                        "questions": [
                                            {
                                                "id": "control-surface-q01",
                                                "text": "What controls and modes does screwdriver have, and what does each change?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "control-surface-q02",
                                                "text": "Which actions are interlocked or forbidden in which state, and what must be true before acting?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-maintenance",
                                "name": "Condition and maintenance",
                                "description": "Wear, service intervals, consumables and the line between working and broken.",
                                "findings": [
                                    {
                                        "id": "service-record",
                                        "name": "Condition, service and consumables",
                                        "description": "What is consumed, what is serviced, and how condition is judged.",
                                        "questions": [
                                            {
                                                "id": "service-record-q01",
                                                "text": "What consumables and service does screwdriver need, at what interval, and on whose authority?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "service-record-q02",
                                                "text": "What evidence separates a unit that is working from one that is out of service?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "kind-model-unit",
                        "name": "Kind, model and unit",
                        "description": "Whether a claim about screwdriver is about the kind, a product line, or one physical unit.",
                        "rationale": "This is the boundary most often got wrong for made things, and getting it wrong mixes a catalogue entry with the machine in the yard.",
                        "layers": [
                            {
                                "id": "level-of-reference",
                                "name": "Level of reference",
                                "description": "The three levels and what belongs at each.",
                                "findings": [
                                    {
                                        "id": "level-rules",
                                        "name": "What belongs to kind, model and unit",
                                        "description": "Which properties are shared by all of them and which are not.",
                                        "questions": [
                                            {
                                                "id": "level-rules-q01",
                                                "text": "Which facts about screwdriver hold for every one of them, which for a model, and which only for one unit?",
                                                "kind": "boundary"
                                            },
                                            {
                                                "id": "level-rules-q02",
                                                "text": "What identifies an individual unit, and what should an agent do when it has only the kind?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "standards-and-conformity",
                                "name": "Standards and conformity",
                                "description": "The standards a working example must meet and who attests it.",
                                "findings": [
                                    {
                                        "id": "conformity",
                                        "name": "Standards, marks and attestation",
                                        "description": "Which standard applies, who certifies, and what the mark means.",
                                        "questions": [
                                            {
                                                "id": "conformity-q01",
                                                "text": "Which standards govern screwdriver, issued by whom, and what does conformity actually assert?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "conformity-q02",
                                                "text": "What may an agent conclude from a certification mark, and what may it not?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a screwdriver came from and when it held.",
                        "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.",
                        "layers": [
                            {
                                "id": "source-and-authority",
                                "name": "Source and authority",
                                "description": "Who said it, on what evidence, and how strongly.",
                                "findings": [
                                    {
                                        "id": "claim-provenance",
                                        "name": "Claim provenance and confidence",
                                        "description": "The authority behind each claim about a screwdriver and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "claim-provenance-q02",
                                                "text": "Who or what asserted this about a claim about a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "claim-provenance-q03",
                                                "text": "What may an agent decide or do once a claim about a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "time-and-versions",
                                "name": "Time, versions and supersession",
                                "description": "When a claim was true, when it was learnt, and what replaced it.",
                                "findings": [
                                    {
                                        "id": "validity-and-supersession",
                                        "name": "Validity period and supersession",
                                        "description": "How an old claim about a screwdriver is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a screwdriver, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "validity-and-supersession-q02",
                                                "text": "Who or what asserted this about the validity of a claim about a screwdriver, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "validity-and-supersession-q03",
                                                "text": "What may an agent decide or do once the validity of a claim about a screwdriver is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 8,
                "layers": 17,
                "findings": 19,
                "questions": 51
            }
        }
    }
}