{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp06_four_proposal_generalization60_20260803","cell_id":"representation_independent_interface_contract__nanotechnology","arm":"COMPLETE_PROPOSAL_PORTFOLIO","candidate_id":"nanoparticle_concentration_observation_channel_contract","proposal_index":4,"version":0,"title":"Transduction-Independent Contract for Nanoparticle Concentration Observations","problem":"A nanoparticle-processing or monitoring application can consume sensor-specific outputs such as intensity values, electrical pulses, fitted peaks, calibration coefficients, numeric sentinels, and vendor quality flags. Downstream clients may perform their own conversions or assume undocumented behavior for saturation, calibration expiry, below-quantification results, missing samples, averaging windows, and uncertainty. Replacing the sensor or signal-processing backend can then change the scientific meaning of an apparently valid concentration number without changing the nominal read operation. The system lacks a representation-independent criterion for deciding whether an alternative observation channel preserves the promised measurement behavior.","actors":["Researchers preparing or processing nanoparticle suspensions","Engineers integrating nanoscale or nanoparticle sensor modules","Metrology personnel defining calibration and uncertainty policy","Software developers consuming concentration observations","Sensor and signal-processing implementers","Quality or safety authorities governing uses of measurement results"],"observable_state":"When the same synthetic or controlled input trace is processed by two channels claiming to report nanoparticle concentration, they can emit different units, numeric values, validity categories, calibration identifiers, time-window meanings, or treatments of saturation and missing data. A downstream client may also fail after substitution because it parses raw pulses, optical intensities, fit parameters, vendor flags, or special numeric values from the incumbent implementation.","consequence":"A transducer or analysis-backend change can silently turn an invalid, saturated, or out-of-scope observation into an ordinary number, or alter the quantity and time interval that the number denotes. Downstream monitoring and analysis therefore remain coupled to signal representation, and substitutability cannot be distinguished from superficial agreement on common cases.","affected_objective":"Preserve the declared meaning, validity, uncertainty, and applicability of nanoparticle concentration observations while allowing transduction and signal-processing implementations to change independently.","intervention":"Create an opaque NanoparticleConcentrationChannel defined by calibrated observation behavior rather than raw signal representation. A versioned capability profile declares the measurand, unit, particle and medium applicability conditions, concentration range, temporal support, permitted operating-condition envelope, calibration identity, and uncertainty semantics. Public operations inspect capabilities, bind an authorized calibration reference, configure an observation window, start or stop acquisition, read the next observation, query channel status, and perform a non-measuring self-check. Read returns a tagged abstract result: VALID with value, unit, uncertainty, observation interval, applicability profile, and calibration identity; BELOW_QUANTIFICATION; ABOVE_RANGE; INVALID_CONDITIONS; MISSING; or FAULT. Non-valid results cannot carry a client-usable numeric sentinel. Contracts specify operation preconditions, postconditions, state transitions, errors, and side-effect limits. Invariants require every VALID value to fall within the declared profile, carry an applicable unexpired calibration identity, and include its observation interval and uncertainty statement. Raw intensity, pulse timing, spectra, fitted parameters, filtering buffers, calibration equations, and vendor status codes remain hidden. Alternative implementations qualify only within the same capability profile after passing shared black-box, property-based, and contract-derived metamorphic tests.","structural_mapping":[{"archetype_element":"Abstract behavioral surface","domain_realization":"NanoparticleConcentrationChannel exposes capabilities, calibration binding, window configuration, acquisition lifecycle, typed observations, status, and self-check rather than raw sensor signals or fitting parameters."},{"archetype_element":"Abstract state model","domain_realization":"The channel occupies UNCONFIGURED, READY, ACQUIRING, DEGRADED, or FAULT state and emits observations belonging to an explicit tagged result space."},{"archetype_element":"Representation invariant","domain_realization":"Every VALID observation has a value within its declared range, an explicit unit and time interval, an applicable calibration identity, an uncertainty statement, and a capability profile matching the channel; non-valid observations contain no substitute numeric concentration."},{"archetype_element":"Abstraction function","domain_realization":"Raw optical, electrical, spectral, or simulated signals and their internal calibration calculations map to the same public lifecycle state and tagged concentration-observation semantics."},{"archetype_element":"Behavioral laws and operation sequences","domain_realization":"Supported unit conversion followed by its inverse preserves the abstract value within declared numerical tolerance; status and capability queries do not initiate acquisition; a rejected configuration leaves state unchanged; expired or inapplicable calibration cannot yield VALID; and stop followed by read produces the contract-defined non-acquiring outcome."},{"archetype_element":"Error and edge-case policy","domain_realization":"Invalid profiles, incompatible units, stale calibration, unsupported windows, out-of-envelope conditions, saturation, missing input, and internal faults have distinct typed outcomes rather than overloaded numbers or vendor codes."},{"archetype_element":"Side-effect limits","domain_realization":"The interface may configure and read its observation channel but may not alter a process, dose material, trigger an alarm response, modify a calibration record, or issue hidden commands to unrelated equipment."},{"archetype_element":"Hidden representation","domain_realization":"Waveforms, pulses, spectra, coefficients, fit models, filters, buffers, vendor flags, device registers, and diagnostic traces are inaccessible except through explicitly authorized diagnostic exports outside the substitutable surface."},{"archetype_element":"Conformance oracle","domain_realization":"One parameterized suite supplies synthetic traces and lifecycle sequences, then checks tagged outcomes, calibration rules, unit relations, invariants, and errors only through public operations."},{"archetype_element":"Substitutability rule","domain_realization":"An implementation is substitutable only for the specific contract version and capability profile it passes; interface conformance does not establish physical accuracy, calibration validity, or fitness outside that profile."},{"archetype_element":"Leakage and version stewardship","domain_realization":"Raw-value patterns, timing, diagnostic wording, opaque tokens, and ordering are audited for transducer leakage, while changed measurands, validity categories, uncertainty semantics, or side effects require explicit compatibility treatment."}],"mechanism_mapping":[{"mechanism_slug":"abstract_data_type_specification","role":"Defines the channel state and tagged observation value independently of transduction, with invariants and an abstraction function mapping each signal-processing backend to the public measurement meaning.","counterfactual_removal":"The proposal would provide common method names without a rigorous basis for deciding whether different raw-signal representations denote equivalent observations."},{"mechanism_slug":"opaque_type_or_module_boundary","role":"Restricts clients to channel and observation handles, withholding waveforms, pulse arrays, coefficients, filter state, fit parameters, and vendor codes.","counterfactual_removal":"Clients could continue reconstructing concentration from backend internals and would remain coupled to the incumbent transduction method."},{"mechanism_slug":"design_by_contract_clause","role":"Defines per-operation obligations, postconditions, violation outcomes, lifecycle transitions, and the prohibition on numeric sentinels for non-valid observations.","counterfactual_removal":"Implementations could disagree on calibration expiry, saturation, invalid conditions, acquisition state, or missing data while sharing signatures."},{"mechanism_slug":"interface_definition_language","role":"Encodes capability profiles, lifecycle operations, tagged observation variants, units, uncertainty fields, and typed errors in generated client and implementation bindings.","counterfactual_removal":"Handwritten bindings could collapse result variants, leak backend fields, or represent validity inconsistently across clients."},{"mechanism_slug":"black_box_contract_test_suite","role":"Provides the reusable acceptance gate for every channel implementation using only public configuration, acquisition, and observation behavior.","counterfactual_removal":"There would be no common operational rule for admitting a signal-processing backend as a substitute."},{"mechanism_slug":"metamorphic_behavior_test","role":"Checks representation-independent relations such as supported unit-conversion round trips, equivalent window declarations, and transformations explicitly declared by a capability profile when no single absolute synthetic output is the sufficient oracle.","counterfactual_removal":"Relational obligations that should hold across related runs would be checked only through isolated expected examples, leaving some semantic inconsistencies undetected."},{"mechanism_slug":"property_based_conformance_test","role":"Generates lifecycle sequences, capability boundaries, units, observation windows, calibration states, and tagged outcomes to test invariant preservation and error allocation.","counterfactual_removal":"The oracle would depend on selected fixtures and could miss combinations of configuration, calibration, and acquisition state."},{"mechanism_slug":"mock_fake_or_stub_implementation","role":"Supplies independent simulated channels with different raw-signal representations and injects saturation, missing input, stale calibration, delayed data, and internal faults without controlling laboratory equipment.","counterfactual_removal":"The bounded first step could not safely exercise exceptional observation semantics before any physical integration."},{"mechanism_slug":"representation_leakage_probe","role":"Inspects timing, diagnostics, identifiers, value precision, and authorized exports for clues that reveal the incumbent transducer or analysis representation.","counterfactual_removal":"Clients could infer and depend on hidden signal-processing details even though raw fields were nominally opaque."},{"mechanism_slug":"semantic_versioning_and_deprecation_gate","role":"Classifies changes to capability profiles, observation variants, uncertainty meaning, errors, and side effects and stages incompatible changes explicitly.","counterfactual_removal":"A channel update could silently redefine what a valid concentration observation means while retaining the same nominal version."}],"causal_chain":["Downstream clients consume raw sensor signals, calibration details, vendor flags, or under-specified numeric outputs.","Those representation details become implicit rules for converting signals and interpreting saturation, missing data, applicability, and uncertainty.","Changing the transducer or analysis backend therefore changes observation meaning or breaks clients despite an unchanged read operation.","The intervention defines an opaque channel and tagged observation type whose capability, calibration, validity, uncertainty, time support, errors, and side effects are explicit.","Opacity prevents direct dependence on raw transduction, while the abstraction function maps different backends to the same public observation semantics.","Shared example, property-based, and metamorphic tests exercise each implementation against the same lifecycle and measurement laws.","Leakage review identifies unpromised transducer clues, and version governance makes semantic changes visible.","A candidate backend can then be classified as conforming or nonconforming for a declared capability profile without treating its internal signal representation as the contract."],"baseline":"The bounded comparison baseline is a sensor-specific integration in which clients receive a numeric concentration plus raw or vendor-defined fields, perform local calibration or validity interpretation, and test replacements against selected example traces. Saturation, missingness, applicability, observation windows, and uncertainty are partly encoded through conventions or special values rather than one reusable behavioral oracle.","nearest_rivals":["Mandate one canonical raw-signal file format. This aligns representation but exposes transduction details and does not define calibration, validity, lifecycle, or uncertainty behavior.","Write a separate adapter for each sensor and client. Adapters translate fields but can encode inconsistent semantics and create pairwise substitution logic.","Return only a normalized concentration number. This simplifies consumption but erases saturation, applicability, calibration, uncertainty, and missingness distinctions required for meaningful substitution.","Freeze one transducer and analysis pipeline. This avoids an immediate replacement decision but retains client coupling and prevents independent backend evolution.","Requalify the entire downstream application whenever the sensor changes. Whole-application review may still be required for consequential uses, but it does not provide a reusable component-level conformance criterion."],"remaining_contrastive_claim":"The proposal's bounded claim is structural and falsifiable: a nanoparticle concentration channel can be evaluated independently of raw transduction when the binding interface includes capability, calibration, tagged validity, uncertainty, temporal support, errors, and side-effect limits, and when all implementations face the same behavioral oracle. It does not claim that interface conformance proves physical measurement accuracy or application fitness.","authority_safety":{"decision_authority":"A measurement-software steward may draft and test the contract with synthetic traces in a disconnected environment. Metrology personnel retain authority over calibration meaning, and existing process, quality, safety, or application owners retain authority over physical sensors and uses of observations.","authorized_first_step":"Implement the draft interface and conformance suite against two software-only simulated channels using synthetic traces; keep all instrument, process-control, alarm, and decision outputs disconnected.","excluded_actions":["Connecting the prototype to a physical sensor, process line, dosing system, alarm, interlock, or automated decision system","Creating, modifying, extending, or approving a calibration record","Replacing a validated measurement channel or changing an established acceptance criterion","Using simulated observations for material release, exposure assessment, medical, environmental, or safety decisions","Treating software conformance as evidence of accuracy, detection capability, calibration validity, or fitness for a real specimen","Hiding a decision-relevant modality limitation merely to make two capability profiles appear equivalent"],"halt_rollback":"Halt if the abstraction omits a decision-relevant measurand or applicability distinction, if a non-valid result can be consumed as an ordinary number, if prototype output reaches a physical or consequential workflow, or if conformance requires weakening calibration or uncertainty rules. Roll back by disabling the prototype bindings and simulators, preserving existing measurement and decision paths, and referring the unresolved semantic issue to metrology and application authorities."},"negative_tests":{"strongest_counterevidence":"A client and implementation audit shows that existing channels already expose only opaque, versioned, capability-scoped observations with explicit calibration, uncertainty, validity, and temporal semantics, and independent transducers already pass one representation-neutral behavioral suite. That would remove the proposed interface gap.","problem_falsifier":"Within a bounded synthetic-trace and client inventory, consumers neither access raw transduction details nor interpret vendor-specific values, and swapping simulated signal representations produces no unexplained difference in lifecycle, tagged validity, units, calibration handling, uncertainty, or temporal support. Any failures instead arise solely from separately governed physical accuracy.","intervention_falsifier":"Two independently designed simulated backends cannot implement a useful common capability profile without exposing transducer-specific fields, or both pass the suite while a held-out trace produces a contract-relevant disagreement in validity or observation meaning. Either result shows that the abstraction or oracle is inadequate.","risks":["A shared concentration label could conceal differences in the actual measurand, particle applicability, medium, sampling volume, or observation interval.","Uncertainty models from different implementations may not be meaningfully interchangeable even when represented by the same fields.","Synthetic traces may omit signal artifacts, drift, interference, hysteresis, or failure combinations relevant to physical channels.","Metamorphic relations could encode unjustified linearity or invariance assumptions unless each relation follows from the declared capability profile.","Clients may still infer transducer type from timing, precision, diagnostic patterns, or opaque identifiers.","A valid tagged observation could be mistaken for proof of physical accuracy or suitability for a consequential decision.","Diagnostic escape hatches could expose raw representation and become an unofficial client interface."]},"next_evidence_step":"Before implementing either simulator, specify one synthetic capability profile, the channel state machine, every observation variant, calibration and applicability rules, unit semantics, uncertainty fields, typed errors, and permitted side effects. Build two independent simulated implementations with different hidden representations, such as an intensity-and-fit pipeline and a pulse-counting pipeline, but make both consume the same bounded set of synthetic scenarios. Exercise ordinary readings, range boundaries, unit changes, expired calibration, unsupported windows, invalid conditions, saturation, missing samples, delayed observations, stop-and-read sequences, and injected faults. Add generated lifecycle sequences, only those metamorphic relations justified by the profile, and leakage probes for raw values, precision, timing, identifiers, and diagnostics. Classify each divergence as an implementation defect, test defect, or under-specified clause. End without physical connectivity; a need for public transducer-specific exceptions is evidence against proceeding.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"Proposal 1 defined an immutable spatial pattern value so geometry engines could substitute without changing nanoscale design meaning. This proposal does not represent target geometry; it governs calibrated observations emitted by alternative transduction and signal-processing channels. Proposal 2 defined a stateful scanning-probe manipulation controller with physical-motion commands, fault transitions, and actuator side effects. This proposal performs no motion or process control and instead constrains measurement interpretation, validity, uncertainty, and acquisition semantics. Proposal 3 defined an append-only specimen derivation and custody ledger across storage representations. This proposal neither records specimen ancestry nor substitutes a provenance store; its causal path runs from raw-signal dependencies through divergent calibration and validity interpretation to non-substitutable sensor channels. The NanoparticleConcentrationChannel can be adopted independently in a measurement integration without adopting the pattern, motion-control, or lineage contracts.","revision_record":{"parent_version":null,"progress_targets_addressed":["Fourth complete proposal","Materially distinct measurement-interpretation problem","Independent transduction-hiding intervention","Capability-scoped substitutability","Authority-bounded synthetic evidence","Explicit diversity from proposals 1, 2, and 3"],"conceptual_changes":["Initial version defines nanoparticle concentration observations through tagged validity, calibration, uncertainty, temporal support, and applicability rather than raw signals."],"operational_changes":["The first evidence step is restricted to synthetic traces and disconnected software-only channel implementations."],"evidence_changes":["Prior art remains unsearched; no external evidence, prevalence assertion, demand claim, or effect estimate is introduced."],"claim_changes":["The claim is limited to behavioral conformance within a declared capability profile and excludes physical accuracy or application fitness."]}}