{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"modular_decomposition__computer_science","arm":"CONSTRAINED_HIGH","candidate_id":"modular_decomposition__computer_science__CONSTRAINED_HIGH","decision":"PROPOSAL","abstention_reason":null,"proposal":{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"modular_decomposition__computer_science","arm":"CONSTRAINED_HIGH","candidate_id":"modular_decomposition__computer_science__CONSTRAINED_HIGH","proposal_index":1,"version":0,"title":"Passive Boundary-Marker Cassettes for Dense Optical Compute Interconnects","problem":"A dense optical interconnect between compute boards can contain many fibers, connectors, and routing spans inside one physically entangled harness. When endpoint optical integrity fails, the harness does not expose evidence aligned with replaceable physical units, so distinguishing a damaged span, contaminated connector, or board-side termination may require broad disassembly or replacement of the entire harness.","actors":["Compute-hardware technician","Optical interconnect harness","Compute-board optical ports","Low-power optical source and power meter","Replaceable fiber cassettes and passive boundary markers"],"observable_state":"One or more optical channels show excessive attenuation, unstable received power, or loss of continuity, while an endpoint test does not identify which physical span or interface is responsible.","consequence":"Diagnosis and repair can disturb healthy fibers, replace serviceable material, or keep the compute link unavailable while the monolithic harness is inspected.","affected_objective":"Maintain usable board-to-board optical connectivity while limiting fault diagnosis and material replacement to the implicated physical portion of the interconnect.","intervention":"Replace the monolithic harness with a small number of coherent, removable fiber cassettes corresponding to routing regions such as board exit, rack traverse, and destination entry. Each boundary uses a keyed blind-mate coupler with a passive test port or calibrated optical reflection feature. The interfaces preserve channel ordering and optical alignment, while a basic light source and meter—or direct observation of the calibrated reflections—can test each bounded span independently. A failed span can then be removed as its cassette without opening unaffected spans. No software is required to create the boundaries, expose the measurements, or permit local replacement.","structural_mapping":[{"archetype_element":"Entangled whole","domain_realization":"A continuous, densely routed multi-fiber compute interconnect whose internal spans cannot be independently accessed or replaced."},{"archetype_element":"Responsibility partitioning","domain_realization":"Each cassette carries the fibers and strain management for one coherent physical routing region."},{"archetype_element":"Module boundary","domain_realization":"Keyed optical couplers physically terminate one routing region and begin the next."},{"archetype_element":"Interface contract","domain_realization":"Fixed channel order, connector geometry, optical-loss allowance, bend envelope, and strain-transfer limits define what may cross each boundary."},{"archetype_element":"Encapsulation","domain_realization":"Fiber routing, strain relief, and protective sleeving inside a cassette can change without altering adjacent cassettes if the boundary conditions remain satisfied."},{"archetype_element":"Compatibility check","domain_realization":"Passive test ports or calibrated reflections expose transmitted power or continuity on both sides of each boundary."},{"archetype_element":"Integration policy","domain_realization":"Mated cassettes must preserve end-to-end channel identity, optical continuity, loss budget, and mechanical clearance."},{"archetype_element":"Locally manageable composed whole","domain_realization":"Each span can be measured and replaced separately while the assembled cassettes still form one board-to-board optical link."}],"mechanism_mapping":[{"mechanism_slug":"product_subsystem_decomposition","role":"Partitions the physical interconnect by routing responsibility rather than arbitrarily dividing individual fibers.","counterfactual_removal":"Without responsibility-aligned cassettes, the harness remains a monolithic replacement and inspection unit."},{"mechanism_slug":"mechanical_subassemblies","role":"Keyed removable cassettes make each bounded fiber span a physically separable service unit.","counterfactual_removal":"Removing separable mechanical boundaries eliminates local replacement even if fault position is known."},{"mechanism_slug":"passive_optical_boundary_instrumentation","role":"A test port or calibrated reflection at each boundary makes the optical condition of adjacent spans independently observable with a basic source and detector.","counterfactual_removal":"The cassettes remain replaceable, but endpoint measurements may not identify which cassette contains the fault, weakening the local-reasoning benefit."},{"mechanism_slug":"physical_interface_contract","role":"Connector keying, channel ordering, optical geometry, and strain limits allow independently handled cassettes to recombine into a valid link.","counterfactual_removal":"Modules could be exchanged physically but would not reliably preserve channel identity, alignment, or end-to-end optical function."}],"causal_chain":["The continuous harness is physically divided at boundaries chosen to correspond to coherent routing regions.","Keyed couplers constrain how independently handled cassettes reconnect and preserve channel identity.","Passive boundary features create directly measurable optical landmarks between adjacent spans.","Comparing light transmission or reflections at successive landmarks identifies the bounded span consistent with a seeded loss or discontinuity.","Because the identified span is also a removable cassette, inspection or replacement can remain local to that physical unit.","Reconnecting conforming cassettes restores a composed end-to-end path subject to the shared optical and mechanical invariants."],"baseline":"A continuous multi-fiber harness tested from its endpoints and inspected or replaced as one physical assembly after a link failure.","nearest_rivals":["A conventional optical time-domain reflectometer applied to a continuous harness, which can estimate fault distance without introducing cassette boundaries but may not align the estimate with an independently replaceable unit.","A conventional patch-panel design, which supplies connection points but may not partition routing responsibility, provide calibrated boundary evidence, or make each intervening span a coherent cassette.","Whole-harness substitution with a known-good spare, which can restore service without local diagnosis but replaces or handles the entire assembly.","Redundant optical paths or electronic failover, which preserve service during a fault but primarily provide failure tolerance rather than local physical tractability.","Additional endpoint power measurements, which can confirm degradation but do not necessarily distinguish internal spans."],"remaining_contrastive_claim":"The bounded claim is that aligning passive optical measurement landmarks with responsibility-defined, removable fiber cassettes can make the measured fault interval and the physical replacement unit coincide. Unlike endpoint testing, it exposes internal bounded states; unlike distance-only localization, it creates explicit replaceable boundaries; and unlike a generic patch panel, each segment has a coherent routing responsibility and a specified reintegration contract. Whether this alignment improves diagnosis enough to justify added interfaces remains an empirical question.","authority_safety":{"decision_authority":"The hardware laboratory or data-center owner responsible for the optical interconnect and its laser-safety and service rules.","authorized_first_step":"Construct and test only a low-power bench-scale link using spare fibers, non-production optical ports, and removable prototype boundary blocks.","excluded_actions":["Modification of a live production interconnect","Hot disconnection of energized equipment not designed for it","Use of optical power outside the laboratory's approved eye-safe class","Treating a prototype cassette as qualified production hardware","Bypassing connector-cleanliness, electrostatic-discharge, or equipment lockout protections"],"halt_rollback":"Stop if a boundary is visibly damaged, contamination cannot be controlled, optical power is uncertain, or added loss approaches the bench link's stated budget. Roll back by disconnecting the prototype and restoring the untouched continuous control harness; no production equipment is altered."},"negative_tests":{"strongest_counterevidence":"A continuous harness tested with ordinary endpoint instruments or an optical time-domain reflectometer identifies the correct repair location just as directly, while the proposed boundaries add insertion loss, contamination sites, bulk, and new failure modes.","problem_falsifier":"In blinded seeded-fault trials, existing endpoint or distance-based tests consistently identify an independently serviceable physical span without broad disassembly, showing that the claimed mismatch between fault evidence and repair unit is absent.","intervention_falsifier":"The proposal fails if boundary readings cannot distinguish which cassette contains seeded faults, if independently exchanged cassettes do not preserve channel identity and continuity, or if boundary-induced loss and instability consume the permitted optical margin.","risks":["Each added coupler can introduce attenuation, back-reflection, contamination, or intermittent contact.","Incorrect keying or channel mapping could cross-connect optical channels.","Rigid cassette boundaries could create bend or strain concentrations near connectors.","Added interface volume may conflict with dense rack clearances or cooling paths.","Over-decomposition could make cleaning, mating, and inventory burdens exceed local diagnostic benefits.","Low-power optical sources can still present eye hazards if applicable controls are ignored.","A technician may replace the indicated cassette even when the true cause is a board-side transmitter or receiver fault."]},"next_evidence_step":"Build one four-span, four-channel bench link with three prototype boundary blocks and one matched continuous-harness control. Before testing, specify allowable insertion loss, channel mapping, and bend limits. Have one person seed a bounded set of blinded physical faults—connector contamination, controlled bend loss, and one discontinuity—while another uses only a low-power source and power meter to name the implicated span. Record span identification, unnecessary spans opened, reconnection errors, added insertion loss, reflection behavior, and any boundary-caused faults. Stop after the predefined fault set and compare the results with endpoint testing of the continuous control; do not extrapolate beyond the bench configuration.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"Not assessed against other proposals because runtime isolation forbids inspecting them; this candidate is derived only from the supplied modular-decomposition archetype and computer-science domain card.","revision_record":{"parent_version":null,"progress_targets_addressed":["Construct one initial causally explicit candidate under the binding substrate constraint.","Distinguish modular decomposition from fault containment and interface-only interventions.","Provide a bounded falsifiable evidence step without a novelty or effect-size claim."],"conceptual_changes":["Initial version; no parent proposal.","Grounded modular decomposition in the physical service structure of an optical compute interconnect."],"operational_changes":["Initial version specifies coherent cassette boundaries, keyed interfaces, passive measurement landmarks, and bench-only testing safeguards."],"evidence_changes":["Prior art remains deliberately unsearched.","Initial evidence plan includes a continuous-harness control and blinded seeded faults."],"claim_changes":["The claim is limited to alignment of a measurable fault interval with a removable physical module.","No claim is made about novelty, prevalence, demand, or performance magnitude."]},"substrate_contract":{"primary_allowed_process":"HYBRID_OTHER_ALLOWED_PRIMARY","counterfactual_independence":"The essential effect is produced jointly by spatial-mechanical partitioning and passive optical measurement. With all software, algorithmic inference, databases, dashboards, reporting systems, incentives, permissions, and procedural enforcement removed, the keyed couplers still divide the fibers into removable spans, the passive ports or reflections still alter and expose the physical optical signal at each boundary, and a basic source and detector can still distinguish spans. Computation could record readings but is not needed to create fault-local evidence or local physical replaceability.","forbidden_channel_audit":"The proposal contains no software control loop, model, recommender, database, automated routing system, policy intervention, incentive, training program, or authorization scheme as its operative mechanism. The human bench protocol evaluates the device but does not generate its boundaries or optical landmarks. Safety authority limits deployment scope only. Removing every such wrapper leaves the physical cassettes, constrained mating geometry, passive optical landmarks, independent span measurement, and local replacement pathway intact."}}}