{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp03_full320_20260801","cell_id":"layer_decay_and_expiration_management__material_culture_museum_studies","trajectory_id":"R","attempt_index":0,"archetype_slug":"layer_decay_and_expiration_management","domain_slug":"material_culture_museum_studies","decision":"CANDIDATE","problem_id":"superseded_museum_interpretation_layers_remain_authoritative","causal_lever_id":"governed_interpretation_layer_lifecycle","proposal":{"problem":"Museum catalog records, provenance assertions, object descriptions, labels, and exhibition narratives can accumulate successive interpretations without consistently marking which version is current, restricted, superseded, or preserved only as historical evidence. Researchers, visitors, and staff may therefore encounter obsolete or contested claims as current authority, while indiscriminate cleanup can erase provenance, accountability, and the history of interpretation.","actors_substrate":["collection objects and their linked documentation","registrars, curators, conservators, archivists, and digital-collections staff","visitors and researchers","source, descendant, and Indigenous communities represented by objects or records","catalog, exhibition, and collections-management systems"],"observable_state":"Multiple dated interpretive records remain discoverable for the same object; some lack authoritative-version, supersession, access, dependency, or preservation-status metadata, and staff cannot reliably determine which can be demoted or removed without harming reconstruction.","consequence":"Interpretive error and avoidable search burden persist, harmful or disproven claims may retain institutional authority, and cleanup is either deferred or performed without adequate historical and dependency safeguards.","affected_objective":"Keep object interpretation current and legible while preserving provenance, contested histories, accountability, and lawful access obligations.","structural_mapping":[{"archetype_element":"sequential deposits","domain_realization":"Successive catalog entries, label texts, provenance assessments, exhibition narratives, and corrections linked to an object.","claim_kind":"INFERENCE"},{"archetype_element":"stale layers masquerading as current","domain_realization":"Superseded interpretations remain searchable or displayed without an unambiguous authority state.","claim_kind":"HYPOTHESIS"},{"archetype_element":"retention exceptions","domain_realization":"Historically significant, evidentiary, legally held, culturally sensitive, or community-contested versions require preservation or restricted access.","claim_kind":"INFERENCE"},{"archetype_element":"dependency-sensitive removal","domain_realization":"Exhibitions, publications, rights decisions, provenance chains, and audit histories may cite an older record.","claim_kind":"INFERENCE"},{"archetype_element":"differentiated disposition","domain_realization":"Refresh, supersede, restrict, archive, compact metadata, or delete by exception rather than treating every old interpretation alike.","claim_kind":"HYPOTHESIS"},{"archetype_element":"bounded searchable stack","domain_realization":"Current interfaces foreground authoritative interpretation while retained historical versions remain identifiable and reconstructable.","claim_kind":"HYPOTHESIS"}],"component_map":[{"component":"layer_inventory_and_identity_map","status":"direct","domain_realization":"Object-centered inventory of every linked interpretive version and stable identifier."},{"component":"deposition_order_and_age_index","status":"direct","domain_realization":"Creation, publication, revision, and supersession dates for each version."},{"component":"retention_policy_matrix","status":"adapted","domain_realization":"Rules by record type, evidentiary role, sensitivity, and historical value."},{"component":"decay_function_or_aging_rule","status":"adapted","domain_realization":"Age prompts review but never independently reduces cultural or evidentiary value."},{"component":"expiration_trigger_definition","status":"adapted","domain_realization":"New scholarship, corrected attribution, community challenge, broken reference, or scheduled review triggers reassessment."},{"component":"layer_value_and_risk_score","status":"adapted","domain_realization":"Transparent multi-criterion triage for current usefulness, harm, evidence, uniqueness, and reconstruction value."},{"component":"dependency_and_reconstruction_check","status":"direct","domain_realization":"Check citations, exhibitions, provenance chains, rights decisions, and audit trails before disposition."},{"component":"pruning_or_archival_pathway","status":"direct","domain_realization":"Refresh, supersede, restrict, archive, compact, or exceptionally delete."},{"component":"preservation_exception_register","status":"direct","domain_realization":"Named register for historically, culturally, legally, or evidentially necessary retention."},{"component":"deletion_audit_and_rollback_window","status":"direct","domain_realization":"Reasoned disposition log and recoverable quarantine before destruction."},{"component":"resource_budget_and_storage_tier","status":"adapted","domain_realization":"Public-current, staff-accessible, restricted, and preservation-repository tiers with explicit service costs."},{"component":"review_cadence_and_revalidation_loop","status":"direct","domain_realization":"Periodic revalidation of authority states, restrictions, holds, and exceptions."},{"component":"legal_hold_or_compliance_override","status":"direct","domain_realization":"Legal, repatriation, provenance-investigation, privacy, and records-management holds block disposal."},{"component":"hot_warm_cold_access_state","status":"adapted","domain_realization":"Prominent current display, secondary staff access, restricted archive, and preservation-only access."},{"component":"orphan_layer_detection","status":"direct","domain_realization":"Identify versions with no live citation or operational dependency, without equating orphanhood with worthlessness."},{"component":"supersession_marker","status":"direct","domain_realization":"Visible status linking an obsolete interpretation to its successor and explaining the change."},{"component":"layer_compaction_candidate_flag","status":"adapted","domain_realization":"Flag duplicative technical copies for lossless consolidation while retaining distinct claims and provenance."},{"component":"rehydration_or_restore_procedure","status":"direct","domain_realization":"Documented recovery of archived records with identifiers, links, formatting, and provenance intact."},{"component":"deletion_impact_estimate","status":"adapted","domain_realization":"Estimate interpretive, community, legal, evidentiary, and reconstruction harm before deletion."},{"component":"stale_context_detector","status":"adapted","domain_realization":"Signals include superseding scholarship, changed attribution, unresolved community challenge, and broken contextual links."}],"mechanism_dispositions":[{"slug":"age_weighted_value_score","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"Reject as a governing score: age does not predict cultural or evidentiary value and numerical aggregation could conceal contested judgments. Individual factors may inform review separately.","counterfactual_removal":"Removal avoids false precision and does not break the proposed lifecycle."},{"slug":"archive_restore_test","disposition":"selected_supporting","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Sample archived interpretation packages across formats and ages; verify readable content, provenance, identifiers, and links.","counterfactual_removal":"Without it, archival disposition could silently become irreversible loss."},{"slug":"cache_eviction_rule","disposition":"incompatible","contribution_type":"NONE","adaptation_or_rejection":"Access recency is not legitimate authority for demoting culturally or evidentially important interpretation under instantaneous capacity pressure.","counterfactual_removal":"No causal loss; ordinary storage planning replaces eviction."},{"slug":"dependency_safe_delete_check","disposition":"selected_load_bearing","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Trace known citations, exhibitions, provenance chains, rights decisions, and audit links; incomplete dependency knowledge forces review rather than a safe verdict.","counterfactual_removal":"Deletion could break reconstruction and accountability, hard-gating viability."},{"slug":"lifecycle_storage_tiering_policy","disposition":"selected_supporting","contribution_type":"OPERATIONAL","adaptation_or_rejection":"Use authority and sensitivity states, not age alone, to move versions among public-current, secondary, restricted, and preservation tiers.","counterfactual_removal":"The proposal could still mark supersession, but retained history would remain cluttered or unnecessarily exposed."},{"slug":"log_rotation_and_cleanup_job","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"Museum interpretation is not a homogeneous append-only stream; generational position cannot justify purging distinct historical claims.","counterfactual_removal":"No causal loss because disposition remains item- and class-sensitive."},{"slug":"retention_schedule","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Map documentation classes to review cadence, minimum preservation, permissible disposition, exceptions, and binding holds; do not presume a mandatory destruction maximum.","counterfactual_removal":"Without authoritative classes and exceptions, lifecycle decisions revert to inconsistent judgment."},{"slug":"soft_delete_quarantine_window","disposition":"selected_load_bearing","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Hide approved deletion candidates from ordinary use while preserving recoverability and an audit entry during a risk-sized grace period.","counterfactual_removal":"Errors become prematurely irreversible, making controlled cleanup unacceptable."},{"slug":"stale_layer_detection_dashboard","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Create an object-centered inventory and ranked review queue; all staleness flags remain contestable and require human validation.","counterfactual_removal":"Superseded but active records remain hard to find, so the intervention cannot target the problem."},{"slug":"time_to_live_ttl_policy","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"Fixed self-executing expiry is unsuitable for interpretation whose significance can grow or be rediscovered; scheduled review triggers replace automatic expiry.","counterfactual_removal":"No loss; avoiding TTL protects historically valuable material."},{"slug":"tombstone_or_deletion_marker","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Leave a durable supersession or deletion marker stating prior existence, reason, date, and successor or access route, subject to sensitivity controls.","counterfactual_removal":"Absence becomes ambiguous, enabling broken references and concealment of interpretive history."}],"causal_chain":["Inventory interpretation versions by object and expose missing lifecycle metadata.","Validated staleness signals and scheduled reviews identify records that may no longer deserve current authority.","Retention classes, community-sensitive exceptions, legal holds, and dependency checks constrain permissible disposition.","Supersession markers and access tiering remove stale claims from current-authority surfaces while preserving interpretive history.","Quarantine, audited decisions, and tested restoration keep correction reversible and reconstructable.","HYPOTHESIS: users then identify authoritative interpretation more reliably without losing accountable historical context."],"baseline":"Case-by-case correction: staff update a visible label or catalog field when an issue is noticed, while prior versions remain inconsistently stored, labeled, linked, or deleted.","nearest_rival":"A version-history repository that preserves every revision and provenance trail but does not govern which versions remain active, restricted, superseded, or eligible for disposition.","authority_safety":{"affected_parties":["source, descendant, and Indigenous communities","visitors and researchers","curatorial, registration, conservation, archival, and digital staff","people named or represented in sensitive records","rights holders and institutional records authorities"],"decision_authority":"A museum collections-governance group with records, curatorial, conservation, legal, and relevant community representation authorizes policy and irreversible disposition; software may only flag and execute approved reversible transitions.","authorized_first_step":"Run an eight-week, read-only inventory and sandboxed interface trial on at most 200 records from one collection; have qualified reviewers validate staleness flags and test supersession labels without deleting or restricting production records.","excluded_actions":["automatic destruction based on age, access frequency, or score","concealing contested history merely because it is embarrassing","changing object attribution or provenance without scholarly and community review","removing records under legal, repatriation, privacy, or investigation hold","publicly exposing restricted or culturally sensitive archival content"],"halt_rollback":"Halt if the trial exposes restricted material, misidentifies authoritative records in more than a predeclared tolerance, cannot reconstruct links, or affected-community review identifies unacceptable harm. Remove sandbox labels, restore the prior interface, preserve the audit log, and refer cases for human review."}},"negative_tests":{"strongest_counterevidence":"Older and superseded interpretations are themselves evidence of institutional practice, colonial classification, scholarly change, and contested memory; lifecycle governance could sanitize that history or privilege current institutional judgment.","analogy_break":"Museum records are interpretive and relational, not fungible cache entries: age and low access do not imply declining value, deletion may affect communities beyond the institution, and contradictory layers can all remain historically meaningful.","failure_condition":"The mapping fails where records cannot be separated into identifiable temporal versions or where the actual issue is solely inadequate preservation/version history rather than obsolete layers remaining active.","problem_falsifier":"A scoped audit finds that successive interpretations are already consistently identified, authority-labeled, dependency-linked, and segregated from current presentation, with no consequential stale-as-current retrieval or unresolved disposition backlog.","intervention_falsifier":"Compared with the ordinary baseline, the bounded trial does not improve blinded users' identification of the current authoritative interpretation or staff review time, or it causes lost provenance, broken reconstruction, inappropriate restriction, or materially greater community harm.","risks":["Presentism or institutional sanitization of uncomfortable historical interpretations","False staleness flags caused by unresolved scholarship or contested authority","Cultural harm or privacy breach from newly surfaced archival records","Opaque policy scores displacing curator and community judgment","Broken citations or provenance chains after demotion or deletion","Permanent exceptions recreating unbounded accumulation","Resource burdens shifted from search to review and archive maintenance"]},"null_rationale":null,"classification":{"candidate_kind":"MECHANISM_ADAPTATION","prior_art_status":"UNSEARCHED","evidence_maturity":"HYPOTHESIS"},"revision_change_log":{"revision_kind":"ORIGINAL","prior_problem_id":null,"prior_causal_lever_id":null,"problem_changed":false,"causal_lever_changed":false,"conceptual_changes":[],"operational_changes":[],"repairs_addressed":[]},"confidence":0.82,"generator_notes":"Closed-book structural transfer. Domain-specific prevalence and intervention effects are unverified; empirical statements are framed as hypotheses or falsifiable conditions."}