{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp03_full320_20260801","cell_id":"layer_decay_and_expiration_management__music_musicology","trajectory_id":"R","attempt_index":0,"archetype_slug":"layer_decay_and_expiration_management","domain_slug":"music_musicology","decision":"CANDIDATE","problem_id":"superseded_digital_music_edition_layers_remain_authoritative","causal_lever_id":"explicit_lifecycle_states_for_editorial_layers","proposal":{"problem":"Digital critical-edition and corpus projects accumulate successive notation encodings, source transcriptions, emendations, annotations, renders, and editorial decisions. Superseded layers often remain discoverable without clear status, so scholars or performers may treat them as current; indiscriminate cleanup, however, can erase provenance and reproducibility.","actors_substrate":["music editors and project maintainers","performers and scholars using editions","libraries or repositories preserving project files","versioned notation encodings, annotations, renders, and editorial records"],"observable_state":"Multiple representations of the same passage remain accessible with missing or inconsistent current, superseded, archived, and deletion markers; users cite or perform from layers no longer endorsed by editors.","consequence":"Outdated readings compete with the current edition, maintenance and retrieval burdens grow, and cleanup risks breaking citations, derivations, or reconstruction of editorial reasoning.","affected_objective":"Keep digital music editions interpretable and bounded while preserving scholarly provenance, reproducibility, and historically significant states.","structural_mapping":[{"archetype_element":"sequential deposits","domain_realization":"Successive transcriptions, encodings, annotations, emendations, and rendered outputs are deposited during edition work.","claim_kind":"INFERENCE"},{"archetype_element":"stale layers mistaken for current truth","domain_realization":"An accessible but superseded reading can be mistaken for the project's endorsed reading when status metadata is absent.","claim_kind":"HYPOTHESIS"},{"archetype_element":"retention and dependency tension","domain_realization":"Old states burden discovery yet may remain necessary for citations, derivative files, provenance, or reconstruction.","claim_kind":"INFERENCE"},{"archetype_element":"managed disposition paths","domain_realization":"Layers receive active, superseded, warm, archived, quarantined, or removed states instead of remaining active by default.","claim_kind":"HYPOTHESIS"}],"component_map":[{"component":"layer_inventory_and_identity_map","status":"direct","domain_realization":"Registry of each work, passage, source, encoding, annotation, render, and version identifier."},{"component":"deposition_order_and_age_index","status":"direct","domain_realization":"Creation and supersession chronology for editorial deposits."},{"component":"retention_policy_matrix","status":"adapted","domain_realization":"Rules by layer class, scholarly significance, and reproducibility need."},{"component":"decay_function_or_aging_rule","status":"adapted","domain_realization":"Age lowers review priority only alongside use, validation, and supersession evidence."},{"component":"expiration_trigger_definition","status":"direct","domain_realization":"Supersession, project milestones, inactivity, or elapsed provisional status triggers review."},{"component":"layer_value_and_risk_score","status":"adapted","domain_realization":"Triage score combining citation use, provenance, uniqueness, staleness, and recreation cost."},{"component":"dependency_and_reconstruction_check","status":"direct","domain_realization":"Check citations, derived renders, apparatus links, and reconstruction paths before removal."},{"component":"pruning_or_archival_pathway","status":"direct","domain_realization":"Refresh, supersede, compact, archive, quarantine, or delete."},{"component":"preservation_exception_register","status":"direct","domain_realization":"Named holds for historically important, cited, contested, or unique layers."},{"component":"deletion_audit_and_rollback_window","status":"direct","domain_realization":"Logged soft deletion with a restoration interval."},{"component":"resource_budget_and_storage_tier","status":"adapted","domain_realization":"Budgets for active hosting, indexed archive, and deep preservation."},{"component":"review_cadence_and_revalidation_loop","status":"direct","domain_realization":"Periodic editor and repository review of classifications and holds."},{"component":"legal_hold_or_compliance_override","status":"adapted","domain_realization":"Donor, rights, institutional-record, or dispute holds override cleanup."},{"component":"hot_warm_cold_access_state","status":"adapted","domain_realization":"Current edition, indexed archive, and deep preservation states."},{"component":"orphan_layer_detection","status":"direct","domain_realization":"Identify layers with no live citations, derivations, or reconstruction role."},{"component":"supersession_marker","status":"direct","domain_realization":"Persistent status and successor link on displaced readings."},{"component":"layer_compaction_candidate_flag","status":"adapted","domain_realization":"Flag redundant renders or snapshots for lossless bundling or deduplication."},{"component":"rehydration_or_restore_procedure","status":"direct","domain_realization":"Documented recovery and validation of archived edition states."},{"component":"deletion_impact_estimate","status":"direct","domain_realization":"Estimate affected citations, users, derivatives, and recovery cost."},{"component":"stale_context_detector","status":"adapted","domain_realization":"Detect layers contradicted by later editorial decisions or detached from current schemas."}],"mechanism_dispositions":[{"slug":"age_weighted_value_score","disposition":"selected_supporting","contribution_type":"OPERATIONAL","adaptation_or_rejection":"Use only for review ranking; provenance, citation, and uniqueness veto age discounting.","counterfactual_removal":"Triage becomes slower but lifecycle governance remains viable."},{"slug":"archive_restore_test","disposition":"selected_load_bearing","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Sample archived encodings and renders and prove faithful reopening and link reconstruction.","counterfactual_removal":"Archival could silently become irreversible loss, defeating the preservation bargain."},{"slug":"cache_eviction_rule","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"Access recency is too weak to govern scholarly retention, and no hard fast-tier ceiling is established.","counterfactual_removal":"No causal or viability change."},{"slug":"dependency_safe_delete_check","disposition":"selected_load_bearing","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Trace citations, apparatus links, derivatives, and provenance edges before deletion.","counterfactual_removal":"Cleanup could break reproducibility or referenced scholarship."},{"slug":"lifecycle_storage_tiering_policy","disposition":"selected_supporting","contribution_type":"OPERATIONAL","adaptation_or_rejection":"Move inactive but valuable states from active discovery to indexed or deep preservation.","counterfactual_removal":"Authority confusion can still fall, but active storage and maintenance remain unnecessarily burdened."},{"slug":"log_rotation_and_cleanup_job","disposition":"considered_rejected","contribution_type":"NONE","adaptation_or_rejection":"Editorial layers are content-sensitive objects, not a homogeneous append-only stream safely purged by position.","counterfactual_removal":"No causal or viability change."},{"slug":"retention_schedule","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Map music-layer classes to review, preservation, and disposition rules with explicit holds.","counterfactual_removal":"Disposition returns to ad hoc judgment and exceptions become hidden."},{"slug":"soft_delete_quarantine_window","disposition":"selected_load_bearing","contribution_type":"SAFETY_GUARDRAIL","adaptation_or_rejection":"Hide candidates from ordinary discovery while retaining reversible recovery before destruction.","counterfactual_removal":"The first cleanup test exposes scholarship to irreversible mistakes."},{"slug":"stale_layer_detection_dashboard","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Inventory layers and flag contradiction, supersession, missing ownership, and schema drift.","counterfactual_removal":"The target layers remain unidentified, so stale authority is not systematically reduced."},{"slug":"time_to_live_ttl_policy","disposition":"selected_supporting","contribution_type":"OPERATIONAL","adaptation_or_rejection":"Apply renewable TTLs only to provisional previews, temporary exports, and review copies; expiry means review or archive, not automatic destruction.","counterfactual_removal":"Temporary layers require manual review but the main intervention remains viable."},{"slug":"tombstone_or_deletion_marker","disposition":"selected_load_bearing","contribution_type":"CORE_CAUSAL","adaptation_or_rejection":"Retain identity, disposition reason, date, and successor so citations resolve unambiguously.","counterfactual_removal":"Removed and superseded states become ambiguous and stale copies may regain apparent authority."}],"causal_chain":["Inventory identity-resolved editorial layers and detect superseded or context-stale states.","Apply class rules, value signals, preservation holds, and dependency checks.","Demote stale layers from active discovery while leaving tombstones and successor links.","Archive or quarantine eligible layers and verify restoration before any irreversible deletion.","Revalidate classifications so exceptions and active status do not silently become permanent.","Users encounter fewer obsolete layers as current while provenance remains reconstructable."],"baseline":"Projects keep most files in version-control, shared drives, or repository collections indefinitely and communicate the current version through naming conventions, folders, or maintainer knowledge.","nearest_rival":"Immutable version history with a single latest pointer; it preserves lineage but does not classify archival value, test restoration, govern exceptions, or retire redundant active artifacts.","authority_safety":{"affected_parties":["editors whose decisions are represented","performers and scholars relying on editions","repositories responsible for preservation","people or communities whose musical materials have rights or cultural restrictions"],"decision_authority":"The edition's designated scholarly editor and repository steward jointly approve rules; rights holders or community custodians control restricted materials within their authority.","authorized_first_step":"In one consenting project, inventory one work's layers, label status, and quarantine up to 20 clearly superseded non-unique renders or review copies for 30 days; delete nothing permanently.","excluded_actions":["automatic deletion based only on age or low access","altering the musical content of the endorsed edition","removing cited, unique, contested, restricted, or dependency-uncertain layers","overriding rights, donor, institutional, or community-custody conditions"],"halt_rollback":"Halt if any quarantined layer has an unresolved citation, derivative, rights objection, failed restore, or disputed scholarly value; restore all quarantined objects and labels from the audit record."}},"negative_tests":{"strongest_counterevidence":"If repositories already expose reliable current/superseded states and users rarely mistake old layers for endorsed readings, lifecycle governance adds process without addressing a material problem.","analogy_break":"Unlike fungible logs or caches, an old editorial state may gain historical value and its meaning depends on musical, philological, and cultural context; age cannot stand in for disposability.","failure_condition":"Identity resolution or dependency discovery is too incomplete to distinguish redundant artifacts from unique evidence safely.","problem_falsifier":"A bounded audit finds no materially stale-authority incidents, discovery burden, or maintenance cost attributable to accumulated edition layers.","intervention_falsifier":"Compared with the ordinary baseline, the pilot does not reduce retrieval of superseded layers as current, or it causes any unrecoverable citation, provenance, access, or reconstruction failure.","risks":["Composite scores create false precision and bias against old but significant evidence.","Demotion may make minority, contested, or culturally important readings less visible.","Archive formats or credentials may fail despite sampling.","Quarantine may conflict with deletion or rights obligations.","Tombstones and metadata can themselves accumulate or disclose restricted information."]},"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":0.78,"generator_notes":"Closed-book structural inference from the supplied packet; empirical prevalence and effect claims remain hypotheses."}