{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp06_four_proposal_generalization60_20260803","cell_id":"representation_independent_interface_contract__film_media_production","arm":"COMPLETE_PROPOSAL_PORTFOLIO","candidate_id":"ricc_fmp_01_cut_state_contract","proposal_index":1,"version":0,"title":"Representation-Independent Locked-Cut Contract for Post-Production Turnovers","problem":"A post-production pipeline may treat an editing system's track layout, nested sequences, clip identifiers, export fields, or effect encoding as the definition of a locked cut. Turnover tools and department scripts then depend on those representation details rather than on the cut's observable editorial meaning. A project relayout, exporter rewrite, or substitution of another editing implementation can consequently change downstream interpretation even when the intended cut has not changed.","actors":["Picture editor","Assistant editor","Post-production supervisor","Turnover coordinator","Sound editorial team","Color team","Visual-effects team","Post-production pipeline engineer"],"observable_state":"On duplicated locked-sequence material, client scripts read track names, nesting structure, application-specific clip identifiers, or raw export fields. Two implementations presented as representing the same cut can produce different shot order, source-frame boundaries, retime correspondence, transition attachment, revision comparisons, or error behavior. Staff must inspect and reconcile those differences before downstream conform work can proceed.","consequence":"Downstream departments can receive inconsistent interpretations of the same editorial state, tool or project-structure changes require coordinated repair, and the production cannot determine with a shared oracle whether a replacement cut adapter preserves the promised behavior.","affected_objective":"Preserve the editor-approved temporal and source-reference meaning of a locked cut across downstream turnovers while allowing editing-system representations and adapter implementations to change.","intervention":"Define an opaque LockedCut component by behavior rather than by timeline storage. Its public operations load and freeze a cut version, enumerate editorial events in output-time order, resolve each event's source interval and frame correspondence, expose explicitly sanctioned transition and retime semantics, compare two versions, derive a department-neutral change set, and validate the cut. Specify preconditions, postconditions, allowed errors, side-effect limits, lifecycle transitions, and version rules. Define the abstract state as an ordered set of editorial events with stable semantic identities, source references, output intervals, transformations, transition relations, and version lineage. Require invariants including valid source intervals, deterministic public ordering, unambiguous event identity within a version, explicit treatment of output overlap, and unchanged state after rejected operations. Keep tracks, bins, nesting, caches, project databases, exporter fields, and application-specific identifiers non-contractual. Place each adapter behind the same opaque interface and admit it as substitutable only after it passes the same black-box conformance oracle.","structural_mapping":[{"archetype_element":"Abstract behavioral surface","domain_realization":"LockedCut operations expose editorial-event order, source correspondence, transitions, retimes, version comparison, validation, errors, and lifecycle behavior without exposing an editing application's timeline structure."},{"archetype_element":"Hidden representation","domain_realization":"Track layout, nested sequences, bins, clip objects, cache organization, project-database records, and interchange-file fields remain private to each adapter."},{"archetype_element":"Abstract state and invariants","domain_realization":"The cut is modeled as versioned editorial events whose source and output intervals, semantic identities, transformations, transition relations, and lineage satisfy declared consistency rules."},{"archetype_element":"Abstraction mapping","domain_realization":"Each editing-system adapter maps its valid internal timeline states to the same LockedCut abstract state and rejects internal states that cannot be mapped unambiguously."},{"archetype_element":"Conformance oracle","domain_realization":"One black-box suite exercises identical cut fixtures and operation sequences against every adapter and compares only contract-level observations."},{"archetype_element":"Substitutability rule","domain_realization":"A candidate adapter is eligible to replace another only when it passes the shared behavioral suite and introduces no unsanctioned observable representation leakage."},{"archetype_element":"Stewarded evolution","domain_realization":"Changes to public editorial semantics require versioned review by the accountable post-production roles; conforming internal refactors do not."}],"mechanism_mapping":[{"mechanism_slug":"abstract_data_type_specification","role":"Defines the LockedCut abstract value space, representation invariants, and the mapping by which each editing-system timeline denotes that value.","counterfactual_removal":"Without it, the proposal would provide operations but no representation-independent account of when two differently stored cuts mean the same thing."},{"mechanism_slug":"design_by_contract_clause","role":"Assigns caller and component obligations for loading, freezing, querying, comparing, and rejecting ambiguous or invalid cut states.","counterfactual_removal":"Without it, adapters could disagree on edge cases and failures while still claiming to implement the same operation names."},{"mechanism_slug":"interface_definition_language","role":"Encodes the operation and result shapes in a machine-readable boundary from which clients and adapters can be generated.","counterfactual_removal":"Without it, clients could bypass or hand-reinterpret the intended boundary, although semantic clauses and tests would still be needed even with it."},{"mechanism_slug":"opaque_type_or_module_boundary","role":"Gives clients a LockedCut handle and declared operations while withholding tracks, project objects, raw exports, and adapter-private identifiers.","counterfactual_removal":"Without enforced opacity, downstream code could continue reading representation details and make nominal conformance irrelevant."},{"mechanism_slug":"black_box_contract_test_suite","role":"Runs contract-derived fixtures against every adapter and serves as the initial substitutability gate.","counterfactual_removal":"Without a shared oracle, replacement decisions would depend on informal inspection or implementation-specific tests."},{"mechanism_slug":"property_based_conformance_test","role":"Generates cut states and operation sequences to test ordering, identity, interval, rejection, and version-transition laws across implementations.","counterfactual_removal":"Without generated sequences, the oracle would be more exposed to untested combinations of trims, retimes, transitions, and revisions."},{"mechanism_slug":"representation_leakage_probe","role":"Checks observable outputs for accidental dependence on track order, application identifiers, raw field ordering, error wording, or other unpromised details.","counterfactual_removal":"Without the probe, adapters might pass promised-behavior tests while still exposing useful accidental details that clients could adopt as an unofficial interface."},{"mechanism_slug":"abstraction_barrier_code_review","role":"Requires reviewers to classify each new client dependency as contractual, sanctioned introspection, or prohibited reach-through.","counterfactual_removal":"Without human review, technically observable but semantically questionable dependencies could evade the mechanical checks."}],"causal_chain":["Downstream clients are redirected from editing-system timelines and raw exports to the opaque LockedCut operations.","The abstract state, invariants, and operation clauses state which editorial observations are dependable and which representation details are private.","Each adapter must map its internal timeline to that abstract state and reject states it cannot represent without ambiguity.","Generated boundary code and opacity prevent ordinary clients from reaching through to tracks, nesting, project objects, or exporter fields.","A common black-box oracle tests concrete examples and generated operation sequences against the declared behavior.","Leakage probing and dependency-focused review identify observable but unpromised details before they become accepted dependencies.","An adapter that satisfies the contract can be evaluated as a substitute without requiring clients to understand its internal timeline representation."],"baseline":"Keep the current editing-system export or project layout as the de facto specification. Downstream scripts parse its fields and conventions, assistant editors document exceptions, and each turnover is checked through department-specific manual comparison.","nearest_rivals":["Adopt one canonical interchange-file schema and require every department to parse it; this standardizes representation but does not by itself define operation sequences, invariants, errors, or behavioral substitution.","Freeze one editing application, exporter version, and project template for the production; this limits variation but preserves dependence on the chosen representation.","Build pairwise translators between each editing system and each downstream department; this addresses connections individually without establishing one abstract behavioral meaning.","Retain representation-specific exports and add manual picture, source-frame, and change-list checks at every turnover; this can detect discrepancies without making implementations substitutable."],"remaining_contrastive_claim":"The proposal is distinct from format standardization only if the binding definition of a locked cut is its operations, state transitions, invariants, error semantics, and behavioral oracle, with multiple internal timeline representations judged against that definition. If the intervention reduces to choosing canonical fields or a universal file layout, the representation-independent-interface claim fails.","authority_safety":{"decision_authority":"The post-production supervisor may authorize a sandbox trial; the picture editor must approve clauses that define editorial meaning, and affected department leads must approve the observations their turnovers are permitted to rely on.","authorized_first_step":"On read-only copies of one already approved short sequence, model the LockedCut contract and implement two independent sandbox adapters or one adapter plus a simple model implementation; run contract fixtures without replacing any live turnover path.","excluded_actions":["Do not modify source media, the approved edit, or production project files.","Do not route an active turnover through an unvalidated adapter.","Do not infer or alter creative intent when an internal timeline maps ambiguously; return a declared ambiguity error.","Do not expose raw project objects or application-specific identifiers as convenient escape hatches.","Do not treat passing the bounded sandbox suite as authorization for production substitution."],"halt_rollback":"Stop if the trial changes any source artifact, cannot preserve read-only isolation, produces an unexplained semantic divergence, or requires hiding information a department has declared necessary. Discard the sandbox adapters and continue using the existing turnover process; the copied fixtures and contract draft may be retained for analysis."},"negative_tests":{"strongest_counterevidence":"Downstream departments may genuinely require representation-specific construction information—such as editorial layer intent or effect-building detail—that cannot be recovered from a shared abstract cut without loss. If those details are necessary obligations rather than accidental dependencies, hiding them would make the interface incomplete.","problem_falsifier":"Inspection of the bounded sequence would falsify the proposed problem if downstream consumers use only explicitly documented editorial observations, do not inspect representation details, and equivalent representations yield the same turnover interpretation; or if observed discrepancies arise from unresolved creative decisions or incorrect source metadata rather than representation coupling.","intervention_falsifier":"The intervention would be falsified if two independently written adapters can satisfy every stated contract test yet produce materially different downstream conforms, or if making the contract sufficient requires exposing the editing application's track, nesting, identifier, or export representation as contractual.","risks":["The abstract model may omit editorial meaning needed by a particular department.","The contract may over-specify incidental ordering or identity behavior and freeze valid implementations.","Fixtures and generated cases may miss rare combinations of transitions, retimes, or source substitutions.","A simple model implementation may encode the same mistaken semantic assumptions as the contract author.","Opacity may impede legitimate diagnosis unless sanctioned, read-only introspection is narrowly defined.","Contract governance may shift creative interpretation from accountable editors to pipeline implementers.","Clients may decode or depend on application-specific metadata that remains observable despite the nominal boundary."]},"next_evidence_step":"Using only read-only copies, select one short locked sequence containing straight cuts, a transition, a retime, a nested construction, and a revision. Before implementing adapters, write the abstract state, operation clauses, five to ten contract-derived examples, and several laws such as deterministic enumeration, unchanged state after rejected input, stable comparison under representation-only relayout, and freeze idempotence. Run the same suite against a deliberately simple model and one editing-system adapter, then relayout the copied timeline without changing intended playback and rerun it. Record every divergence as a candidate adapter defect, contract defect, ambiguous creative case, or evidence that the hypothesized representation coupling is absent.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"Single-proposal sealed generation; no comparative portfolio context was used.","revision_record":{"parent_version":null,"progress_targets_addressed":["Initial complete candidate grounded in the supplied archetype, mechanisms, and film-production domain card.","Representation-independent causal structure made explicit through an abstract cut state, hidden timeline representations, a shared oracle, and a substitution rule.","Authority, rollback, rival explanations, falsifiers, and a bounded read-only evidence step specified."],"conceptual_changes":["Instantiated the abstract component as a versioned LockedCut rather than as a generic media interchange format.","Separated editorial meaning from editing-system tracks, nesting, project objects, and export fields."],"operational_changes":["Limited the first trial to read-only copies of one approved short sequence.","Required ambiguous mappings to fail explicitly instead of being resolved automatically.","Made production substitution and live-turnover routing out of scope for the first step."],"evidence_changes":["Set prior-art status to unsearched.","Defined observations that could distinguish representation coupling from creative ambiguity or metadata defects.","Added independent-model, relayout, example-based, property-based, and leakage checks."],"claim_changes":["Made no claim of novelty, prevalence, demand, or effect size.","Conditioned the proposal's contrastive claim on behavioral substitution rather than canonical file standardization."]}}