{"schema_version":1,"assessment_id":"eoa_inverse_innovation_exp03_opportunity320_20260801","source_experiment_id":"eoa_inverse_innovation_exp03_full320_20260801","cell_id":"negative_space_design__information_theory","archetype_slug":"negative_space_design","domain_slug":"information_theory","title":"Protected Forbidden Code Space for Early Desynchronization Detection","opportunity_summary":"Evaluate whether deliberately reserved invalid regions in a variable-length code can expose insertion-, deletion-, or boundary-induced misalignment earlier than a dense codebook, while remaining competitive with checksums or synchronization markers at equal usable rate. The mechanism is specific and safely testable, but its detection advantage, practical demand, scalability, and distinctiveness are unproven.","adopter_authorizer":"A protocol or codebook owner can authorize a versioned offline experiment; affected system owners would separately control any deployment or migration.","scores":{"meaningful_impact":{"score":3,"rationale":"Earlier detection could reduce plausible-but-wrong downstream symbols and integrity failures, but the packet provides no evidence about failure prevalence, severity in actual systems, or the adequacy of existing framing and checks."},"stakeholder_pull":{"score":2,"rationale":"The proposal identifies protocol owners, operators, implementers, senders, and downstream consumers, but supplies no evidence that any stakeholder experiences this problem frequently, demands a remedy, or would accept a coding-rate tradeoff."},"incremental_advantage":{"score":3,"rationale":"Reserved invalid regions could detect shifted decoding before block-boundary checks, but the effect is hypothetical and the packet explicitly allows that a checksum or synchronization marker may dominate on both detection and rate cost."},"distinctiveness_plausibility":{"score":3,"rationale":"The protected-reserve mechanism is concretely differentiated from dense coding and externally transmitted checks, but prior art is unsearched and no claim of novelty, rarity, or freedom to operate is supportable."},"technical_implementability":{"score":4,"rationale":"A finite code tree, bounded edit model, exhaustive edit-position simulation, and decoder invalid-state handling are technically tractable in an offline setting, although the reserve construction and shifted-parse reachability analysis still require formalization."},"adoption_authority_feasibility":{"score":4,"rationale":"The packet identifies a codebook or protocol owner for versioned experimentation and system owners for deployment decisions. Feasibility is reduced by decoder agreement, compatibility, and migration requirements."},"evidence_readiness":{"score":4,"rationale":"The proposal specifies baseline and rival comparisons, observable outcomes, exhaustive single-edit testing, falsifiers, and halt conditions. It is not fully ready until code-tree constraints and material-effect and rate-loss thresholds are preregistered."},"safety_net_benefit":{"score":4,"rationale":"The proposed mechanism adds an explicit invalid state that can halt plausible wrong output, while the experiment preserves existing checks and the baseline. It does not establish safe recovery, and premature halting may discard recoverable information."},"scalability":{"score":3,"rationale":"The mechanism can in principle be generated for multiple finite codebooks, but effectiveness may depend strongly on source distribution, code-tree geometry, edit model, and protocol transition support; no cross-setting evidence is supplied."}},"score_confidence":"MODERATE","costs":{"first_evidence":{"band_2026_usd":"10K_TO_50K","scope":"Formalize one bounded code-tree construction and edit model, preregister thresholds, implement the dense baseline, rate-matched reserved-space code, and checksum or synchronization-marker rival, then run exhaustive single-insertion and single-deletion simulations with trace review.","confidence":"MODERATE","assumptions":["A competent coding-theory and software researcher can use synthetic source distributions and bounded test blocks.","No proprietary production data, specialized hardware, certification, or live-system access is required.","The study covers one code family and a small declared set of source distributions."]},"initial_deployment_startup":{"band_2026_usd":"50K_TO_250K","scope":"Engineer and validate versioned encoder and decoder support in one owner-controlled test environment, including compatibility handling, recovery logic, telemetry, regression testing, and security review.","confidence":"LOW","assumptions":["The existing implementation is accessible and modifiable.","A dual-version or negotiated transition can be implemented without replacing underlying hardware.","This band excludes production rollout across multiple independent organizations."]},"operational_launch":{"band_2026_usd":"250K_TO_1M","scope":"Launch in one bounded operational protocol or product, including partner coordination, staged migration, dual-decoder support, monitoring, incident procedures, documentation, and comparative evaluation while retaining existing integrity controls.","confidence":"LOW","assumptions":["Only one protocol or product family is involved.","Existing checksums and safety metadata remain in place during evaluation.","No standards-wide mandate, hardware redesign, or large installed-base replacement is required."]},"annual_recurring":{"band_2026_usd":"50K_TO_250K","scope":"Maintain codebook versions and decoder compatibility, monitor invalid-state and recovery outcomes, investigate incidents, rerun edit and distribution tests, and support affected implementers.","confidence":"LOW","assumptions":["One bounded operational implementation is maintained.","Monitoring infrastructure largely exists.","Recurring work does not include frequent ecosystem-wide migrations or formal recertification."]}},"research_burden":"MODERATE","earliest_credible_horizon":"0_TO_3_MONTHS","pipeline_gates":{"recognizable_externally_supportable_problem":{"status":"YES","reason":"The candidate specifies a recognizable failure: an insertion, deletion, or boundary shift can yield plausible wrong symbols until an invalid state or external check intervenes. Whether it is prevalent externally remains unverified."},"identifiable_adopter_or_authorizer":{"status":"YES","reason":"A protocol or codebook owner is identified as the experimental authorizer, and affected system owners are identified as the authorities for any later deployment."},"distinct_testable_incremental_claim":{"status":"YES","reason":"At equal usable rate and error exposure, the reserved-space code is claimed to reduce silently decoded edits or wrong symbols before detection relative to both a dense baseline and a checksum or synchronization-marker rival."},"bounded_next_evidence_step":{"status":"YES","reason":"The sealed candidate authorizes an offline, bounded simulation across declared source distributions and every single insertion or deletion position, with named comparators and explicit falsifiers."},"no_unresolved_safety_or_authority_stop":{"status":"YES","reason":"The authorized next step is offline and versioned; production deployment, removal of existing checks, unversioned replacement, and fabrication or silent dropping of symbols are excluded, with defined halt and rollback conditions."},"implementation_cost_scope_and_range":{"status":"UNCERTAIN","reason":"The packet identifies relevant implementation components and actors but provides no codebase, protocol scale, compatibility burden, certification needs, staffing assumptions, or externally grounded resource evidence for deployment."}},"blocking_evidence":["No evidence establishes that current framing or integrity checks permit material silent desynchronization in a relevant use case.","The reserved code-tree construction and reachability of invalid states under shifted parses are not yet formalized.","No comparative result shows a material detection benefit at equal usable rate against both the dense baseline and the checksum or synchronization-marker rival.","Acceptable coding-rate loss, latency, recovery ambiguity, and material-effect thresholds have not been preregistered.","Prior art, stakeholder demand, compatibility burden, and cross-distribution robustness remain unmeasured."],"next_evidence_step":"Preregister a bounded offline study for one finite code family: specify the source distributions, code-tree constraints, rate-loss ceiling, material-effect thresholds, and recovery rule; compare a dense baseline, a rate-matched reserved-space construction, and a rate-matched checksum or synchronization-marker rival across every single insertion and deletion position in fixed-length test blocks. Reject the opportunity if existing controls already detect edits immediately with negligible wrong output, or if the reserve fails to materially reduce silent decodes or wrong symbols before detection at equal usable rate.","research_questions":["Which reserved-subtree constructions are reachable by the largest share of shifted parses without creating excessive codeword length or latency?","Do existing framing and integrity controls already make silent propagation negligible in candidate applications?","At equal usable rate, how do reserved space, checksums, and synchronization markers compare on detection delay, silent-decoding probability, and resynchronization ambiguity?","How sensitive is the result to source distribution, block length, insertion or deletion position, multiple edits, truncation, and outage-like inputs?","Can sender and receiver versions transition without decoder disagreement or ambiguity between invalid state, truncation, and channel outage?","Which protocol or codebook owners experience sufficient consequence to accept the measured rate, latency, and maintenance costs?","Does prior work already cover forbidden patterns, self-synchronizing codes, comma-free constructions, or equivalent internal invalid-space mechanisms?"] ,"recommendation":"PRIOR_ART_RESEARCH","uncertainty_constraints":["This is a closed-book assessment with no external validation.","Problem prevalence, stakeholder demand, market size, realized impact, and deployment economics are unmeasured.","Prior art is explicitly unsearched, so distinctiveness and novelty cannot be inferred.","Performance claims are hypotheses; no empirical advantage over baseline or rival is established.","Cost bands are resource-equivalent planning ranges based only on the stated scope, not observed implementation data."],"closed_book_prior_art_boundary":"The packet supports only that the proposed reserved-invalid-space mechanism is structurally distinguishable from its named dense-code and external-check comparators. It supplies no basis to claim novelty, uncommonness, patentability, freedom to operate, or absence of equivalent coding-theory methods."}