Wrap angles.
Keep appearance evidence explicit.

{
  "module": "Compo 29.03",
  "name": "orientation_texture_style_similarity",
  "version": "1.0-canonical",
  "canonical_main_title": "Orientation/texture/style similarity",
  "topic": "29_СХОДСТВО_И_ПОВТОРЯЕМОСТЬ",
  "scope": "EXPLICIT_UNORDERED_PAIR_COMPARISONS_FOR_ORIENTATION_AND_TEXTURE_STYLE_CHANNELS_OVER_IMMUTABLE_29_00_FEATURE_SCHEMA_WITH_CHANNEL_LOCAL_DISTANCES_ONLY",
  "main_topic_contract": {
    "topic_title": "Сходство и повторяемость",
    "topic_goal": "Измеряет сходство по независимым каналам — shape, size, color, tone, orientation, texture/style — и формирует similarity groups без потери источника сигнала.",
    "expected_output": "SimilarityRelation[], feature distances, similarity clusters",
    "planned_files": [
      "29.00 Similarity feature schema",
      "29.01 Shape/size similarity",
      "29.02 Color/tone similarity",
      "29.03 Orientation/texture/style similarity",
      "29.04 Multi-channel groups and tests"
    ]
  },
  "ownership": {
    "owner": "Compo29.03",
    "owns": [
      "SimilarityOrientationTextureStylePairRequest",
      "SimilarityOrientationValueEvidence",
      "SimilarityTextureStyleDistanceEvidence",
      "SimilarityTextureStyleSemanticKind taxonomy",
      "SimilarityFeatureDistanceDescriptor for ORIENTATION/TEXTURE_STYLE",
      "SimilarityRelation for ORIENTATION/TEXTURE_STYLE",
      "SimilarityOrientationTextureStyleRelationSet",
      "SimilarityOrientationTextureStyleAttachment",
      "canonical unordered subject-pair identity",
      "exact same-channel feature binding",
      "exact same-slot comparison rule",
      "cyclic orientation-distance derivation",
      "orientation unit/period/frame compatibility validation",
      "owner-normalized texture/style-distance validation",
      "semantic-kind preservation for texture/style comparator evidence",
      "symmetric relation materialization",
      "zero-distance semantics",
      "bounded explicit pair resolution",
      "non-mutating correction request"
    ],
    "does_not_own": [
      "feature extraction",
      "orientation extraction from geometry or pixels",
      "automatic 180° vs 360° period selection",
      "automatic angle unit conversion",
      "texture descriptor generation",
      "style descriptor generation",
      "texture/style comparator implementation internals",
      "automatic texture/style metric selection",
      "shape/size similarity — Compo29.01",
      "color/tone similarity — Compo29.02",
      "multi-channel aggregation — Compo29.04",
      "similarity thresholds — Compo29.04",
      "similarity clusters — Compo29.04",
      "cross-channel weighting — Compo29.04",
      "automatic pair Cartesian product",
      "proximity grouping — Topic28",
      "attention flow — Topic27",
      "universal similarity quality",
      "universal beautyScore"
    ]
  },
  "supported_channels": [
    "ORIENTATION",
    "TEXTURE_STYLE"
  ],
  "texture_style_semantic_kinds": [
    "TEXTURE",
    "STYLE",
    "OWNER_DEFINED"
  ],
  "distance_kinds": [
    "NORMALIZED_CYCLIC_ORIENTATION_DISTANCE",
    "OWNER_NORMALIZED_TEXTURE_STYLE_DISTANCE"
  ],
  "distance_semantics": {
    "orientation": {
      "source": "explicit angleValue + angleUnit + periodValue + orientationFrameRef evidence per feature",
      "formula": "delta = mod(abs(a-b), period); wrapped = min(delta, period-delta); normalizedDistance = wrapped / (period/2)",
      "range": "[0,1]",
      "zero": "same phase modulo the explicit period",
      "one": "half-period separation under the explicit period contract",
      "required_compatibility": "same angleUnit, same periodValue, same orientationFrameRef and owner",
      "period_inference": "NONE",
      "unit_conversion": "NONE",
      "perceptual_law_claim": false
    },
    "texture_style": {
      "source": "explicit owner-qualified comparator evidence",
      "range": "[0,1]",
      "zero": "identical under the named comparator contract",
      "one": "maximum mismatch only under comparator normalization contract",
      "semantic_kind": "TEXTURE, STYLE or explicit OWNER_DEFINED",
      "slot_binding": "exact featureSlotRef required",
      "universal_metric_claim": false
    },
    "relation": {
      "pair_identity": "unordered canonical subject pair A↔B",
      "symmetric": true,
      "same_channel_required": true,
      "same_feature_slot_required": true,
      "similarityScore": null,
      "thresholdDecision": null,
      "clusterMembership": "DEFERRED_TO_29_04"
    }
  },
  "policy": {
    "max_pair_requests": [
      1,
      131072
    ],
    "max_orientation_value_evidence": [
      0,
      262144
    ],
    "max_texture_style_distance_evidence": [
      0,
      131072
    ],
    "overflow": "N_A_NO_TRUNCATION",
    "duplicate_request_ref": "INVALID",
    "duplicate_channel_pair_slot_request": "INVALID",
    "duplicate_evidence_ref": "INVALID",
    "auto_pair_cartesian": false,
    "auto_orientation_extraction": false,
    "auto_orientation_period_selection": false,
    "auto_angle_unit_conversion": false,
    "auto_orientation_frame_alignment": false,
    "auto_texture_style_metric_selection": false,
    "auto_texture_style_distance_computation": false,
    "auto_cross_slot_comparison": false,
    "auto_cross_channel_aggregation": false,
    "auto_thresholding": false,
    "auto_clustering": false,
    "auto_scoring": false
  },
  "status_semantics": {
    "OK": "29.00 feature lineage resolves and requested ORIENTATION/TEXTURE_STYLE comparison produces a valid symmetric channel-local distance",
    "N_A": "feature/evidence missing, subject/feature/slot mismatch, orientation unit/period/frame mismatch, or bounds overflow",
    "INVALID": "malformed request/evidence, duplicate identity, self-pair, nonpositive orientation period, unsupported channel/semantic kind, or invalid upstream schema",
    "zero": "distance 0 is a valid equality observation under the channel contract and is never substituted for N_A"
  },
  "firewalls": [
    "orientation distance != orientation similarity score",
    "texture/style distance != texture/style similarity score",
    "distance zero != N_A",
    "orientation distance one != universal maximum directional difference",
    "orientation period != automatically 180 or 360 degrees",
    "orientation frame != attention direction",
    "same angle number in different frames != comparable orientation",
    "same texture/style slot != same texture/style value",
    "TEXTURE semantic kind != STYLE semantic kind",
    "feature distance != threshold decision",
    "SimilarityRelation != similarity cluster",
    "ORIENTATION relation != TEXTURE_STYLE relation",
    "orientation and texture/style relations cannot be averaged automatically",
    "pair request != Cartesian pair generation",
    "same-slot comparison != cross-slot inference",
    "angle-unit mismatch != automatic conversion",
    "period mismatch != automatic reconciliation",
    "missing orientation != angle zero",
    "Topic29 similarity != Topic28 proximity",
    "Topic29 similarity relation != Topic28 neighbor relation",
    "Topic29 orientation similarity != Topic27 attention flow",
    "N_A != 0",
    "INVALID != 0",
    "descriptor != score",
    "local != global",
    "geometry != interpretation",
    "heuristic != law",
    "no universal similarity threshold",
    "no universal beautyScore"
  ],
  "owns_metrics": [],
  "independent_numeric_votes": 0,
  "topic29ProgressAfterThisModule": "4/5 local",
  "next_module": "Compo 29.04 — Multi-channel groups and tests",
  "topic30_started": false,
  "publication": "NOT_VERIFIED"
}