GEN2-003: add typed World referent foundation

adapters/postgres/world_repository.go

@@ -0,0 +1,108 @@
+package postgres
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"git.cin.su/m/Assistant/contracts/world"
+	worlddomain "git.cin.su/m/Assistant/modules/world/domain"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type WorldRepository struct{ pool *pgxpool.Pool }
+
+func OpenWorld(ctx context.Context, config ContinuityConfig) (*WorldRepository, error) {
+	pool, err := openPool(ctx, config)
+	if err != nil {
+		return nil, err
+	}
+	return &WorldRepository{pool: pool}, nil
+}
+
+func (r *WorldRepository) Close() { r.pool.Close() }
+
+func (r *WorldRepository) SaveKindDefinition(ctx context.Context, value world.WorldObjectKindDefinition) error {
+	if err := worlddomain.ValidateKindDefinition(value); err != nil {
+		return err
+	}
+	var parentOwner, parentKind, parentID string
+	var parentRevision *uint64
+	if value.ParentKindRef != nil {
+		parentOwner, parentKind, parentID = value.ParentKindRef.OwnerNamespace, value.ParentKindRef.SemanticKind, string(value.ParentKindRef.StableID)
+		if value.ParentKindRef.Revision != nil {
+			revision := uint64(*value.ParentKindRef.Revision)
+			parentRevision = &revision
+		}
+	}
+	_, err := r.pool.Exec(ctx, `INSERT INTO world.kind_definitions(kind_definition_id,kind_key,revision,display_name,parent_owner_namespace,parent_semantic_kind,parent_stable_id,parent_revision,lifecycle,definition_digest,recorded_at_unix_millis) VALUES($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11) ON CONFLICT(kind_definition_id) DO NOTHING`, value.ID, value.KindKey, value.Revision, value.DisplayName, parentOwner, parentKind, parentID, parentRevision, value.Lifecycle, value.DefinitionDigest, value.RecordedAt)
+	return err
+}
+
+func (r *WorldRepository) SaveObject(ctx context.Context, value world.WorldObject) error {
+	if err := worlddomain.ValidateObject(value); err != nil {
+		return err
+	}
+	_, err := r.pool.Exec(ctx, `INSERT INTO world.objects(world_object_id,principal_id,kind_owner_namespace,kind_semantic_kind,kind_stable_id,kind_revision,lifecycle,created_at_unix_millis) VALUES($1,$2,$3,$4,$5,$6,$7,$8) ON CONFLICT(world_object_id) DO NOTHING`, value.ID, value.PrincipalID, value.KindDefinitionRef.OwnerNamespace, value.KindDefinitionRef.SemanticKind, value.KindDefinitionRef.StableID, value.KindRevision, value.Lifecycle, value.CreatedAt)
+	return err
+}
+
+func (r *WorldRepository) SaveAlias(ctx context.Context, value world.WorldAlias) error {
+	if err := worlddomain.ValidateAlias(value); err != nil {
+		return err
+	}
+	_, err := r.pool.Exec(ctx, `INSERT INTO world.aliases(world_alias_id,principal_id,world_object_id,alias,recorded_at_unix_millis) VALUES($1,$2,$3,$4,$5) ON CONFLICT(world_alias_id) DO NOTHING`, value.ID, value.PrincipalID, value.ObjectID, value.Alias, value.RecordedAt)
+	return err
+}
+
+func (r *WorldRepository) SaveFacetDefinition(ctx context.Context, value world.FacetDefinition) error {
+	if err := worlddomain.ValidateFacetDefinition(value); err != nil {
+		return err
+	}
+	payload, err := json.Marshal(value.ValueType)
+	if err != nil {
+		return fmt.Errorf("encode facet value type: %w", err)
+	}
+	_, err = r.pool.Exec(ctx, `INSERT INTO world.facet_definitions(facet_definition_id,kind_key,revision,facet_key,value_type,definition_digest,recorded_at_unix_millis) VALUES($1,$2,$3,$4,$5,$6,$7) ON CONFLICT(facet_definition_id) DO NOTHING`, value.ID, value.KindKey, value.Revision, value.FacetKey, payload, value.DefinitionDigest, value.RecordedAt)
+	return err
+}
+
+func (r *WorldRepository) SaveRelationDefinition(ctx context.Context, value world.RelationDefinition) error {
+	if err := worlddomain.ValidateRelationDefinition(value); err != nil {
+		return err
+	}
+	_, err := r.pool.Exec(ctx, `INSERT INTO world.relation_definitions(relation_definition_id,kind_key,revision,relation_key,target_kind_key,definition_digest,recorded_at_unix_millis) VALUES($1,$2,$3,$4,$5,$6,$7) ON CONFLICT(relation_definition_id) DO NOTHING`, value.ID, value.KindKey, value.Revision, value.RelationKey, value.TargetKindKey, value.DefinitionDigest, value.RecordedAt)
+	return err
+}
+
+func (r *WorldRepository) SaveResolution(ctx context.Context, value world.IdentityResolutionDecisionRecord) error {
+	if err := worlddomain.ValidateResolution(value); err != nil {
+		return err
+	}
+	candidates, err := json.Marshal(value.Candidates)
+	if err != nil {
+		return fmt.Errorf("encode resolution candidates: %w", err)
+	}
+	evidence, err := json.Marshal(value.Evidence)
+	if err != nil {
+		return fmt.Errorf("encode resolution evidence: %w", err)
+	}
+	_, err = r.pool.Exec(ctx, `INSERT INTO world.identity_resolution_decisions(resolution_decision_id,principal_id,candidates,decision,evidence,confidence_millis,decided_at_unix_millis,revision) VALUES($1,$2,$3,$4,$5,$6,$7,$8) ON CONFLICT(resolution_decision_id) DO NOTHING`, value.ID, value.PrincipalID, candidates, value.Decision, evidence, value.ConfidenceMillis, value.DecidedAt, value.Revision)
+	return err
+}
+
+func (r *WorldRepository) SaveLineage(ctx context.Context, value world.WorldLineage) error {
+	if err := worlddomain.ValidateLineage(value); err != nil {
+		return err
+	}
+	sources, err := json.Marshal(value.SourceRefs)
+	if err != nil {
+		return fmt.Errorf("encode lineage sources: %w", err)
+	}
+	successors, err := json.Marshal(value.SuccessorRefs)
+	if err != nil {
+		return fmt.Errorf("encode lineage successors: %w", err)
+	}
+	_, err = r.pool.Exec(ctx, `INSERT INTO world.lineage(lineage_id,operation,source_refs,successor_refs,recorded_at_unix_millis) VALUES($1,$2,$3,$4,$5) ON CONFLICT(lineage_id) DO NOTHING`, value.ID, value.Operation, sources, successors, value.RecordedAt)
+	return err
+}

contracts/configuration/primitives.go

@@ -0,0 +1,7 @@
+package configuration
+
+import "git.cin.su/m/Assistant/platform/ids"
+
+// SemanticReference is a typed cross-owner reference; settings remain
+// Configuration-owned records.
+type SemanticReference = ids.SemanticRef

contracts/epistemics/primitives.go

@@ -0,0 +1,7 @@
+package epistemics
+
+import "git.cin.su/m/Assistant/platform/ids"
+
+// SemanticReference identifies evidence-related records without transferring
+// canonical ownership to Epistemics.
+type SemanticReference = ids.SemanticRef

contracts/self/primitives.go

@@ -0,0 +1,7 @@
+package self
+
+import "git.cin.su/m/Assistant/platform/ids"
+
+// SemanticReference lets SELF cite evidence and capabilities without owning
+// their canonical state.
+type SemanticReference = ids.SemanticRef

contracts/situation/primitives.go

@@ -0,0 +1,7 @@
+package situation
+
+import "git.cin.su/m/Assistant/platform/ids"
+
+// SemanticReference keeps Situation references transport-neutral while
+// ContextScope semantics remain owned by Situation.
+type SemanticReference = ids.SemanticRef

contracts/world/primitives.go

@@ -0,0 +1,270 @@
+package world
+
+import (
+	"fmt"
+
+	"git.cin.su/m/Assistant/contracts/identity"
+	"git.cin.su/m/Assistant/platform/clock"
+	"git.cin.su/m/Assistant/platform/ids"
+)
+
+// SemanticReference is the transport envelope used by World contracts. It is
+// a reference only; it does not expose another owner's storage.
+type SemanticReference = ids.SemanticRef
+
+type PrincipalRealm string
+
+const (
+	RealmPersonal PrincipalRealm = "PERSONAL"
+	RealmShared   PrincipalRealm = "SHARED"
+	RealmPublic   PrincipalRealm = "PUBLIC"
+	RealmSystem   PrincipalRealm = "SYSTEM"
+)
+
+type SensitivityClass string
+
+const (
+	SensitivityPublic          SensitivityClass = "PUBLIC"
+	SensitivityPrivate         SensitivityClass = "PRIVATE"
+	SensitivityRestricted      SensitivityClass = "RESTRICTED"
+	SensitivitySecretReference SensitivityClass = "SECRET_REFERENCE"
+)
+
+type ValueTypeKind string
+
+const (
+	ValueString    ValueTypeKind = "STRING"
+	ValueInteger   ValueTypeKind = "INTEGER"
+	ValueDecimal   ValueTypeKind = "DECIMAL"
+	ValueBoolean   ValueTypeKind = "BOOLEAN"
+	ValueTime      ValueTypeKind = "TIME"
+	ValueDuration  ValueTypeKind = "DURATION"
+	ValueEnum      ValueTypeKind = "ENUM"
+	ValueReference ValueTypeKind = "REFERENCE"
+	ValueBinaryRef ValueTypeKind = "BINARY_REF"
+	ValueList      ValueTypeKind = "LIST"
+	ValueStruct    ValueTypeKind = "STRUCT"
+)
+
+type ValueField struct {
+	Name string
+	Type ValueTypeSpec
+}
+
+type ValueTypeSpec struct {
+	Kind          ValueTypeKind
+	Element       *ValueTypeSpec
+	Fields        []ValueField
+	EnumValues    []string
+	ReferenceKind string
+}
+
+type WorldObjectID ids.StableID
+type KindDefinitionID ids.StableID
+type WorldAliasID ids.StableID
+type FacetDefinitionID ids.StableID
+type RelationDefinitionID ids.StableID
+type ResolutionDecisionID ids.StableID
+type LineageID ids.StableID
+
+type LifecycleState string
+
+const (
+	LifecycleActive          LifecycleState = "ACTIVE"
+	LifecycleMerged          LifecycleState = "MERGED"
+	LifecycleSplit           LifecycleState = "SPLIT"
+	LifecycleRetired         LifecycleState = "RETIRED"
+	LifecycleUnknownIdentity LifecycleState = "UNKNOWN_IDENTITY"
+)
+
+type WorldObject struct {
+	ID                WorldObjectID
+	PrincipalID       identity.PrincipalID
+	KindDefinitionRef SemanticReference
+	KindRevision      ids.Revision
+	Lifecycle         LifecycleState
+	CreatedAt         clock.Instant
+}
+
+type WorldObjectKindDefinition struct {
+	ID               KindDefinitionID
+	KindKey          string
+	Revision         ids.Revision
+	DisplayName      string
+	ParentKindRef    *SemanticReference
+	Lifecycle        LifecycleState
+	DefinitionDigest string
+	RecordedAt       clock.Instant
+}
+
+type WorldAlias struct {
+	ID          WorldAliasID
+	PrincipalID identity.PrincipalID
+	ObjectID    WorldObjectID
+	Alias       string
+	RecordedAt  clock.Instant
+}
+
+type FacetDefinition struct {
+	ID               FacetDefinitionID
+	KindKey          string
+	Revision         ids.Revision
+	FacetKey         string
+	ValueType        ValueTypeSpec
+	DefinitionDigest string
+	RecordedAt       clock.Instant
+}
+
+type RelationDefinition struct {
+	ID               RelationDefinitionID
+	KindKey          string
+	Revision         ids.Revision
+	RelationKey      string
+	TargetKindKey    string
+	DefinitionDigest string
+	RecordedAt       clock.Instant
+}
+
+type ResolutionDecision string
+
+const (
+	ResolutionSame       ResolutionDecision = "SAME"
+	ResolutionDistinct   ResolutionDecision = "DISTINCT"
+	ResolutionMerge      ResolutionDecision = "MERGE"
+	ResolutionSplit      ResolutionDecision = "SPLIT"
+	ResolutionUnresolved ResolutionDecision = "UNRESOLVED"
+)
+
+type IdentityResolutionCandidate struct {
+	ObjectRef  SemanticReference
+	Evidence   []SemanticReference
+	Confidence int64
+}
+
+type IdentityResolutionDecisionRecord struct {
+	ID               ResolutionDecisionID
+	PrincipalID      identity.PrincipalID
+	Candidates       []IdentityResolutionCandidate
+	Decision         ResolutionDecision
+	Evidence         []SemanticReference
+	ConfidenceMillis int64
+	DecidedAt        clock.Instant
+	Revision         ids.Revision
+}
+
+type WorldLineage struct {
+	ID            LineageID
+	Operation     ResolutionDecision
+	SourceRefs    []SemanticReference
+	SuccessorRefs []SemanticReference
+	RecordedAt    clock.Instant
+}
+
+func (w WorldObject) Validate() error {
+	if w.ID == "" || !w.KindDefinitionRef.Valid() || !w.KindRevision.Valid() || !validLifecycle(w.Lifecycle) || !w.CreatedAt.Valid() {
+		return fmt.Errorf("world object is incomplete")
+	}
+	return nil
+}
+
+func (k WorldObjectKindDefinition) Validate() error {
+	if k.ID == "" || k.KindKey == "" || !k.Revision.Valid() || k.DisplayName == "" || !validLifecycle(k.Lifecycle) || k.DefinitionDigest == "" || !k.RecordedAt.Valid() {
+		return fmt.Errorf("world kind definition is incomplete")
+	}
+	if k.ParentKindRef != nil && !k.ParentKindRef.Valid() {
+		return fmt.Errorf("world kind parent reference is invalid")
+	}
+	return nil
+}
+
+func (a WorldAlias) Validate() error {
+	if a.ID == "" || a.ObjectID == "" || a.Alias == "" || !a.RecordedAt.Valid() {
+		return fmt.Errorf("world alias is incomplete")
+	}
+	return nil
+}
+
+func (f FacetDefinition) Validate() error {
+	if f.ID == "" || f.KindKey == "" || !f.Revision.Valid() || f.FacetKey == "" || f.DefinitionDigest == "" || !f.RecordedAt.Valid() {
+		return fmt.Errorf("facet definition is incomplete")
+	}
+	return f.ValueType.Validate()
+}
+
+func (r RelationDefinition) Validate() error {
+	if r.ID == "" || r.KindKey == "" || !r.Revision.Valid() || r.RelationKey == "" || r.TargetKindKey == "" || r.DefinitionDigest == "" || !r.RecordedAt.Valid() {
+		return fmt.Errorf("relation definition is incomplete")
+	}
+	return nil
+}
+
+func (d IdentityResolutionDecisionRecord) Validate() error {
+	if d.ID == "" || !validDecision(d.Decision) || len(d.Candidates) == 0 || d.ConfidenceMillis < 0 || !d.DecidedAt.Valid() || !d.Revision.Valid() {
+		return fmt.Errorf("identity resolution decision is incomplete")
+	}
+	for _, candidate := range d.Candidates {
+		if !candidate.ObjectRef.Valid() || candidate.Confidence < 0 || candidate.Confidence > 1000 {
+			return fmt.Errorf("identity resolution candidate is invalid")
+		}
+		for _, evidence := range candidate.Evidence {
+			if !evidence.Valid() {
+				return fmt.Errorf("identity resolution evidence reference is invalid")
+			}
+		}
+	}
+	return nil
+}
+
+func (l WorldLineage) Validate() error {
+	if l.ID == "" || (l.Operation != ResolutionMerge && l.Operation != ResolutionSplit) || len(l.SourceRefs) == 0 || len(l.SuccessorRefs) == 0 || !l.RecordedAt.Valid() {
+		return fmt.Errorf("world lineage is incomplete")
+	}
+	return nil
+}
+
+func validLifecycle(value LifecycleState) bool {
+	return value == LifecycleActive || value == LifecycleMerged || value == LifecycleSplit || value == LifecycleRetired || value == LifecycleUnknownIdentity
+}
+
+func validDecision(value ResolutionDecision) bool {
+	return value == ResolutionSame || value == ResolutionDistinct || value == ResolutionMerge || value == ResolutionSplit || value == ResolutionUnresolved
+}
+
+func (s ValueTypeSpec) Validate() error {
+	if s.Kind == "" {
+		return fmt.Errorf("value type kind is required")
+	}
+	switch s.Kind {
+	case ValueList:
+		if s.Element == nil {
+			return fmt.Errorf("list element type is required")
+		}
+		return s.Element.Validate()
+	case ValueStruct:
+		if len(s.Fields) == 0 {
+			return fmt.Errorf("struct fields are required")
+		}
+		seen := map[string]struct{}{}
+		for _, field := range s.Fields {
+			if field.Name == "" {
+				return fmt.Errorf("struct field name is required")
+			}
+			if _, ok := seen[field.Name]; ok {
+				return fmt.Errorf("duplicate struct field %q", field.Name)
+			}
+			seen[field.Name] = struct{}{}
+			if err := field.Type.Validate(); err != nil {
+				return fmt.Errorf("field %s: %w", field.Name, err)
+			}
+		}
+	case ValueEnum:
+		if len(s.EnumValues) == 0 {
+			return fmt.Errorf("enum values are required")
+		}
+	case ValueReference:
+		if s.ReferenceKind == "" {
+			return fmt.Errorf("reference kind is required")
+		}
+	}
+	return nil
+}

contracts/world/primitives_test.go

@@ -0,0 +1,17 @@
+package world
+
+import "testing"
+
+func TestValueTypeSpecValidatesTypedRecursiveShape(t *testing.T) {
+	spec := ValueTypeSpec{Kind: ValueStruct, Fields: []ValueField{{Name: "name", Type: ValueTypeSpec{Kind: ValueString}}, {Name: "refs", Type: ValueTypeSpec{Kind: ValueList, Element: &ValueTypeSpec{Kind: ValueReference, ReferenceKind: "world.object"}}}}}
+	if err := spec.Validate(); err != nil {
+		t.Fatalf("ValueTypeSpec.Validate() = %v", err)
+	}
+}
+
+func TestValueTypeSpecRejectsDuplicateFields(t *testing.T) {
+	spec := ValueTypeSpec{Kind: ValueStruct, Fields: []ValueField{{Name: "same", Type: ValueTypeSpec{Kind: ValueString}}, {Name: "same", Type: ValueTypeSpec{Kind: ValueString}}}}
+	if err := spec.Validate(); err == nil {
+		t.Fatal("duplicate fields were accepted")
+	}
+}

contracts/world/types_test.go

@@ -0,0 +1,22 @@
+package world
+
+import (
+	"testing"
+
+	"git.cin.su/m/Assistant/platform/clock"
+	"git.cin.su/m/Assistant/platform/ids"
+)
+
+func TestWorldObjectValidationKeepsReferentSeparateFromClaims(t *testing.T) {
+	object := WorldObject{ID: "object-1", KindDefinitionRef: ids.SemanticRef{OwnerNamespace: "world", SemanticKind: "kind", StableID: "kind-1"}, KindRevision: 1, Lifecycle: LifecycleActive, CreatedAt: clock.Instant(1)}
+	if err := object.Validate(); err != nil {
+		t.Fatalf("WorldObject.Validate() = %v", err)
+	}
+}
+
+func TestIdentityResolutionRequiresEvidenceBackedCandidates(t *testing.T) {
+	decision := IdentityResolutionDecisionRecord{ID: "decision-1", Decision: ResolutionSame, Candidates: []IdentityResolutionCandidate{{ObjectRef: ids.SemanticRef{OwnerNamespace: "world", SemanticKind: "object", StableID: "object-1"}, Confidence: 900}}, DecidedAt: clock.Instant(1), Revision: 1}
+	if err := decision.Validate(); err != nil {
+		t.Fatalf("IdentityResolutionDecisionRecord.Validate() = %v", err)
+	}
+}

database/migrations/046_world_foundation.sql

@@ -0,0 +1,82 @@
+BEGIN;
+
+CREATE SCHEMA IF NOT EXISTS world;
+SET ROLE world_role;
+
+CREATE TABLE IF NOT EXISTS world.kind_definitions (
+  kind_definition_id TEXT PRIMARY KEY,
+  kind_key TEXT NOT NULL,
+  revision BIGINT NOT NULL CHECK (revision > 0),
+  display_name TEXT NOT NULL,
+  parent_owner_namespace TEXT NOT NULL DEFAULT '',
+  parent_semantic_kind TEXT NOT NULL DEFAULT '',
+  parent_stable_id TEXT NOT NULL DEFAULT '',
+  parent_revision BIGINT,
+  lifecycle TEXT NOT NULL,
+  definition_digest TEXT NOT NULL,
+  recorded_at_unix_millis BIGINT NOT NULL CHECK (recorded_at_unix_millis > 0),
+  UNIQUE (kind_key, revision)
+);
+
+CREATE TABLE IF NOT EXISTS world.objects (
+  world_object_id TEXT PRIMARY KEY,
+  principal_id TEXT,
+  kind_owner_namespace TEXT NOT NULL,
+  kind_semantic_kind TEXT NOT NULL,
+  kind_stable_id TEXT NOT NULL,
+  kind_revision BIGINT,
+  lifecycle TEXT NOT NULL,
+  created_at_unix_millis BIGINT NOT NULL CHECK (created_at_unix_millis > 0)
+);
+
+CREATE TABLE IF NOT EXISTS world.aliases (
+  world_alias_id TEXT PRIMARY KEY,
+  principal_id TEXT,
+  world_object_id TEXT NOT NULL,
+  alias TEXT NOT NULL,
+  recorded_at_unix_millis BIGINT NOT NULL CHECK (recorded_at_unix_millis > 0)
+);
+
+CREATE TABLE IF NOT EXISTS world.facet_definitions (
+  facet_definition_id TEXT PRIMARY KEY,
+  kind_key TEXT NOT NULL,
+  revision BIGINT NOT NULL CHECK (revision > 0),
+  facet_key TEXT NOT NULL,
+  value_type JSONB NOT NULL,
+  definition_digest TEXT NOT NULL,
+  recorded_at_unix_millis BIGINT NOT NULL CHECK (recorded_at_unix_millis > 0),
+  UNIQUE (kind_key, facet_key, revision)
+);
+
+CREATE TABLE IF NOT EXISTS world.relation_definitions (
+  relation_definition_id TEXT PRIMARY KEY,
+  kind_key TEXT NOT NULL,
+  revision BIGINT NOT NULL CHECK (revision > 0),
+  relation_key TEXT NOT NULL,
+  target_kind_key TEXT NOT NULL,
+  definition_digest TEXT NOT NULL,
+  recorded_at_unix_millis BIGINT NOT NULL CHECK (recorded_at_unix_millis > 0),
+  UNIQUE (kind_key, relation_key, revision)
+);
+
+CREATE TABLE IF NOT EXISTS world.identity_resolution_decisions (
+  resolution_decision_id TEXT PRIMARY KEY,
+  principal_id TEXT,
+  candidates JSONB NOT NULL,
+  decision TEXT NOT NULL,
+  evidence JSONB NOT NULL,
+  confidence_millis BIGINT NOT NULL CHECK (confidence_millis >= 0),
+  decided_at_unix_millis BIGINT NOT NULL CHECK (decided_at_unix_millis > 0),
+  revision BIGINT NOT NULL CHECK (revision > 0)
+);
+
+CREATE TABLE IF NOT EXISTS world.lineage (
+  lineage_id TEXT PRIMARY KEY,
+  operation TEXT NOT NULL,
+  source_refs JSONB NOT NULL,
+  successor_refs JSONB NOT NULL,
+  recorded_at_unix_millis BIGINT NOT NULL CHECK (recorded_at_unix_millis > 0)
+);
+
+RESET ROLE;
+COMMIT;

dev/ACTIVE_TASK.json

@@ -1,5 +1,5 @@
 {
-  "task_file": "dev/tasks/GEN2-001-accept-gen2-owner-registry-and-dependency-rules.json",
-  "task_id": "GEN2-001",
-  "task_revision": 1
-}
+  "task_file": "dev/tasks/GEN2-003-add-narrow-world-owner-and-typed-vocabulary.json",
+  "task_revision": 1,
+  "task_id": "GEN2-003"
+}

modules/world/README.arch.md

@@ -0,0 +1,8 @@
+# world
+
+World owns typed referents, vocabulary and identity-resolution lineage. It
+does not own observations, claims, beliefs, or factual values about a
+referent. Those remain Epistemics-owned evidence.
+
+World domain code does not import adapters, runtime or provider packages and
+does not write another owner's canonical state.

modules/world/domain/world.go

@@ -0,0 +1,17 @@
+package domain
+
+import "git.cin.su/m/Assistant/contracts/world"
+
+func ValidateObject(value world.WorldObject) error { return value.Validate() }
+
+func ValidateKindDefinition(value world.WorldObjectKindDefinition) error { return value.Validate() }
+
+func ValidateAlias(value world.WorldAlias) error { return value.Validate() }
+
+func ValidateFacetDefinition(value world.FacetDefinition) error { return value.Validate() }
+
+func ValidateRelationDefinition(value world.RelationDefinition) error { return value.Validate() }
+
+func ValidateResolution(value world.IdentityResolutionDecisionRecord) error { return value.Validate() }
+
+func ValidateLineage(value world.WorldLineage) error { return value.Validate() }

modules/world/ports/repository.go

@@ -0,0 +1,17 @@
+package ports
+
+import (
+	"context"
+
+	"git.cin.su/m/Assistant/contracts/world"
+)
+
+type Repository interface {
+	SaveKindDefinition(context.Context, world.WorldObjectKindDefinition) error
+	SaveObject(context.Context, world.WorldObject) error
+	SaveAlias(context.Context, world.WorldAlias) error
+	SaveFacetDefinition(context.Context, world.FacetDefinition) error
+	SaveRelationDefinition(context.Context, world.RelationDefinition) error
+	SaveResolution(context.Context, world.IdentityResolutionDecisionRecord) error
+	SaveLineage(context.Context, world.WorldLineage) error
+}

platform/clock/instant.go

@@ -0,0 +1,14 @@
+package clock
+
+import "time"
+
+// Instant is a UTC point represented as Unix milliseconds.
+type Instant int64
+
+func (i Instant) Valid() bool { return i > 0 }
+
+func NowInstant() Instant { return FromTime(time.Now().UTC()) }
+
+func FromTime(value time.Time) Instant { return Instant(value.UTC().UnixMilli()) }
+
+func (i Instant) Time() time.Time { return time.UnixMilli(int64(i)).UTC() }

platform/clock/instant_test.go

@@ -0,0 +1,14 @@
+package clock
+
+import (
+	"testing"
+	"time"
+)
+
+func TestInstantRoundTripUsesUTCUnixMilliseconds(t *testing.T) {
+	want := time.Date(2026, time.August, 29, 12, 34, 56, 789000000, time.FixedZone("local", 3*60*60))
+	got := FromTime(want).Time()
+	if !got.Equal(want.UTC()) || got.Location() != time.UTC {
+		t.Fatalf("instant round trip = %v, want %v UTC", got, want.UTC())
+	}
+}

platform/ids/ids.go

@@ -6,14 +6,43 @@ import (
 	"fmt"
 )
 
-// ID is a transport-neutral opaque identifier primitive. Domain packages wrap it
-// in strong semantic ID types; do not pass bare ID across semantic boundaries.
-type ID string
+// StableID is a transport-neutral opaque identifier primitive. Domain packages
+// wrap it in strong semantic ID types; do not pass bare StableID across
+// semantic boundaries.
+type StableID string
 
-func New() (ID, error) {
+// ID is retained as a compatibility name for the V1 primitive.
+type ID = StableID
+
+// Revision is the optimistic version of a versioned semantic record.
+type Revision uint64
+
+const InitialRevision Revision = 1
+
+func (r Revision) Valid() bool { return r >= InitialRevision }
+
+// SemanticRef is a technical cross-owner reference envelope. It identifies a
+// record but does not grant storage ownership or provide generic CRUD.
+type SemanticRef struct {
+	OwnerNamespace string
+	SemanticKind   string
+	StableID       StableID
+	Revision       *Revision
+}
+
+func (r SemanticRef) Valid() bool {
+	return r.OwnerNamespace != "" && r.SemanticKind != "" && r.StableID != "" &&
+		(r.Revision == nil || r.Revision.Valid())
+}
+
+func NewStableID() (StableID, error) {
 	var b [16]byte
 	if _, err := rand.Read(b[:]); err != nil {
 		return "", fmt.Errorf("generate id: %w", err)
 	}
-	return ID(hex.EncodeToString(b[:])), nil
+	return StableID(hex.EncodeToString(b[:])), nil
+}
+
+func New() (ID, error) {
+	return NewStableID()
 }

platform/ids/ids_test.go

@@ -0,0 +1,21 @@
+package ids
+
+import "testing"
+
+func TestNewStableIDIsOpaque128BitHex(t *testing.T) {
+	id, err := NewStableID()
+	if err != nil || len(id) != 32 {
+		t.Fatalf("NewStableID() = %q, %v", id, err)
+	}
+	if !(SemanticRef{OwnerNamespace: "world", SemanticKind: "object", StableID: id}.Valid()) {
+		t.Fatal("stable id was not accepted by semantic reference")
+	}
+}
+
+func TestSemanticRefRejectsInvalidRevision(t *testing.T) {
+	revision := Revision(0)
+	ref := SemanticRef{OwnerNamespace: "world", SemanticKind: "object", StableID: "id", Revision: &revision}
+	if ref.Valid() {
+		t.Fatal("semantic reference accepted invalid revision")
+	}
+}