implements PLN-0002 journey runtime model

Assets/Scripts/Intrepid/Gameplay/Journey/JConnection.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace Intrepid.Gameplay.Journey
+{
+    [Serializable]
+    public sealed class JConnection
+    {
+        public string id;
+        public string endpointAId;
+        public string endpointBId;
+        public JConnectionDirectionality directionality = JConnectionDirectionality.Bidirectional;
+
+        public bool ContainsEndpoint(string endpointId)
+        {
+            return endpointAId == endpointId || endpointBId == endpointId;
+        }
+
+        public string GetOtherEndpointId(string endpointId)
+        {
+            if (endpointAId == endpointId)
+            {
+                return endpointBId;
+            }
+
+            if (endpointBId == endpointId)
+            {
+                return endpointAId;
+            }
+
+            return null;
+        }
+    }
+}

Assets/Scripts/Intrepid/Gameplay/Journey/JConnection.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9c1fd63a9fe84c8fb09bb9c2e804ec8e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Intrepid/Gameplay/Journey/JEndpoint.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace Intrepid.Gameplay.Journey
+{
+    [Serializable]
+    public sealed class JEndpoint
+    {
+        public string id;
+        public string stageId;
+        public JWorldTile worldTile;
+        public JEndpointKind kind;
+        public bool required;
+
+        // Used when kind is Socket. Ignored by Anchor and Lift endpoints.
+        public JSocketFace socketFace;
+
+        public bool IsSocket => kind == JEndpointKind.Socket;
+        public bool IsAnchor => kind == JEndpointKind.Anchor;
+        public bool IsLift => kind == JEndpointKind.Lift;
+    }
+}

Assets/Scripts/Intrepid/Gameplay/Journey/JEndpoint.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 71c2f06702924f18b413f79bb35f9af3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Intrepid/Gameplay/Journey/JGraphSO.cs

@@ -0,0 +1,102 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Intrepid.Gameplay.Journey
+{
+    [CreateAssetMenu(menuName = "GON/Journey/J Graph", fileName = "JGraph")]
+    public sealed class JGraphSO : ScriptableObject
+    {
+        public string sourceWorldLayoutId;
+        public string publishedAt;
+        public int schemaVersion = 1;
+        public string contentHash;
+
+        public List<JStage> stages = new();
+        public List<JEndpoint> endpoints = new();
+        public List<JConnection> connections = new();
+
+        public void EnsureDefaults()
+        {
+            stages ??= new List<JStage>();
+            endpoints ??= new List<JEndpoint>();
+            connections ??= new List<JConnection>();
+
+            foreach (var stage in stages)
+            {
+                stage?.EnsureDefaults();
+            }
+        }
+
+        public JStage FindStage(string stageId)
+        {
+            EnsureDefaults();
+            foreach (var stage in stages)
+            {
+                if (stage != null && stage.id == stageId)
+                {
+                    return stage;
+                }
+            }
+
+            return null;
+        }
+
+        public JEndpoint FindEndpoint(string endpointId)
+        {
+            EnsureDefaults();
+            foreach (var endpoint in endpoints)
+            {
+                if (endpoint != null && endpoint.id == endpointId)
+                {
+                    return endpoint;
+                }
+            }
+
+            return null;
+        }
+
+        public JConnection FindConnection(string connectionId)
+        {
+            EnsureDefaults();
+            foreach (var connection in connections)
+            {
+                if (connection != null && connection.id == connectionId)
+                {
+                    return connection;
+                }
+            }
+
+            return null;
+        }
+
+        public List<JEndpoint> GetEndpointsForStage(string stageId)
+        {
+            EnsureDefaults();
+            var result = new List<JEndpoint>();
+            foreach (var endpoint in endpoints)
+            {
+                if (endpoint != null && endpoint.stageId == stageId)
+                {
+                    result.Add(endpoint);
+                }
+            }
+
+            return result;
+        }
+
+        public List<JConnection> GetConnectionsForEndpoint(string endpointId)
+        {
+            EnsureDefaults();
+            var result = new List<JConnection>();
+            foreach (var connection in connections)
+            {
+                if (connection != null && connection.ContainsEndpoint(endpointId))
+                {
+                    result.Add(connection);
+                }
+            }
+
+            return result;
+        }
+    }
+}

Assets/Scripts/Intrepid/Gameplay/Journey/JGraphSO.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: fcb661d795ed4088af4ae73e4253f98b
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Intrepid/Gameplay/Journey/JStage.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+
+namespace Intrepid.Gameplay.Journey
+{
+    [Serializable]
+    public sealed class JStage
+    {
+        public string id;
+        public string displayName;
+        public int worldLayer;
+        public List<JWorldTile> occupiedTiles = new();
+        public List<string> tags = new();
+
+        public void EnsureDefaults()
+        {
+            occupiedTiles ??= new List<JWorldTile>();
+            tags ??= new List<string>();
+        }
+    }
+}

Assets/Scripts/Intrepid/Gameplay/Journey/JStage.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 5dbe6985a3384e0190ac342eb49eb4d9
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Intrepid/Gameplay/Journey/JourneyTypes.cs

@@ -0,0 +1,39 @@
+using System;
+
+namespace Intrepid.Gameplay.Journey
+{
+    public enum JEndpointKind
+    {
+        Socket = 0,
+        Anchor = 1,
+        Lift = 2
+    }
+
+    public enum JSocketFace
+    {
+        North = 0,
+        South = 1,
+        East = 2,
+        West = 3
+    }
+
+    public enum JConnectionDirectionality
+    {
+        Bidirectional = 0,
+        AToB = 1,
+        BToA = 2
+    }
+
+    [Serializable]
+    public struct JWorldTile
+    {
+        public int x;
+        public int y;
+
+        public JWorldTile(int x, int y)
+        {
+            this.x = x;
+            this.y = y;
+        }
+    }
+}

Assets/Scripts/Intrepid/Gameplay/Journey/JourneyTypes.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 6fd7e60621d443e3a2f02fbb9ffcc801
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

discussion/index.ndjson

@@ -1,2 +1,2 @@
 {"type":"meta","next_id":{"DSC":2,"AGD":2,"DEC":2,"PLN":5,"LSN":1,"CLSN":1}}
-{"type":"discussion","id":"DSC-0001","status":"accepted","ticket":"world-editor-journey-spec","title":"World Editor / Journey Spec","created_at":"2026-06-19","updated_at":"2026-06-19","tags":["world-editor","journey","stage-contract","architecture"],"agendas":[{"id":"AGD-0001","file":"AGD-0001-world-editor-journey-spec.md","status":"accepted","created_at":"2026-06-19","updated_at":"2026-06-19"}],"decisions":[{"id":"DEC-0001","file":"DEC-0001-world-editor-journey-v1.md","status":"accepted","created_at":"2026-06-19","updated_at":"2026-06-19","ref_agenda":"AGD-0001"}],"plans":[{"id":"PLN-0001","file":"PLN-0001-world-journey-spec.md","status":"done","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]},{"id":"PLN-0002","file":"PLN-0002-journey-runtime-model.md","status":"review","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]},{"id":"PLN-0003","file":"PLN-0003-world-editor-authoring.md","status":"review","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]},{"id":"PLN-0004","file":"PLN-0004-journey-commit-validation.md","status":"review","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]}],"lessons":[]}
+{"type":"discussion","id":"DSC-0001","status":"accepted","ticket":"world-editor-journey-spec","title":"World Editor / Journey Spec","created_at":"2026-06-19","updated_at":"2026-06-19","tags":["world-editor","journey","stage-contract","architecture"],"agendas":[{"id":"AGD-0001","file":"AGD-0001-world-editor-journey-spec.md","status":"accepted","created_at":"2026-06-19","updated_at":"2026-06-19"}],"decisions":[{"id":"DEC-0001","file":"DEC-0001-world-editor-journey-v1.md","status":"accepted","created_at":"2026-06-19","updated_at":"2026-06-19","ref_agenda":"AGD-0001"}],"plans":[{"id":"PLN-0001","file":"PLN-0001-world-journey-spec.md","status":"done","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]},{"id":"PLN-0002","file":"PLN-0002-journey-runtime-model.md","status":"done","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]},{"id":"PLN-0003","file":"PLN-0003-world-editor-authoring.md","status":"review","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]},{"id":"PLN-0004","file":"PLN-0004-journey-commit-validation.md","status":"review","created_at":"2026-06-19","updated_at":"2026-06-19","ref_decisions":["DEC-0001"]}],"lessons":[]}

discussion/workflow/plans/PLN-0002-journey-runtime-model.md

@@ -2,7 +2,7 @@
 id: PLN-0002
 ticket: world-editor-journey-spec
 title: Journey Runtime Model
-status: review
+status: done
 created: 2026-06-19
 decisions:
   - DEC-0001