add matrix orchestrator rail and repo scaffolding

rails/orchestrator-matrix/protocol/event.schema.json

@@ -0,0 +1,64 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://mosaicstack.dev/schemas/orchestrator/event.schema.json",
+  "title": "Mosaic Orchestrator Event",
+  "type": "object",
+  "required": [
+    "event_id",
+    "event_type",
+    "task_id",
+    "status",
+    "timestamp",
+    "source"
+  ],
+  "properties": {
+    "event_id": {
+      "type": "string",
+      "description": "UUID string"
+    },
+    "event_type": {
+      "type": "string",
+      "enum": [
+        "task.assigned",
+        "task.started",
+        "task.progress",
+        "task.completed",
+        "task.failed",
+        "rail.check.started",
+        "rail.check.passed",
+        "rail.check.failed"
+      ]
+    },
+    "task_id": {
+      "type": "string"
+    },
+    "status": {
+      "type": "string",
+      "enum": [
+        "pending",
+        "running",
+        "completed",
+        "failed"
+      ]
+    },
+    "timestamp": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "source": {
+      "type": "string",
+      "enum": [
+        "controller",
+        "worker",
+        "quality-gate"
+      ]
+    },
+    "message": {
+      "type": "string"
+    },
+    "metadata": {
+      "type": "object"
+    }
+  },
+  "additionalProperties": true
+}

rails/orchestrator-matrix/protocol/task.schema.json

@@ -0,0 +1,49 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://mosaicstack.dev/schemas/orchestrator/task.schema.json",
+  "title": "Mosaic Orchestrator Task",
+  "type": "object",
+  "required": [
+    "id",
+    "title",
+    "status"
+  ],
+  "properties": {
+    "id": {
+      "type": "string"
+    },
+    "title": {
+      "type": "string"
+    },
+    "description": {
+      "type": "string"
+    },
+    "status": {
+      "type": "string",
+      "enum": [
+        "pending",
+        "running",
+        "completed",
+        "failed"
+      ]
+    },
+    "runtime": {
+      "type": "string",
+      "description": "Preferred worker runtime, e.g. codex, claude, opencode"
+    },
+    "command": {
+      "type": "string",
+      "description": "Worker command to execute for this task"
+    },
+    "quality_gates": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    },
+    "metadata": {
+      "type": "object"
+    }
+  },
+  "additionalProperties": true
+}