🌐 Add cross-repo index system (Tier 1)

.blackroad/workflow-index-schema.json

@@ -0,0 +1,69 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "required": ["id", "repo", "title", "state", "timestamp"],
+  "properties": {
+    "id": {
+      "type": "string",
+      "pattern": "^(WF|SEC|INF|EXP|FIX)-\\d{8}-[A-Z]{3}-\\d{4}$",
+      "description": "Workflow ID in format: PREFIX-YYYYMMDD-SCOPE-SEQ"
+    },
+    "repo": {
+      "type": "string",
+      "pattern": "^[a-zA-Z0-9-]+/[a-zA-Z0-9-_]+$",
+      "description": "Repository in format: owner/repo"
+    },
+    "title": {
+      "type": "string",
+      "minLength": 1,
+      "description": "Human-readable workflow title"
+    },
+    "state": {
+      "type": "string",
+      "enum": ["Active", "Paused", "Speculative", "Archived", "Done", "Merged"],
+      "description": "Workflow state (posture, not progress)"
+    },
+    "scope": {
+      "type": "string",
+      "enum": ["Local", "Service", "System", "Public", "Experimental"],
+      "description": "Blast radius of changes"
+    },
+    "risk": {
+      "type": "string",
+      "enum": ["Unknown", "Low", "Medium", "High", "Critical"],
+      "description": "Risk level"
+    },
+    "intent": {
+      "type": "string",
+      "enum": ["Build", "Fix", "Explore", "Research", "Deploy", "Monitor", "Deprecate", "Migrate"],
+      "description": "Why this workflow exists"
+    },
+    "traffic_light": {
+      "type": "string",
+      "enum": ["🟢", "🟡", "🔴"],
+      "description": "Coordination status"
+    },
+    "deps": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      },
+      "description": "Array of dependency IDs (local or cross-repo format)"
+    },
+    "url": {
+      "type": "string",
+      "format": "uri",
+      "description": "GitHub issue/PR URL"
+    },
+    "timestamp": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Creation timestamp"
+    },
+    "updated_at": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Last update timestamp"
+    }
+  }
+}