Add Wave contract schemas for pipeline validation

JSON Schema definitions for all pipeline handover contracts
including issue analysis, research, enhancement, and sync flows.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.wave/contracts/connections.schema.json

@@ -0,0 +1,96 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "Connections",
+  "description": "Mapping of new content to existing Zettelkasten notes and addresses",
+  "type": "object",
+  "required": ["source_title", "related_notes", "suggested_placements"],
+  "properties": {
+    "source_title": {
+      "type": "string",
+      "description": "Title of the source being connected"
+    },
+    "related_notes": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["filename", "title", "folgezettel_address", "relationship"],
+        "properties": {
+          "filename": {
+            "type": "string",
+            "pattern": "^[0-9a-f]{8}\\.md$",
+            "description": "Hex-ID filename of the related note"
+          },
+          "title": {
+            "type": "string",
+            "description": "Full title of the related note"
+          },
+          "folgezettel_address": {
+            "type": "string",
+            "description": "Folgezettel address of the related note"
+          },
+          "relationship": {
+            "type": "string",
+            "description": "Why this note is related to the source"
+          },
+          "link_direction": {
+            "type": "string",
+            "enum": ["from_new", "to_new", "bidirectional"],
+            "description": "Whether the new note should link to this, or this should link to new"
+          }
+        }
+      },
+      "description": "Existing notes related to the source content"
+    },
+    "suggested_placements": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": ["folgezettel_address", "parent_note", "section", "rationale"],
+        "properties": {
+          "folgezettel_address": {
+            "type": "string",
+            "description": "Suggested Folgezettel address for a new note"
+          },
+          "parent_note": {
+            "type": "string",
+            "description": "Filename of the parent note in the Folgezettel sequence"
+          },
+          "section": {
+            "type": "string",
+            "description": "Top-level section name"
+          },
+          "rationale": {
+            "type": "string",
+            "description": "Why this placement makes sense"
+          },
+          "concept": {
+            "type": "string",
+            "description": "Which concept from the source this placement is for"
+          }
+        }
+      },
+      "description": "Suggested positions in the Folgezettel for new notes"
+    },
+    "index_update_needed": {
+      "type": "boolean",
+      "description": "Whether the index note should be updated"
+    },
+    "suggested_index_entries": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["keyword", "rationale"],
+        "properties": {
+          "keyword": { "type": "string" },
+          "rationale": { "type": "string" }
+        }
+      },
+      "description": "Suggested new entries for the index note"
+    },
+    "timestamp": {
+      "type": "string",
+      "format": "date-time"
+    }
+  }
+}