feat: Phase 7 - Waypoint Support

- Add get_folder_waypoint tool to extract waypoint blocks from folder notes
- Add is_folder_note tool to detect folder notes by basename or waypoint markers
- Implement waypoint edit protection in update_note to prevent corruption
- Create waypoint-utils.ts with helper functions for waypoint operations
- Add FolderWaypointResult and FolderNoteResult types
- Update ROADMAP.md and CHANGELOG.md with Phase 7 completion
- All manual tests passing

src/tools/index.ts

@@ -256,6 +256,34 @@ export class ToolRegistry {
 					},
 					required: ["path"]
 				}
+			},
+			{
+				name: "get_folder_waypoint",
+				description: "Get Waypoint block from a folder note. Waypoint blocks (%% Begin Waypoint %% ... %% End Waypoint %%) are auto-generated by the Waypoint plugin to create folder indexes. Returns structured JSON with waypoint presence, line range, extracted wikilinks, and raw content. Use this to inspect folder note navigation structures without parsing the entire file.",
+				inputSchema: {
+					type: "object",
+					properties: {
+						path: {
+							type: "string",
+							description: "Vault-relative path to the folder note (e.g., 'projects/projects.md' or 'daily/daily.md'). Paths are case-sensitive on macOS/Linux. Do not use leading or trailing slashes."
+						}
+					},
+					required: ["path"]
+				}
+			},
+			{
+				name: "is_folder_note",
+				description: "Check if a note is a folder note. A folder note is identified by either having the same basename as its parent folder OR containing Waypoint markers. Returns structured JSON with boolean result, detection reason (basename_match, waypoint_marker, both, or none), and folder path. Use this to identify navigation/index notes in your vault structure.",
+				inputSchema: {
+					type: "object",
+					properties: {
+						path: {
+							type: "string",
+							description: "Vault-relative path to the note to check (e.g., 'projects/projects.md'). Paths are case-sensitive on macOS/Linux. Do not use leading or trailing slashes."
+						}
+					},
+					required: ["path"]
+				}
 			}
 		];
 	}
@@ -311,6 +339,10 @@ export class ToolRegistry {
 						includeCompressed: args.includeCompressed,
 						includePreview: args.includePreview
 					});
+				case "get_folder_waypoint":
+					return await this.vaultTools.getFolderWaypoint(args.path);
+				case "is_folder_note":
+					return await this.vaultTools.isFolderNote(args.path);
 				default:
 					return {
 						content: [{ type: "text", text: `Unknown tool: ${name}` }],