diff --git a/src/index.html b/src/index.html
index 7fcc2ec..1ab5f83 100644
--- a/src/index.html
+++ b/src/index.html
@@ -266,8 +266,9 @@
               action: () => alert("Custom button action"),
             },
           ]),
-          spellcheckOpts: { dict: "en_US", dictionaryPath: `${window.location.pathname}dictionaries` },
+          // spellcheckOpts: { dict: "en_US", dictionaryPath: `${window.location.pathname}dictionaries` },
           syncScroll: true,
+          yamlSchema: `${window.location.origin}${window.location.pathname.split("/").slice(0, -1).join("/")}/project.json`,
         },
         document.getElementById("myst"),
       );
diff --git a/src/public/project.json b/src/public/project.json
new file mode 100644
index 0000000..10c9e40
--- /dev/null
+++ b/src/public/project.json
@@ -0,0 +1,139 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://designer.antmicro.com/project.schema.json",
+  "title": "Project",
+  "description": "Project definition for System Designer",
+  "type": "object",
+  "properties": {
+    "description": {
+      "description": "Project description",
+      "type": "string"
+    },
+    "company": {
+      "description": "The project's customer",
+      "type": "string"
+    },
+    "docs": {
+      "description": "Project documentation URL",
+      "type": "string",
+      "format": "uri"
+    },
+    "research": {
+      "description": "Is this a research project",
+      "type": "boolean"
+    },
+    "devices": {
+      "description": "Devices in this project",
+      "type": "object",
+      "patternProperties": {
+        "^.*$": {
+          "anyOf": [
+            {
+              "type": "object",
+              "properties": {
+                "type": {
+                  "description": "Device type",
+                  "type": "string"
+                },
+                "contains": {
+                  "description": "Other devices contained in this one",
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
+                "description": {
+                  "description": "Device description",
+                  "type": "string"
+                },
+                "soc": {
+                  "description": "Soc contained in device",
+                  "type": "string"
+                },
+                "hw_repo": {
+                  "description": "Git repository for device",
+                  "type": "string",
+                  "format": "uri"
+                },
+                "image": {
+                  "description": "Device image",
+                  "type": "string",
+                  "format": "uri"
+                }
+              },
+              "additionalProperties": false
+            },
+            {
+              "type": "string"
+            }
+          ]
+        }
+      }
+    },
+    "software": {
+      "description": "Software in this project",
+      "type": "object",
+      "patternProperties": {
+        "^.*$": {
+          "type": "object",
+          "properties": {
+            "what": {
+              "description": "Software type (determines icon, defaults to 'other')",
+              "type": "string",
+              "enum": ["kenning", "linux", "openroad", "other", "rdfm", "renode", "u-boot", "xls", "zephyr"]
+            },
+            "description": {
+              "description": "Device description",
+              "type": "string"
+            },
+            "repos": {
+              "description": "Repositories for this software",
+              "type": "object",
+              "patternProperties": {
+                "^.*$": {
+                  "type": "string"
+                }
+              }
+            },
+            "repo": {
+              "description": "Repository for this software",
+              "type": "string"
+            },
+            "targets": {
+              "description": "Devices this software targets",
+              "type": "string"
+            }
+          },
+          "additionalProperties": false
+        }
+      }
+    },
+    "requirements": {
+      "description": "Project requirements",
+      "type": "object",
+      "patternProperties": {
+        "^.*$": {
+          "type": "string"
+        }
+      }
+    },
+    "allocations": {
+      "description": "Project allocations",
+      "type": "object",
+      "patternProperties": {
+        "^SoW_[0-9]+$": {
+          "type": "object",
+          "patternProperties": {
+            "^[0-9]{4}-w[0-9]{2}$": {
+              "type": "string"
+            }
+          },
+          "additionalProperties": false
+        }
+      },
+      "additionalProperties": false
+    }
+  },
+  "additionalProperties": false,
+  "required": ["description", "company"]
+}