diff --git a/src/symbols.ts b/src/symbols.ts
new file mode 100644
index 0000000..fe79739
--- /dev/null
+++ b/src/symbols.ts
@@ -0,0 +1,53 @@
+export interface Symbols {
+    definitions: ClueSymbolDefinition[];
+    uses: ClueSymbolUse[];
+    diagnostics: ClueDiagnostic[];
+}
+
+export interface ClueDiagnostic {
+    level: ClueDiagnosticLevel;
+    message: string;
+    location: Range;
+}
+
+export type ClueDiagnosticLevel =
+| 'WARNING'
+| 'ERROR';
+
+export interface ClueSymbolDefinition {
+    id: number;
+    token: string;
+    value: string | null;
+    location: Range;
+    kind: ClueSymbolKind;
+    modifiers: ClueSymbolModifier[];
+}
+
+export interface ClueSymbolUse {
+    definitionId: number | null;
+    location: Range;
+}
+
+export type ClueSymbolKind =
+| 'VARIABLE'
+| 'FUNCTION'
+| 'PSEUDO'
+| 'ENUM'
+| 'CONSTANT'
+| 'MACRO'
+| 'ARGUMENT';
+
+export type ClueSymbolModifier =
+| 'LOCAL'
+| 'GLOBAL'
+| 'STATIC';
+
+export interface Range {
+    start: Position;
+    end: Position;
+}
+
+export interface Position {
+    line: number;
+    character: number;
+}