feat: new classification type in dspy signature

package.json

@@ -60,7 +60,6 @@
     "prettier": "^3.2.5",
     "release-it": "^17.4.0",
     "standard-version": "^9.5.0",
-    "ts-pegjs": "^4.2.1",
     "tsx": "^4.7.1",
     "typedoc": "^0.26.3",
     "typedoc-plugin-frontmatter": "^1.0.0",

src/ax/dsp/datetime.ts

@@ -88,3 +88,9 @@ function _parseLLMFriendlyDateTime(dateTimeStr: string) {
   // Convert to UTC
   return date.utc().toDate();
 }
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+export const formatDateWithTimezone = (date: Readonly<Date>) => {
+  const momentDate = moment(date).utc();
+  return momentDate.format(`YYYY-MM-DD HH:mm:ss UTC`);
+};

src/ax/dsp/extract.ts

@@ -101,6 +101,13 @@ const convertValueToType = (field: Readonly<AxField>, val: string) => {
       return parseLLMFriendlyDate(field, val as string);
     case 'datetime':
       return parseLLMFriendlyDateTime(field, val as string);
+    case 'class':
+      if (field.type.classes && !field.type.classes.includes(val)) {
+        throw new Error(
+          `Invalid class '${val}', expected one of the following: ${field.type.classes.join(', ')}`
+        );
+      }
+      return val as string;
     default:
       return val as string; // Unknown type
   }
@@ -122,11 +129,8 @@ function validateAndParseFieldValue(
   field: Readonly<AxField>,
   fieldValue: string | undefined
 ): unknown {
-  if (
-    !fieldValue ||
-    fieldValue === '' ||
-    fieldValue.toLocaleLowerCase() === 'null'
-  ) {
+  const fv = fieldValue?.toLocaleLowerCase();
+  if (!fieldValue || !fv || fv === '' || fv === 'null' || fv === 'undefined') {
     if (field.isOptional) {
       return;
     }

src/ax/dsp/generate.test.ts

@@ -23,6 +23,7 @@ test('extractValues with no prefix and single output', (t) => {
 
 test('extractValues with json', (t) => {
   const sig = new AxSignature(`question -> answer : json`);
+
   const v1 = {};
   extractValues(sig, v1, 'Answer: ```json\n{"hello": "world"}\n```');
 

src/ax/dsp/index.ts

@@ -14,4 +14,9 @@ export type { AxAssertion, AxStreamingAssertion } from './asserts.js';
 export type { AxPromptTemplate, AxFieldTemplateFn } from './prompt.js';
 export type { AxInstanceRegistry } from './registry.js';
 export type { AxResponseHandlerArgs } from './generate.js';
-export type { ParsedField, ParsedIdentifier } from './parser.js';
+export type {
+  ParsedSignature,
+  InputParsedFieldList,
+  OutputParsedFieldList,
+  ParsedIdentifier
+} from './parser.js';