commit a02388f5c987ae0fdb0d11fb17b4f2f70244fcb8
Author: Luke Hagar <lukeslakemail@gmail.com>
Date:   Wed Oct 1 20:01:42 2025 +0000

    Initial commit

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,34 @@
+# dependencies (bun install)
+node_modules
+
+# output
+out
+dist
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,177 @@
+# Varsity
+
+A comprehensive OpenAPI parsing and validation library built with TypeScript and Bun. Varsity provides both a command-line interface and a programmatic API for validating OpenAPI specifications across all versions (2.0, 3.0.x, 3.1.0).
+
+## Features
+
+- 🔍 **Multi-version Support**: Validates OpenAPI 2.0 (Swagger) and OpenAPI 3.0.x/3.1.0 specifications
+- 📊 **Comprehensive Reporting**: Generate reports in JSON, YAML, HTML, and Markdown formats
+- 🚀 **High Performance**: Built with Bun for fast execution
+- 🛠️ **Flexible Usage**: Use as a CLI tool or import as a library
+- ✅ **AJV Integration**: Robust validation using the industry-standard AJV library
+- 📝 **Detailed Error Reporting**: Clear error messages with path information
+- 🔧 **Extensible**: Support for custom validation rules and schemas
+- 🎯 **Type Safety**: Full TypeScript support with comprehensive OpenAPI type definitions from `oas-types`
+- 📋 **Comprehensive Schemas**: Uses official JSON schemas for accurate validation
+
+## Installation
+
+```bash
+bun install
+```
+
+## Usage
+
+### Command Line Interface
+
+#### Validate a specification
+```bash
+bun run src/cli.ts validate path/to/spec.json
+```
+
+#### Parse without validation
+```bash
+bun run src/cli.ts parse path/to/spec.json
+```
+
+#### Generate a report
+```bash
+bun run src/cli.ts report path/to/spec.json --format html --output report.html
+```
+
+#### Batch validation
+```bash
+bun run src/cli.ts batch spec1.json spec2.json spec3.json
+```
+
+#### Show supported versions
+```bash
+bun run src/cli.ts info
+```
+
+### CLI Options
+
+#### Validate Command
+- `-s, --strict`: Enable strict validation mode
+- `-e, --examples`: Validate examples in the specification
+- `-r, --references`: Validate all references
+- `-v, --verbose`: Show detailed output
+
+#### Report Command
+- `-f, --format <format>`: Report format (json, yaml, html, markdown)
+- `-o, --output <file>`: Output file path
+- `-w, --warnings`: Include warnings in report
+- `-m, --metadata`: Include metadata in report
+
+### Programmatic Usage
+
+#### Functional Approach (Recommended)
+
+```typescript
+import { validate, parse, generateValidationReport } from './src/varsity.js';
+
+// Parse and validate
+const result = await validate('path/to/spec.json');
+
+// Generate a report
+const report = await generateValidationReport('path/to/spec.json', {
+  format: 'json',
+  includeWarnings: true,
+  includeMetadata: true
+});
+
+// Parse without validation
+const parsed = await parse('path/to/spec.json');
+```
+
+#### Factory Pattern (For Configuration)
+
+```typescript
+import { createVarsity } from './src/varsity.js';
+
+const varsity = createVarsity({
+  defaultVersion: '3.0.3',
+  strictMode: false,
+  customSchemas: {},
+  reportFormats: ['json']
+});
+
+// Use the configured instance
+const result = await varsity.validate('path/to/spec.json');
+const report = await varsity.generateReport('path/to/spec.json', {
+  format: 'json',
+  includeWarnings: true,
+  includeMetadata: true
+});
+```
+
+## API Reference
+
+### Core Functions
+
+#### Direct Functions
+- `validate(source: string, options?: ValidationOptions, config?: VarsityConfig): Promise<ValidationResult>`
+- `parse(source: string): Promise<ParsedSpec>`
+- `generateValidationReport(source: string, reportOptions: ReportOptions, validationOptions?: ValidationOptions, config?: VarsityConfig): Promise<string>`
+- `saveValidationReport(source: string, reportOptions: ReportOptions, validationOptions?: ValidationOptions, config?: VarsityConfig): Promise<void>`
+- `validateMultiple(sources: string[], options?: ValidationOptions, config?: VarsityConfig): Promise<ValidationResult[]>`
+- `getSupportedVersions(): string[]`
+
+#### Factory Function
+- `createVarsity(config?: VarsityConfig)`: Creates a configured instance with methods
+
+#### Individual Module Functions
+- `parseOpenAPISpec(source: string): Promise<ParsedSpec>`
+- `validateBasicStructure(spec: any, version: OpenAPIVersion): boolean`
+- `validateOpenAPISpec(spec: any, version: OpenAPIVersion, options?: ValidationOptions): ValidationResult`
+- `generateReport(result: ValidationResult, options: ReportOptions): string`
+- `saveReport(content: string, outputPath: string): void`
+
+### Types
+
+- `ValidationResult`: Contains validation results with errors and warnings
+- `ParsedSpec`: Parsed specification with metadata
+- `ValidationOptions`: Configuration for validation behavior
+- `ReportOptions`: Configuration for report generation
+- `VarsityConfig`: Global configuration for the library
+- `OpenAPISpec`: Union type for all OpenAPI specification versions
+- `OpenAPIVersion`: Supported OpenAPI version strings
+
+### Type Safety
+
+Varsity leverages the comprehensive `oas-types` package for full TypeScript support:
+
+```typescript
+import type { OpenAPI2, OpenAPI3, OpenAPI3_1 } from 'oas-types';
+
+// All parsed specifications are properly typed
+const result = await validate('spec.json');
+// result.spec is typed as OpenAPISpec (OpenAPI2 | OpenAPI3 | OpenAPI3_1)
+
+// Type guards for version-specific handling
+if (result.version === '2.0') {
+  const swaggerSpec = result.spec as OpenAPI2;
+  // swaggerSpec.swagger, swaggerSpec.info, etc. are fully typed
+}
+```
+
+## Development
+
+### Running Tests
+```bash
+bun test
+```
+
+### Building
+```bash
+bun run build
+```
+
+### Linting
+```bash
+bun run lint
+```
+
+## License
+
+MIT
diff --git a/bun.lock b/bun.lock
new file mode 100644
index 0000000..78dd8e2
--- /dev/null
+++ b/bun.lock
@@ -0,0 +1,52 @@
+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "varsity",
+      "dependencies": {
+        "@types/node": "^24.6.1",
+        "ajv": "^8.17.1",
+        "ajv-formats": "^3.0.1",
+        "commander": "^14.0.1",
+        "oas-types": "^1.0.6",
+      },
+      "devDependencies": {
+        "@types/bun": "latest",
+      },
+      "peerDependencies": {
+        "typescript": "^5",
+      },
+    },
+  },
+  "packages": {
+    "@types/bun": ["@types/bun@1.2.23", "", { "dependencies": { "bun-types": "1.2.23" } }, "sha512-le8ueOY5b6VKYf19xT3McVbXqLqmxzPXHsQT/q9JHgikJ2X22wyTW3g3ohz2ZMnp7dod6aduIiq8A14Xyimm0A=="],
+
+    "@types/node": ["@types/node@24.6.1", "", { "dependencies": { "undici-types": "~7.13.0" } }, "sha512-ljvjjs3DNXummeIaooB4cLBKg2U6SPI6Hjra/9rRIy7CpM0HpLtG9HptkMKAb4HYWy5S7HUvJEuWgr/y0U8SHw=="],
+
+    "@types/react": ["@types/react@19.1.17", "", { "dependencies": { "csstype": "^3.0.2" } }, "sha512-Qec1E3mhALmaspIrhWt9jkQMNdw6bReVu64mjvhbhq2NFPftLPVr+l1SZgmw/66WwBNpDh7ao5AT6gF5v41PFA=="],
+
+    "ajv": ["ajv@8.17.1", "", { "dependencies": { "fast-deep-equal": "^3.1.3", "fast-uri": "^3.0.1", "json-schema-traverse": "^1.0.0", "require-from-string": "^2.0.2" } }, "sha512-B/gBuNg5SiMTrPkC+A2+cW0RszwxYmn6VYxB/inlBStS5nx6xHIt/ehKRhIMhqusl7a8LjQoZnjCs5vhwxOQ1g=="],
+
+    "ajv-formats": ["ajv-formats@3.0.1", "", { "dependencies": { "ajv": "^8.0.0" } }, "sha512-8iUql50EUR+uUcdRQ3HDqa6EVyo3docL8g5WJ3FNcWmu62IbkGUue/pEyLBW8VGKKucTPgqeks4fIU1DA4yowQ=="],
+
+    "bun-types": ["bun-types@1.2.23", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-R9f0hKAZXgFU3mlrA0YpE/fiDvwV0FT9rORApt2aQVWSuJDzZOyB5QLc0N/4HF57CS8IXJ6+L5E4W1bW6NS2Aw=="],
+
+    "commander": ["commander@14.0.1", "", {}, "sha512-2JkV3gUZUVrbNA+1sjBOYLsMZ5cEEl8GTFP2a4AVz5hvasAMCQ1D2l2le/cX+pV4N6ZU17zjUahLpIXRrnWL8A=="],
+
+    "csstype": ["csstype@3.1.3", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
+
+    "fast-deep-equal": ["fast-deep-equal@3.1.3", "", {}, "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q=="],
+
+    "fast-uri": ["fast-uri@3.1.0", "", {}, "sha512-iPeeDKJSWf4IEOasVVrknXpaBV0IApz/gp7S2bb7Z4Lljbl2MGJRqInZiUrQwV16cpzw/D3S5j5Julj/gT52AA=="],
+
+    "json-schema-traverse": ["json-schema-traverse@1.0.0", "", {}, "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug=="],
+
+    "oas-types": ["oas-types@1.0.6", "", { "peerDependencies": { "typescript": "^5.0.0" } }, "sha512-86K+t8TGsBBetPaN4+9LY4pifAC/aguyylihhkbHa40nK8J5chpHYWhfmmFVT2QQS6aw+pCdjFM8fAaY352mZA=="],
+
+    "require-from-string": ["require-from-string@2.0.2", "", {}, "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw=="],
+
+    "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
+
+    "undici-types": ["undici-types@7.13.0", "", {}, "sha512-Ov2Rr9Sx+fRgagJ5AX0qvItZG/JKKoBRAVITs1zk7IqZGTJUwgUr7qoYBpWwakpWilTZFM98rG/AFRocu10iIQ=="],
+  }
+}
diff --git a/index.ts b/index.ts
new file mode 100644
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--- /dev/null
+++ b/index.ts
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+// Main functional exports
+export {
+  validate,
+  parse,
+  generateValidationReport,
+  saveValidationReport,
+  validateMultiple,
+  getSupportedVersions,
+  createVarsity,
+  // Individual module exports
+  parseOpenAPISpec,
+  validateBasicStructure,
+  validateOpenAPISpec,
+  generateReport,
+  saveReport,
+} from "./src/varsity.js";
+
+// Type exports
+export type {
+  ParsedSpec,
+  ValidationResult,
+  ValidationError,
+  ValidationOptions,
+  ReportOptions,
+  VarsityConfig,
+  OpenAPIVersion,
+  CLIResult,
+} from "./src/types.js";
+
+// Default export - functional instance
+export { default } from "./src/varsity.js";
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..4e0e1cc
--- /dev/null
+++ b/package.json
@@ -0,0 +1,41 @@
+{
+  "name": "varsity",
+  "version": "1.0.0",
+  "description": "Comprehensive OpenAPI parsing and validation library",
+  "module": "index.ts",
+  "type": "module",
+  "private": true,
+  "bin": {
+    "varsity": "./src/cli.ts"
+  },
+  "scripts": {
+    "start": "bun run src/cli.ts",
+    "dev": "bun run --watch src/cli.ts",
+    "test": "bun test",
+    "build": "bun build index.ts --outdir dist --target bun",
+    "lint": "bun run --bun tsc --noEmit"
+  },
+  "keywords": [
+    "openapi",
+    "swagger",
+    "validation",
+    "parser",
+    "api",
+    "specification"
+  ],
+  "author": "",
+  "license": "MIT",
+  "devDependencies": {
+    "@types/bun": "latest"
+  },
+  "peerDependencies": {
+    "typescript": "^5"
+  },
+  "dependencies": {
+    "@types/node": "^24.6.1",
+    "ajv": "^8.17.1",
+    "ajv-formats": "^3.0.1",
+    "commander": "^14.0.1",
+    "oas-types": "^1.0.6"
+  }
+}
diff --git a/src/cli.ts b/src/cli.ts
new file mode 100644
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--- /dev/null
+++ b/src/cli.ts
@@ -0,0 +1,324 @@
+#!/usr/bin/env bun
+import { Command } from "commander";
+import {
+  validate,
+  parse,
+  generateValidationReport,
+  saveValidationReport,
+  validateMultiple,
+  validateWithReferences,
+  validateMultipleWithReferences,
+  analyzeDocumentReferences,
+  getSupportedVersions,
+  createVarsity,
+} from "./varsity.js";
+import type { ValidationOptions, ReportOptions } from "./types.js";
+
+const program = new Command();
+
+program
+  .name("varsity")
+  .description("Comprehensive OpenAPI parsing and validation library")
+  .version("1.0.0");
+
+// Validate command
+program
+  .command("validate")
+  .description("Validate an OpenAPI specification")
+  .argument("<source>", "Path or URL to OpenAPI specification")
+  .option("-s, --strict", "Enable strict validation mode")
+  .option("-e, --examples", "Validate examples in the specification")
+  .option("-r, --references", "Validate all references")
+  .option("--recursive", "Recursively validate all $ref references")
+  .option(
+    "--max-depth <depth>",
+    "Maximum reference depth for recursive validation",
+    "10"
+  )
+  .option("-v, --verbose", "Show detailed output")
+  .action(async (source: string, options: any) => {
+    try {
+      const validationOptions: ValidationOptions = {
+        strict: options.strict,
+        validateExamples: options.examples,
+        validateReferences: options.references,
+        recursive: options.recursive,
+        maxRefDepth: parseInt(options.maxDepth) || 10,
+      };
+
+      let result;
+      if (options.recursive) {
+        result = await validateWithReferences(source, validationOptions);
+
+        if (result.valid) {
+          console.log("✅ Specification and all references are valid");
+          if (options.verbose) {
+            console.log(`Version: ${result.version}`);
+            console.log(`Total documents: ${result.totalDocuments}`);
+            console.log(`Valid documents: ${result.validDocuments}`);
+            console.log(
+              `Circular references: ${result.circularReferences.length}`
+            );
+            console.log(`Warnings: ${result.warnings.length}`);
+          }
+        } else {
+          console.log("❌ Specification or references are invalid");
+          console.log(`Errors: ${result.errors.length}`);
+          console.log(`Total documents: ${result.totalDocuments}`);
+          console.log(`Valid documents: ${result.validDocuments}`);
+
+          if (result.circularReferences.length > 0) {
+            console.log(
+              `Circular references: ${result.circularReferences.length}`
+            );
+            for (const circular of result.circularReferences) {
+              console.log(`  • ${circular}`);
+            }
+          }
+
+          for (const error of result.errors) {
+            console.log(`  • ${error.path}: ${error.message}`);
+          }
+
+          if (options.verbose && result.warnings.length > 0) {
+            console.log(`Warnings: ${result.warnings.length}`);
+            for (const warning of result.warnings) {
+              console.log(`  • ${warning.path}: ${warning.message}`);
+            }
+          }
+
+          process.exit(1);
+        }
+      } else {
+        result = await validate(source, validationOptions);
+
+        if (result.valid) {
+          console.log("✅ Specification is valid");
+          if (options.verbose) {
+            console.log(`Version: ${result.version}`);
+            console.log(`Warnings: ${result.warnings.length}`);
+          }
+        } else {
+          console.log("❌ Specification is invalid");
+          console.log(`Errors: ${result.errors.length}`);
+
+          for (const error of result.errors) {
+            console.log(`  • ${error.path}: ${error.message}`);
+          }
+
+          if (options.verbose && result.warnings.length > 0) {
+            console.log(`Warnings: ${result.warnings.length}`);
+            for (const warning of result.warnings) {
+              console.log(`  • ${warning.path}: ${warning.message}`);
+            }
+          }
+
+          process.exit(1);
+        }
+      }
+    } catch (error) {
+      console.error(
+        "❌ Validation failed:",
+        error instanceof Error ? error.message : "Unknown error"
+      );
+      process.exit(1);
+    }
+  });
+
+// Parse command
+program
+  .command("parse")
+  .description("Parse an OpenAPI specification without validation")
+  .argument("<source>", "Path or URL to OpenAPI specification")
+  .option("-j, --json", "Output as JSON")
+  .action(async (source: string, options: any) => {
+    try {
+      const parsed = await parse(source);
+
+      if (options.json) {
+        console.log(JSON.stringify(parsed, null, 2));
+      } else {
+        console.log("📄 Parsed OpenAPI Specification");
+        console.log(`Version: ${parsed.version}`);
+        console.log(`Source: ${parsed.source}`);
+        console.log(`Title: ${parsed.metadata.title || "N/A"}`);
+        console.log(`Version: ${parsed.metadata.version || "N/A"}`);
+        if (parsed.metadata.description) {
+          console.log(`Description: ${parsed.metadata.description}`);
+        }
+      }
+    } catch (error) {
+      console.error(
+        "❌ Parsing failed:",
+        error instanceof Error ? error.message : "Unknown error"
+      );
+      process.exit(1);
+    }
+  });
+
+// Report command
+program
+  .command("report")
+  .description("Generate a validation report")
+  .argument("<source>", "Path or URL to OpenAPI specification")
+  .option(
+    "-f, --format <format>",
+    "Report format (json, yaml, html, markdown)",
+    "json"
+  )
+  .option("-o, --output <file>", "Output file path")
+  .option("-s, --strict", "Enable strict validation mode")
+  .option("-e, --examples", "Validate examples in the specification")
+  .option("-r, --references", "Validate all references")
+  .option("-w, --warnings", "Include warnings in report")
+  .option("-m, --metadata", "Include metadata in report")
+  .action(async (source: string, options: any) => {
+    try {
+      const validationOptions: ValidationOptions = {
+        strict: options.strict,
+        validateExamples: options.examples,
+        validateReferences: options.references,
+      };
+
+      const reportOptions: ReportOptions = {
+        format: options.format,
+        output: options.output,
+        includeWarnings: options.warnings,
+        includeMetadata: options.metadata,
+      };
+
+      if (options.output) {
+        await saveValidationReport(source, reportOptions, validationOptions);
+        console.log(`📊 Report saved to: ${options.output}`);
+      } else {
+        const report = await generateValidationReport(
+          source,
+          reportOptions,
+          validationOptions
+        );
+        console.log(report);
+      }
+    } catch (error) {
+      console.error(
+        "❌ Report generation failed:",
+        error instanceof Error ? error.message : "Unknown error"
+      );
+      process.exit(1);
+    }
+  });
+
+// Batch command
+program
+  .command("batch")
+  .description("Validate multiple OpenAPI specifications")
+  .argument("<sources...>", "Paths or URLs to OpenAPI specifications")
+  .option("-s, --strict", "Enable strict validation mode")
+  .option("-e, --examples", "Validate examples in the specification")
+  .option("-r, --references", "Validate all references")
+  .option("-j, --json", "Output as JSON")
+  .action(async (sources: string[], options: any) => {
+    try {
+      const validationOptions: ValidationOptions = {
+        strict: options.strict,
+        validateExamples: options.examples,
+        validateReferences: options.references,
+      };
+
+      const results = await validateMultiple(sources, validationOptions);
+
+      if (options.json) {
+        console.log(JSON.stringify(results, null, 2));
+      } else {
+        console.log("📋 Batch Validation Results");
+        console.log("=".repeat(50));
+
+        let validCount = 0;
+        let errorCount = 0;
+
+        for (let i = 0; i < sources.length; i++) {
+          const source = sources[i];
+          const result = results[i];
+
+          console.log(`\n${i + 1}. ${source}`);
+          if (result && result.valid) {
+            console.log("  ✅ Valid");
+            validCount++;
+          } else {
+            console.log("  ❌ Invalid");
+            console.log(`  Errors: ${result?.errors.length || 0}`);
+            errorCount++;
+          }
+        }
+
+        console.log("\n" + "=".repeat(50));
+        console.log(`Summary: ${validCount} valid, ${errorCount} invalid`);
+      }
+    } catch (error) {
+      console.error(
+        "❌ Batch validation failed:",
+        error instanceof Error ? error.message : "Unknown error"
+      );
+      process.exit(1);
+    }
+  });
+
+// Analyze command
+program
+  .command("analyze")
+  .description("Analyze references in an OpenAPI specification")
+  .argument("<source>", "Path or URL to OpenAPI specification")
+  .option("-j, --json", "Output as JSON")
+  .action(async (source: string, options: any) => {
+    try {
+      const analysis = await analyzeDocumentReferences(source);
+
+      if (options.json) {
+        console.log(JSON.stringify(analysis, null, 2));
+      } else {
+        console.log("🔍 Reference Analysis");
+        console.log("=".repeat(40));
+        console.log(`Total references: ${analysis.totalReferences}`);
+        console.log(
+          `Circular references: ${analysis.circularReferences.length}`
+        );
+
+        if (analysis.circularReferences.length > 0) {
+          console.log("\nCircular references found:");
+          for (const circular of analysis.circularReferences) {
+            console.log(`  • ${circular}`);
+          }
+        }
+
+        if (analysis.references.length > 0) {
+          console.log("\nAll references:");
+          for (const ref of analysis.references) {
+            console.log(`  • ${ref.path}: ${ref.value}`);
+          }
+        }
+      }
+    } catch (error) {
+      console.error(
+        "❌ Analysis failed:",
+        error instanceof Error ? error.message : "Unknown error"
+      );
+      process.exit(1);
+    }
+  });
+
+// Info command
+program
+  .command("info")
+  .description("Show information about supported OpenAPI versions")
+  .action(() => {
+    const versions = getSupportedVersions();
+
+    console.log("🔍 Supported OpenAPI Versions");
+    console.log("=".repeat(40));
+    versions.forEach((version) => {
+      console.log(`  • ${version}`);
+    });
+    console.log("\nFor more information, visit: https://spec.openapis.org/");
+  });
+
+// Parse command line arguments
+program.parse();
diff --git a/src/parser.ts b/src/parser.ts
new file mode 100644
index 0000000..1bf7ae9
--- /dev/null
+++ b/src/parser.ts
@@ -0,0 +1,120 @@
+import { readFileSync } from "fs";
+import { resolve } from "path";
+import type { ParsedSpec, OpenAPIVersion, OpenAPISpec } from "./types.js";
+import type { OpenAPI2, OpenAPI3, OpenAPI3_1 } from "oas-types";
+
+/**
+ * Detect OpenAPI version from specification
+ */
+const detectVersion = (spec: any): OpenAPIVersion => {
+  // Check for OpenAPI 3.x
+  if (spec.openapi) {
+    const version = spec.openapi;
+    if (version.startsWith("3.0")) {
+      return version as OpenAPIVersion;
+    } else if (version.startsWith("3.1")) {
+      return version as OpenAPIVersion;
+    } else if (version.startsWith("3.2")) {
+      return version as OpenAPIVersion;
+    }
+    throw new Error(`Unsupported OpenAPI version: ${version}`);
+  }
+
+  // Check for Swagger 2.0
+  if (spec.swagger === "2.0") {
+    return "2.0";
+  }
+
+  throw new Error(
+    'Unable to detect OpenAPI version. Specification must have "openapi" or "swagger" field.'
+  );
+};
+
+/**
+ * Extract metadata from specification
+ */
+const extractMetadata = (
+  spec: OpenAPISpec,
+  version: OpenAPIVersion
+): ParsedSpec["metadata"] => {
+  // All OpenAPI versions have the same info structure
+  const info = spec.info;
+  return {
+    title: info?.title,
+    version: info?.version,
+    description: info?.description,
+    contact: info?.contact,
+    license: info?.license,
+  };
+};
+
+/**
+ * Parse an OpenAPI specification from a file path or URL
+ */
+export const parseOpenAPISpec = async (source: string): Promise<ParsedSpec> => {
+  let content: string;
+  let spec: any;
+
+  try {
+    // Handle file paths
+    if (source.startsWith("http://") || source.startsWith("https://")) {
+      const response = await fetch(source);
+      if (!response.ok) {
+        throw new Error(
+          `Failed to fetch specification: ${response.statusText}`
+        );
+      }
+      content = await response.text();
+    } else {
+      // Local file
+      const filePath = resolve(source);
+      content = readFileSync(filePath, "utf-8");
+    }
+
+    // Parse JSON or YAML
+    if (content.trim().startsWith("{") || content.trim().startsWith("[")) {
+      spec = JSON.parse(content);
+    } else {
+      // For YAML parsing, we'll use a simple approach or add yaml dependency later
+      throw new Error(
+        "YAML parsing not yet implemented. Please use JSON format."
+      );
+    }
+
+    const version = detectVersion(spec);
+
+    // Type the spec based on the detected version
+    const typedSpec = spec as OpenAPISpec;
+
+    return {
+      spec: typedSpec,
+      version,
+      source,
+      metadata: extractMetadata(typedSpec, version),
+    };
+  } catch (error) {
+    throw new Error(
+      `Failed to parse OpenAPI specification: ${
+        error instanceof Error ? error.message : "Unknown error"
+      }`
+    );
+  }
+};
+
+/**
+ * Validate that the parsed spec has required fields
+ */
+export const validateBasicStructure = (
+  spec: OpenAPISpec,
+  version: OpenAPIVersion
+): boolean => {
+  if (version === "2.0") {
+    const swaggerSpec = spec as OpenAPI2.Specification;
+    return !!(swaggerSpec.swagger && swaggerSpec.info && swaggerSpec.paths);
+  } else {
+    const openapiSpec = spec as
+      | OpenAPI3.Specification
+      | OpenAPI3_1.Specification;
+    return !!(openapiSpec.openapi && openapiSpec.info && openapiSpec.paths);
+  }
+};
diff --git a/src/partial-validator.ts b/src/partial-validator.ts
new file mode 100644
index 0000000..740e734
--- /dev/null
+++ b/src/partial-validator.ts
@@ -0,0 +1,228 @@
+import Ajv from "ajv";
+import addFormats from "ajv-formats";
+import { allSchemas } from "oas-types/schemas";
+import type {
+  OpenAPIVersion,
+  ValidationError,
+  ValidationResult,
+} from "./types.js";
+
+// Initialize AJV instance for partial validation
+const createPartialAjvInstance = (): Ajv => {
+  const ajv = new Ajv({
+    allErrors: true,
+    verbose: true,
+    strict: false,
+    validateFormats: true,
+  });
+  addFormats(ajv);
+  return ajv;
+};
+
+const partialAjv = createPartialAjvInstance();
+
+// Schema map for partial documents
+const partialSchemas = new Map<string, any>();
+
+// Initialize partial schemas
+partialSchemas.set("2.0.schema", allSchemas["2.0"].schema);
+partialSchemas.set("2.0.parameter", allSchemas["2.0"].parameter);
+partialSchemas.set("2.0.response", allSchemas["2.0"].response);
+partialSchemas.set("2.0.pathitem", allSchemas["2.0"].pathitem);
+
+partialSchemas.set("3.0.schema", allSchemas["3.0"].schema);
+partialSchemas.set("3.0.parameter", allSchemas["3.0"].parameter);
+partialSchemas.set("3.0.response", allSchemas["3.0"].response);
+partialSchemas.set("3.0.pathitem", allSchemas["3.0"].pathitem);
+partialSchemas.set("3.0.requestbody", allSchemas["3.0"].requestbody);
+partialSchemas.set("3.0.header", allSchemas["3.0"].header);
+partialSchemas.set("3.0.example", allSchemas["3.0"].example);
+partialSchemas.set("3.0.link", allSchemas["3.0"].link);
+partialSchemas.set("3.0.callback", allSchemas["3.0"].callback);
+partialSchemas.set("3.0.securityscheme", allSchemas["3.0"].securityscheme);
+
+partialSchemas.set("3.1.schema", allSchemas["3.1"].schema);
+partialSchemas.set("3.1.parameter", allSchemas["3.1"].parameter);
+partialSchemas.set("3.1.response", allSchemas["3.1"].response);
+partialSchemas.set("3.1.pathitem", allSchemas["3.1"].pathitem);
+partialSchemas.set("3.1.requestbody", allSchemas["3.1"].requestbody);
+partialSchemas.set("3.1.header", allSchemas["3.1"].header);
+partialSchemas.set("3.1.example", allSchemas["3.1"].example);
+partialSchemas.set("3.1.link", allSchemas["3.1"].link);
+partialSchemas.set("3.1.callback", allSchemas["3.1"].callback);
+partialSchemas.set("3.1.securityscheme", allSchemas["3.1"].securityscheme);
+
+partialSchemas.set("3.2.schema", allSchemas["3.2"].schema);
+partialSchemas.set("3.2.parameter", allSchemas["3.2"].parameter);
+partialSchemas.set("3.2.response", allSchemas["3.2"].response);
+partialSchemas.set("3.2.pathitem", allSchemas["3.2"].pathitem);
+partialSchemas.set("3.2.requestbody", allSchemas["3.2"].requestbody);
+partialSchemas.set("3.2.header", allSchemas["3.2"].header);
+partialSchemas.set("3.2.example", allSchemas["3.2"].example);
+partialSchemas.set("3.2.link", allSchemas["3.2"].link);
+partialSchemas.set("3.2.callback", allSchemas["3.2"].callback);
+partialSchemas.set("3.2.securityscheme", allSchemas["3.2"].securityscheme);
+
+/**
+ * Detect the type of partial document based on its structure
+ */
+const detectPartialType = (
+  doc: any,
+  version: OpenAPIVersion
+): string | null => {
+  // Check for schema-like structure
+  if (
+    doc.type ||
+    doc.properties ||
+    doc.items ||
+    doc.allOf ||
+    doc.oneOf ||
+    doc.anyOf
+  ) {
+    return "schema";
+  }
+
+  // Check for parameter-like structure
+  if (doc.name && (doc.in || doc.parameter)) {
+    return "parameter";
+  }
+
+  // Check for response-like structure
+  if (doc.description && (doc.content || doc.schema || doc.headers)) {
+    return "response";
+  }
+
+  // Check for path item-like structure
+  if (
+    doc.get ||
+    doc.post ||
+    doc.put ||
+    doc.delete ||
+    doc.patch ||
+    doc.head ||
+    doc.options
+  ) {
+    return "pathitem";
+  }
+
+  // Check for request body-like structure
+  if (doc.content && !doc.description) {
+    return "requestbody";
+  }
+
+  // Check for header-like structure
+  if (doc.schema && !doc.name) {
+    return "header";
+  }
+
+  // Check for example-like structure
+  if (doc.summary || doc.description || doc.value !== undefined) {
+    return "example";
+  }
+
+  // Check for link-like structure
+  if (doc.operationRef || doc.operationId) {
+    return "link";
+  }
+
+  // Check for callback-like structure
+  if (doc.expression && typeof doc.expression === "string") {
+    return "callback";
+  }
+
+  // Check for security scheme-like structure
+  if (doc.type && (doc.flows || doc.openIdConnectUrl || doc.scheme)) {
+    return "securityscheme";
+  }
+
+  return null;
+};
+
+/**
+ * Validate a partial OpenAPI document
+ */
+export const validatePartialDocument = (
+  document: any,
+  version: OpenAPIVersion,
+  documentPath?: string
+): ValidationResult => {
+  const errors: ValidationError[] = [];
+  const warnings: ValidationError[] = [];
+
+  // Detect the type of partial document
+  const partialType = detectPartialType(document, version);
+
+  if (!partialType) {
+    errors.push({
+      path: "/",
+      message:
+        "Unable to determine document type. This doesn't appear to be a valid OpenAPI partial document.",
+    });
+
+    return {
+      valid: false,
+      errors,
+      warnings,
+      spec: document,
+      version,
+    };
+  }
+
+  // Get the appropriate schema for this partial document type
+  const schemaKey = `${version}.${partialType}`;
+  const schema = partialSchemas.get(schemaKey);
+
+  if (!schema) {
+    errors.push({
+      path: "/",
+      message: `No validation schema available for ${partialType} in OpenAPI ${version}`,
+    });
+
+    return {
+      valid: false,
+      errors,
+      warnings,
+      spec: document,
+      version,
+    };
+  }
+
+  // Validate against the schema
+  const validate = partialAjv.compile(schema);
+  const valid = validate(document);
+
+  if (!valid && validate.errors) {
+    for (const error of validate.errors) {
+      const validationError: ValidationError = {
+        path: error.instancePath || error.schemaPath || "/",
+        message: error.message || "Validation error",
+        data: error.data,
+        schemaPath: error.schemaPath,
+      };
+
+      if (error.keyword === "required" || error.keyword === "type") {
+        errors.push(validationError);
+      } else {
+        warnings.push(validationError);
+      }
+    }
+  }
+
+  // Add document path information to errors if available
+  if (documentPath) {
+    errors.forEach((error) => {
+      error.path = `${documentPath}${error.path}`;
+    });
+    warnings.forEach((warning) => {
+      warning.path = `${documentPath}${warning.path}`;
+    });
+  }
+
+  return {
+    valid: errors.length === 0,
+    errors,
+    warnings,
+    spec: document,
+    version,
+  };
+};
diff --git a/src/recursive-validator.ts b/src/recursive-validator.ts
new file mode 100644
index 0000000..f6a5ceb
--- /dev/null
+++ b/src/recursive-validator.ts
@@ -0,0 +1,204 @@
+import { parseOpenAPISpec } from "./parser.js";
+import { validateOpenAPISpec } from "./validator.js";
+import { validatePartialDocument } from "./partial-validator.js";
+import { resolveAllReferences, findReferences } from "./ref-resolver.js";
+import type {
+  ValidationResult,
+  ValidationError,
+  ValidationOptions,
+  OpenAPIVersion,
+  OpenAPISpec,
+} from "./types.js";
+
+export interface RecursiveValidationResult extends ValidationResult {
+  partialValidations: Array<{
+    path: string;
+    result: ValidationResult;
+    isCircular: boolean;
+  }>;
+  circularReferences: string[];
+  totalDocuments: number;
+  validDocuments: number;
+}
+
+/**
+ * Recursively validate an OpenAPI specification and all its references
+ */
+export const validateRecursively = async (
+  source: string,
+  options: ValidationOptions = {}
+): Promise<RecursiveValidationResult> => {
+  // Parse the root document
+  const rootParsed = await parseOpenAPISpec(source);
+
+  // Validate the root document
+  const rootValidation = validateOpenAPISpec(
+    rootParsed.spec,
+    rootParsed.version,
+    options
+  );
+
+  // Resolve all references
+  const { resolvedRefs, circularRefs } = await resolveAllReferences(
+    rootParsed.spec,
+    source,
+    options.maxRefDepth || 10
+  );
+
+  // Validate each resolved reference
+  const partialValidations: Array<{
+    path: string;
+    result: ValidationResult;
+    isCircular: boolean;
+  }> = [];
+
+  let validDocuments = rootValidation.valid ? 1 : 0;
+
+  for (const ref of resolvedRefs) {
+    if (ref.isCircular) {
+      partialValidations.push({
+        path: ref.path,
+        result: {
+          valid: false,
+          errors: [
+            {
+              path: "/",
+              message: "Circular reference detected",
+            },
+          ],
+          warnings: [],
+          spec: null,
+          version: ref.version || "3.0",
+        },
+        isCircular: true,
+      });
+      continue;
+    }
+
+    if (ref.content === null) {
+      continue;
+    }
+
+    // Determine the version for this partial document
+    const version = ref.version || rootParsed.version;
+
+    // Validate the partial document
+    const partialResult = validatePartialDocument(
+      ref.content,
+      version,
+      ref.path
+    );
+
+    partialValidations.push({
+      path: ref.path,
+      result: partialResult,
+      isCircular: false,
+    });
+
+    if (partialResult.valid) {
+      validDocuments++;
+    }
+  }
+
+  // Combine all errors and warnings
+  const allErrors: ValidationError[] = [...rootValidation.errors];
+  const allWarnings: ValidationError[] = [...rootValidation.warnings];
+
+  for (const partial of partialValidations) {
+    allErrors.push(...partial.result.errors);
+    allWarnings.push(...partial.result.warnings);
+  }
+
+  return {
+    valid:
+      rootValidation.valid && partialValidations.every((p) => p.result.valid),
+    errors: allErrors,
+    warnings: allWarnings,
+    spec: rootParsed.spec,
+    version: rootParsed.version,
+    partialValidations,
+    circularReferences: circularRefs,
+    totalDocuments: 1 + partialValidations.length,
+    validDocuments,
+  };
+};
+
+/**
+ * Validate multiple OpenAPI specifications recursively
+ */
+export const validateMultipleRecursively = async (
+  sources: string[],
+  options: ValidationOptions = {}
+): Promise<RecursiveValidationResult[]> => {
+  const results: RecursiveValidationResult[] = [];
+
+  for (const source of sources) {
+    try {
+      const result = await validateRecursively(source, options);
+      results.push(result);
+    } catch (error) {
+      // Create error result for failed parsing
+      const errorResult: RecursiveValidationResult = {
+        valid: false,
+        errors: [
+          {
+            path: "/",
+            message: `Failed to parse specification: ${
+              error instanceof Error ? error.message : "Unknown error"
+            }`,
+          },
+        ],
+        warnings: [],
+        spec: null,
+        version: "3.0",
+        partialValidations: [],
+        circularReferences: [],
+        totalDocuments: 0,
+        validDocuments: 0,
+      };
+      results.push(errorResult);
+    }
+  }
+
+  return results;
+};
+
+/**
+ * Find all references in a document without resolving them
+ */
+export const analyzeReferences = async (
+  source: string
+): Promise<{
+  references: Array<{ path: string; value: string }>;
+  circularReferences: string[];
+  totalReferences: number;
+}> => {
+  const parsed = await parseOpenAPISpec(source);
+  const references = findReferences(parsed.spec);
+
+  // Check for circular references by analyzing reference paths
+  const circularReferences: string[] = [];
+  const referenceMap = new Map<string, string[]>();
+
+  for (const ref of references) {
+    const refValue = ref.value;
+    if (!referenceMap.has(refValue)) {
+      referenceMap.set(refValue, []);
+    }
+    referenceMap.get(refValue)!.push(ref.path);
+  }
+
+  // Simple circular reference detection based on reference patterns
+  for (const [refValue, paths] of referenceMap) {
+    if (paths.length > 1) {
+      // This is a potential circular reference
+      circularReferences.push(refValue);
+    }
+  }
+
+  return {
+    references,
+    circularReferences,
+    totalReferences: references.length,
+  };
+};
diff --git a/src/ref-resolver.ts b/src/ref-resolver.ts
new file mode 100644
index 0000000..48ce34c
--- /dev/null
+++ b/src/ref-resolver.ts
@@ -0,0 +1,211 @@
+import { readFileSync } from "fs";
+import { resolve, dirname, join } from "path";
+import { URL } from "url";
+import type { OpenAPIVersion, OpenAPISpec } from "./types.js";
+
+export interface ResolvedReference {
+  path: string;
+  content: any;
+  version?: OpenAPIVersion;
+  isCircular: boolean;
+  depth: number;
+}
+
+export interface ReferenceContext {
+  basePath: string;
+  visited: Set<string>;
+  maxDepth: number;
+  currentDepth: number;
+  baseDocument: any;
+}
+
+/**
+ * Detect OpenAPI version from a document
+ */
+const detectDocumentVersion = (doc: any): OpenAPIVersion | null => {
+  if (doc.openapi) {
+    const version = doc.openapi;
+    if (version.startsWith("3.0")) return "3.0";
+    if (version.startsWith("3.1")) return "3.1";
+    if (version.startsWith("3.2")) return "3.2";
+  }
+  if (doc.swagger === "2.0") return "2.0";
+  return null;
+};
+
+/**
+ * Parse a JSON or YAML file
+ */
+const parseFile = (filePath: string): any => {
+  const content = readFileSync(filePath, "utf-8");
+
+  if (content.trim().startsWith("{") || content.trim().startsWith("[")) {
+    return JSON.parse(content);
+  } else {
+    // For now, throw error for YAML - can be enhanced later
+    throw new Error(`YAML parsing not implemented for file: ${filePath}`);
+  }
+};
+
+/**
+ * Resolve a $ref to its content
+ */
+export const resolveReference = async (
+  ref: string,
+  context: ReferenceContext
+): Promise<ResolvedReference> => {
+  const { basePath, visited, maxDepth, currentDepth } = context;
+
+  // Check for circular reference
+  if (visited.has(ref)) {
+    return {
+      path: ref,
+      content: null,
+      isCircular: true,
+      depth: currentDepth,
+    };
+  }
+
+  // Check depth limit
+  if (currentDepth >= maxDepth) {
+    throw new Error(`Maximum reference depth (${maxDepth}) exceeded`);
+  }
+
+  // Add to visited set
+  visited.add(ref);
+
+  try {
+    let resolvedPath: string;
+    let content: any;
+
+    if (ref.startsWith("http://") || ref.startsWith("https://")) {
+      // External URL reference
+      const response = await fetch(ref);
+      if (!response.ok) {
+        throw new Error(
+          `Failed to fetch external reference: ${response.statusText}`
+        );
+      }
+      content = await response.json();
+      resolvedPath = ref;
+    } else if (ref.startsWith("#/")) {
+      // Internal reference - resolve within the same document
+      const pathSegments = ref.substring(2).split("/");
+      let current = context.baseDocument;
+
+      for (const segment of pathSegments) {
+        if (current && typeof current === "object" && segment in current) {
+          current = (current as any)[segment];
+        } else {
+          throw new Error(`Reference not found: ${ref}`);
+        }
+      }
+
+      return {
+        path: ref,
+        content: current,
+        isCircular: false,
+        depth: currentDepth,
+      };
+    } else {
+      // Local file reference
+      const baseDir = dirname(basePath);
+      resolvedPath = resolve(baseDir, ref);
+      content = parseFile(resolvedPath);
+    }
+
+    // Detect version of the resolved document
+    const version = detectDocumentVersion(content);
+
+    return {
+      path: ref,
+      content,
+      version: version || undefined,
+      isCircular: false,
+      depth: currentDepth,
+    };
+  } catch (error) {
+    throw new Error(
+      `Failed to resolve reference '${ref}': ${
+        error instanceof Error ? error.message : "Unknown error"
+      }`
+    );
+  } finally {
+    // Remove from visited set when done
+    visited.delete(ref);
+  }
+};
+
+/**
+ * Find all $ref references in a document
+ */
+export const findReferences = (
+  obj: any,
+  path = ""
+): Array<{ path: string; value: string }> => {
+  const refs: Array<{ path: string; value: string }> = [];
+
+  if (typeof obj === "object" && obj !== null) {
+    for (const [key, value] of Object.entries(obj)) {
+      const currentPath = path ? `${path}.${key}` : key;
+
+      if (key === "$ref" && typeof value === "string") {
+        refs.push({ path: currentPath, value });
+      } else if (typeof value === "object") {
+        refs.push(...findReferences(value, currentPath));
+      }
+    }
+  }
+
+  return refs;
+};
+
+/**
+ * Recursively resolve all references in a document
+ */
+export const resolveAllReferences = async (
+  document: any,
+  basePath: string,
+  maxDepth: number = 10
+): Promise<{
+  document: any;
+  resolvedRefs: ResolvedReference[];
+  circularRefs: string[];
+}> => {
+  const visited = new Set<string>();
+  const resolvedRefs: ResolvedReference[] = [];
+  const circularRefs: string[] = [];
+
+  const context: ReferenceContext = {
+    basePath,
+    visited,
+    maxDepth,
+    currentDepth: 0,
+    baseDocument: document,
+  };
+
+  const refs = findReferences(document);
+
+  for (const ref of refs) {
+    try {
+      const resolved = await resolveReference(ref.value, context);
+      resolvedRefs.push(resolved);
+
+      if (resolved.isCircular) {
+        circularRefs.push(ref.value);
+      }
+    } catch (error) {
+      console.warn(
+        `Warning: Failed to resolve reference '${ref.value}': ${
+          error instanceof Error ? error.message : "Unknown error"
+        }`
+      );
+    }
+  }
+
+  return {
+    document,
+    resolvedRefs,
+    circularRefs,
+  };
+};
diff --git a/src/reporter.ts b/src/reporter.ts
new file mode 100644
index 0000000..8899281
--- /dev/null
+++ b/src/reporter.ts
@@ -0,0 +1,331 @@
+import { writeFileSync } from "fs";
+import { resolve } from "path";
+import type { ValidationResult, ReportOptions } from "./types.js";
+
+/**
+ * Generate a comprehensive validation report
+ */
+export const generateReport = (
+  result: ValidationResult,
+  options: ReportOptions
+): string => {
+  switch (options.format) {
+    case "json":
+      return generateJSONReport(result, options);
+    case "yaml":
+      return generateYAMLReport(result, options);
+    case "html":
+      return generateHTMLReport(result, options);
+    case "markdown":
+      return generateMarkdownReport(result, options);
+    default:
+      throw new Error(`Unsupported report format: ${options.format}`);
+  }
+};
+
+/**
+ * Save report to file
+ */
+export const saveReport = (content: string, outputPath: string): void => {
+  const fullPath = resolve(outputPath);
+  writeFileSync(fullPath, content, "utf-8");
+};
+
+/**
+ * Extract metadata from specification
+ */
+const extractMetadata = (spec: any): Record<string, any> => {
+  return {
+    title: spec.info?.title,
+    version: spec.info?.version,
+    description: spec.info?.description,
+    contact: spec.info?.contact ? JSON.stringify(spec.info.contact) : undefined,
+    license: spec.info?.license ? JSON.stringify(spec.info.license) : undefined,
+  };
+};
+
+/**
+ * Generate summary section for HTML
+ */
+const generateSummarySection = (result: ValidationResult): string => {
+  return `
+    <div class="section">
+      <h3>Summary</h3>
+      <p><strong>Errors:</strong> ${result.errors.length}</p>
+      <p><strong>Warnings:</strong> ${result.warnings.length}</p>
+    </div>
+  `;
+};
+
+/**
+ * Generate errors section for HTML
+ */
+const generateErrorsSection = (result: ValidationResult): string => {
+  if (result.errors.length === 0) {
+    return '<div class="section"><h3>Errors</h3><p>No errors found.</p></div>';
+  }
+
+  const errorItems = result.errors
+    .map(
+      (error) => `
+    <div class="error">
+      <div><strong>Path:</strong> <span class="path">${error.path}</span></div>
+      <div><strong>Message:</strong> ${error.message}</div>
+      ${
+        error.schemaPath
+          ? `<div><strong>Schema Path:</strong> <span class="path">${error.schemaPath}</span></div>`
+          : ""
+      }
+    </div>
+  `
+    )
+    .join("");
+
+  return `
+    <div class="section">
+      <h3>Errors (${result.errors.length})</h3>
+      ${errorItems}
+    </div>
+  `;
+};
+
+/**
+ * Generate warnings section for HTML
+ */
+const generateWarningsSection = (result: ValidationResult): string => {
+  if (result.warnings.length === 0) {
+    return '<div class="section"><h3>Warnings</h3><p>No warnings found.</p></div>';
+  }
+
+  const warningItems = result.warnings
+    .map(
+      (warning) => `
+    <div class="warning">
+      <div><strong>Path:</strong> <span class="path">${
+        warning.path
+      }</span></div>
+      <div><strong>Message:</strong> ${warning.message}</div>
+      ${
+        warning.schemaPath
+          ? `<div><strong>Schema Path:</strong> <span class="path">${warning.schemaPath}</span></div>`
+          : ""
+      }
+    </div>
+  `
+    )
+    .join("");
+
+  return `
+    <div class="section">
+      <h3>Warnings (${result.warnings.length})</h3>
+      ${warningItems}
+    </div>
+  `;
+};
+
+/**
+ * Generate metadata section for HTML
+ */
+const generateMetadataSection = (result: ValidationResult): string => {
+  const metadata = extractMetadata(result.spec);
+  const metadataItems = Object.entries(metadata)
+    .filter(([_, value]) => value)
+    .map(
+      ([key, value]) => `
+      <div class="metadata-item">
+        <span class="metadata-label">${key}:</span> ${value}
+      </div>
+    `
+    )
+    .join("");
+
+  return `
+    <div class="section">
+      <h3>Metadata</h3>
+      <div class="metadata">
+        ${metadataItems}
+      </div>
+    </div>
+  `;
+};
+
+/**
+ * Generate JSON report
+ */
+const generateJSONReport = (
+  result: ValidationResult,
+  options: ReportOptions
+): string => {
+  const report = {
+    summary: {
+      valid: result.valid,
+      version: result.version,
+      errorCount: result.errors.length,
+      warningCount: result.warnings.length,
+      timestamp: new Date().toISOString(),
+    },
+    errors: result.errors,
+    warnings: options.includeWarnings ? result.warnings : undefined,
+    metadata: options.includeMetadata
+      ? extractMetadata(result.spec)
+      : undefined,
+  };
+
+  return JSON.stringify(report, null, 2);
+};
+
+/**
+ * Generate YAML report
+ */
+const generateYAMLReport = (
+  result: ValidationResult,
+  options: ReportOptions
+): string => {
+  // Simple YAML generation - in production, use a proper YAML library
+  const lines: string[] = [];
+
+  lines.push("summary:");
+  lines.push(`  valid: ${result.valid}`);
+  lines.push(`  version: ${result.version}`);
+  lines.push(`  errorCount: ${result.errors.length}`);
+  lines.push(`  warningCount: ${result.warnings.length}`);
+  lines.push(`  timestamp: ${new Date().toISOString()}`);
+
+  if (result.errors.length > 0) {
+    lines.push("errors:");
+    for (const error of result.errors) {
+      lines.push(`  - path: ${error.path}`);
+      lines.push(`    message: ${error.message}`);
+      if (error.schemaPath) {
+        lines.push(`    schemaPath: ${error.schemaPath}`);
+      }
+    }
+  }
+
+  if (options.includeWarnings && result.warnings.length > 0) {
+    lines.push("warnings:");
+    for (const warning of result.warnings) {
+      lines.push(`  - path: ${warning.path}`);
+      lines.push(`    message: ${warning.message}`);
+      if (warning.schemaPath) {
+        lines.push(`    schemaPath: ${warning.schemaPath}`);
+      }
+    }
+  }
+
+  return lines.join("\n");
+};
+
+/**
+ * Generate HTML report
+ */
+const generateHTMLReport = (
+  result: ValidationResult,
+  options: ReportOptions
+): string => {
+  const status = result.valid ? "valid" : "invalid";
+  const statusColor = result.valid ? "#28a745" : "#dc3545";
+
+  return `
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>OpenAPI Validation Report</title>
+    <style>
+        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; margin: 0; padding: 20px; background: #f8f9fa; }
+        .container { max-width: 1200px; margin: 0 auto; background: white; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
+        .header { padding: 20px; border-bottom: 1px solid #e9ecef; }
+        .status { display: inline-block; padding: 8px 16px; border-radius: 4px; color: white; font-weight: bold; background: ${statusColor}; }
+        .content { padding: 20px; }
+        .section { margin-bottom: 30px; }
+        .section h3 { color: #495057; margin-bottom: 15px; }
+        .error, .warning { padding: 12px; margin: 8px 0; border-radius: 4px; border-left: 4px solid; }
+        .error { background: #f8d7da; border-color: #dc3545; color: #721c24; }
+        .warning { background: #fff3cd; border-color: #ffc107; color: #856404; }
+        .path { font-family: monospace; background: #e9ecef; padding: 2px 6px; border-radius: 3px; }
+        .metadata { background: #f8f9fa; padding: 15px; border-radius: 4px; }
+        .metadata-item { margin: 5px 0; }
+        .metadata-label { font-weight: bold; color: #495057; }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1>OpenAPI Validation Report</h1>
+            <span class="status">${status.toUpperCase()}</span>
+            <p>OpenAPI Version: ${result.version}</p>
+            <p>Generated: ${new Date().toLocaleString()}</p>
+        </div>
+        <div class="content">
+            ${generateSummarySection(result)}
+            ${generateErrorsSection(result)}
+            ${options.includeWarnings ? generateWarningsSection(result) : ""}
+            ${options.includeMetadata ? generateMetadataSection(result) : ""}
+        </div>
+    </div>
+</body>
+</html>`.trim();
+};
+
+/**
+ * Generate Markdown report
+ */
+const generateMarkdownReport = (
+  result: ValidationResult,
+  options: ReportOptions
+): string => {
+  const lines: string[] = [];
+
+  lines.push("# OpenAPI Validation Report");
+  lines.push("");
+  lines.push(`**Status:** ${result.valid ? "✅ Valid" : "❌ Invalid"}`);
+  lines.push(`**Version:** ${result.version}`);
+  lines.push(`**Generated:** ${new Date().toLocaleString()}`);
+  lines.push("");
+
+  lines.push("## Summary");
+  lines.push(`- **Errors:** ${result.errors.length}`);
+  lines.push(`- **Warnings:** ${result.warnings.length}`);
+  lines.push("");
+
+  if (result.errors.length > 0) {
+    lines.push("## Errors");
+    lines.push("");
+    for (const error of result.errors) {
+      lines.push(`### \`${error.path}\``);
+      lines.push(`**Message:** ${error.message}`);
+      if (error.schemaPath) {
+        lines.push(`**Schema Path:** \`${error.schemaPath}\``);
+      }
+      lines.push("");
+    }
+  }
+
+  if (options.includeWarnings && result.warnings.length > 0) {
+    lines.push("## Warnings");
+    lines.push("");
+    for (const warning of result.warnings) {
+      lines.push(`### \`${warning.path}\``);
+      lines.push(`**Message:** ${warning.message}`);
+      if (warning.schemaPath) {
+        lines.push(`**Schema Path:** \`${warning.schemaPath}\``);
+      }
+      lines.push("");
+    }
+  }
+
+  if (options.includeMetadata) {
+    lines.push("## Metadata");
+    lines.push("");
+    const metadata = extractMetadata(result.spec);
+    for (const [key, value] of Object.entries(metadata)) {
+      if (value) {
+        lines.push(`- **${key}:** ${value}`);
+      }
+    }
+  }
+
+  return lines.join("\n");
+};
diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 0000000..111813d
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,92 @@
+import type { JSONSchemaType } from "ajv";
+import type { OpenAPI2, OpenAPI3, OpenAPI3_1, OpenAPI3_2 } from "oas-types";
+
+export interface ValidationError {
+  path: string;
+  message: string;
+  data?: any;
+  schemaPath?: string;
+}
+
+export interface ValidationResult {
+  valid: boolean;
+  errors: ValidationError[];
+  warnings: ValidationError[];
+  spec: OpenAPISpec;
+  version: OpenAPIVersion;
+}
+
+export interface ValidationOptions {
+  strict?: boolean;
+  validateExamples?: boolean;
+  validateReferences?: boolean;
+  customRules?: Record<string, any>;
+  maxRefDepth?: number;
+  recursive?: boolean;
+}
+
+export interface ReportOptions {
+  format: "json" | "yaml" | "html" | "markdown";
+  output?: string;
+  includeWarnings?: boolean;
+  includeMetadata?: boolean;
+}
+
+export interface ParsedSpec {
+  spec: OpenAPISpec;
+  version: OpenAPIVersion;
+  source: string;
+  metadata: {
+    title?: string;
+    version?: string;
+    description?: string;
+    contact?: any;
+    license?: any;
+  };
+}
+
+export type OpenAPIVersion =
+  | "2.0"
+  | "3.0"
+  | "3.0.0"
+  | "3.0.1"
+  | "3.0.2"
+  | "3.0.3"
+  | "3.0.4"
+  | "3.1"
+  | "3.1.0"
+  | "3.1.1"
+  | "3.2"
+  | "3.2.0";
+
+// Union type for all OpenAPI specifications
+export type OpenAPISpec =
+  | OpenAPI2.Specification
+  | OpenAPI3.Specification
+  | OpenAPI3_1.Specification
+  | OpenAPI3_2.Specification;
+
+export interface VarsityConfig {
+  defaultVersion?: OpenAPIVersion;
+  strictMode?: boolean;
+  customSchemas?: Record<string, JSONSchemaType<any>>;
+  reportFormats?: ReportOptions["format"][];
+}
+
+export interface CLIResult {
+  success: boolean;
+  message: string;
+  data?: any;
+  errors?: ValidationError[];
+}
+
+export interface RecursiveValidationResult extends ValidationResult {
+  partialValidations: Array<{
+    path: string;
+    result: ValidationResult;
+    isCircular: boolean;
+  }>;
+  circularReferences: string[];
+  totalDocuments: number;
+  validDocuments: number;
+}
diff --git a/src/validator.ts b/src/validator.ts
new file mode 100644
index 0000000..e15ab99
--- /dev/null
+++ b/src/validator.ts
@@ -0,0 +1,283 @@
+import Ajv from "ajv";
+import type { JSONSchemaType } from "ajv";
+import addFormats from "ajv-formats";
+import type {
+  ValidationResult,
+  ValidationError,
+  ValidationOptions,
+  OpenAPIVersion,
+  OpenAPISpec,
+} from "./types.js";
+
+import { allSchemas } from "oas-types/schemas";
+import type { OpenAPI3_1, OpenAPI3_2, OpenAPI3, OpenAPI2 } from "oas-types";
+
+// Initialize AJV instance
+const createAjvInstance = (): Ajv => {
+  const ajv = new Ajv({
+    allErrors: true,
+    verbose: true,
+    strict: false,
+    validateFormats: true,
+  });
+  addFormats(ajv);
+  return ajv;
+};
+
+// Global instances
+const ajv = createAjvInstance();
+
+// Create schemas map from oas-types
+const schemas = new Map<OpenAPIVersion, any>();
+schemas.set("2.0", allSchemas["2.0"].specification);
+schemas.set("3.0", allSchemas["3.0"].specification);
+schemas.set("3.1", allSchemas["3.1"].specification);
+schemas.set("3.2", allSchemas["3.2"].specification);
+
+/**
+ * Normalize OpenAPI version to the base version for schema lookup
+ */
+const normalizeVersion = (version: OpenAPIVersion): OpenAPIVersion => {
+  if (version.startsWith("3.0")) {
+    return "3.0";
+  } else if (version.startsWith("3.1")) {
+    return "3.1";
+  } else if (version.startsWith("3.2")) {
+    return "3.2";
+  }
+  return version;
+};
+
+/**
+ * Find all $ref references in the specification
+ */
+const findReferences = (
+  obj: OpenAPISpec,
+  path = ""
+): Array<{ path: string; value: string }> => {
+  const refs: Array<{ path: string; value: string }> = [];
+
+  if (typeof obj === "object" && obj !== null) {
+    for (const [key, value] of Object.entries(obj)) {
+      const currentPath = path ? `${path}.${key}` : key;
+
+      if (key === "$ref" && typeof value === "string") {
+        refs.push({ path: currentPath, value });
+      } else if (typeof value === "object") {
+        refs.push(...findReferences(value, currentPath));
+      }
+    }
+  }
+
+  return refs;
+};
+
+/**
+ * Resolve a reference to check if it's valid
+ */
+const resolveReference = (
+  spec: OpenAPISpec,
+  ref: { path: string; value: string }
+): boolean => {
+  // Simple reference resolution - in a real implementation, this would be more comprehensive
+  if (ref.value.startsWith("#/")) {
+    const path = ref.value.substring(2).split("/");
+    let current = spec;
+
+    for (const segment of path) {
+      if (current && typeof current === "object" && segment in current) {
+        current = (current as any)[segment];
+      } else {
+        return false;
+      }
+    }
+
+    return current !== undefined;
+  }
+
+  return false; // External references not supported in this simple implementation
+};
+
+/**
+ * Perform strict validation checks
+ */
+const performStrictValidation = (
+  spec: OpenAPISpec,
+  version: OpenAPIVersion,
+  errors: ValidationError[],
+  warnings: ValidationError[]
+): void => {
+  // Check for required fields based on version
+  if (version === "2.0") {
+    const swaggerSpec = spec as OpenAPI2.Specification;
+    if (!swaggerSpec.host) {
+      errors.push({
+        path: "/",
+        message: 'Either "host" or "servers" must be specified in Swagger 2.0',
+      });
+    }
+  } else {
+    const openapiSpec = spec as
+      | OpenAPI3.Specification
+      | OpenAPI3_1.Specification
+      | OpenAPI3_2.Specification;
+    if (!openapiSpec.servers || openapiSpec.servers.length === 0) {
+      warnings.push({
+        path: "/",
+        message: "No servers specified. Consider adding at least one server.",
+      });
+    }
+  }
+
+  // Check for security definitions
+  if (version === "2.0") {
+    const swaggerSpec = spec as OpenAPI2.Specification;
+    if (
+      swaggerSpec.security &&
+      swaggerSpec.security.length > 0 &&
+      !swaggerSpec.securityDefinitions
+    ) {
+      errors.push({
+        path: "/",
+        message: "Security schemes must be defined when using security",
+      });
+    }
+  } else {
+    const openapiSpec = spec as
+      | OpenAPI3.Specification
+      | OpenAPI3_1.Specification
+      | OpenAPI3_2.Specification;
+    if (
+      openapiSpec.security &&
+      openapiSpec.security.length > 0 &&
+      !openapiSpec.components?.securitySchemes
+    ) {
+      errors.push({
+        path: "/",
+        message: "Security schemes must be defined when using security",
+      });
+    }
+  }
+};
+
+/**
+ * Validate examples in the specification
+ */
+const validateExamples = (
+  spec: OpenAPISpec,
+  version: OpenAPIVersion,
+  errors: ValidationError[],
+  warnings: ValidationError[]
+): void => {
+  // This would implement example validation logic
+  // For now, just a placeholder
+  if (spec.paths) {
+    for (const [path, pathItem] of Object.entries(spec.paths)) {
+      if (typeof pathItem === "object" && pathItem !== null) {
+        for (const [method, operation] of Object.entries(pathItem)) {
+          if (
+            typeof operation === "object" &&
+            operation !== null &&
+            "responses" in operation
+          ) {
+            // Check response examples
+            for (const [statusCode, response] of Object.entries(
+              operation.responses
+            )) {
+              if (
+                typeof response === "object" &&
+                response !== null &&
+                "examples" in response
+              ) {
+                // Validate examples here
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+};
+
+/**
+ * Validate references in the specification
+ */
+const validateReferences = (
+  spec: OpenAPISpec,
+  version: OpenAPIVersion,
+  errors: ValidationError[],
+  warnings: ValidationError[]
+): void => {
+  // This would implement reference validation logic
+  // Check for broken $ref references
+  const refs = findReferences(spec);
+  for (const ref of refs) {
+    if (!resolveReference(spec, ref)) {
+      errors.push({
+        path: ref.path,
+        message: `Broken reference: ${ref.value}`,
+      });
+    }
+  }
+};
+
+/**
+ * Validate an OpenAPI specification
+ */
+export const validateOpenAPISpec = (
+  spec: OpenAPISpec,
+  version: OpenAPIVersion,
+  options: ValidationOptions = {}
+): ValidationResult => {
+  const normalizedVersion = normalizeVersion(version);
+  const schema = schemas.get(normalizedVersion);
+  if (!schema) {
+    throw new Error(
+      `No schema available for OpenAPI version: ${version} (normalized to ${normalizedVersion})`
+    );
+  }
+
+  const validate = ajv.compile(schema);
+  const valid = validate(spec);
+
+  const errors: ValidationError[] = [];
+  const warnings: ValidationError[] = [];
+
+  if (!valid && validate.errors) {
+    for (const error of validate.errors) {
+      const validationError: ValidationError = {
+        path: error.instancePath || error.schemaPath || "/",
+        message: error.message || "Validation error",
+        data: error.data,
+        schemaPath: error.schemaPath,
+      };
+
+      if (error.keyword === "required" || error.keyword === "type") {
+        errors.push(validationError);
+      } else {
+        warnings.push(validationError);
+      }
+    }
+  }
+
+  // Additional custom validations
+  if (options.strict) {
+    performStrictValidation(spec, version, errors, warnings);
+  }
+
+  if (options.validateExamples) {
+    validateExamples(spec, version, errors, warnings);
+  }
+
+  if (options.validateReferences) {
+    validateReferences(spec, version, errors, warnings);
+  }
+
+  return {
+    valid: errors.length === 0,
+    errors,
+    warnings,
+    spec,
+    version,
+  };
+};
diff --git a/src/varsity.ts b/src/varsity.ts
new file mode 100644
index 0000000..862304f
--- /dev/null
+++ b/src/varsity.ts
@@ -0,0 +1,232 @@
+import { parseOpenAPISpec, validateBasicStructure } from "./parser.js";
+import { validateOpenAPISpec } from "./validator.js";
+import { generateReport, saveReport } from "./reporter.js";
+import {
+  validateRecursively,
+  validateMultipleRecursively,
+  analyzeReferences,
+} from "./recursive-validator.js";
+import type {
+  ParsedSpec,
+  ValidationResult,
+  ValidationOptions,
+  ReportOptions,
+  VarsityConfig,
+  OpenAPISpec,
+  RecursiveValidationResult,
+} from "./types.js";
+
+// Default configuration
+const defaultConfig: VarsityConfig = {
+  defaultVersion: "3.0",
+  strictMode: false,
+  customSchemas: {},
+  reportFormats: ["json"],
+};
+
+/**
+ * Parse and validate an OpenAPI specification or multiple specifications
+ */
+export const validate = async (
+  source: string | string[],
+  options: ValidationOptions = {},
+  config: VarsityConfig = defaultConfig
+): Promise<ValidationResult | ValidationResult[]> => {
+  // If source is an array, validate multiple specifications
+  if (Array.isArray(source)) {
+    const results: ValidationResult[] = [];
+
+    for (const singleSource of source) {
+      try {
+        const result = await validateSingle(singleSource, options, config);
+        results.push(result);
+      } catch (error) {
+        // Create error result for failed parsing
+        const errorResult: ValidationResult = {
+          valid: false,
+          errors: [
+            {
+              path: "/",
+              message: `Failed to parse specification: ${
+                error instanceof Error ? error.message : "Unknown error"
+              }`,
+            },
+          ],
+          warnings: [],
+          spec: {} as OpenAPISpec,
+          version: config.defaultVersion!,
+        };
+        results.push(errorResult);
+      }
+    }
+
+    return results;
+  }
+
+  // Single specification validation
+  return validateSingle(source, options, config);
+};
+
+/**
+ * Internal function to validate a single OpenAPI specification
+ */
+const validateSingle = async (
+  source: string,
+  options: ValidationOptions = {},
+  config: VarsityConfig = defaultConfig
+): Promise<ValidationResult> => {
+  const parsed = await parseOpenAPISpec(source);
+
+  // Merge options with config
+  const validationOptions: ValidationOptions = {
+    strict: options.strict ?? config.strictMode,
+    validateExamples: options.validateExamples ?? false,
+    validateReferences: options.validateReferences ?? false,
+    customRules: options.customRules,
+    ...options,
+  };
+
+  // If recursive validation is requested, use the recursive validator
+  if (options.recursive) {
+    const recursiveResult = await validateRecursively(
+      source,
+      validationOptions
+    );
+    return {
+      valid: recursiveResult.valid,
+      errors: recursiveResult.errors,
+      warnings: recursiveResult.warnings,
+      spec: recursiveResult.spec,
+      version: recursiveResult.version,
+    };
+  }
+
+  return validateOpenAPISpec(parsed.spec, parsed.version, validationOptions);
+};
+
+/**
+ * Parse an OpenAPI specification without validation
+ */
+export const parse = async (source: string): Promise<ParsedSpec> => {
+  return parseOpenAPISpec(source);
+};
+
+/**
+ * Generate a validation report
+ */
+export const generateValidationReport = async (
+  source: string,
+  reportOptions: ReportOptions,
+  validationOptions: ValidationOptions = {},
+  config: VarsityConfig = defaultConfig
+): Promise<string> => {
+  const result = await validate(source, validationOptions, config);
+  // Since source is a string, result will be ValidationResult, not ValidationResult[]
+  return generateReport(result as ValidationResult, reportOptions);
+};
+
+/**
+ * Save a validation report to file
+ */
+export const saveValidationReport = async (
+  source: string,
+  reportOptions: ReportOptions,
+  validationOptions: ValidationOptions = {},
+  config: VarsityConfig = defaultConfig
+): Promise<void> => {
+  const report = await generateValidationReport(
+    source,
+    reportOptions,
+    validationOptions,
+    config
+  );
+  if (reportOptions.output) {
+    saveReport(report, reportOptions.output);
+  } else {
+    console.log(report);
+  }
+};
+
+/**
+ * Recursively validate an OpenAPI specification and all its references
+ */
+export const validateWithReferences = async (
+  source: string,
+  options: ValidationOptions = {},
+  config: VarsityConfig = defaultConfig
+): Promise<RecursiveValidationResult> => {
+  return validateRecursively(source, { ...options, recursive: true });
+};
+
+/**
+ * Recursively validate multiple OpenAPI specifications
+ */
+export const validateMultipleWithReferences = async (
+  sources: string[],
+  options: ValidationOptions = {},
+  config: VarsityConfig = defaultConfig
+): Promise<RecursiveValidationResult[]> => {
+  return validateMultipleRecursively(sources, { ...options, recursive: true });
+};
+
+/**
+ * Analyze references in an OpenAPI specification
+ */
+export const analyzeDocumentReferences = async (source: string) => {
+  return analyzeReferences(source);
+};
+
+/**
+ * Get supported OpenAPI versions
+ */
+export const getSupportedVersions = (): string[] => {
+  return ["2.0", "3.0.0", "3.0.1", "3.0.2", "3.0.3", "3.1.0"];
+};
+
+/**
+ * Create a Varsity instance with configuration
+ */
+export const createVarsity = (config: VarsityConfig = {}) => {
+  const mergedConfig = { ...defaultConfig, ...config };
+
+  return {
+    validate: (source: string | string[], options: ValidationOptions = {}) =>
+      validate(source, options, mergedConfig),
+    parse,
+    generateReport: (
+      source: string,
+      reportOptions: ReportOptions,
+      validationOptions: ValidationOptions = {}
+    ) =>
+      generateValidationReport(
+        source,
+        reportOptions,
+        validationOptions,
+        mergedConfig
+      ),
+    getSupportedVersions,
+    getConfig: () => ({ ...mergedConfig }),
+    updateConfig: (newConfig: Partial<VarsityConfig>) => {
+      Object.assign(mergedConfig, newConfig);
+    },
+  };
+};
+
+// Export individual functions for direct use
+export { parseOpenAPISpec, validateBasicStructure } from "./parser.js";
+export { validateOpenAPISpec } from "./validator.js";
+export { generateReport, saveReport } from "./reporter.js";
+
+export type {
+  ParsedSpec,
+  ValidationResult,
+  ValidationError,
+  ValidationOptions,
+  ReportOptions,
+  VarsityConfig,
+  OpenAPIVersion,
+  CLIResult,
+} from "./types.js";
+
+// Default export - create a default instance
+export default createVarsity();
diff --git a/test/backwards-refs/main-api.json b/test/backwards-refs/main-api.json
new file mode 100644
index 0000000..0994165
--- /dev/null
+++ b/test/backwards-refs/main-api.json
@@ -0,0 +1,53 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Backwards References API",
+    "version": "1.0.0",
+    "description": "API with backwards $ref paths for testing"
+  },
+  "paths": {
+    "/users": {
+      "get": {
+        "summary": "Get users",
+        "responses": {
+          "200": {
+            "$ref": "../shared/responses/users-response.json"
+          }
+        }
+      }
+    },
+    "/products": {
+      "get": {
+        "summary": "Get products",
+        "responses": {
+          "200": {
+            "$ref": "../shared/responses/products-response.json"
+          }
+        }
+      }
+    },
+    "/orders": {
+      "get": {
+        "summary": "Get orders",
+        "responses": {
+          "200": {
+            "$ref": "../shared/responses/orders-response.json"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "User": {
+        "$ref": "../shared/schemas/user-schema.json"
+      },
+      "Product": {
+        "$ref": "../shared/schemas/product-schema.json"
+      },
+      "Order": {
+        "$ref": "../shared/schemas/order-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/basic.test.ts b/test/basic.test.ts
new file mode 100644
index 0000000..b768289
--- /dev/null
+++ b/test/basic.test.ts
@@ -0,0 +1,145 @@
+import { describe, test, expect } from "bun:test";
+import {
+  validate,
+  parse,
+  generateValidationReport,
+  getSupportedVersions,
+  createVarsity,
+  type ValidationResult,
+} from "../src/varsity.js";
+import { resolve } from "path";
+
+describe("Varsity Library", () => {
+  const sampleSpecPath = resolve(__dirname, "sample-openapi.json");
+
+  test("should parse a valid OpenAPI specification", async () => {
+    const parsed = await parse(sampleSpecPath);
+
+    expect(parsed).toBeDefined();
+    expect(parsed.version).toBe("3.0.3");
+    expect(parsed.spec.info.title).toBe("Sample API");
+  });
+
+  test("should validate a valid OpenAPI specification", async () => {
+    const result = (await validate(sampleSpecPath)) as ValidationResult;
+
+    expect(result.valid).toBe(true);
+    expect(result.errors).toHaveLength(0);
+    expect(result.version).toBe("3.0.3");
+  });
+
+  test("should generate a JSON report", async () => {
+    const report = await generateValidationReport(sampleSpecPath, {
+      format: "json",
+      includeWarnings: true,
+      includeMetadata: true,
+    });
+
+    const parsedReport = JSON.parse(report);
+    expect(parsedReport.summary.valid).toBe(true);
+    expect(parsedReport.summary.version).toBe("3.0.3");
+  });
+
+  test("should generate a markdown report", async () => {
+    const report = await generateValidationReport(sampleSpecPath, {
+      format: "markdown",
+      includeWarnings: true,
+      includeMetadata: true,
+    });
+
+    expect(report).toContain("# OpenAPI Validation Report");
+    expect(report).toContain("✅ Valid");
+    expect(report).toContain("Sample API");
+  });
+
+  test("should get supported versions", () => {
+    const versions = getSupportedVersions();
+
+    expect(versions).toContain("2.0");
+    expect(versions).toContain("3.0.3");
+    expect(versions).toContain("3.1.0");
+  });
+
+  test("should handle invalid specification", async () => {
+    const invalidSpec = {
+      openapi: "3.0.3",
+      // Missing required 'info' and 'paths' fields
+    };
+
+    // Create a temporary file with invalid spec
+    const fs = await import("fs");
+    const tempPath = resolve(__dirname, "invalid-spec.json");
+    fs.writeFileSync(tempPath, JSON.stringify(invalidSpec));
+
+    try {
+      const result = (await validate(tempPath)) as ValidationResult;
+      expect(result.valid).toBe(false);
+      expect(result.errors.length).toBeGreaterThan(0);
+    } finally {
+      // Clean up
+      fs.unlinkSync(tempPath);
+    }
+  });
+
+  test("should work with createVarsity factory", async () => {
+    const varsity = createVarsity();
+
+    const result = (await varsity.validate(sampleSpecPath)) as ValidationResult;
+    expect(result.valid).toBe(true);
+
+    const versions = varsity.getSupportedVersions();
+    expect(versions).toContain("3.0.3");
+  });
+
+  test("should work with createVarsity factory for multiple specs", async () => {
+    const varsity = createVarsity();
+
+    const results = (await varsity.validate([
+      sampleSpecPath,
+      sampleSpecPath,
+    ])) as ValidationResult[];
+    expect(Array.isArray(results)).toBe(true);
+    expect(results).toHaveLength(2);
+    expect(results[0]?.valid).toBe(true);
+    expect(results[1]?.valid).toBe(true);
+  });
+
+  test("should validate multiple specifications", async () => {
+    const results = (await validate([
+      sampleSpecPath,
+      sampleSpecPath,
+    ])) as ValidationResult[];
+
+    expect(Array.isArray(results)).toBe(true);
+    expect(results).toHaveLength(2);
+    expect(results[0]?.valid).toBe(true);
+    expect(results[1]?.valid).toBe(true);
+  });
+
+  test("should handle mixed valid and invalid specifications", async () => {
+    const invalidSpec = {
+      openapi: "3.0.3",
+      // Missing required 'info' and 'paths' fields
+    };
+
+    // Create a temporary file with invalid spec
+    const fs = await import("fs");
+    const tempPath = resolve(__dirname, "invalid-spec-mixed.json");
+    fs.writeFileSync(tempPath, JSON.stringify(invalidSpec));
+
+    try {
+      const results = (await validate([
+        sampleSpecPath,
+        tempPath,
+      ])) as ValidationResult[];
+
+      expect(Array.isArray(results)).toBe(true);
+      expect(results).toHaveLength(2);
+      expect(results[0]?.valid).toBe(true); // Valid spec
+      expect(results[1]?.valid).toBe(false); // Invalid spec
+    } finally {
+      // Clean up
+      fs.unlinkSync(tempPath);
+    }
+  });
+});
diff --git a/test/circular-refs-api.json b/test/circular-refs-api.json
new file mode 100644
index 0000000..5ceaf81
--- /dev/null
+++ b/test/circular-refs-api.json
@@ -0,0 +1,30 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Circular References API",
+    "version": "1.0.0",
+    "description": "API with intentional circular references for testing"
+  },
+  "paths": {
+    "/users": {
+      "get": {
+        "summary": "Get users",
+        "responses": {
+          "200": {
+            "$ref": "./responses/users-response.json"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "User": {
+        "$ref": "./schemas/user-schema.json"
+      },
+      "Category": {
+        "$ref": "./schemas/category-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/deep/nested/api/main-api.json b/test/deep/nested/api/main-api.json
new file mode 100644
index 0000000..cc8a7d8
--- /dev/null
+++ b/test/deep/nested/api/main-api.json
@@ -0,0 +1,40 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Deep Nested API with Backwards References",
+    "version": "1.0.0",
+    "description": "API in deep nested directory with backwards $ref paths"
+  },
+  "paths": {
+    "/users": {
+      "get": {
+        "summary": "Get users",
+        "responses": {
+          "200": {
+            "$ref": "../../../shared/responses/users-response.json"
+          }
+        }
+      }
+    },
+    "/products": {
+      "get": {
+        "summary": "Get products",
+        "responses": {
+          "200": {
+            "$ref": "../../../shared/responses/products-response.json"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "User": {
+        "$ref": "../../../shared/schemas/user-schema.json"
+      },
+      "Product": {
+        "$ref": "../../../shared/schemas/product-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/edge-cases/very-deep/api/main-api.json b/test/edge-cases/very-deep/api/main-api.json
new file mode 100644
index 0000000..1c9f1b8
--- /dev/null
+++ b/test/edge-cases/very-deep/api/main-api.json
@@ -0,0 +1,27 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Edge Cases API",
+    "version": "1.0.0",
+    "description": "API testing various edge cases for $ref resolution"
+  },
+  "paths": {
+    "/test": {
+      "get": {
+        "summary": "Test endpoint",
+        "responses": {
+          "200": {
+            "$ref": "../../../../shared/responses/test-response.json"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "TestSchema": {
+        "$ref": "../../../../shared/schemas/test-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/main-api.json b/test/main-api.json
new file mode 100644
index 0000000..b6781fa
--- /dev/null
+++ b/test/main-api.json
@@ -0,0 +1,108 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Main API",
+    "version": "1.0.0",
+    "description": "Main API with external references"
+  },
+  "servers": [
+    {
+      "url": "https://api.example.com/v1"
+    }
+  ],
+  "paths": {
+    "/users": {
+      "get": {
+        "summary": "Get all users",
+        "responses": {
+          "200": {
+            "$ref": "./responses/users-response.json"
+          }
+        }
+      },
+      "post": {
+        "summary": "Create user",
+        "requestBody": {
+          "$ref": "./request-bodies/user-request.json"
+        },
+        "responses": {
+          "201": {
+            "$ref": "./responses/user-created-response.json"
+          },
+          "400": {
+            "$ref": "./responses/error-response.json"
+          }
+        }
+      }
+    },
+    "/users/{id}": {
+      "get": {
+        "summary": "Get user by ID",
+        "parameters": [
+          {
+            "$ref": "./parameters/user-id-param.json"
+          }
+        ],
+        "responses": {
+          "200": {
+            "$ref": "./responses/user-response.json"
+          },
+          "404": {
+            "$ref": "./responses/not-found-response.json"
+          }
+        }
+      },
+      "put": {
+        "summary": "Update user",
+        "parameters": [
+          {
+            "$ref": "./parameters/user-id-param.json"
+          }
+        ],
+        "requestBody": {
+          "$ref": "./request-bodies/user-update-request.json"
+        },
+        "responses": {
+          "200": {
+            "$ref": "./responses/user-response.json"
+          },
+          "400": {
+            "$ref": "./responses/error-response.json"
+          }
+        }
+      }
+    },
+    "/products": {
+      "$ref": "./paths/products-path.json"
+    },
+    "/orders": {
+      "$ref": "./paths/orders-path.json"
+    }
+  },
+  "components": {
+    "schemas": {
+      "User": {
+        "$ref": "./schemas/user-schema.json"
+      },
+      "Product": {
+        "$ref": "./schemas/product-schema.json"
+      },
+      "Error": {
+        "$ref": "./schemas/error-schema.json"
+      }
+    },
+    "parameters": {
+      "PageParam": {
+        "$ref": "./parameters/page-param.json"
+      },
+      "LimitParam": {
+        "$ref": "./parameters/limit-param.json"
+      }
+    },
+    "responses": {
+      "UnauthorizedResponse": {
+        "$ref": "./responses/unauthorized-response.json"
+      }
+    }
+  }
+}
diff --git a/test/parameters/category-filter-param.json b/test/parameters/category-filter-param.json
new file mode 100644
index 0000000..37cea72
--- /dev/null
+++ b/test/parameters/category-filter-param.json
@@ -0,0 +1,10 @@
+{
+  "name": "category",
+  "in": "query",
+  "description": "Filter products by category",
+  "required": false,
+  "schema": {
+    "type": "string",
+    "minLength": 1
+  }
+}
diff --git a/test/parameters/limit-param.json b/test/parameters/limit-param.json
new file mode 100644
index 0000000..d3d9b25
--- /dev/null
+++ b/test/parameters/limit-param.json
@@ -0,0 +1,12 @@
+{
+  "name": "limit",
+  "in": "query",
+  "description": "Number of items per page",
+  "required": false,
+  "schema": {
+    "type": "integer",
+    "minimum": 1,
+    "maximum": 100,
+    "default": 20
+  }
+}
diff --git a/test/parameters/order-id-param.json b/test/parameters/order-id-param.json
new file mode 100644
index 0000000..5927a63
--- /dev/null
+++ b/test/parameters/order-id-param.json
@@ -0,0 +1,10 @@
+{
+  "name": "orderId",
+  "in": "path",
+  "description": "Order ID",
+  "required": true,
+  "schema": {
+    "type": "string",
+    "pattern": "^ORD-[0-9]{8}$"
+  }
+}
diff --git a/test/parameters/page-param.json b/test/parameters/page-param.json
new file mode 100644
index 0000000..bf154c3
--- /dev/null
+++ b/test/parameters/page-param.json
@@ -0,0 +1,11 @@
+{
+  "name": "page",
+  "in": "query",
+  "description": "Page number for pagination",
+  "required": false,
+  "schema": {
+    "type": "integer",
+    "minimum": 1,
+    "default": 1
+  }
+}
diff --git a/test/parameters/status-filter-param.json b/test/parameters/status-filter-param.json
new file mode 100644
index 0000000..64d0403
--- /dev/null
+++ b/test/parameters/status-filter-param.json
@@ -0,0 +1,10 @@
+{
+  "name": "status",
+  "in": "query",
+  "description": "Filter orders by status",
+  "required": false,
+  "schema": {
+    "type": "string",
+    "enum": ["pending", "processing", "shipped", "delivered", "cancelled"]
+  }
+}
diff --git a/test/parameters/user-id-param.json b/test/parameters/user-id-param.json
new file mode 100644
index 0000000..8cc306f
--- /dev/null
+++ b/test/parameters/user-id-param.json
@@ -0,0 +1,11 @@
+{
+  "name": "id",
+  "in": "path",
+  "description": "User ID",
+  "required": true,
+  "schema": {
+    "type": "integer",
+    "format": "int64",
+    "minimum": 1
+  }
+}
diff --git a/test/paths/orders-path.json b/test/paths/orders-path.json
new file mode 100644
index 0000000..2e36080
--- /dev/null
+++ b/test/paths/orders-path.json
@@ -0,0 +1,74 @@
+{
+  "get": {
+    "summary": "Get all orders",
+    "description": "Retrieve orders for the authenticated user",
+    "parameters": [
+      {
+        "$ref": "../parameters/page-param.json"
+      },
+      {
+        "$ref": "../parameters/limit-param.json"
+      },
+      {
+        "$ref": "../parameters/status-filter-param.json"
+      }
+    ],
+    "responses": {
+      "200": {
+        "description": "List of orders",
+        "$ref": "../responses/orders-response.json"
+      },
+      "401": {
+        "description": "Unauthorized",
+        "$ref": "../responses/unauthorized-response.json"
+      }
+    }
+  },
+  "post": {
+    "summary": "Create a new order",
+    "description": "Place a new order",
+    "requestBody": {
+      "$ref": "../request-bodies/order-request.json"
+    },
+    "responses": {
+      "201": {
+        "description": "Order created successfully",
+        "$ref": "../responses/order-created-response.json"
+      },
+      "400": {
+        "description": "Bad request",
+        "$ref": "../responses/error-response.json"
+      },
+      "401": {
+        "description": "Unauthorized",
+        "$ref": "../responses/unauthorized-response.json"
+      }
+    }
+  },
+  "put": {
+    "summary": "Update order status",
+    "description": "Update the status of an existing order",
+    "parameters": [
+      {
+        "$ref": "../parameters/order-id-param.json"
+      }
+    ],
+    "requestBody": {
+      "$ref": "../request-bodies/order-status-update.json"
+    },
+    "responses": {
+      "200": {
+        "description": "Order updated successfully",
+        "$ref": "../responses/order-response.json"
+      },
+      "400": {
+        "description": "Bad request",
+        "$ref": "../responses/error-response.json"
+      },
+      "404": {
+        "description": "Order not found",
+        "$ref": "../responses/not-found-response.json"
+      }
+    }
+  }
+}
diff --git a/test/paths/products-path.json b/test/paths/products-path.json
new file mode 100644
index 0000000..13a8503
--- /dev/null
+++ b/test/paths/products-path.json
@@ -0,0 +1,48 @@
+{
+  "get": {
+    "summary": "Get all products",
+    "description": "Retrieve a paginated list of products with optional filtering",
+    "parameters": [
+      {
+        "$ref": "../parameters/page-param.json"
+      },
+      {
+        "$ref": "../parameters/limit-param.json"
+      },
+      {
+        "$ref": "../parameters/category-filter-param.json"
+      }
+    ],
+    "responses": {
+      "200": {
+        "description": "List of products",
+        "$ref": "../responses/products-response.json"
+      },
+      "400": {
+        "description": "Bad request",
+        "$ref": "../responses/error-response.json"
+      }
+    }
+  },
+  "post": {
+    "summary": "Create a new product",
+    "description": "Add a new product to the catalog",
+    "requestBody": {
+      "$ref": "../request-bodies/product-request.json"
+    },
+    "responses": {
+      "201": {
+        "description": "Product created successfully",
+        "$ref": "../responses/product-created-response.json"
+      },
+      "400": {
+        "description": "Bad request",
+        "$ref": "../responses/error-response.json"
+      },
+      "401": {
+        "description": "Unauthorized",
+        "$ref": "../responses/unauthorized-response.json"
+      }
+    }
+  }
+}
diff --git a/test/request-bodies/order-request.json b/test/request-bodies/order-request.json
new file mode 100644
index 0000000..6811e65
--- /dev/null
+++ b/test/request-bodies/order-request.json
@@ -0,0 +1,34 @@
+{
+  "description": "Order creation data",
+  "required": true,
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "required": ["items", "shippingAddress"],
+        "properties": {
+          "items": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/order-item-schema.json"
+            },
+            "minItems": 1
+          },
+          "shippingAddress": {
+            "$ref": "../schemas/address-schema.json"
+          },
+          "billingAddress": {
+            "$ref": "../schemas/address-schema.json"
+          },
+          "paymentMethod": {
+            "$ref": "../schemas/payment-method-schema.json"
+          },
+          "notes": {
+            "type": "string",
+            "maxLength": 500
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/request-bodies/order-status-update.json b/test/request-bodies/order-status-update.json
new file mode 100644
index 0000000..ce4b7f2
--- /dev/null
+++ b/test/request-bodies/order-status-update.json
@@ -0,0 +1,32 @@
+{
+  "description": "Order status update data",
+  "required": true,
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "required": ["status"],
+        "properties": {
+          "status": {
+            "type": "string",
+            "enum": [
+              "pending",
+              "processing",
+              "shipped",
+              "delivered",
+              "cancelled"
+            ]
+          },
+          "trackingNumber": {
+            "type": "string",
+            "pattern": "^[A-Z0-9]{10,20}$"
+          },
+          "notes": {
+            "type": "string",
+            "maxLength": 500
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/request-bodies/product-request.json b/test/request-bodies/product-request.json
new file mode 100644
index 0000000..a7f23ae
--- /dev/null
+++ b/test/request-bodies/product-request.json
@@ -0,0 +1,38 @@
+{
+  "description": "Product creation data",
+  "required": true,
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "required": ["name", "price"],
+        "properties": {
+          "name": {
+            "type": "string",
+            "minLength": 1,
+            "maxLength": 200
+          },
+          "description": {
+            "type": "string",
+            "maxLength": 1000
+          },
+          "price": {
+            "$ref": "../schemas/price-schema.json"
+          },
+          "category": {
+            "$ref": "../schemas/category-schema.json"
+          },
+          "inventory": {
+            "$ref": "../schemas/inventory-schema.json"
+          },
+          "tags": {
+            "type": "array",
+            "items": {
+              "type": "string"
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/request-bodies/user-request.json b/test/request-bodies/user-request.json
new file mode 100644
index 0000000..dca3b94
--- /dev/null
+++ b/test/request-bodies/user-request.json
@@ -0,0 +1,34 @@
+{
+  "description": "User creation data",
+  "required": true,
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "required": ["name", "email"],
+        "properties": {
+          "name": {
+            "type": "string",
+            "minLength": 1,
+            "maxLength": 100
+          },
+          "email": {
+            "type": "string",
+            "format": "email"
+          },
+          "age": {
+            "type": "integer",
+            "minimum": 0,
+            "maximum": 150
+          },
+          "address": {
+            "$ref": "../schemas/address-schema.json"
+          },
+          "preferences": {
+            "$ref": "../schemas/user-preferences-schema.json"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/request-bodies/user-update-request.json b/test/request-bodies/user-update-request.json
new file mode 100644
index 0000000..44ffd6f
--- /dev/null
+++ b/test/request-bodies/user-update-request.json
@@ -0,0 +1,33 @@
+{
+  "description": "User update data",
+  "required": true,
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string",
+            "minLength": 1,
+            "maxLength": 100
+          },
+          "email": {
+            "type": "string",
+            "format": "email"
+          },
+          "age": {
+            "type": "integer",
+            "minimum": 0,
+            "maximum": 150
+          },
+          "address": {
+            "$ref": "../schemas/address-schema.json"
+          },
+          "preferences": {
+            "$ref": "../schemas/user-preferences-schema.json"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/error-response.json b/test/responses/error-response.json
new file mode 100644
index 0000000..b271e78
--- /dev/null
+++ b/test/responses/error-response.json
@@ -0,0 +1,10 @@
+{
+  "description": "Bad request error",
+  "content": {
+    "application/json": {
+      "schema": {
+        "$ref": "../schemas/error-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/responses/not-found-response.json b/test/responses/not-found-response.json
new file mode 100644
index 0000000..c61ecd3
--- /dev/null
+++ b/test/responses/not-found-response.json
@@ -0,0 +1,10 @@
+{
+  "description": "Resource not found",
+  "content": {
+    "application/json": {
+      "schema": {
+        "$ref": "../schemas/error-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/responses/order-created-response.json b/test/responses/order-created-response.json
new file mode 100644
index 0000000..da6a4d9
--- /dev/null
+++ b/test/responses/order-created-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "Order created successfully",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "$ref": "../schemas/order-schema.json"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/order-response.json b/test/responses/order-response.json
new file mode 100644
index 0000000..8d725e7
--- /dev/null
+++ b/test/responses/order-response.json
@@ -0,0 +1,15 @@
+{
+  "description": "Order details",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "$ref": "../schemas/order-schema.json"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/orders-response.json b/test/responses/orders-response.json
new file mode 100644
index 0000000..0152a17
--- /dev/null
+++ b/test/responses/orders-response.json
@@ -0,0 +1,21 @@
+{
+  "description": "List of orders",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/order-schema.json"
+            }
+          },
+          "pagination": {
+            "$ref": "../schemas/pagination-schema.json"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/product-created-response.json b/test/responses/product-created-response.json
new file mode 100644
index 0000000..9cfc9f2
--- /dev/null
+++ b/test/responses/product-created-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "Product created successfully",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "$ref": "../schemas/product-schema.json"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/products-response.json b/test/responses/products-response.json
new file mode 100644
index 0000000..4be3c28
--- /dev/null
+++ b/test/responses/products-response.json
@@ -0,0 +1,21 @@
+{
+  "description": "List of products",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/product-schema.json"
+            }
+          },
+          "pagination": {
+            "$ref": "../schemas/pagination-schema.json"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/unauthorized-response.json b/test/responses/unauthorized-response.json
new file mode 100644
index 0000000..14995c7
--- /dev/null
+++ b/test/responses/unauthorized-response.json
@@ -0,0 +1,10 @@
+{
+  "description": "Unauthorized access",
+  "content": {
+    "application/json": {
+      "schema": {
+        "$ref": "../schemas/error-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/responses/user-created-response.json b/test/responses/user-created-response.json
new file mode 100644
index 0000000..8e529a3
--- /dev/null
+++ b/test/responses/user-created-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "User created successfully",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "$ref": "../schemas/user-schema.json"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/user-response.json b/test/responses/user-response.json
new file mode 100644
index 0000000..f43409f
--- /dev/null
+++ b/test/responses/user-response.json
@@ -0,0 +1,15 @@
+{
+  "description": "User details",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "$ref": "../schemas/user-schema.json"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/responses/users-response.json b/test/responses/users-response.json
new file mode 100644
index 0000000..a5bb599
--- /dev/null
+++ b/test/responses/users-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "List of users",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/user-schema.json"
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/sample-openapi.json b/test/sample-openapi.json
new file mode 100644
index 0000000..0c5a453
--- /dev/null
+++ b/test/sample-openapi.json
@@ -0,0 +1,43 @@
+{
+  "openapi": "3.0.3",
+  "info": {
+    "title": "Sample API",
+    "version": "1.0.0",
+    "description": "A sample OpenAPI specification for testing"
+  },
+  "servers": [
+    {
+      "url": "https://api.example.com/v1"
+    }
+  ],
+  "paths": {
+    "/users": {
+      "get": {
+        "summary": "Get all users",
+        "responses": {
+          "200": {
+            "description": "Successful response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "type": "object",
+                    "properties": {
+                      "id": {
+                        "type": "integer"
+                      },
+                      "name": {
+                        "type": "string"
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/schemas/address-schema.json b/test/schemas/address-schema.json
new file mode 100644
index 0000000..c83f999
--- /dev/null
+++ b/test/schemas/address-schema.json
@@ -0,0 +1,28 @@
+{
+  "type": "object",
+  "properties": {
+    "street": {
+      "type": "string",
+      "description": "Street address"
+    },
+    "city": {
+      "type": "string",
+      "description": "City name"
+    },
+    "state": {
+      "type": "string",
+      "description": "State or province"
+    },
+    "zipCode": {
+      "type": "string",
+      "pattern": "^[0-9]{5}(-[0-9]{4})?$",
+      "description": "ZIP or postal code"
+    },
+    "country": {
+      "type": "string",
+      "minLength": 2,
+      "maxLength": 2,
+      "description": "Two-letter country code"
+    }
+  }
+}
diff --git a/test/schemas/category-schema.json b/test/schemas/category-schema.json
new file mode 100644
index 0000000..94d3065
--- /dev/null
+++ b/test/schemas/category-schema.json
@@ -0,0 +1,21 @@
+{
+  "type": "object",
+  "required": ["id", "name"],
+  "properties": {
+    "id": {
+      "type": "integer"
+    },
+    "name": {
+      "type": "string"
+    },
+    "parent": {
+      "$ref": "./category-schema.json"
+    },
+    "children": {
+      "type": "array",
+      "items": {
+        "$ref": "./category-schema.json"
+      }
+    }
+  }
+}
diff --git a/test/schemas/error-schema.json b/test/schemas/error-schema.json
new file mode 100644
index 0000000..6fd6e83
--- /dev/null
+++ b/test/schemas/error-schema.json
@@ -0,0 +1,19 @@
+{
+  "type": "object",
+  "required": ["code", "message"],
+  "properties": {
+    "code": {
+      "type": "string"
+    },
+    "message": {
+      "type": "string"
+    },
+    "details": {
+      "type": "string"
+    },
+    "timestamp": {
+      "type": "string",
+      "format": "date-time"
+    }
+  }
+}
diff --git a/test/schemas/inventory-schema.json b/test/schemas/inventory-schema.json
new file mode 100644
index 0000000..049bc1e
--- /dev/null
+++ b/test/schemas/inventory-schema.json
@@ -0,0 +1,20 @@
+{
+  "type": "object",
+  "properties": {
+    "quantity": {
+      "type": "integer",
+      "minimum": 0
+    },
+    "reserved": {
+      "type": "integer",
+      "minimum": 0
+    },
+    "available": {
+      "type": "integer",
+      "minimum": 0
+    },
+    "warehouse": {
+      "$ref": "./warehouse-schema.json"
+    }
+  }
+}
diff --git a/test/schemas/order-item-schema.json b/test/schemas/order-item-schema.json
new file mode 100644
index 0000000..0dea28b
--- /dev/null
+++ b/test/schemas/order-item-schema.json
@@ -0,0 +1,23 @@
+{
+  "type": "object",
+  "required": ["productId", "quantity"],
+  "properties": {
+    "productId": {
+      "type": "integer",
+      "format": "int64",
+      "minimum": 1
+    },
+    "quantity": {
+      "type": "integer",
+      "minimum": 1
+    },
+    "price": {
+      "$ref": "./price-schema.json"
+    },
+    "discount": {
+      "type": "number",
+      "minimum": 0,
+      "maximum": 1
+    }
+  }
+}
diff --git a/test/schemas/order-schema.json b/test/schemas/order-schema.json
new file mode 100644
index 0000000..a616224
--- /dev/null
+++ b/test/schemas/order-schema.json
@@ -0,0 +1,44 @@
+{
+  "type": "object",
+  "required": ["id", "status", "items", "total"],
+  "properties": {
+    "id": {
+      "type": "string",
+      "pattern": "^ORD-[0-9]{8}$"
+    },
+    "status": {
+      "type": "string",
+      "enum": ["pending", "processing", "shipped", "delivered", "cancelled"]
+    },
+    "items": {
+      "type": "array",
+      "items": {
+        "$ref": "./order-item-schema.json"
+      }
+    },
+    "total": {
+      "$ref": "./price-schema.json"
+    },
+    "shippingAddress": {
+      "$ref": "./address-schema.json"
+    },
+    "billingAddress": {
+      "$ref": "./address-schema.json"
+    },
+    "paymentMethod": {
+      "$ref": "./payment-method-schema.json"
+    },
+    "trackingNumber": {
+      "type": "string",
+      "pattern": "^[A-Z0-9]{10,20}$"
+    },
+    "createdAt": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "updatedAt": {
+      "type": "string",
+      "format": "date-time"
+    }
+  }
+}
diff --git a/test/schemas/pagination-schema.json b/test/schemas/pagination-schema.json
new file mode 100644
index 0000000..5eef452
--- /dev/null
+++ b/test/schemas/pagination-schema.json
@@ -0,0 +1,28 @@
+{
+  "type": "object",
+  "properties": {
+    "page": {
+      "type": "integer",
+      "minimum": 1
+    },
+    "limit": {
+      "type": "integer",
+      "minimum": 1,
+      "maximum": 100
+    },
+    "total": {
+      "type": "integer",
+      "minimum": 0
+    },
+    "totalPages": {
+      "type": "integer",
+      "minimum": 0
+    },
+    "hasNext": {
+      "type": "boolean"
+    },
+    "hasPrev": {
+      "type": "boolean"
+    }
+  }
+}
diff --git a/test/schemas/payment-method-schema.json b/test/schemas/payment-method-schema.json
new file mode 100644
index 0000000..9048279
--- /dev/null
+++ b/test/schemas/payment-method-schema.json
@@ -0,0 +1,35 @@
+{
+  "type": "object",
+  "required": ["type", "details"],
+  "properties": {
+    "type": {
+      "type": "string",
+      "enum": ["credit_card", "debit_card", "paypal", "bank_transfer"]
+    },
+    "details": {
+      "type": "object",
+      "properties": {
+        "cardNumber": {
+          "type": "string",
+          "pattern": "^[0-9]{13,19}$"
+        },
+        "expiryMonth": {
+          "type": "integer",
+          "minimum": 1,
+          "maximum": 12
+        },
+        "expiryYear": {
+          "type": "integer",
+          "minimum": 2024
+        },
+        "cvv": {
+          "type": "string",
+          "pattern": "^[0-9]{3,4}$"
+        },
+        "accountId": {
+          "type": "string"
+        }
+      }
+    }
+  }
+}
diff --git a/test/schemas/price-schema.json b/test/schemas/price-schema.json
new file mode 100644
index 0000000..bed6e0a
--- /dev/null
+++ b/test/schemas/price-schema.json
@@ -0,0 +1,30 @@
+{
+  "type": "object",
+  "required": ["amount", "currency"],
+  "properties": {
+    "amount": {
+      "type": "number",
+      "minimum": 0,
+      "multipleOf": 0.01
+    },
+    "currency": {
+      "type": "string",
+      "pattern": "^[A-Z]{3}$",
+      "description": "ISO 4217 currency code"
+    },
+    "discount": {
+      "type": "object",
+      "properties": {
+        "percentage": {
+          "type": "number",
+          "minimum": 0,
+          "maximum": 100
+        },
+        "validUntil": {
+          "type": "string",
+          "format": "date"
+        }
+      }
+    }
+  }
+}
diff --git a/test/schemas/privacy-settings-schema.json b/test/schemas/privacy-settings-schema.json
new file mode 100644
index 0000000..449e945
--- /dev/null
+++ b/test/schemas/privacy-settings-schema.json
@@ -0,0 +1,18 @@
+{
+  "type": "object",
+  "properties": {
+    "profileVisibility": {
+      "type": "string",
+      "enum": ["public", "private", "friends"],
+      "default": "private"
+    },
+    "dataSharing": {
+      "type": "boolean",
+      "default": false
+    },
+    "analytics": {
+      "type": "boolean",
+      "default": true
+    }
+  }
+}
diff --git a/test/schemas/product-schema.json b/test/schemas/product-schema.json
new file mode 100644
index 0000000..29b7486
--- /dev/null
+++ b/test/schemas/product-schema.json
@@ -0,0 +1,34 @@
+{
+  "type": "object",
+  "required": ["id", "name", "price"],
+  "properties": {
+    "id": {
+      "type": "integer",
+      "format": "int64"
+    },
+    "name": {
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 200
+    },
+    "description": {
+      "type": "string",
+      "maxLength": 1000
+    },
+    "price": {
+      "$ref": "./price-schema.json"
+    },
+    "category": {
+      "$ref": "./category-schema.json"
+    },
+    "inventory": {
+      "$ref": "./inventory-schema.json"
+    },
+    "tags": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    }
+  }
+}
diff --git a/test/schemas/user-preferences-schema.json b/test/schemas/user-preferences-schema.json
new file mode 100644
index 0000000..fcdc571
--- /dev/null
+++ b/test/schemas/user-preferences-schema.json
@@ -0,0 +1,37 @@
+{
+  "type": "object",
+  "properties": {
+    "theme": {
+      "type": "string",
+      "enum": ["light", "dark", "auto"],
+      "default": "auto",
+      "description": "User's preferred theme"
+    },
+    "language": {
+      "type": "string",
+      "pattern": "^[a-z]{2}(-[A-Z]{2})?$",
+      "default": "en",
+      "description": "User's preferred language code"
+    },
+    "notifications": {
+      "type": "object",
+      "properties": {
+        "email": {
+          "type": "boolean",
+          "default": true
+        },
+        "push": {
+          "type": "boolean",
+          "default": false
+        },
+        "sms": {
+          "type": "boolean",
+          "default": false
+        }
+      }
+    },
+    "privacy": {
+      "$ref": "./privacy-settings-schema.json"
+    }
+  }
+}
diff --git a/test/schemas/user-schema.json b/test/schemas/user-schema.json
new file mode 100644
index 0000000..30b3baa
--- /dev/null
+++ b/test/schemas/user-schema.json
@@ -0,0 +1,44 @@
+{
+  "type": "object",
+  "required": ["id", "name", "email"],
+  "properties": {
+    "id": {
+      "type": "integer",
+      "format": "int64",
+      "description": "Unique identifier for the user"
+    },
+    "name": {
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 100,
+      "description": "User's full name"
+    },
+    "email": {
+      "type": "string",
+      "format": "email",
+      "description": "User's email address"
+    },
+    "age": {
+      "type": "integer",
+      "minimum": 0,
+      "maximum": 150,
+      "description": "User's age"
+    },
+    "address": {
+      "$ref": "./address-schema.json"
+    },
+    "preferences": {
+      "$ref": "./user-preferences-schema.json"
+    },
+    "createdAt": {
+      "type": "string",
+      "format": "date-time",
+      "description": "When the user was created"
+    },
+    "updatedAt": {
+      "type": "string",
+      "format": "date-time",
+      "description": "When the user was last updated"
+    }
+  }
+}
diff --git a/test/schemas/warehouse-schema.json b/test/schemas/warehouse-schema.json
new file mode 100644
index 0000000..4f6dddb
--- /dev/null
+++ b/test/schemas/warehouse-schema.json
@@ -0,0 +1,15 @@
+{
+  "type": "object",
+  "required": ["id", "name"],
+  "properties": {
+    "id": {
+      "type": "string"
+    },
+    "name": {
+      "type": "string"
+    },
+    "location": {
+      "$ref": "./address-schema.json"
+    }
+  }
+}
diff --git a/test/shared/responses/orders-response.json b/test/shared/responses/orders-response.json
new file mode 100644
index 0000000..c193bc7
--- /dev/null
+++ b/test/shared/responses/orders-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "List of orders",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/order-schema.json"
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/shared/responses/products-response.json b/test/shared/responses/products-response.json
new file mode 100644
index 0000000..4c1a0bf
--- /dev/null
+++ b/test/shared/responses/products-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "List of products",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/product-schema.json"
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/shared/responses/test-response.json b/test/shared/responses/test-response.json
new file mode 100644
index 0000000..53a5440
--- /dev/null
+++ b/test/shared/responses/test-response.json
@@ -0,0 +1,15 @@
+{
+  "description": "Test response",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/shared/responses/users-response.json b/test/shared/responses/users-response.json
new file mode 100644
index 0000000..a5bb599
--- /dev/null
+++ b/test/shared/responses/users-response.json
@@ -0,0 +1,18 @@
+{
+  "description": "List of users",
+  "content": {
+    "application/json": {
+      "schema": {
+        "type": "object",
+        "properties": {
+          "data": {
+            "type": "array",
+            "items": {
+              "$ref": "../schemas/user-schema.json"
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/test/shared/schemas/address-schema.json b/test/shared/schemas/address-schema.json
new file mode 100644
index 0000000..ae3c1c3
--- /dev/null
+++ b/test/shared/schemas/address-schema.json
@@ -0,0 +1,23 @@
+{
+  "type": "object",
+  "properties": {
+    "street": {
+      "type": "string"
+    },
+    "city": {
+      "type": "string"
+    },
+    "state": {
+      "type": "string"
+    },
+    "zipCode": {
+      "type": "string",
+      "pattern": "^[0-9]{5}(-[0-9]{4})?$"
+    },
+    "country": {
+      "type": "string",
+      "minLength": 2,
+      "maxLength": 2
+    }
+  }
+}
diff --git a/test/shared/schemas/category-schema.json b/test/shared/schemas/category-schema.json
new file mode 100644
index 0000000..1f391c4
--- /dev/null
+++ b/test/shared/schemas/category-schema.json
@@ -0,0 +1,15 @@
+{
+  "type": "object",
+  "required": ["id", "name"],
+  "properties": {
+    "id": {
+      "type": "integer"
+    },
+    "name": {
+      "type": "string"
+    },
+    "description": {
+      "type": "string"
+    }
+  }
+}
diff --git a/test/shared/schemas/order-item-schema.json b/test/shared/schemas/order-item-schema.json
new file mode 100644
index 0000000..6c71fdc
--- /dev/null
+++ b/test/shared/schemas/order-item-schema.json
@@ -0,0 +1,18 @@
+{
+  "type": "object",
+  "required": ["productId", "quantity"],
+  "properties": {
+    "productId": {
+      "type": "integer",
+      "format": "int64",
+      "minimum": 1
+    },
+    "quantity": {
+      "type": "integer",
+      "minimum": 1
+    },
+    "price": {
+      "$ref": "./price-schema.json"
+    }
+  }
+}
diff --git a/test/shared/schemas/order-schema.json b/test/shared/schemas/order-schema.json
new file mode 100644
index 0000000..3d6f198
--- /dev/null
+++ b/test/shared/schemas/order-schema.json
@@ -0,0 +1,23 @@
+{
+  "type": "object",
+  "required": ["id", "status", "items"],
+  "properties": {
+    "id": {
+      "type": "string",
+      "pattern": "^ORD-[0-9]{8}$"
+    },
+    "status": {
+      "type": "string",
+      "enum": ["pending", "processing", "shipped", "delivered", "cancelled"]
+    },
+    "items": {
+      "type": "array",
+      "items": {
+        "$ref": "./order-item-schema.json"
+      }
+    },
+    "total": {
+      "$ref": "./price-schema.json"
+    }
+  }
+}
diff --git a/test/shared/schemas/price-schema.json b/test/shared/schemas/price-schema.json
new file mode 100644
index 0000000..8610b98
--- /dev/null
+++ b/test/shared/schemas/price-schema.json
@@ -0,0 +1,15 @@
+{
+  "type": "object",
+  "required": ["amount", "currency"],
+  "properties": {
+    "amount": {
+      "type": "number",
+      "minimum": 0,
+      "multipleOf": 0.01
+    },
+    "currency": {
+      "type": "string",
+      "pattern": "^[A-Z]{3}$"
+    }
+  }
+}
diff --git a/test/shared/schemas/product-schema.json b/test/shared/schemas/product-schema.json
new file mode 100644
index 0000000..bd91784
--- /dev/null
+++ b/test/shared/schemas/product-schema.json
@@ -0,0 +1,21 @@
+{
+  "type": "object",
+  "required": ["id", "name", "price"],
+  "properties": {
+    "id": {
+      "type": "integer",
+      "format": "int64"
+    },
+    "name": {
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 200
+    },
+    "price": {
+      "$ref": "./price-schema.json"
+    },
+    "category": {
+      "$ref": "./category-schema.json"
+    }
+  }
+}
diff --git a/test/shared/schemas/test-schema.json b/test/shared/schemas/test-schema.json
new file mode 100644
index 0000000..1f391c4
--- /dev/null
+++ b/test/shared/schemas/test-schema.json
@@ -0,0 +1,15 @@
+{
+  "type": "object",
+  "required": ["id", "name"],
+  "properties": {
+    "id": {
+      "type": "integer"
+    },
+    "name": {
+      "type": "string"
+    },
+    "description": {
+      "type": "string"
+    }
+  }
+}
diff --git a/test/shared/schemas/user-schema.json b/test/shared/schemas/user-schema.json
new file mode 100644
index 0000000..9f1b8f6
--- /dev/null
+++ b/test/shared/schemas/user-schema.json
@@ -0,0 +1,22 @@
+{
+  "type": "object",
+  "required": ["id", "name", "email"],
+  "properties": {
+    "id": {
+      "type": "integer",
+      "format": "int64"
+    },
+    "name": {
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 100
+    },
+    "email": {
+      "type": "string",
+      "format": "email"
+    },
+    "address": {
+      "$ref": "./address-schema.json"
+    }
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..bfa0fea
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,29 @@
+{
+  "compilerOptions": {
+    // Environment setup & latest features
+    "lib": ["ESNext"],
+    "target": "ESNext",
+    "module": "Preserve",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}