Thanks for joining {{company.name}}.
\nYour account was created on {{user.joinDate}}.
\nVisit us at {{company.websiteUrl}}.
\n`;\n\nconst validation = registry.validateTemplate('user_welcome', template);\n\nif (!validation.isValid) {\n console.log('Template errors:');\n validation.errors.forEach(error => {\n console.log(`Line ${error.line}: ${error.message}`);\n });\n // Output: Line 4: Undefined variable 'company.websiteUrl'\n\n // Get suggestions for undefined variables\n validation.undefinedVariables.forEach(undef => {\n console.log(`Undefined: ${undef.name}`);\n console.log(`Did you mean: ${undef.suggestions?.join(', ')}`);\n });\n // Output: Did you mean: company.logoUrl, company.name\n}\n\n// Check for unused required variables\nif (validation.unusedVariables.length > 0) {\n console.log('Warning: Required variables not used:');\n validation.unusedVariables.forEach(path => {\n console.log(` - ${path}`);\n });\n}\n```\n\n### Variable Extraction\n\n```typescript\n// Extract all variables from a template\nconst variables = registry.extractVariables(template);\n\nvariables.forEach(variable => {\n console.log(`Found: ${variable.path} at line ${variable.line}`);\n console.log(` Context: ${variable.context}`);\n console.log(` Is conditional: ${variable.isConditional}`);\n console.log(` Is loop: ${variable.isLoop}`);\n});\n```\n\n### Autocomplete Suggestions\n\n```typescript\n// Get all top-level variables\nconst allSuggestions = registry.getVariableSuggestions('user_welcome');\n\n// Get suggestions with prefix\nconst userSuggestions = registry.getVariableSuggestions('user_welcome', 'user.');\n\n// Returns:\n// [\n// { path: 'user.name', type: 'string', description: 'User full name', required: true },\n// { path: 'user.email', type: 'string', description: 'User email address', required: true },\n// { path: 'user.joinDate', type: 'date', description: 'Account creation date', required: false }\n// ]\n\n// Get path completions for partial input\nconst completions = registry.getPathCompletions('user_welcome', 'user.');\n```\n\n### Context Inheritance\n\n```typescript\n// Create base context\nregistry.registerContext('base_user', {\n name: 'base_user',\n variables: {\n user: {\n type: 'object',\n required: true,\n children: {\n name: { type: 'string', required: true },\n email: { type: 'string', required: true }\n }\n }\n }\n});\n\n// Extend base context\nregistry.registerContext('user_welcome', {\n name: 'user_welcome',\n extends: ['base_user'],\n variables: {\n welcomeMessage: { type: 'string', required: false },\n activationUrl: { type: 'string', required: true }\n }\n});\n\n// user_welcome now has: user.name, user.email, welcomeMessage, activationUrl\n```\n\n### Validation Rules\n\n```typescript\nimport { lengthRule, patternRule, CommonRules } from '@bernierllc/template-variable-registry';\n\nregistry.registerContext('signup', {\n name: 'signup',\n variables: {\n email: {\n type: 'string',\n required: true,\n validation: [\n CommonRules.email(),\n lengthRule(5, 255)\n ]\n },\n password: {\n type: 'string',\n required: true,\n validation: [\n lengthRule(8, undefined, 'Password must be at least 8 characters'),\n patternRule(/[A-Z]/, 'Must contain uppercase letter')\n ]\n },\n age: {\n type: 'number',\n required: true,\n validation: [\n CommonRules.positiveNumber()\n ]\n }\n }\n});\n```\n\n### Jinja2 Template Support\n\n```typescript\nconst jinja2Template = `\nYou have premium access!
\n{% endif %}\n