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annotations.\nDefine field-level constraints on DTOs, records, and nested objects and get structured, human-readable errors back without framework dependencies.\n\n[Read the documentation](https://teki.ditsche.dev) • [Getting Started](https://teki.ditsche.dev/docs/getting-started) • [GitHub Releases](https://github.com/ditschedev/teki/releases)\n\n## Why Teki\n\n- Fluent builder API and annotation-based validation in one library\n- Structured field errors with stable type identifiers\n- Nested objects, arrays, and conditional rules\n- Value normalization — trim, default, and transform during validation\n- No framework dependencies, works with plain Java, Spring Boot, and more\n\n## Installation\n\n```xml\n\u003cdependency\u003e\n  \u003cgroupId\u003edev.ditsche\u003c/groupId\u003e\n  \u003cartifactId\u003eteki\u003c/artifactId\u003e\n  \u003cversion\u003e1.0.1\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\nRequires Java 17+.\n\n## Quick Example\n\n```java\nimport static dev.ditsche.teki.rule.builder.Rules.*;\n\nTeki schema = Teki.fromRules(\n    string(Request::getEmail).required().email().trim(),\n    string(Request::password).required().min(8),\n    number(\"age\").required().positive()\n);\n\nRequest result = schema.validate(request);\n// or\nValidationOutcome\u003cRequest\u003e result = schema.check(request);\n\n```\n\n## Development\n\nContributions are welcome.\n\n- Run the Java tests with `mvn test`\n- Start the docs app with `cd docs \u0026\u0026 pnpm dev`\n- Use the docs site for the full guides and API explanations: [teki.ditsche.dev](https://teki.ditsche.dev)\n\nIf you want to contribute, opening an issue or pull request with a small focused change is the easiest way to get 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