> For the complete documentation index, see [llms.txt](https://trex-1.gitbook.io/trex/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trex-1.gitbook.io/trex/architecture.md).

# Architecture

- [Chain Layer](https://trex-1.gitbook.io/trex/architecture/chain-layer.md): Scaling with Ethereum security
- [Persona Layer: Passport, Badges, Validators](https://trex-1.gitbook.io/trex/architecture/persona-layer-passport-badges-validators.md): Passport, badges, and validators
- [Passports](https://trex-1.gitbook.io/trex/architecture/persona-layer-passport-badges-validators/passports.md): The anchor of identity
- [Badges](https://trex-1.gitbook.io/trex/architecture/persona-layer-passport-badges-validators/badges.md): The proof of activity
- [Validators](https://trex-1.gitbook.io/trex/architecture/persona-layer-passport-badges-validators/validators.md): The engines of trust
- [Builder & Activation Layers](https://trex-1.gitbook.io/trex/architecture/builder-and-activation-layers.md): From integration to applications.
- [Builder Layer](https://trex-1.gitbook.io/trex/architecture/builder-and-activation-layers/builder-layer.md): SDKs, APIs, and open contracts.
- [Activation Layer](https://trex-1.gitbook.io/trex/architecture/builder-and-activation-layers/activation-layer.md): Matching, recommendations, and services.