> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vijil.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Welcome to Vijil

> The trust layer for AI agents measure reliability, security, and safety, then ship with evidence.

<Tip>
  **TL;DR:** Vijil is the trust layer for [AI agents](/owner-guide/register-agents/what-is-an-agent), measuring [reliability](/concepts/trust-score/reliability), [security](/concepts/trust-score/security), and [safety](/concepts/trust-score/safety) before deployment ([Diamond](/concepts/platform/diamond)), protecting Agents at runtime ([Dome](/concepts/platform/dome)), and and evolving them through real-world feedback ([Darwin](/concepts/platform/darwin)). Start with [Concepts](/concepts/trust-score/introduction) for the mental model, or jump to the [Owner's Guide](/owner-guide/getting-started/introduction) or [Developer Guide](/developer-guide/getting-started/introduction) to get started. If you do not yet know what is running in your estate, begin with [Discover](/concepts/platform/discover).
</Tip>

Agents often stall before production: security and compliance need **proof**, not demos. Vijil turns that into **measurable trust**, systematic evaluation, runtime protection, and a feedback loop from real behavior.

[**Trust Score**](/concepts/trust-score/introduction) summarizes how an Agent performs across [**reliability**](/concepts/trust-score/reliability), [**security**](/concepts/trust-score/security), and [**safety**](/concepts/trust-score/safety), giving reviews evidence instead of opinions. [**Diamond**](/concepts/platform/diamond) runs Trust Score evaluations and adaptive [Red Team](/concepts/platform/diamond#red-team-in-diamond) evaluations. [**Dome**](/concepts/platform/dome) enforces [**Guardrails**](/concepts/defense/guardrail) at runtime, while [Darwin](/concepts/platform/darwin) uses reinforcement learning over production telemetry to continuously improve an [Agent's](/owner-guide/register-agents/what-is-an-agent) resilience.

Before any of that, **[Discover](/concepts/platform/discover)** finds the AI agents, models, and services actually running across your estate, including the ones nobody registered, and hands the ones worth governing to the Agent Registry.

## How Vijil Measures Trust

| Dimension | Question | Learn more |
| - | - | - |
| **Reliability** | Does the Agent do the right thing, consistently, under stress? | [Reliability](/concepts/trust-score/reliability) |
| **Security** | Can it resist abuse and protect sensitive data? | [Security](/concepts/trust-score/security) |
| **Safety** | Does it stay within policy and avoid harmful outcomes? | [Safety](/concepts/trust-score/safety) |

Start with the full model in [Trust Score](/concepts/trust-score/introduction).

## Build, Ship, Run, Evolve

Agent prototypes are everywhere, but most do not make it to production. To scale AI, enterprises face a critical choice: ship fast or ship resilient.

* Shipping fast increases failure rates and elevates risk; without objective trust evidence, Agents are in security limbo
* Generic red-teaming and guardrails do not ensure agents are safe for their specific context
* Failure insights do not feed back into development, leaving the trust gap open

<img src="https://mintcdn.com/vijil/t1_8aRtSIj494eFA/images/concepts/what-is-vijil/vijil_lifecycle.webp?fit=max&auto=format&n=t1_8aRtSIj494eFA&q=85&s=c48c864ff2723e7574fdad1e35ab3984" alt="Vijil lifecycle: Ship with Diamond, Run with Dome" style={{maxWidth: '500px', margin: '1.5rem auto', display: 'block'}} className="theme-aware-image" width="493" height="493" data-path="images/concepts/what-is-vijil/vijil_lifecycle.webp" />

**Vijil Diamond** Automates evaluation based on custom bespoke policies for business context and personas. Turns 'is this safe?' into an answerable question with an audit-ready Trust Score.

* Failure insights do not feed back into development, leaving the
  trust gap open

<img src="https://mintcdn.com/vijil/t1_8aRtSIj494eFA/images/concepts/what-is-vijil/vijil_lifecycle.webp?fit=max&auto=format&n=t1_8aRtSIj494eFA&q=85&s=c48c864ff2723e7574fdad1e35ab3984" alt="Vijil lifecycle: Ship with Diamond, Run with Dome" style={{maxWidth: '500px', margin: '1.5rem auto', display: 'block'}} className="theme-aware-image" width="493" height="493" data-path="images/concepts/what-is-vijil/vijil_lifecycle.webp" />

**Vijil Discover**
Finds the AI running in your estate and classifies it, so the
inventory you evaluate against is what is actually deployed rather
than what teams remembered to mention.

**Vijil Diamond**
Automates evaluation based on custom bespoke policies for
business context and personas. Turns 'is this safe?' into an
answerable question with an audit-ready Trust Score.

**Vijil Dome**
Enforces policies to protect and monitor Agents at runtime
through embedded Guardrails, blocking attacks in real-time and
logging detailed telemetry.

## Continue with Vijil

Pick where you work and what you need next:

<CardGroup cols={1}>
  <Card title="Concepts" icon="book-open-text" href="/concepts/trust-score/introduction">
    You want the mental model - [Trust Score](concepts/trust-score/introduction), evaluation components ([Harness](/concepts/evaluation-components/harness), [Scenario](/concepts/evaluation-components/scenario), [Probe](/concepts/evaluation-components/probe)), and Defense ([Guards](/concepts/defense/guard), [Guardrails](/concepts/defense/guardrail), [Detectors](/concepts/defense/detector)).

    **Start here** → [Trust Score](/concepts/trust-score/introduction), then explore this tab for deeper topics and the [Glossary](/concepts/glossary).
  </Card>

  <Card title="Agent Owner's Guide" icon="building-2" href="/owner-guide/getting-started/introduction">
    You use the Vijil console to [register Agents](/owner-guide/register-agents/registering-agents), [run Evaluations](/owner-guide/run-evaluations/running-evaluations), [configure Dome](/owner-guide/protect-in-production/configuring-guardrails), [monitor Dome Metrics](/owner-guide/protect-in-production/observability), and report to stakeholders.

    **Start here** → [Get started](/owner-guide/getting-started/introduction) in the console.
  </Card>

  <Card title="Agent Developer's Guide" icon="code" href="/developer-guide/getting-started/introduction">
    You integrate Vijil via SDKs & APIs, frameworks (e.g. LangChain, ADK), and production wiring.

    **Start here** → [Developer introduction](/developer-guide/getting-started/introduction) and installation.
  </Card>
</CardGroup>

### Quick Resources

* **Find what you have** → [Get started with Discover](/owner-guide/discover/introduction)
* **Evaluate in the UI** → [Get started](/owner-guide/getting-started/introduction)
* **Protect in production** → [Configuring Guardrails](/owner-guide/protect-in-production/configuring-guardrails)
* **Monitor protection** → [Dome Metrics](/owner-guide/protect-in-production/observability)


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.