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

# System overview

> Understand how EyeParity connects source workplans, runtime state, proof artifacts, and reviewer decisions.

EyeParity separates engineering source, runtime observation, proof artifacts, and reviewer-facing presentation. A trustworthy result requires those planes to agree. Availability in one plane does not substitute for correctness in another.

## Four planes

| Plane    | Responsibility                                                        | Typical identity                                 |
| -------- | --------------------------------------------------------------------- | ------------------------------------------------ |
| Source   | Owns workplans, acceptance criteria, and implementation history       | Repository plus workplan path                    |
| Runtime  | Serves the application and reports current route or service state     | Environment, tenant, route, and build identity   |
| Evidence | Stores immutable captures, manifests, hashes, and corroboration       | Artifact URL plus proof-set identity             |
| Review   | Resolves the source and evidence into a production inspection surface | Workplan route plus authenticated tenant context |

## Request path

<Steps>
  <Step title="Resolve the owner">
    Select the canonical repository and tenant before reading workplan content or evidence.
  </Step>

  <Step title="Observe the current runtime">
    Capture the requested route after the relevant implementation and deployment event.
  </Step>

  <Step title="Build the proof package">
    Bind visible evidence to deterministic route, build, viewport, and artifact facts.
  </Step>

  <Step title="Render for review">
    Present the workplan and its current evidence through the production EyeParity surface.
  </Step>
</Steps>

## Fail-closed boundaries

EyeParity keeps a claim open when the source resolver cannot identify the requested workplan, the runtime build is stale, an artifact is unavailable, or evidence predates a relevant incident. A rendered shell with missing workplan content is an observable failure state rather than completion.

<Note>
  The production reviewer route is [app.eyeparity.com](https://app.eyeparity.com). Local runtimes are useful for development and diagnostics, but they do not replace production reviewer acceptance.
</Note>