# Contract: Build Version Display

Version: 1.1

## Rule

The build version **must** be visible in the footer on every page of the web application,
so users and support staff can identify exactly which version is running.

See `README.md` for implementation snippets.

## Requirements

- The version is shown in the footer on **all** pages, including error pages (404, 500, etc.).
- The version string is injected at **build time** — it is never hardcoded in source and never fetched at runtime.
- The version value comes from a single authoritative source (e.g. `package.json`, `version.go`, a CI environment variable). It is not duplicated manually.
- Format: any human-readable string that uniquely identifies the build — a semver tag, a git commit SHA, or a combination (e.g. `1.4.2`, `1.4.2-abc1234`, `abc1234`).
- The version text must be legible but visually subordinate — use a muted color and small font size so it does not compete with page content.

## What is NOT allowed

- Omitting the version from any page, including error pages.
- Fetching the version from an API endpoint at runtime (network dependency for a static value).
- Hardcoding a version string in source code.
- Storing the version in more than one place.