> For the complete documentation index, see [llms.txt](https://rc.sunbird.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rc.sunbird.org/use/developer-guide.md).

# Developer Guide

Building on, configuring, and operating Sunbird RC.

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Working with Source Code</strong></td><td>Compile and run the registry from <code>sunbird-rc-core</code>, and switch feature services on.</td><td><a href="/use/developer-guide/working-with-source-code.md">Working with Source Code</a></td></tr><tr><td><strong>Environment Variable Reference</strong></td><td>Every registry-core and service environment variable, by service.</td><td><a href="/use/developer-guide/environment-variable-reference.md">Environment Variable Reference</a></td></tr><tr><td><strong>Configuration Reference</strong></td><td>Frontend, proxy, audit, notification and view-template config files.</td><td><a href="/use/developer-guide/configuration-reference.md">Configuration Reference</a></td></tr><tr><td><strong>Schema Setup</strong></td><td>Define entities, write schemas, and configure <code>_osConfig</code>.</td><td><a href="/use/developer-guide/schema-setup.md">Schema Setup</a></td></tr><tr><td><strong>Setup Backend</strong></td><td>Where the repos, deployment files and schema directory live.</td><td><a href="/use/developer-guide/setup-backend.md">Setup Backend</a></td></tr><tr><td><strong>Setup Frontend</strong></td><td>Run and configure the Angular registry UI.</td><td><a href="/use/developer-guide/setup-frontend.md">Setup Frontend</a></td></tr><tr><td><strong>Backup and Restore</strong></td><td>PostgreSQL and Cassandra backup methods and restore paths.</td><td><a href="/use/developer-guide/backup-and-restore.md">Backup and Restore</a></td></tr><tr><td><strong>Generic IAM</strong></td><td>Use any OAuth2-compliant identity layer, not just Keycloak.</td><td><a href="/use/developer-guide/generic-iam.md">Generic IAM</a></td></tr><tr><td><strong>Metrics</strong></td><td>Emit and aggregate registry events via Kafka or file.</td><td><a href="/use/developer-guide/metrics.md">Metrics</a></td></tr><tr><td><strong>Custom Keycloak Build</strong></td><td>Build the Sunbird RC Keycloak image with toggleable NONCE validation.</td><td><a href="/use/developer-guide/custom-keycloak-build.md">Custom Keycloak Build</a></td></tr><tr><td><strong>VC Verification Module</strong></td><td>Drop-in QR scanning and VC verification for Angular frontends.</td><td><a href="/use/developer-guide/vc-verification-module.md">VC Verification Module</a></td></tr></tbody></table>


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