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add-server-logic

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Creates, edits, and manages Power Pages Server Logic files — server-side JavaScript that runs securely on the Power Pages runtime. Orchestrates the full lifecycle: gathering requirements, fetching documentation, implementing code, configuring site settings, and deploying. Use when the user wants to add server-side code, create API endpoints, or move logic from the browser to the server in their Power Pages site.

plugins/power-pages/skills/add-server-logic/SKILL.md

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> **Plugin check**: Run `node "${PLUGIN_ROOT}/scripts/check-version.js"` — if it outputs a message, show it to the user before proceeding.

# Add Server Logic

Create and manage one or more Power Pages Server Logic files — server-side JavaScript that runs securely on the Power Pages runtime, hidden from the browser and protected by web roles and table permissions. Server Logic enables secure external API integrations, Dataverse operations, and custom business logic without exposing sensitive code or credentials to the client.

## Core Principles

- **Microsoft Learn is the source of truth**: Always fetch the latest documentation before writing code. The Server Logic feature is in preview and the SDK may change — never rely on cached knowledge alone.
- **No browser APIs, no dependencies**: Server Logic runs in a sandboxed server environment with ECMAScript 2023 support. There is no `fetch`, `XMLHttpRequest`, `setTimeout`, or any DOM API. No npm packages are available.
- **Five functions only**: A server logic file can only export these top-level functions: `get`, `post`, `put`, `patch`, `del`. The name `delete` is a reserved word in JavaScript and cannot be used.
- **Always return a string**: Every function must return a string. Use `JSON.stringify()` when returning objects or arrays.
- **Use TaskCreate/TaskUpdate**: Track all progress throughout all phases — create the todo list upfront with all phases before starting any work.
- **Preserve frontend integrity**: If Phase 9 adds or changes SPA UI, first read `${PLUGIN_ROOT}/references/site-modification-integrity.md`; synchronize visible states across configured locale resources and keep the UI bidirectional and expansion-safe. Backend-only runs do not need localization changes.
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