agent4.double.finance

# Pillar > Pillar is an open-source AI copilot SDK for SaaS — a product assistant that executes tasks, not just answers questions. Users say what they want, and Pillar uses your UI to make it happen — navigating pages, pre-filling forms, and calling APIs client-side. - Pillar executes multi-step tasks in the user's browser — navigating pages, pre-filling forms, and calling APIs on behalf of the user. - Runs client-side with the user's existing browser session. No proxy servers or token forwarding required. - Available as vanilla JavaScript, React, Vue 3, and Angular SDKs. - Uses your existing docs and content as context for answering questions (supports websites, uploaded files, and cloud storage). - npm packages: @pillar-ai/sdk (core), @pillar-ai/react, @pillar-ai/vue, @pillar-ai/angular - Pillar is NOT a help center, knowledge base, or support ticketing system. It is a copilot SDK that takes actions inside your app. ## Docs - [Introduction](https://trypillar.com/docs/get-started/what-is-pillar): Overview of what Pillar is and the problems it solves - [How It Works](https://trypillar.com/docs/get-started/what-is-pillar): Architecture and client-side execution model - [React Quickstart](https://trypillar.com/docs/get-started/quickstart): Get started with React or Next.js in 5 minutes - [Vanilla JS Quickstart](https://trypillar.com/docs/get-started/quickstart): Get started without a framework - [Tools Guide](https://trypillar.com/docs/guides/tools): Define what the copilot can do in your app - [Context Guide](https://trypillar.com/docs/guides/context): Provide runtime context to the copilot - [Knowledge Base](https://trypillar.com/docs/knowledge-base/overview): Provide your existing docs and content as context for the copilot - [Human Escalation](https://trypillar.com/docs/guides/human-escalation): Hand off to a human when the copilot can't complete a task - [Inline UI](https://trypillar.com/docs/guides/inline-ui): Render custom UI components in copilot res