AstralBeam open-sources an embeddable Cursor-style chat sidebar and agent backend for web apps
mintuhouse · reddit · 2026-11-13
AstralBeam is an embeddable, Cursor-style assistant for existing web apps: the SDK provides the chat UI while the backend runs the agent loop, streaming, conversation history, files, and per-customer token/spend limits. You register tools connecting the agent to your app's APIs or state, and can render your own UI components in replies. The demo is a task app where the agent calls an app tool and an interactive task card appears in the conversation.
Ships as a React SDK and a plain JS embed; SDK is MIT, the platform AGPL-3.0-only, self-hostable with your own model-provider keys. Source, quickstart and self-hosting docs are on GitHub.
More from coding & agent
- Agent coding burns 1-2B tokens a day: Reddit dev does the math on a $1,000+/month API bill — JamesGooning · 2026-11-13
- How a 300k-line Claude Code game stayed shippable: 57% of 1,644 commits AI-co-authored — Tommyruin · 2026-11-13
- Lost updates in four MCP servers: GitHub, Grafana, PostHog and Kubernetes — Miserable_Bed_219 · 2026-11-13
- A 'verified' email can still be from a stranger: DMARC alignment for agents — Spacesh1psoda · 2026-11-13
- Vercel UI SDK adds findable option so Ctrl+F works with virtualized lists — shuding · 2026-11-13
- Investor Match adds an MCP endpoint so agents can run investor outreach and deck teardowns — MartinGTobias · 2026-11-13