---
title: "Nimbus"
section: open-source
description: "AT Protocol repository sync with Cloudflare Workers built on Tap"
tags: ["at-protocol", "bluesky"]
created: 2026-01-18T11:02:00Z
updated: 2026-01-18T11:03:00Z
cid: bafkreiejevjs53vnyzyde3lniczhc2tnqvo5xa5s35ja3pvt6xbhs43o74
html: https://iammatthias.com/open-source/1768762943567-nimbus
---

# Nimbus

[REPO](https://github.com/iammatthias/nimbus)

A Cloudflare Worker implementation of [TAP](https://github.com/bluesky-social/atproto/tree/main/packages/tap) (Repository Sync) for the AT Protocol, using Durable Objects for state management.

Nimbus handles firehose connections, backfill, and filtering to provide simple JSON events for AT Protocol repositories.

---

## Related

- [Notes on using a PDS as Content Infrastructure](https://iammatthias.com/posts/1767505149657-notes-on-using-a-pds-as-content-infrastructure.md): Content addressing with normal web requests, identity baked in, delivery over boring HTTPS.
- [Pure Internet: no-html](https://iammatthias.com/posts/1740682611811-pure-internet-no-html.md): A plain Markdown file hosted on Bluesky's blob storage and rendered directly by the browser.
- [Pure Internet: Bluesky](https://iammatthias.com/posts/1732585567703-pure-internet-bluesky.md): Static-site hosting on Bluesky's AT Protocol using content-addressed blob storage.
- [Pure Internet](https://iammatthias.com/posts/1731955749292-pure-internet.md): Pure Internet is a running collection of small experiments in publishing with fewer layers.
- [AI-Legion on Bluesky](https://iammatthias.com/posts/1681369200000-ai-legion-on-bluesky.md): I gave AI-Legion the Bluesky agent types and asked it to extend itself into the open social protocol.