https://github.com/pufflyai/kaset
Kaset is a toolkit to make your webapps agentic and customizeable by your users.
https://github.com/pufflyai/kaset
ai-agents coding-agents opfs plugin-system web web-agents
Last synced: 4 days ago
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Kaset is a toolkit to make your webapps agentic and customizeable by your users.
- Host: GitHub
- URL: https://github.com/pufflyai/kaset
- Owner: pufflyai
- License: mit
- Created: 2025-08-31T07:15:58.000Z (7 months ago)
- Default Branch: main
- Last Pushed: 2025-11-02T18:46:08.000Z (5 months ago)
- Last Synced: 2026-01-04T14:36:10.449Z (3 months ago)
- Topics: ai-agents, coding-agents, opfs, plugin-system, web, web-agents
- Language: TypeScript
- Homepage: https://kaset.dev
- Size: 3.28 MB
- Stars: 14
- Watchers: 0
- Forks: 1
- Open Issues: 13
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Security: SECURITY.md
- Agents: AGENTS.md
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README
**Kaset** [kaˈset] is an open source toolkit to build browser-first, agentic web apps.
[Docs](https://kaset.dev/) • [Playground](https://kaset.dev/playground) • [Issues](https://github.com/pufflyai/kaset/issues) • [MIT License](https://github.com/pufflyai/kaset/blob/main/LICENSE)
> Kaset is in early development, [join our discussions](https://github.com/pufflyai/kaset/discussions) and help shape it.
## Introduction
Programming has always been a _prelude_: developers write code, ship it, and users consume it.
Now imagine your average user being able to create plugins for your web app on the fly.
No coding experience required.
Directly _inside_ your app.
Curious? Check out our [documentation](https://kaset.dev).
## Contents
- Packages overview
- Local development
- Docs site
## Packages
> ### [@pstdio/kas](https://kaset.dev/packages/kas)
>
> A simple coding agent for the browser.
> ### [@pstdio/opfs-hooks](https://kaset.dev/packages/opfs-hooks)
>
> React hooks for working with the browser's Origin Private File System.
> ### [@pstdio/opfs-utils](https://kaset.dev/packages/opfs-utils)
>
> OPFS helpers: ls/tree, grep, safe file reads (text/binary/SVG/PDF), patch utilities.
> ### [@pstdio/opfs-sync](https://kaset.dev/packages/opfs-sync)
>
> Two‑way sync between OPFS and a remote S3 like provider (Supabase adapter included).
> ### [@pstdio/prompt-utils](https://kaset.dev/packages/prompt-utils)
>
> Prompt/JSON helpers for LLM workflows.
> ### [@pstdio/tiny-ai-tasks](https://kaset.dev/packages/tiny-ai-tasks)
>
> AI task building blocks: streaming LLM tasks with tool calls, a minimal agent loop, history truncation/summarization, and scratchpad utilities.
> ### [@pstdio/tiny-plugins](https://kaset.dev/packages/tiny-plugins)
>
> Plugin runtime for OPFS-backed plugins with manifest validation, command routing, and settings persistence.
> ### [@pstdio/tiny-tasks](https://kaset.dev/packages/tiny-tasks)
>
> Composable, interrupt-friendly workflows for TypeScript/JavaScript. Pause, persist, and resume long-running work.
> ### [@pstdio/tiny-ui](https://kaset.dev/packages/tiny-ui)
>
> Browser-first plugin runtime that compiles OPFS sources with esbuild-wasm and exposes host capabilities to plugin iframes.
> ### [@pstdio/tiny-ui-bundler](https://kaset.dev/packages/tiny-ui-bundler)
>
> Service worker bundler and runtime asset manager for Tiny UI plugins.
> ### [@pstdio/describe-context](https://kaset.dev/packages/describe-context)
>
> Generate an LLM‑ready Markdown context for a folder (library + CLI).
## Local development
Requires Node.js 22 (see Volta pin in `package.json`). From repo root:
```bash
npm i # install
npm run build # build all packages (lerna)
npm run test # run all tests
```
Helpful scripts:
- `npm run format` • `npm run format:check`
- `npm run lint`
- `npm run clean`
- `npm run reset:all` (clean → install → lint → build → test)
Per‑workspace examples:
```bash
npm run build --workspace @pstdio/opfs-utils
npm run test --workspace @pstdio/opfs-sync
```
## Docs site
VitePress site lives in `clients/documentation/`.
```bash
npm run start --workspace documentation # dev server
npm run build --workspace documentation # static build
```
## License
MIT © Pufflig AB. See `LICENSE`.