shuntkit
Copyright 2026 melonkernel

This product is a derivative work of the "shunt" plugin from
spotify/portal-ai-plugins (https://github.com/spotify/portal-ai-plugins),
Copyright Spotify AB, licensed under the Apache License, Version 2.0.

The hook design (block whole-file reads over a line threshold and redirect
to a bulk-reader skill), the bulk-reader and code-writer skill concepts, the
prompt shapes, and the hook evaluation cases originate from that project.
The transport layer was rewritten to use the Claude Code CLI or the
Anthropic API in place of the Spotify Portal / AiKA backend.

The engineering write-up that motivated the original plugin:
https://engineering.atspotify.com/2026/9/portal-by-spotify-cut-my-claude-code-token-usage-by-90
