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Open-source plugin · Third-party

fast-jev-compaction

Claude Code plugin and npm library that asks Jev which tool calls to keep, instead of summarizing the transcript.

Source repository

Runnable
Runnable if you have Node, Claude Code function hooks, and a TypeSafe key. The npm API is also callable from your own code.
Keys
TYPESAFE_API_KEY is required for live Jev calls. This hub never stores or reads that key.
Platforms
Node.js, Claude Code plugin, npm library
Primitives
noul
npm install fast-jev-compaction

Most compaction pipelines ask a language model to summarize old turns. This project refuses that path: user and assistant text stay verbatim, and Jev only decides which tool calls and tool results can drop or truncate.

The repository is both an npm package (fast-jev-compaction) and a Claude Code plugin. The plugin adapter lives in hooks/ and calls POST https://api.typesafe.ai/v1/systemone with model defaulting to jev-latest.

Use this when a long coding session is losing exact file paths or error text to summary. Do not treat star counts as a quality guarantee; inspect the keep/drop thresholds before pointing it at a private repo.

Caveats

  • Third-party project, not a TypeSafe product.
  • Needs CLAUDE_CODE_ENABLE_FUNCTION_HOOKS=1 for the plugin path.
  • Sends conversation state to the official TypeSafe endpoint.

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