pi-anthropic

Anthropic system prompt sanitiser extension for pi.

Install

pi install npm:@ravshansbox/pi-anthropic

Add -l to install it in project settings.

Usage

Pi loads the extension from ./index.ts and sanitises outgoing Anthropic system prompts for Claude models that use the Anthropic Messages API before the provider request is sent.

For example, if a Claude request contains the known problematic documentation lines in the system text, the extension removes those lines while leaving the rest of the prompt unchanged.

It also adds Anthropic's server-side web_search and web_fetch tools to Claude requests. A tool is skipped if the request already has a tool with the same name. Pi does not show or keep the search and fetch results; you only see Claude's reply.

./quota.ts shows the used Anthropic quota in the footer when the active model is from Anthropic and pi runs in the TUI, e.g. 7% 1h29m · 33% 4d (5-hour window first, then 7-day window, each with time until reset).

• Calls the Anthropic usage endpoint once on session start, then reads the quota from the rate limit headers of each Anthropic response
• Refreshes the Anthropic OAuth token in ~/.pi/agent/auth.json when needed and writes it back
• Runs pi -p hi with the active model when a quota window resets, then reloads the quota (only reloads when the active model is not from Anthropic)
• Appends errors to ~/.pi/agent/pi-anthropic.log
• Does nothing outside the TUI (RPC, JSON and print modes, including subagents)

Development

npm install
npm run check