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pi-mono-context

pi-mono-context adds a Claude Code-style /context command to Pi for printing the current session's context-window usage in the conversation without adding that report to future LLM context.

Install

pi install npm:pi-mono-context

Or load locally while developing:

pi -e /path/to/pi-extensions/extensions/context/index.ts

Usage

/context

The command prints a display-only custom message with:

  • a dense colored grid representing used vs free context
  • current model and total token usage
  • estimated usage by category
  • session stats such as turns, message count, cache read/write, and cost
  • estimated extension allocation grouped by source/package
  • active tool and slash-command sections when Pi exposes them cheaply

The printed report is filtered out by the extension's context hook before LLM calls, so it is visible in the transcript but does not consume future context window.

Example

Context Usage
     ⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶   Opus 4.7 (1m context)
     ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶   claude-opus-4-7[1m]
     ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶   30.6k/1m tokens (3%)
     ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶
     ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶   Estimated usage by category
     ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶   ⛁ System prompts: 9k tokens (0.9%)
     ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶   ⛁ System tools: 13k tokens (1.3%)
                                               ⛁ Messages: 13 tokens (0.0%)
                                               ⛶ Free space: 969.4k tokens (96.9%)

Extension allocation

The report includes an Extension allocation · estimated section when Pi exposes source metadata. Allocation is grouped from active tool definitions, extension/skill commands, and custom messages by sourceInfo or customType.

     Extension allocation · estimated
     ├ figma: 4.8k tokens (0.5%) · tools 4.2k · commands 600 · custom 0
     ├ linear: 3.1k tokens (0.3%) · tools 2.7k · commands 400 · custom 0
     └ context: 0 tokens (0.0%) · tools 0 · commands 0 · custom 0

This is an estimate, not exact provider-tokenized accounting.

Color palette

  • ⛁ System prompts: grey
  • ⛁ System tools: grey
  • ⛁ Custom agents: light blue
  • ⛁ Memory files: orange
  • ⛁ Skills: yellow
  • ⛁ Messages: purple
  • ⛶ Free space: grey

Notes

Pi exposes the real total context usage via ctx.getContextUsage(). The category breakdown is a best-effort estimate based on session entries, system prompt text, active tool definitions, and simple token heuristics. Exact provider tokenization may differ.