pi-model-prompt — custom prompts per model in Pi

A Pi extension that stores a custom prompt for each provider/model and applies the active model's prompt to future requests.

pi install npm:@lukemelnik/pi-model-prompt

/model-prompt edit

Features

• Custom prompt per model — keep separate instructions for each Pi provider/model pair.
• Global storage — reuse the same model prompts across sessions and projects.
• Interactive editing — create or update the active model's custom prompt in Pi's editor.
• Read and clear commands — inspect or delete the active model's custom prompt with slash commands.
• Agent-manageable tools — let the model inspect or edit its own custom prompt only when explicitly requested.
• Visible state — show a status indicator when the active model has a non-empty custom prompt.

Install

Install from npm:

pi install npm:@lukemelnik/pi-model-prompt

Install project-locally instead of globally:

pi install npm:@lukemelnik/pi-model-prompt -l

Install from GitHub or a local checkout:

pi install git:github.com/lukemelnik/pi-model-prompt
pi install /absolute/path/to/pi-model-prompt

Quick Start

Install the package, open Pi, then create a custom prompt for the currently selected model:

/model-prompt edit

Save the text in the editor. The custom prompt is applied the next time a user prompt starts; it does not change a response already in progress.

Inspect or remove the custom prompt later:

/model-prompt show
/model-prompt clear

Commands

Command	Description
/model-prompt	Open the editor for the active model's custom prompt.
/model-prompt edit	Same as /model-prompt.
/model-prompt show	Show the active model's custom prompt and file path.
/model-prompt clear	Delete the active model's custom prompt after confirmation.

Agent Tools

This package registers tools that Pi can use when explicitly asked to inspect or modify custom model behavior.

Tool	Description
model_prompt_show	Show the current custom prompt for the active model.
model_prompt_edit	Edit the current custom prompt with exact text replacements. Creates a new file with one edit whose oldText is an empty string.

Tool changes apply on the next user prompt. Ask the agent to show the current custom prompt before editing unless the exact current contents are already known.

Storage

Custom prompts are stored under the Pi agent directory:

~/.pi/agent/model-prompts/<provider>/<encoded-model-id>.md

For example, a model ID containing / is URL-encoded in the filename. Empty or missing files are ignored.

Manage the Package

pi list
pi config
pi update npm:@lukemelnik/pi-model-prompt
pi remove npm:@lukemelnik/pi-model-prompt

If the package was installed project-locally, pass -l to pi remove:

pi remove npm:@lukemelnik/pi-model-prompt -l

Requirements

• Pi with package support.
• An active Pi model. No extra API key is required beyond the model already selected in Pi.

Development

Maintainer setup, type checking, and release commands are documented in docs/development.md.

License

MIT