PI Extensions

PI Extensions is my collection of custom Pi extensions for use in the Pi coding agent. This page currently covers two of them: one for per-model behavior and one for session continuity.

pi-model-prompt

• GitHub: lukemelnik/pi-model-prompt
• npm: @lukemelnik/pi-model-prompt
• What it’s for:
  • saving a custom prompt per provider/model pair
  • editing, showing, and clearing the active model’s prompt from Pi commands
  • keeping prompt tweaks available across sessions and projects
• Why I created it:
  • after moving between Claude, Codex, and Pi, I wanted different behavioral corrections for each model instead of one generic system prompt
  • Codex often over-engineered solutions and added complexity that was not necessary
  • Claude often rushed into implementation instead of slowing down, checking with me, and taking a more measured approach
  • Pi saves user and assistant messages when it saves a session, but it does not store the system prompt, which means you can change that prompt independently and make a per-model prompt extension possible

pi-session-recap

• GitHub: lukemelnik/pi-session-recap
• npm: @lukemelnik/pi-session-recap
• What it’s for:
  • showing a one-line recap above the editor so it is easier to resume a long-running Pi session
  • refreshing the recap after agent turns when Pi goes idle
  • choosing the model used for recaps and configuring the refresh delay
• Why I created it:
  • I liked the short recap Claude Code shows when you come back to a terminal session later and need to remember what a tmux pane was doing
  • I wanted that same continuity in Pi
  • the interesting part of the extension was making the timing and model behavior configurable instead of hardcoding a single recap workflow