pi-daily-cost

Daily spend tracker for the Pi coding agent. Shows your total API cost across all sessions today in the footer status bar — not just the current session.

today: $1.24

Why

Pi's built-in footer shows per-session cost. If you run multiple sessions in a day (different projects, resuming earlier sessions, etc.) there's no easy way to see your total daily spend at a glance. This extension adds that.

Install

pi install npm:pi-daily-cost

How it works

On session start, the extension scans all JSONL session files under ~/.pi/agent/sessions/ for today's date and sums assistant message costs. New costs in the active session are accumulated live via the message_end event. The footer updates in real time as you work.

Handles:

• Multiple sessions across different projects
• Resumed or forked sessions (no double-counting)
• Sessions that span midnight (costs are attributed to the local date of each message)
• Fresh installs with no prior sessions

Display

The status appears in your footer as today: $X.XX. Works best alongside pi-powerline-footer, which styles footer status segments.

Cost format:

• $0.00 — nothing spent yet
• <$0.001 — sub-millicent amounts
• $0.0423 — fractions of a cent
• $0.142 — cents range
• $1.24 — dollar range

Notes

• Costs are read from Pi's local session files — no network calls, no external tracking
• If a session file is unreadable or malformed, it's skipped silently
• Branched/abandoned conversation paths are included in the cost total (the API cost was incurred either way)