pi-deepseek-peak-alert

• 📦 npm · pi.dev · GitHub

A pi extension that sends desktop notifications when you're using DeepSeek models during peak pricing hours (2× regular rates).

DeepSeek introduced peak/valley pricing in July 2025. This extension makes sure you never accidentally burn double credits without knowing.

Screenshots

In-app TUI warnings (status bar + widget banner):

Desktop notifications:

Peak Hours (DeepSeek)

DeepSeek peak hours are fixed in UTC:

Slot	UTC
Morning peak	01:00 – 04:00
Afternoon peak	06:00 – 10:00

During these windows, all API billing items are doubled. The extension converts these to your local timezone automatically (see below).

What's your local peak time?

The default timezone is IST (UTC+5:30). To see peak hours in your timezone, change TIMEZONE_OFFSET_HOURS in the extension file. Common offsets:

Timezone	UTC Offset	TIMEZONE_OFFSET_HOURS	Peak (approx)
IST (India)	+5:30	5.5	6:30–9:30 AM & 11:30 AM–3:30 PM
EST (US Eastern)	-5	-5	8:00–11:00 PM & 1:00–5:00 AM
PST (US Pacific)	-8	-8	5:00–8:00 PM & 10:00 PM–2:00 AM
GMT (UK)	0	0	1:00–4:00 AM & 6:00–10:00 AM
CET (Central Europe)	+1	1	2:00–5:00 AM & 7:00–11:00 AM
CST (China)	+8	8	9:00 AM–12:00 PM & 2:00–6:00 PM
JST (Japan)	+9	9	10:00 AM–1:00 PM & 3:00–7:00 PM
AEST (Sydney)	+10	10	11:00 AM–2:00 PM & 4:00–8:00 PM

What It Does

Trigger	Notification
Switch to DeepSeek during peak	⚠️ "DEEPSEEK PEAK HOURS — 2× PRICE"
Peak hours begin while DeepSeek is active	⚠️ "DEEPSEEK PEAK HOURS STARTED" (background timer)
Every prompt sent during peak	⏰ "PEAK RATE — Prompt Sent"
Agent run completes	Shows cost with "(2× rate)" label if peak
DeepSeek errors	❌ Error notification

Plus a /deepseek-peak command to check status anytime.

Install

Via pi (recommended)

# From npm (once published)
pi install npm:pi-deepseek-peak-alert

# From git
pi install git:github.com/napender/pi-deepseek-peak-alert

# Local
pi install /path/to/pi-deepseek-peak-alert

Manual

Copy extensions/deepseek-notify.ts into ~/.pi/agent/extensions/.

Usage

The extension loads automatically. No flags, no config.

pi
/model          # pick a DeepSeek model
/deepseek-peak  # check peak status anytime

If you're in peak hours, you'll get a desktop notification immediately upon switching.

Platform Support

OS	Mechanism
macOS	osascript display notification (built-in)
Linux	notify-send (requires libnotify-bin)
Windows	PowerShell toast notifications

Configure Your Timezone

Open extensions/deepseek-notify.ts and change one line near the top:

// Change this to your UTC offset (e.g. -5 for EST, +1 for CET, +8 for CST)
const TIMEZONE_OFFSET_HOURS = 5.5; // IST (UTC+5:30)

All notifications and the /deepseek-peak command will then display times in your local timezone. Reload with /reload after editing.

Other Customizations

Same file, same /reload reload:

• Disable specific notifications — comment out the pi.on(...) blocks you don't want
• Change notification sound — macOS: sound name "Glass", Linux: -u critical
• Cost threshold — wrap agent_end notify in if (totalCost > 0.05)
• Custom timezone labels — change tzAbbr() return values

Edge Cases Covered

• ✅ Switch to DeepSeek mid-session during peak
• ✅ Session starts with DeepSeek default in peak
• ✅ Idle session — peak starts while you're away (timer catches it)
• ✅ Actively working — peak starts mid-run (timer notifies; billing label uses request-start time)
• ✅ Peak ends mid-run (correctly shows peak billing)
• ✅ Timer only fires when DeepSeek is active (silent on other models)

Uninstall

pi remove pi-deepseek-peak-alert

License

MIT