father-time

Father Time — Time-Aware Agent for Claude Code

Claude Code doesn't know what time it is. Father Time fixes that.

A plugin that gives Claude persistent time awareness — peak hour warnings, session tracking, rate limit forecasting, activity pattern learning, focus timers, and daily briefings. Built for the post-throttle era.

Why

On March 26, 2026, Anthropic announced adjusted session limits during peak hours. Your 5-hour session limits now drain faster on weekdays between 5am-11am PT. Father Time helps you work around that.

But it's more than peak hours. Claude has no concept of time between prompts. It doesn't know if you've been working for 10 minutes or 10 hours. It doesn't know if it's Monday morning or Saturday midnight. Father Time gives it that context on every single prompt.

What's Included

Hook: Time Injection

Every prompt is automatically injected with:

• Current local time with timezone
• Pacific Time reference
• Peak hour status (PEAK / OFF-PEAK) with countdown
• Session duration

Agent: Father Time

A time-aware assistant that can answer questions about scheduling, pacing, and work patterns.

Skills

Skill	What It Does
/father-time:time-menu	Interactive menu — pick from all capabilities below via a guided selector.
/father-time:peak-hours	Am I in Anthropic's throttle window? Full timezone table included.
/father-time:session-timer	How long has this session been running? Checkpoint suggestions at milestones.
/father-time:daily-brief	Morning briefing — peak status, schedule outlook, activity insights, work recommendations.
/father-time:pace-check	Rate limit forecasting. Estimates runway based on session duration and work intensity.
/father-time:focus-mode	Focus timer with presets (pomodoro 25m, deep-work 90m, sprint 45m, marathon 3h). Non-intrusive.
/father-time:activity-patterns	Analyze your work patterns over time. Night owl? Early bird? How much do you overlap with peak hours?
/father-time:session-health	Session JSONL size, context window usage estimate, compaction proximity, and rate limit status.
/father-time:context-budget	Estimate the token cost of reading a file or directory before doing it. Includes per-model cost comparison (Opus 4.7 / 4.6 / Sonnet 4.6 / Haiku 4.5), Opus 4.7 tokenizer headroom, and 1M-context notes.

Peak Hours by Timezone

Anthropic's throttle window: Weekdays 5:00 AM – 11:00 AM Pacific Time

Timezone	Peak Window
PT (Pacific)	5:00 AM – 11:00 AM
MT (Mountain)	6:00 AM – 12:00 PM
CT (Central)	7:00 AM – 1:00 PM
ET (Eastern)	8:00 AM – 2:00 PM
GMT/UTC	1:00 PM – 7:00 PM
CET (Central Europe)	2:00 PM – 8:00 PM
IST (India)	6:30 PM – 12:30 AM
JST (Japan)	10:00 PM – 4:00 AM
AEST (Australia East)	11:00 PM – 5:00 AM
NZST (New Zealand)	1:00 AM – 7:00 AM

Install

Add the AfterRealm marketplace and install:

claude plugin marketplace add AfterRealm/marketplace
claude plugin install father-time@afterrealm

Then restart Claude Code. All skills will be available globally.

Also available: Blunt Cake — brutal, funny code reviewer with 7 modes and 6 personalities. Both plugins live in the AfterRealm marketplace.

Requirements

• Claude Code v2.1.78+
• Python 3 (for hook scripts)

Token Cost

Father Time is nearly free to run.

Component	Token Cost	When
Time injection hook	~40 tokens/prompt	Every prompt (passive)
Skills	300-800 tokens	Only when you invoke them
Agent	~1,500 tokens	Only when spawned
Python scripts	0 tokens	Run locally, no API calls

Passive cost: ~40 tokens per prompt for the time/peak/session string. Over a 100-prompt session, that's ~4,000 tokens — 0.4% of a 1M context window. Essentially invisible.

Skills and the agent only consume tokens when you explicitly call them. The hook scripts run as local Python processes with zero API cost.

Privacy

All data stays local. Activity patterns are stored in ${CLAUDE_PLUGIN_DATA} on your machine. Nothing is transmitted anywhere.

License

MIT