activity-patterns

activity-patterns is a skill for Claude Code, Codex from AfterRealm/father-time. It costs 70 tokens per session (591 once invoked), scanned A, original, MIT.

A report of your Claude Code session-start patterns over time, using recorded dates, times, and weekdays.

In plain words
What is it for?
Finding your busiest and quietest hours, comparing weekdays with weekends, identifying your most active day, and seeing how often your sessions overlap with peak hours.
Why use it?
It shows when you usually work instead of making you rely on memory, including whether your schedule resembles a night owl, early bird, business-hours, all-hours, or weekend pattern.

Skill for Claude CodeCodex

Part of the father-time plugin — 9 skills, 1 agent, 2 hooks shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/afterrealm/father-time/activity-patterns
Any agent
npx skills add AfterRealm/father-time --skill activity-patterns
Clone the repo
git clone --depth 1 https://github.com/AfterRealm/father-time

Made for: Claude Code, Codex.

Or install father-time, the plugin that ships this one along with the rest of its 9 skills, 1 agent, 2 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for activity-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/afterrealm/father-time/activity-patterns.svg)](https://agentmods.dev/skills/afterrealm/father-time/activity-patterns)
Your own site
<a href="https://agentmods.dev/skills/afterrealm/father-time/activity-patterns"><img src="https://agentmods.dev/badge/skills/afterrealm/father-time/activity-patterns.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 591 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00070 $0.00591
Opus 5 $0.00035 $0.00296
Sonnet 5 $0.00014 $0.00118
Haiku 4.5 $0.00007 $0.00059

Measured 4d ago against content hash 492754c59851, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

activity-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/activity-patterns/SKILL.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Activity Patterns

Analyze the user's Claude Code usage patterns over time to provide personalized scheduling insights.

Data Source

Read ${CLAUDE_PLUGIN_DATA}/activity_patterns.json — an array of session start records:

[
  {"date": "2026-03-26", "time": "22:15", "weekday": "Wednesday", "hour": 22},
  {"date": "2026-03-27", "time": "08:10", "weekday": "Thursday", "hour": 8}
]

The SessionStart hook appends an entry each time a new session begins. Max 200 entries retained.

Analysis to Perform

Time Distribution

  • Count sessions by hour of day (0-23)
  • Find the peak activity hours
  • Identify dead hours (when they never work)

Day Distribution

  • Sessions per weekday
  • Weekday vs weekend ratio
  • Most active day of the week

Pattern Classification

Based on the data, classify the user:

Pattern Criteria
Night Owl >50% of sessions between 8pm-4am
Early Bird >50% of sessions between 5am-10am
Business Hours >50% of sessions between 9am-5pm
All-Hours No dominant time block
Weekend Warrior >30% of sessions on weekends

Peak Hour Overlap

  • What percentage of their sessions fall during peak hours?
  • Are they naturally avoiding peak, or hitting it head-on?
  • Personalized recommendation based on their actual pattern

Response Format

Activity Profile: [N] sessions analyzed over [date range]

Schedule: [Night Owl / Early Bird / Business Hours / All-Hours]
Most active: [day of week] at [hour range]
Least active: [day/hour]
Peak hour overlap: [X]% of your sessions hit peak hours

[Insight]: [Personalized observation, e.g., "You naturally work off-peak —
your night schedule dodges throttling completely."]

[Recommendation]: [Actionable advice based on pattern]

Privacy Note

Activity patterns are stored locally in ${CLAUDE_PLUGIN_DATA}. Nothing is sent anywhere. The data stays on the user's machine and is only used to provide personalized scheduling insights.

Read the full file on GitHub · 75 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 75 lines · 70 tokens per session scan A 492754c59851

Subscribe to this mod's changes

activity-patterns is a skill published in the GitHub repository AfterRealm/father-time (6 stars, last pushed 4mo ago), licensed MIT. It adds 70 tokens to every session and 591 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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