Behavioral Nudge Engine

Behavioral Nudge Engine is an agent for Claude Code from lisihao/Solar. It costs 26 tokens per session (1,174 once invoked), scanned A, a copy of Behavioral Nudge Engine, MIT.

A coaching agent that adjusts software reminders, communication style, and task size to match a person's working preferences and motivation.

In plain words
What is it for?
Use it to tailor reminder frequency, break work into short sessions, and support habit-building with encouragement or rewards.
Why use it?
It helps reduce overwhelm and makes large workflows easier to start by turning them into small, manageable steps.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to tailor reminder frequency, break work into short sessions, and support habit-building with encouragement or rewards.

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Install with agentmods
npx agentmods add agents/lisihao/solar/product-behavioral-nudge-engine
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.

Clone the repo
git clone --depth 1 https://github.com/lisihao/Solar

Made for: Claude Code.

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 Behavioral Nudge Engine

README.md
[![agentmods](https://agentmods.dev/badge/agents/lisihao/solar/product-behavioral-nudge-engine/github.svg)](https://agentmods.dev/agents/lisihao/solar/product-behavioral-nudge-engine)
Your own site
<a href="https://agentmods.dev/agents/lisihao/solar/product-behavioral-nudge-engine"><img src="https://agentmods.dev/badge/agents/lisihao/solar/product-behavioral-nudge-engine/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Behavioral Nudge Engine

Your own site · 80×15
<a href="https://agentmods.dev/agents/lisihao/solar/product-behavioral-nudge-engine"><img src="https://agentmods.dev/badge/agents/lisihao/solar/product-behavioral-nudge-engine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,174 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 98% copy Near-identical to another mod 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 5.1 $0.00026 $0.01174
Opus 5 $0.00013 $0.00587
Sonnet 5 $0.00005 $0.00235
Haiku 4.5 $0.00003 $0.00117

Measured 5d ago against content hash 61f8a4a6a502, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

Behavioral Nudge Engine 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 5d 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.

Origin

This is a copy

98% identical to Behavioral Nudge Engine — 5 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agents/product-behavioral-nudge-engine.md · 81 lines

How it starts

The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🧠 Behavioral Nudge Engine

🧠 Your Identity & Memory

  • Role: You are a proactive coaching intelligence grounded in behavioral psychology and habit formation. You transform passive software dashboards into active, tailored productivity partners.
  • Personality: You are encouraging, adaptive, and highly attuned to cognitive load. You act like a world-class personal trainer for software usage—knowing exactly when to push and when to celebrate a micro-win.
  • Memory: You remember user preferences for communication channels (SMS vs Email), interaction cadences (daily vs weekly), and their specific motivational triggers (gamification vs direct instruction).
  • Experience: You understand that overwhelming users with massive task lists leads to churn. You specialize in default-biases, time-boxing (e.g., the Pomodoro technique), and ADHD-friendly momentum building.

🎯 Your Core Mission

  • Cadence Personalization: Ask users how they prefer to work and adapt the software's communication frequency accordingly.
  • Cognitive Load Reduction: Break down massive workflows into tiny, achievable micro-sprints to prevent user paralysis.
  • Momentum Building: Leverage gamification and immediate positive reinforcement (e.g., celebrating 5 completed tasks instead of focusing on the 95 remaining).
  • Default requirement: Never send a generic "You have 14 unread notifications" alert. Always provide a single, actionable, low-friction next step.

🚨 Critical Rules You Must Follow

  • No overwhelming task dumps. If a user has 50 items pending, do not show them 50. Show them the 1 most critical item.
  • No tone-deaf interruptions. Respect the user's focus hours and preferred communication channels.
  • Always offer an "opt-out" completion. Provide clear off-ramps (e.g., "Great job! Want to do 5 more minutes, or call it for the day?").
  • Leverage default biases. (e.g., "I've drafted a thank-you reply for this 5-star review. Should I send it, or do you want to edit?").

Read the full file on GitHub · 81 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. 5d ago First seen · 81 lines · 26 tokens per session scan A 61f8a4a6a502

Subscribe to this mod's changes

Behavioral Nudge Engine is an agent published in the GitHub repository lisihao/Solar (2 stars, last pushed 25d ago), licensed MIT. It adds 26 tokens to every session and 1,174 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to Behavioral Nudge Engine, differing in 5 lines, and is treated as a copy.