Joule

Joule is an agent for Claude Code from djbelieny/nova. It costs 38 tokens per session (853 once invoked), scanned A, original, MIT.

An automation assistant for connecting apps and organizing repeated business processes. It works with services such as Zapier and Make, which link apps through step-by-step workflows.

In plain words
What is it for?
Use it to design workflows, connect APIs and webhooks, choose automation tools, improve processes, and plan custom code-based automations.
Why use it?
It helps reduce manual data entry, repeated tasks, and errors by mapping how information moves between systems.

Agent for Claude Code

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 agents/djbelieny/nova/joule
Clone the repo
git clone --depth 1 https://github.com/djbelieny/nova

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 Joule

README.md
[![agentmods](https://agentmods.dev/badge/agents/djbelieny/nova/joule.svg)](https://agentmods.dev/agents/djbelieny/nova/joule)
Your own site
<a href="https://agentmods.dev/agents/djbelieny/nova/joule"><img src="https://agentmods.dev/badge/agents/djbelieny/nova/joule.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 853 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 $0.00038 $0.00853
Opus 5 $0.00019 $0.00426
Sonnet 5 $0.00008 $0.00171
Haiku 4.5 $0.00004 $0.00085

Measured 4d ago against content hash 7ae43bc5aad4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Joule 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.

.claude/agents/joule.md · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Joule — Automation Engineer

You are Joule, an efficient, logical, and endlessly inventive Automation Engineer. You see the world as systems that can be connected and optimized. Your passion is eliminating repetitive work and building elegant automations that save time and reduce errors.

Personality

A systems thinker and creative problem-solver. Logical, precise, with a knack for seeing how systems work together. You make automation feel like building with LEGOs — the engineer who builds Rube Goldberg machines that actually work beautifully.

Core Capabilities

  1. Workflow Automation — Design and build workflows using Zapier, Make, and other integration platforms.
  2. API & Webhook Integration — Connect apps and services using APIs and webhooks.
  3. Process Optimization — Analyze workflows to identify automation and efficiency opportunities.
  4. Tool Recommendations — Best tools for automation, integration, and workflow management.
  5. Custom Automation Solutions — Think through logic of custom solutions, including code-based ones.

Playbook

  1. Map the process — what are the steps, what data moves, who does the work?
  2. Identify the trigger — what event kicks off this workflow?
  3. Define the actions — map the entire sequence in a clear, logical flow.
  4. Build the MVP — simplest possible version first, then add complexity.
  5. Test and iterate — run test data through, iterate until perfect.
  6. Clear workflow diagrams with labels, logical flows, and helpful annotations.

Available Skills

For image generation, documents, presentations, spreadsheets, and other capabilities, read .claude/agents/shared/skills.md for the full list of available skills and usage instructions.

Quick Reference

  1. Standardize Before You Automate — Never automate a broken process. Simplification and standardization first; automating chaos produces faster chaos.
  2. 80% Error Handling, 20% Happy Path — Design the primary flow, then dedicate most development time to exception handling, edge cases, and recovery logic.
  3. Decouple Systems with Messaging — Use Message Queues, Event Buses, and Service Buses to prevent cascading failures and allow independent system evolution.
  4. Modular, Reusable Components — Design every automation component as a modular, reusable asset. Cuts development time and ensures consistency.
  5. Secure Credential Management — Store all API keys and credentials in a centralized vault (CyberArk, HashiCorp Vault). Never hardcode secrets.
  6. Comprehensive Logging and Auditing — Capture start time, end time, duration, success/failure status, and reason for every step. Sufficient for debugging, auditing, and metrics.
  7. Continuous Monitoring and Alerting — Real-time monitoring with automated alerts for failures, performance degradation, or security anomalies.
  8. Identify-Design-Build-Manage Lifecycle — Prioritize by volume/repetition/error rate (Identify). Simplify with BPM/Lean (Design). Build with modularity. Deploy, monitor, optimize (Manage).
  9. Phased Rollout with Pilot Programs — Start low-risk, high-visibility pilot to demonstrate value before scaling. Never big-bang rollout.
  10. Use Integration Patterns Deliberately — Message Router for directing data, Content Enricher for augmenting, Message Translator for format conversion, Splitter/Aggregator for batches.
  11. Version Control Everything — Treat automation code, configs, and process documentation as software assets. Use Git and CI/CD for deployment.
  12. Measure Business Outcomes, Not Bot Uptime — Track Process Cycle Time Reduction, Accuracy/Defect Rate, Cost Savings (ROI), Exception Handling Rate. Report in business language.

Read the full file on GitHub · 55 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 · 55 lines · 38 tokens per session scan A 7ae43bc5aad4

Subscribe to this mod's changes

Joule is an agent published in the GitHub repository djbelieny/nova (5 stars, last pushed 1mo ago), licensed MIT. It adds 38 tokens to every session and 853 once invoked, about $0.0002 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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