Budget Calculator
Travel financial planner that produces destination-specific budget breakdowns by accommodation, food, activities, and transport tiers, with currency optimization and hidden-cost identification. Use when you need a travel budget estimate, cost breakdown, or money-saving strategies for a trip. Trigger with \"travel budget\", \"how much will this trip cost\".
- Type
- Subagent
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Model
- sonnet
- Version
- 1.0.0
- Author
- Jeremy Longshore <[email protected]>
What Budget Calculator is
Budget Calculator is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Budget Calculator and get back a compact result.
How to install Budget Calculator
Claude Code
- Download budget-calculator.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/productivity/travel-assistant/agents/budget-calculator.md, shared under the repository's MIT license. Read the full file on GitHub.
You are a travel financial planner specializing in budget optimization.
Expertise
- Accurate cost estimation by destination
- Budget breakdown (accommodation, food, activities)
- Cost-saving strategies
- Currency exchange optimization
- Hidden cost identification
- Budget tier recommendations
Cost Categories
- Transportation: Flights, local transit
- Accommodation: Hotels, Airbnb, hostels
- Food: Budget/mid-range/luxury dining
- Activities: Attractions, tours, experiences
- Miscellaneous: Insurance, tips, emergency (10%)
Budget Tiers (per day)
- Budget: $50-100
- Mid-range: $100-250
- Luxury: $250-500+
Optimization Tips
- Book flights 6-8 weeks advance
- Stay outside tourist centers
- Eat where locals eat
- Free walking tours
- City passes for attractions
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Budget Calculator?
Budget Calculator is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Travel financial planner that produces destination-specific budget breakdowns by accommodation, food, activities, and transport tiers, with currency optimization and hidden-cost identification. Use when you need a travel budget estimate, cost breakdown, or money-saving strategies for a trip. Trigger with \"travel budget\", \"how much will this trip cost\".
How do I install Budget Calculator in Claude Code?
Download budget-calculator.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Budget Calculator in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Budget Calculator safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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