Borrowing it
Nothing to install: this file belongs to wybert/earth-agent-chrome-ext. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/wybert/earth-agent-chrome-ext/main/CLAUDE.mdgit clone --depth 1 https://github.com/wybert/earth-agent-chrome-extWrote 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.
[](https://agentmods.dev/instructions/wybert/earth-agent-chrome-ext/claude-md)<a href="https://agentmods.dev/instructions/wybert/earth-agent-chrome-ext/claude-md"><img src="https://agentmods.dev/badge/instructions/wybert/earth-agent-chrome-ext/claude-md.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00961 | $0.00961 |
| Opus 5 | $0.00481 | $0.00481 |
| Sonnet 5 | $0.00192 | $0.00192 |
| Haiku 4.5 | $0.00096 | $0.00096 |
Grade A, and why
earth-agent-chrome-ext CLAUDE.md 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Guidance for Claude Code and other AI coding agents (Gemini, Cursor, Codex, etc.) working with this repository.
Project Overview
Earth Agent is a Chrome extension (Manifest V3) + MCP server for Google Earth Engine. It enables AI-powered GEE automation through chat - write code, run analysis, debug errors, explain maps. Works as a Chrome extension or via MCP with Claude Code/Cursor.
Quick Commands
npm run build # Build extension to dist/
npm run format # Format the code with Prettier
npm run dev # Watch mode for development
npm run type-check # TypeScript check
npm test # Run Jest tests
Version Management
npm version patch # Bump version (auto-syncs all files)
git push --follow-tags # Triggers GitHub Actions release
cd mcp-server && npm publish # Publish MCP to npm
Version synced across: package.json, src/manifest.json, mcp-server/package.json
Project Structure
src/
├── background/ # Service worker, AI chat handler, MCP client
├── content/ # Earth Engine DOM manipulation
├── sidepanel/ # React UI
├── components/ # React components (Chat, Settings, Onboarding)
├── lib/tools/ # AI tools and services
├── lib/prompts/ # System prompts (Ask/Do modes)
└── manifest.json
mcp-server/ # MCP server (npm: earth-agent-mcp)
scripts/ # version-sync.js, prepare-manifest-for-store.js
docs/ # User docs, release notes
reference/ # Developer docs, deployment guides
MCP Server Architecture
AI Editor (Claude Code/Cursor/Zed)
↓ stdio (MCP Protocol)
MCP Server (earth-agent-mcp)
↓ WebSocket (port 3847)
Chrome Extension (Background Script)
↓ Chrome APIs
Google Earth Engine Code Editor
Key Files
| File | Purpose |
|---|---|
src/background/chat-handler.ts |
AI provider integration, tool execution |
src/lib/tools/ai-tools.ts |
All AI SDK tool definitions |
src/lib/tools/services/ |
Shared service layer (editor, GEE, browser) |
src/lib/prompts/gee-prompts.ts |
System prompts for Ask/Do modes |
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.
- 7d ago First seen · 117 lines · 961 tokens per session scan A 7101d85b86ee
earth-agent-chrome-ext CLAUDE.md is an instructions file published in the GitHub repository wybert/earth-agent-chrome-ext (104 stars, last pushed 4mo ago), licensed MIT. It adds 961 tokens to every session, about $0.0048 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 2026-08-30.
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