Skill Claude CodeCodex
MANDATORY reading before writing ANY backend, API, server, or fullstack application code (createartifact types fullstack-stateless-app / fullstack-stateful-app, or anything that will be launched with launchbackend). Contains the complete hard contract: the canonical FastAPI+Mangum backend.py template, SECRETS…
Skill Claude CodeCodex
MANDATORY reading before building ANY HTML dashboard, chart, plot, interactive report, or browser-based visualization (createartifact type="html-app", or the frontend of a fullstack app). Contains the full HTML output contract: self-contained file rules, Apache ECharts setup, dark theme, layout/design standards, and…
Skill Claude CodeCodex
Recall BEFORE fetching public news, market, economic, or world data from the scratchpad. Catalog of free, open, no-API-key data endpoints and URL patterns — news RSS (Google News, Reuters, AP, BBC, NPR), financial/market (yfinance, FRED, CoinGecko), economic/global (World Bank, OECD, exchange rates), and…