ekx-anthropic-sdklisted

# Anthropic SDK Claude is the default model at Ekinoxis. `@anthropic-ai/sdk` direct in most apps; `@ai-sdk/anthropic` where the Vercel AI SDK is already in play. **The bundled `claude-api` skill is authoritative** for model ids, pricing and parameters — read it before answering anything about models or cost, rather than relying on memory. The one exception in the portfolio: an older agent app uses LangChain + OpenAI, inherited from the Coinbase AgentKit starter ([`../ekx-coinbase-cdp/SKILL.md`](../ekx-coinbase-cdp/SKILL.md)). --- ## Environment ```bash ANTHROPIC_API_KEY= # SECRET — server only, never NEXT_PUBLIC_ ANTHROPIC_MODEL= # pin the model in env so it can change without a deploy ``` **Never call the API from the browser.** A key in the client bundle is a metered, billable secret handed to anyone who opens devtools. Always proxy through a route handler. --- ## Tool use — the pattern that matters The reference shape: the user asks about P&L in plain language, Claude calls tools that query Supabase, and answers from real rows. ```ts const tools = [{ name: "get_positions", description: "Fetch the user's open positions with entry price and current value.", input_schema: { type: "object", properties: { chain: { type: "string", enum: ["evm", "solana", "xrpl"] } }, required: [], }, }]; let messages = [{ role: "user", content: prompt }]; while (true) { const res = await anthropic.messages.create({ model: process.env.ANTHROPIC_M