# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project Overview

A single-file Express.js proxy (`app.js`) that translates Anthropic API (`/v1/messages`) requests to an Ollama API backend. It enables Claude SDK clients to route through this proxy to a local/remote Ollama instance at `https://ollama.aquantico.de`.

## Running

```bash
node app.js
```

The proxy listens on port **11435**. No build step, lint, or test infrastructure exists.

## Key Architecture

- **`app.js`** — Single entry point. All logic is in one file.
- **`convertAnthropicToOllama()`** — Transforms Anthropic request body into Ollama format: maps system messages, converts content blocks (text + tool_results), sanitizes tool schemas, sets `num_ctx: 131072` and `think: false`.
- **`handleResponse()`** — Reads Ollama's SSE stream and re-emits it as Anthropic-compatible SSE events (`message_start`, `content_block_start`, `content_block_delta`, `content_block_stop`, `message_delta`, `message_stop`).
- **`convertAnthropicTools()`** — Strips invalid fields from Anthropic tool schemas and normalizes them to Ollama's function-call format.
- Model names starting with `claude-` are silently replaced with `qwen3.6:35b-a3b-q4_K_M`.

## Notable Details

- The proxy strips `think` from Ollama requests (hardcoded `false`).
- Tool call arguments are parsed and sent as a single `partial_json` delta.
- Request IDs use `Date.now()` for logging correlation.
- A backup of the previous version is saved as `app.js.v10`.