Semantic and hybrid search require an explicit OpenAI-compatible embeddings
endpoint. The endpoint must use HTTPS, except for loopback HTTP during local
development. If api_key_env is empty, no authorization header is sent.
auto follows the system appearance (macOS/Linux XDG/Windows registry) and picks the truecolor vs ANSI palette from terminal capability. dark and light force a palette. The key rejects unknown values and typos (e.g. mode = "ligth" is a hard error).
Seconds without tool calls before the stdio MCP server exits; 0 keeps it alive until the host closes stdin. The sivtr mcp serve --idle-exit flag overrides this.