# LLM backend credentials.
#
# Two families, selected with `[llm] provider`. Set the key for the one you use
# and leave the rest blank.
#
# 1. Metered API — set the matching key below.
# 2. Subscription CLI — set NOTHING here. `provider = "claude_cli"` drives
#    `claude` (Claude Code, OAuth) and `provider = "codex_cli"` drives `codex`
#    (ChatGPT login). Sign in once by running `claude` (or `codex login`).
#    Any ANTHROPIC_API_KEY / OPENAI_API_KEY in your environment is deliberately
#    stripped from the CLI subprocess so a call can never silently fall back to
#    metered API billing.
#
# Either way, check the whole chain with `co-scientist doctor`.

# provider = "openrouter" (the default). One key, 200+ models from every
# vendor, and [models] can point each agent at a different one.
OPENROUTER_API_KEY=

# provider = "openai" or "openai_compatible".
# Also serves embeddings under any backend — see below.
#
# CAUTION: this key takes precedence over every OpenAI-compatible preset's own
# key, OPENROUTER_API_KEY included. A stray one here gets sent to OpenRouter and
# rejected — leave it blank unless you are actually using OpenAI, or need it for
# embeddings while running a non-preset provider.
OPENAI_API_KEY=

# Talking to one vendor directly instead of going through OpenRouter.
ANTHROPIC_API_KEY=
GEMINI_API_KEY=
GROQ_API_KEY=
TOGETHER_API_KEY=
MISTRAL_API_KEY=
# provider = "ollama" is keyless; it talks to localhost:11434.

# Embeddings — always a hosted call, whichever backend runs the agents.
# No agent CLI exposes an embedding endpoint, and Proximity/dedup needs real
# semantic vectors. Voyage is the default provider; OPENAI_API_KEY above is the
# fallback. With neither, dedup degrades to a local hash embedder that only
# catches literal token overlap.
VOYAGE_API_KEY=

# Web search (Tavily primary, Brave fallback). With neither set, the
# `web_search` tool is not registered at all and agents rely on
# PubMed / arXiv / Europe PMC, which need no key.
TAVILY_API_KEY=
BRAVE_API_KEY=

# Optional: improves PubMed / OpenAlex rate limits.
NCBI_API_KEY=
OPENALEX_API_KEY=