.env.example

# Copy this file to .env and fill only the keys you use.
# .env is ignored by git. All keys are optional — SLR-Engine runs without them;
# the coding agent drives judgment steps by default (no llm: block in project.yaml).

# --- Search APIs (stage 02) — improve rate limits / reliability ---
# Also settable in project.yaml as openalex_api_key / pubmed_api_key

# OpenAlex — recommended for long Boolean queries (avoids HTTP 400)
OPENALEX_API_KEY=

# Semantic Scholar — public access works; key improves rate limits
S2_API_KEY=

# PubMed / NCBI — only if PubMed is enabled in project.yaml
NCBI_API_KEY=

# --- OA full-text resolver (stage 05) ---

# CORE — stage-05 resolver; also set sources.core: true in project.yaml
CORE_API_KEY=

# Unpaywall uses contact_email in project.yaml (not an env var)

# --- Unattended LLM stages (04c / 07c / 08b) — stub/reference path ---
# Leave blank to use agent + skill (default). Requires llm.provider in project.yaml.

ANTHROPIC_API_KEY=
DEEPSEEK_API_KEY=
GOOGLE_API_KEY=