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.env.example

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+# ---------------------------------------------------------------------------
+# Copilot provider. The server picks the FIRST one that is configured:
+#   1. OpenRouter  (if OPENROUTER_API_KEY is set)
+#   2. Ollama      (if reachable at OLLAMA_HOST)
+#   3. Rule-based fallback (always works, no config, no network)
+# The demo is fully functional with none of these set.
+#
+# These are the STARTING defaults. The in-app settings page (AI cog in the
+# header) overrides them at runtime and persists to .copilot-settings.json;
+# 'Reset to defaults' there discards that and falls back to this file.
+# ---------------------------------------------------------------------------
+
+# --- Option 1: OpenRouter (cloud) ---
+# OPENROUTER_API_KEY=sk-or-v1-...
+# OPENROUTER_MODEL=meta-llama/llama-3.3-70b-instruct
+
+# --- Option 2: Ollama (local, recommended for on-stage demos) ---
+# Start it with:  ollama serve
+OLLAMA_HOST=http://127.0.0.1:11434
+# Fast + interactive (recommended for live demo):
+OLLAMA_MODEL=qwen3.5-4b-32k:latest
+# Higher quality, noticeably slower:
+# OLLAMA_MODEL=gemma4-26b-32k:latest
+
+# --- Force the offline rule-based copilot even if a provider is available ---
+# Useful for rehearsing the worst case.
+# COPILOT_PROVIDER=fallback
+
+# --- Server ---
+PORT=8787
+
+# --- Telemetry source: simulated | mqtt | opcua ---
+# mqtt and opcua are documented stubs; see server/ingest/
+TELEMETRY_SOURCE=simulated