Initial commit — RoadCode import

lib/providers/provider.sh

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+# shellcheck source=../common.sh
+. "$ROOT_DIR/lib/common.sh"
+# shellcheck source=anthropic.sh
+. "$ROOT_DIR/lib/providers/anthropic.sh"
+# shellcheck source=openai.sh
+. "$ROOT_DIR/lib/providers/openai.sh"
+# shellcheck source=ollama.sh
+. "$ROOT_DIR/lib/providers/ollama.sh"
+
+normalize_provider() {
+  local provider="$1"
+  printf '%s' "$provider" | tr '[:upper:]' '[:lower:]'
+}
+
+select_provider() {
+  if ollama_available; then
+    printf '%s' "ollama"
+    return 0
+  fi
+
+  if [[ -n "${ANTHROPIC_API_KEY:-}" ]]; then
+    printf '%s' "anthropic"
+    return 0
+  fi
+
+  if [[ -n "${OPENAI_API_KEY:-}" ]]; then
+    printf '%s' "openai"
+    return 0
+  fi
+
+  die "No provider available. Set OLLAMA_BASE_URL or API keys."
+}
+
+provider_call() {
+  local provider="${1:-auto}"
+  local system_prompt="${2:-}"
+  local user_prompt="${3:-}"
+
+  provider="$(normalize_provider "$provider")"
+  if [[ -z "$provider" || "$provider" == "auto" || "$provider" == "local-first" ]]; then
+    provider="$(select_provider)"
+  fi
+
+  case "$provider" in
+    ollama)
+      ollama_call "$system_prompt" "$user_prompt"
+      ;;
+    anthropic|claude)
+      anthropic_call "$system_prompt" "$user_prompt"
+      ;;
+    openai)
+      openai_call "$system_prompt" "$user_prompt"
+      ;;
+    *)
+      die "Unsupported provider: $provider"
+      ;;
+  esac
+}