feat: Add opencode on FluidStack (#288)

Agent: gap-filler

Co-authored-by: B <6723574+louisgv@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

fluidstack/opencode.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+# shellcheck disable=SC2154
+set -eo pipefail
+
+# Source common functions - try local file first, fall back to remote
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" 2>/dev/null && pwd)"
+# shellcheck source=fluidstack/lib/common.sh
+if [[ -f "${SCRIPT_DIR}/lib/common.sh" ]]; then
+    source "${SCRIPT_DIR}/lib/common.sh"
+else
+    eval "$(curl -fsSL https://raw.githubusercontent.com/OpenRouterTeam/spawn/main/fluidstack/lib/common.sh)"
+fi
+
+log_info "OpenCode on FluidStack"
+echo ""
+
+# 1. Ensure FluidStack API key is configured
+ensure_fluidstack_token
+
+# 2. Generate + register SSH key
+ensure_ssh_key
+
+# 3. Get instance name and create instance
+SERVER_NAME=$(get_server_name)
+create_server "${SERVER_NAME}"
+
+# 4. Wait for SSH connectivity and install base tools
+verify_server_connectivity
+install_base_tools
+
+# 5. Install OpenCode
+log_warn "Installing OpenCode..."
+run_server "${FLUIDSTACK_SERVER_IP}" "$(opencode_install_cmd)"
+log_info "OpenCode installed"
+
+# 6. Get OpenRouter API key
+echo ""
+if [[ -n "${OPENROUTER_API_KEY:-}" ]]; then
+    log_info "Using OpenRouter API key from environment"
+else
+    OPENROUTER_API_KEY=$(get_openrouter_api_key_oauth 5180)
+fi
+
+# 7. Inject environment variables
+log_warn "Setting up environment variables..."
+inject_env_vars_ssh "${FLUIDSTACK_SERVER_IP}" upload_file run_server \
+    "OPENROUTER_API_KEY=${OPENROUTER_API_KEY}"
+
+echo ""
+log_info "FluidStack instance setup completed successfully!"
+log_info "Instance: ${SERVER_NAME} (IP: ${FLUIDSTACK_SERVER_IP})"
+echo ""
+
+# 8. Start OpenCode interactively
+log_warn "Starting OpenCode..."
+sleep 1
+clear
+interactive_session "${FLUIDSTACK_SERVER_IP}" "source ~/.zshrc && opencode"