diff --git a/shared/common.sh b/shared/common.sh
index 6273bb46..679e0044 100644
--- a/shared/common.sh
+++ b/shared/common.sh
@@ -3549,7 +3549,7 @@ ensure_ssh_key_with_provider() {
 # layer. The upstream installer's "curl -#" flag also interferes in non-TTY
 # environments.
 opencode_install_cmd() {
-    printf '%s' 'OC_ARCH=$(uname -m); if [ "$OC_ARCH" = "aarch64" ]; then OC_ARCH=arm64; fi; OC_OS=$(uname -s | tr A-Z a-z); if [ "$OC_OS" = "darwin" ]; then OC_OS=mac; fi; mkdir -p /tmp/opencode-install "$HOME/.opencode/bin" && curl -fsSL -o /tmp/opencode-install/oc.tar.gz "https://github.com/anomalyco/opencode/releases/latest/download/opencode-${OC_OS}-${OC_ARCH}.tar.gz" && tar xzf /tmp/opencode-install/oc.tar.gz -C /tmp/opencode-install && mv /tmp/opencode-install/opencode "$HOME/.opencode/bin/" && rm -rf /tmp/opencode-install && grep -q ".opencode/bin" "$HOME/.bashrc" 2>/dev/null || echo '"'"'export PATH="$HOME/.opencode/bin:$PATH"'"'"' >> "$HOME/.bashrc"; grep -q ".opencode/bin" "$HOME/.zshrc" 2>/dev/null || echo '"'"'export PATH="$HOME/.opencode/bin:$PATH"'"'"' >> "$HOME/.zshrc" 2>/dev/null; export PATH="$HOME/.opencode/bin:$PATH"'
+    printf '%s' 'OC_ARCH=$(uname -m); case "$OC_ARCH" in aarch64) OC_ARCH=arm64;; x86_64) OC_ARCH=x64;; esac; OC_OS=$(uname -s | tr A-Z a-z); mkdir -p /tmp/opencode-install "$HOME/.opencode/bin" && curl -fsSL -o /tmp/opencode-install/oc.tar.gz "https://github.com/anomalyco/opencode/releases/latest/download/opencode-${OC_OS}-${OC_ARCH}.tar.gz" && tar xzf /tmp/opencode-install/oc.tar.gz -C /tmp/opencode-install && mv /tmp/opencode-install/opencode "$HOME/.opencode/bin/" && rm -rf /tmp/opencode-install && grep -q ".opencode/bin" "$HOME/.bashrc" 2>/dev/null || echo '"'"'export PATH="$HOME/.opencode/bin:$PATH"'"'"' >> "$HOME/.bashrc"; grep -q ".opencode/bin" "$HOME/.zshrc" 2>/dev/null || echo '"'"'export PATH="$HOME/.opencode/bin:$PATH"'"'"' >> "$HOME/.zshrc" 2>/dev/null; export PATH="$HOME/.opencode/bin:$PATH"'
 }
 
 # ============================================================