diff --git a/ai/hermes/entrypoint.sh b/ai/hermes/entrypoint.sh
new file mode 100644
index 0000000..5b2f0c3
--- /dev/null
+++ b/ai/hermes/entrypoint.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+# Hermes Agent entrypoint script
+# Installs custom tools and runtime dependencies,
+# then delegates to the passed command (usually "gateway run").
+
+# Install custom tools from persistent volume if available
+if [ -f /opt/data/hermes-tools/install.sh ]; then
+    bash /opt/data/hermes-tools/install.sh
+fi
+
+# Install additional runtime deps (idempotent)
+if command -v uv &>/dev/null; then
+    uv pip install --system --no-cache-dir --quiet \
+        openai mautrix[encryption] 2>/dev/null || true
+fi
+
+# Execute the passed command with tini for proper signal handling
+exec tini -g -- "$@"