diff --git a/sandbox/.bashrc b/sandbox/.bashrc
index 4d121ee..4fb5b61 100644
--- a/sandbox/.bashrc
+++ b/sandbox/.bashrc
@@ -1,6 +1,10 @@
 #!/bin/bash
 # Custom prompt: user@project-name:relative-path
 
+# Enable true color (24-bit) support for terminal
+export TERM="${TERM:-xterm-direct}"
+export COLORTERM="${COLORTERM:-truecolor}"
+
 PROJECT_NAME="${PROJECT_NAME:-sandbox}"
 
 # Function to show path relative to /home/agent
diff --git a/sandbox/Dockerfile b/sandbox/Dockerfile
index 49c828e..b72fc62 100644
--- a/sandbox/Dockerfile
+++ b/sandbox/Dockerfile
@@ -21,6 +21,8 @@ ENV DEBIAN_FRONTEND=noninteractive \
     NODE_VERSION=22.x \
     CLAUDE_CODE_VERSION=latest \
     PATH="/root/.local/bin:/home/agent/.local/bin:$PATH" \
+    TERM=xterm-direct \
+    COLORTERM=truecolor \
     ANTHROPIC_BASE_URL="" \
     ANTHROPIC_AUTH_TOKEN="" \
     ANTHROPIC_MODEL="" \
diff --git a/sandbox/entrypoint.sh b/sandbox/entrypoint.sh
index 0d7de03..3837615 100755
--- a/sandbox/entrypoint.sh
+++ b/sandbox/entrypoint.sh
@@ -1,2 +1,5 @@
 #!/bin/bash
-ttyd -W bash
+# Start ttyd with true color support
+# -t: Set terminal type to xterm-direct (supports 24-bit true color)
+# -W: Enable websocket compression
+ttyd -t 'xterm-direct' -W bash