diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
new file mode 100644
index 000000000..35d290d1b
--- /dev/null
+++ b/.devcontainer/Dockerfile
@@ -0,0 +1,8 @@
+FROM mcr.microsoft.com/devcontainers/typescript-node:1-22-bookworm
+
+ENV BUN_INSTALL=/usr/local/bun
+
+RUN set -eux; \
+    curl -fsSL https://bun.sh/install | bash; \
+    ln -sf /usr/local/bun/bin/bun /usr/local/bin/bun; \
+    ln -sf /usr/local/bun/bin/bunx /usr/local/bin/bunx
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 000000000..8efef08ef
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,14 @@
+{
+  "name": "Node.js & TypeScript",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": "."
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": ["oven.bun-vscode"]
+    }
+  },
+  "postCreateCommand": "bun install --frozen-lockfile && bash ./.devcontainer/setup-gstack.sh",
+  "remoteUser": "node"
+}
diff --git a/.devcontainer/setup-gstack.sh b/.devcontainer/setup-gstack.sh
new file mode 100755
index 000000000..86bcca00c
--- /dev/null
+++ b/.devcontainer/setup-gstack.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+SKILL_DIR="$HOME/.claude/skills"
+
+mkdir -p "$SKILL_DIR"
+
+target="$SKILL_DIR"
+
+# Copy repo contents into ~/.claude/skills without deleting existing files.
+cp -a "$REPO_ROOT"/. "$target"/
+
+echo "Skill directory: $SKILL_DIR"
+echo "Copied project root into: $target"