Sparse, self-improving skill covering Dockerfile customization.
The extension handles basics in the system prompt; this skill
provides deeper reference that grows as agents hit real issues.

Assisted-by: Claude Opus 4.6 via pi

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+---
+name: ramekin
+description: Use when customizing the ramekin container image with a .ramekin/Dockerfile
+---
+
+# Ramekin container environment
+
+## Customizing the image
+
+Create `.ramekin/Dockerfile` in the workspace. It builds on top of
+`ramekin-agent`:
+
+```dockerfile
+FROM ramekin-agent
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    postgresql-client && rm -rf /var/lib/apt/lists/*
+```
+
+The image is rebuilt on every `ramekin run`.
+
+---
+
+*This is a self-improving skill — see the `self-improving-skills` skill.*