Project requires edition 2024 (nightly) and grcov for coverage.
Container packages these along with sqlite3 and bc so the
agent environment is self-contained.

Assisted-by: Claude Opus 4.6 via pi

diff --git a/.ramekin/Dockerfile b/.ramekin/Dockerfile
new file mode 100644
index 0000000..7e162d0
--- /dev/null
+++ b/.ramekin/Dockerfile
@@ -0,0 +1,20 @@
+FROM ramekin-agent
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    bc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Rust nightly (edition 2024)
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH="/usr/local/cargo/bin:$PATH"
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+    | sh -s -- -y --default-toolchain nightly --profile minimal \
+    && rustup component add llvm-tools-preview rustfmt clippy \
+    && cargo install grcov
+
+ENV RANGER_DEFAULT_BACKLOG=frork
+
+WORKDIR /workspace
+
+ENTRYPOINT ["pi"]
diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index d314611..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,21 +0,0 @@
-FROM node:24-trixie-slim
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
-    ca-certificates \
-    curl \
-    fd-find \
-    git \
-    ripgrep \
-    && rm -rf /var/lib/apt/lists/* \
-    && ln -sf /usr/bin/fdfind /usr/bin/fd
-
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
-    | sh -s -- -y --default-toolchain nightly --profile default
-ENV PATH="/root/.cargo/bin:${PATH}"
-
-RUN npm install -g @mariozechner/pi-coding-agent
-
-WORKDIR /workspace
-
-ENTRYPOINT ["pi"]