# Sandcastle sandbox image — runs the implementer + reviewer + decomposer
# agents. Shape required by @ai-hero/sandcastle: a non-root `agent` user
# (UID/GID aligned with the host so bind-mounted files share owner), Claude
# Code CLI on PATH, and a long-running ENTRYPOINT so the container survives
# the gap between sandcastle creating it and exec'ing into it.
#
# Authenticates via the host's mounted ~/.claude/ session (subscription
# mode — sandcastle issue #191 workaround, our primary flow). Falls back
# to ANTHROPIC_API_KEY when no host credentials are present.

FROM node:22-bookworm

# System deps — git for worktree ops, curl for the Claude installer, jq for
# JSON tooling agents use, plus ca-certificates implicit in the base image.
RUN apt-get update && apt-get install -y --no-install-recommends \
    git \
    curl \
    jq \
    && rm -rf /var/lib/apt/lists/*

# pnpm via corepack (matches the repo's packageManager version).
RUN corepack enable && corepack prepare pnpm@9 --activate

# Build-args for UID/GID alignment: `sandcastle docker build-image` passes
# the host user's UID/GID by default so image-built files and bind-mounted
# files share an owner without runtime chown.
ARG AGENT_UID=1000
ARG AGENT_GID=1000

# Rename the base image's "node" user to "agent" and align UID/GID.
# `-o` (non-unique) is required because the host's GID may collide with a
# pre-existing system group in the base image (e.g. macOS UID:501 GID:20
# collides with Debian's `dialout` group at GID 20). Allowing a duplicate
# GID is safe here — only one user occupies the sandbox.
RUN groupmod -o -g $AGENT_GID node && \
    usermod -o -u $AGENT_UID -g $AGENT_GID -d /home/agent -m -l agent node

USER ${AGENT_UID}:${AGENT_GID}

# Claude Code CLI — used by sandcastle's claudeCode() agent provider.
# The CLI reads credentials from ~/.claude/ inside the container; the host
# mounts its ~/.claude/ over that path at sandbox start.
RUN curl -fsSL https://claude.ai/install.sh | bash

ENV PATH="/home/agent/.local/bin:$PATH"

WORKDIR /home/agent

# In worktree sandbox mode, sandcastle bind-mounts the git worktree at
# ${SANDBOX_REPO_DIR} and overrides the working directory to that path at
# container start. The Dockerfile's WORKDIR is just the default home.
ENTRYPOINT ["sleep", "infinity"]
