Initial commit

.sandcastle/.env.example

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+# .sandcastle/.env — runtime tokens for sandcastle dispatch.
+# Copy to .sandcastle/.env (gitignored) and fill what you need.
+#
+# Most developers don't need ANY of these if they've run `claude login` on
+# the host — sandcastle mounts ~/.claude/ into the sandbox by default.
+
+# Anthropic API key (fallback when no host Claude Code session exists)
+# ANTHROPIC_API_KEY=
+
+# OpenAI / Codex (alternative)
+# OPENAI_API_KEY=
+
+# GitHub access for orchestrator-created PRs
+# GITHUB_TOKEN=
+
+# Override Claude creds path (default: ~/.claude/)
+# SANDCASTLE_CLAUDE_CREDS_DIR=
+
+# Sandbox provider (docker / podman / vercel / daytona)
+SANDCASTLE_PROVIDER=docker