cloudflare sandbox backend #17
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Add support for choosing between Modal and Cloudflare sandbox backends via the SANDBOX_BACKEND environment variable (or sandbox_backend in Terraform). Changes: - Add SandboxManager interface for backend abstraction - Create ModalSandboxManager implementing the interface - Create CloudflareSandboxManager implementing the interface - Add factory function that selects backend based on env var - Update SessionDO to use abstraction for spawn/snapshot/restore - Add packages/sandbox/ with Cloudflare container code: - TypeScript supervisor (port of Modal's entrypoint.py) - TypeScript bridge (port of Modal's bridge.py) - Dockerfile for Cloudflare container image - inspect-plugin.js (same as Modal, OpenCode custom tool) - Update Terraform to support sandbox_backend variable - Make Modal resources conditional (only deployed when backend=modal) - Add docs/SANDBOX_BACKENDS.md with setup instructions Backend comparison: - Modal: Supports snapshot/restore, Python supervisor, full Terraform support - Cloudflare: No snapshot support yet, TypeScript supervisor, requires wrangler for containers Default backend is 'modal' for backward compatibility. Set sandbox_backend="cloudflare" in terraform.tfvars for Cloudflare.
- Move sandbox backend documentation from docs/SANDBOX_BACKENDS.md to README - Add condensed comparison table and configuration example - Update architecture diagram to show Modal/Cloudflare options - Add packages/sandbox/**/*.js to ESLint ignores - Fix inspect-plugin.js globals and unused parameter
- Add @cloudflare/sandbox dependency and export Sandbox class - Support both header-based (Modal) and query param (Cloudflare/Bun) auth - Fix Terraform outputs for conditional backend modules
Greptile OverviewGreptile SummaryAdded Cloudflare Sandbox as an alternative backend to Modal, creating a pluggable sandbox architecture. Key Changes
ArchitectureThe abstraction properly handles backend differences:
Important Files Changed
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@ColeMurray if we good get this feature - would be really awesome |
Owner
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thanks @deathbyknowledge, super cool! I created an issue here for discussion: #26 |
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Greetings 👋
I'm Steve from Cloudflare's Agents team. We build and maintain the Sandbox SDK and we thought it'd be a great idea to expand the sandboxing here to allow different provider options (modal/cloudflare), customizable at deploy time.
Cloudflare's Sandbox SDK has fast cold starts and great placements, although we do not support snapshotting (yet! coming soon).
PS: Cool repo!