Devin Foley
486fb88a15
> _Stacked on top of #5685 → #5686. Diff against master includes commits from earlier PRs in the stack — review focuses on the two new commits (`Extend sandbox callback bridge for Worker-hosted plugins` + `Add Cloudflare sandbox provider plugin`)._ ## Thinking Path > - Paperclip orchestrates AI agents for zero-human companies > - Each agent runs in a sandbox environment, and operators choose which provider backs that sandbox — today E2B and Daytona are bundled with the platform > - Cloudflare Workers + Durable Objects + the Sandbox SDK offer a credible new option: globally distributed, cheap idle, and operator-deployable as a single Worker > - To plug it in, Paperclip needs (a) a provider plugin that speaks the `PaperclipPluginManifestV1` lifecycle and (b) a small operator-deployed Worker — the **bridge** — that adapts Paperclip's runtime RPCs to the Cloudflare Sandbox SDK > - The plugin extends the existing sandbox-callback-bridge with a `bridge.transport: "worker"` discriminator so the platform routes runtime RPCs through the Worker bridge instead of the in-process runner > - This pull request adds the plugin, the bridge Worker template, and the supporting adapter-utils + server hooks the new transport needs > - The benefit is that operators can run sandboxes on Cloudflare's edge with no new platform code beyond installing the plugin and deploying the Worker ## What Changed **Shared support (`Extend sandbox callback bridge for Worker-hosted plugins`):** - `packages/adapter-utils/src/sandbox-callback-bridge.{ts,test.ts}`: expose `expectedHostHeader` so plugin-side bridge clients can verify the canonical request envelope before forwarding. - `packages/adapter-utils/src/command-managed-runtime.{ts,test.ts}`: relax the always-fresh runner construction so callers can re-use a runner across exec calls (Worker-hosted bridges hold the runner inside a Durable Object). - `server/src/services/environment-runtime.ts` + `environment-runtime.test.ts`: route Worker-hosted bridges through the same env-shaping path as E2B and pin the `requestEnv` contract. - `server/src/services/plugin-environment-driver.ts`: thread an optional `issueId` through the runtime descriptor so bridges can scope leases to the originating issue (used by Cloudflare to map a sandbox to the issue/workflow for billing and audit). - `packages/plugins/sdk/src/protocol.ts`: add `issueId?` to `PluginEnvironmentDriverBaseParams` and the new `bridge.transport: "worker"` discriminator that the new plugin declares. - `server/__tests__/heartbeat-plugin-environment.test.ts`: pin the heartbeat path against the new runtime descriptor. **The Cloudflare plugin itself (`Add Cloudflare sandbox provider plugin`):** - `packages/plugins/sandbox-providers/cloudflare/`: plugin entry, manifest, plugin runtime (lifecycle + bridge client), config parsing, and Vitest coverage. Manifest declares `bridge.transport: "worker"` so the platform routes runtime RPCs through the bridge client. - `bridge-template/`: a Worker template the operator deploys with `wrangler`. Owns Durable Object-backed sessions (`sessions.ts`), exec/stream routes (`exec.ts`, `routes.ts`), and an HMAC auth layer (`auth.ts`) that pins the `Host` header surface. Includes the SDK-contract-correct exec implementation, lease recovery, and chunked stdout/stderr streaming. - Tests cover lease/session handoff (`bridge-template/src/exec.test.ts`, `routes.test.ts`), bridge client request shaping (`src/bridge-client.test.ts`), and end-to-end plugin behavior (`src/plugin.test.ts`) including streamed exec output. 27 tests in total. - `README.md` walks the operator through deploying the bridge Worker, registering the plugin, and configuring the runtime. ## Verification - `pnpm typecheck` - `pnpm exec vitest run --no-coverage packages/adapter-utils/src/sandbox-callback-bridge.test.ts packages/adapter-utils/src/command-managed-runtime.test.ts server/src/__tests__/environment-runtime.test.ts server/src/__tests__/heartbeat-plugin-environment.test.ts` - `(cd packages/plugins/sandbox-providers/cloudflare && pnpm test)` — 27 passing For an operator-side smoke test: 1. Deploy the bridge: `cd packages/plugins/sandbox-providers/cloudflare/bridge-template && wrangler deploy` 2. Register the plugin in your Paperclip instance, point its bridge URL at the deployed Worker, set the HMAC shared secret. 3. Create a sandbox environment whose provider is `cloudflare`, then run a Codex or Claude job against it. ## Risks - Adds a new `bridge.transport: "worker"` code path, but the existing E2B / Daytona transports go through the same shaped helpers and have explicit test coverage that pins their behavior unchanged. - The Worker bridge stores session state in a Durable Object; operator instances must be aware of the corresponding Cloudflare costs (DO requests, storage). Documented in the README. - The `issueId` plumbing is optional throughout — existing plugins that don't supply it continue to work. ## Model Used - Provider: Anthropic - Model: Claude Opus 4.7 (1M context) - Capabilities used: extended reasoning, tool use (Read/Edit/Bash/Grep) ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [ ] If this change affects the UI, I have included before/after screenshots — N/A, no UI change - [x] I have updated relevant documentation to reflect my changes (plugin README, bridge-template README) - [x] I have considered and documented any risks above - [x] I will address all Greptile and reviewer comments before requesting merge --------- Co-authored-by: Paperclip <noreply@paperclip.ing>
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@paperclipai/plugin-cloudflare-sandbox
Published Cloudflare sandbox provider plugin for Paperclip.
This package lives in the Paperclip monorepo, but it is intentionally excluded from the root pnpm workspace and shaped to publish and install like a standalone npm package. Operators can install it from the Plugins page by package name, and the host will fetch its dependencies at install time without adding lockfile churn to the Paperclip repo.
Install
From a Paperclip instance, install:
@paperclipai/plugin-cloudflare-sandbox
Configure Cloudflare from Company Settings -> Environments, not from the plugin's instance settings page.
Configuration
The environment uses core driver: "sandbox" with provider: "cloudflare".
Required fields:
bridgeBaseUrlbridgeAuthToken
Important validation rules:
reuseLease: truerequireskeepAlive: true- non-local
bridgeBaseUrlvalues must behttps:// sessionIdis required whensessionStrategyisnamed
Pasted auth tokens are stored by Paperclip as company secrets because the manifest marks bridgeAuthToken as a secret-ref field.
Bridge template
The package includes an operator-facing Cloudflare Worker scaffold under bridge-template. That template uses @cloudflare/sandbox, a Sandbox Durable Object binding, and a small JSON HTTP surface under /api/paperclip-sandbox/v1.
Local development
cd packages/plugins/sandbox-providers/cloudflare
pnpm install --ignore-workspace --no-lockfile
pnpm build
pnpm test
pnpm typecheck
These commands assume the repo root has already been installed once so the local @paperclipai/plugin-sdk workspace package is available to the compiler during development.