feat(ai-sandbox-e2b): add E2B sandbox provider - #1343
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Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughAdds the ChangesE2B sandbox provider
Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to This adds an opt-in E2B sandbox provider without changing existing package APIs. No concrete issue remains that would block merging. Sequence Diagram(s)sequenceDiagram
participant Caller
participant E2BProvider
participant E2BSDK
participant E2BHandle
Caller->>E2BProvider: create sandbox
E2BProvider->>E2BSDK: Sandbox.create
E2BProvider->>E2BHandle: prepare workdir
Caller->>E2BHandle: execute command or filesystem operation
E2BHandle->>E2BSDK: perform E2B operation
E2BSDK-->>E2BHandle: return result or stream
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✅ Passed checks (4 passed)
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Inline comments:
In `@packages/ai-sandbox-e2b/src/provider.ts`:
- Line 85: Validate that the configured apiUrl uses HTTPS before assigning it to
opts.apiUrl in the provider configuration flow. Reject non-HTTPS URLs before
creating connection options, preventing apiKey—including E2B_API_KEY-derived
keys—from being forwarded over insecure transport.
- Line 135: Update the create() flow around Sandbox.create() and
sandbox.files.makeDir() to race each pending operation against input.signal so
aborted calls reject promptly; if Sandbox.create() resolves after abortion, kill
the newly created sandbox before rejecting. Add a pending-createMock test that
verifies prompt rejection and cleanup.
- Around line 163-176: Update restoreSnapshot to create the sandbox through the
shared abort-aware sandbox creation helper rather than calling Sandbox.create
directly, passing input.signal so cancellation during creation is handled and
any accepted sandbox is cleaned up. Preserve the existing create options and
subsequent prepare behavior.
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.changeset/add-ai-sandbox-e2b.mddocs/config.jsondocs/sandbox/providers.mdpackages/ai-sandbox-e2b/README.mdpackages/ai-sandbox-e2b/package.jsonpackages/ai-sandbox-e2b/src/handle.tspackages/ai-sandbox-e2b/src/index.tspackages/ai-sandbox-e2b/src/provider.tspackages/ai-sandbox-e2b/tests/e2b.test.tspackages/ai-sandbox-e2b/tests/handle.test.tspackages/ai-sandbox-e2b/tests/journal.conformance.test.tspackages/ai-sandbox-e2b/tests/lstat.test.tspackages/ai-sandbox-e2b/tests/provider.test.tspackages/ai-sandbox-e2b/tsconfig.jsonpackages/ai-sandbox-e2b/vite.config.tspackages/ai-sandbox/README.md
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@tanstack/ai-sandbox-e2bruns harness adapters (Claude Code, Codex, GrokBuild, OpenCode, ACP agents) inside managed E2B Firecracker
microVMs through the same
SandboxProvider/SandboxHandlecontract as theDaytona, Vercel, Upstash Box, and Blaxel providers. Swap the provider and the
rest of the sandbox definition stays the same.
🎯 Changes
packages/ai-sandbox-e2b(e2bSandbox()): native filesystemAPI,
exec/spawnwith a real sandbox pid, nativecwd/env(noexport K=V;in command strings), writable stdin, separate stdout/stderr,preview URLs (token-gated when public traffic is off), native snapshots,
restore, fork, resume-by-id (also wakes a paused sandbox), and
network: 'deny'mapped to E2B's internet switch.killableProcesses: trueis measured, not asserted. envd's own kill is aSIGKILL to the shell pid and a backgrounded
( … ) & waitchild survivedit, so every command runs as a
setsidgroup leader andkill()runskill -KILL -- -<pid>. The shared journal conformance kill case passes.docs/sandbox/providers.md(table row,## E2Bsection,killableProcessesandwritableStdintables),packages/ai-sandbox/README.md.@tanstack/ai-sandbox-e2bminor.Not in this PR: the lstat shell probe and the bounded stream queue are a
third copy of what Daytona and Upstash Box carry. Hoisting them into
@tanstack/ai-sandboxis a separate refactor.✅ Checklist
pnpm run test:pr, or these tests do not apply to this pull request.docs/for this change, or this change is not user-facing.pnpm changeset), or this PR does not change a published package.🚀 Release Impact
Testing
Commands run.
pnpm test:prpasses (all 11 targets, 92 projects, kiira1237 snippets). In
packages/ai-sandbox-e2b: 58 unit tests pass without akey; with
E2B_API_KEYthe live suite plusrunJournalConformancepass16/16. No sandboxes were left behind (
Sandbox.listempty after the run).Not run: the Playwright E2E suite. This PR adds no LLM adapter and changes no
chat/stream/tool code, so the E2E matrix does not cover a sandbox provider
(same as the Upstash Box and Blaxel provider PRs).
Manual test.
export E2B_API_KEY=...(free tier is enough).pnpm --filter @tanstack/ai-sandbox-e2b test:libjournal conformance — e2bblock: the case"kills the sandbox-side process, not just the host's view of it" runs
against a real sandbox and passes.
How this PR makes testing easy. Mocked unit tests for provider and handle
(
tests/provider.test.ts,tests/handle.test.ts,tests/lstat.test.ts), acredential-gated live suite (
tests/e2b.test.ts) that measures stdin, kill,abort, snapshot, fork, resume, network deny, and the traffic token, and the
shared
runJournalConformanceregistration.Risk / rollback
Low: a new opt-in package, no change to
@tanstack/ai-sandboxor otherproviders. Rollback is a revert. Known limits, documented:
kill()alwayssends
SIGKILL; a custom template withoutsetsid(util-linux) fails everycommand with exit 127 instead of silently losing group kill.
Maintenance
E2B is the vendor here. A maintainer contact from the E2B side for this
package is being confirmed and will be added to this PR.
Public API change
New package only; nothing in an existing package changes.
Before
After
Summary by CodeRabbit
New Features
Documentation