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Author	SHA1	Message	Date
Nicky LeachandPaperclip	10d2781a29	feat(sandbox): add the duplex bridge broker, gated transport selection, and fixed observability (#11769) ... ## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - Sandbox adapters provide controlled execution for untrusted provider environments. > - The sandbox channel needs one persistent duplex transport with strict host control. > - The transport must remain off unless the instance setting and provider capability both allow it. > - The host must detect loss, bound resource use, and expose only safe telemetry. > - This pull request adds the broker, gated selection, kill-switch wiring, fixed observability, and real-process proof. > - The benefit is safer sandbox execution with bounded failure behavior and inspectable transport results. ## Linked Issues or Issue Description No public issue exists for this change. The related pull requests are #11738 and #11750. **Problem or motivation** The sandbox duplex channel needs a host-controlled broker, strict transport gates, bounded provider input, and safe loss telemetry. Without these controls, a provider can cause replay, resource growth, unsafe endpoint selection, or data exposure through telemetry. **Proposed solution** Add a host broker with nested time limits, request limits, one-shot loss, and per-id deduplication. Select duplex transport only when the instance setting and provider capability both equal true. Assign the endpoint and nonce on the host. Reject invalid readiness data and use the file bridge on failure. Add fixed redacted telemetry and a real-process end-to-end test harness. **Alternatives considered** Keep the file bridge as the only transport. This avoids new channel behavior but does not provide persistent duplex operation for supported sandbox providers. **Roadmap alignment** This change supports the Cloud / Sandbox agents section in ROADMAP.md. ## What Changed - Add the duplex bridge broker with bounded forward, response, and gateway wait budgets. - Bound concurrent requests, lifetime requests, and request-id bytes before retention or forwarding. - Select duplex transport only when both required gates are true. - Assign the loopback port and nonce on the host and enforce a liveness-only READY frame. - Fall back to the file bridge after invalid readiness, contamination, bind failure, or timeout. - Carry the kill switch through the server, acpx engine, and six local adapters. - Add fixed, redacted duplex telemetry with a provider allowlist. - Add a real-process end-to-end harness for readiness, round trips, loss, and teardown. - Add regression coverage for limits, loss, UTF-8 splits, concurrency, and telemetry dimensions. ## Verification - Adapter-utils, server, and Daytona typechecks pass locally. - Adapter-utils tests pass, including the codec, broker, execution-target sandbox, and real-process harness. - Server kill-switch tests pass. - Live Daytona tests pass with the required provider key and skip without that key. - The root pnpm-lock.yaml file has no diff. - The branch contains ten commits after origin/master. ## Risks - Duplex transport remains disabled unless both gates equal true. - A provider remains an untrusted boundary and needs least-privilege credentials and quotas. - The server telemetry recorder stays deferred; the default recorder does nothing. - A provider that pre-binds the host port causes a fail-closed fallback to the file bridge. - The change adds no database migration and changes no root lockfile. ## Model Used OpenAI GPT-5, exact model family GPT-5, large context window, reasoning, and tool use. The model assisted with Git handoff validation and PR preparation. The implementation commits came from the engineering worktree. ## 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 searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with Fixes: # / Closes # / Refs # OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub #NNN / github.com/paperclipai/paperclip URLs) - [x] My branch name describes the change (e.g. docs/... or fix/...) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge - [x] I searched the GitHub PR list for similar PRs and confirmed this is not a duplicate --------- Co-authored-by: Paperclip <noreply@paperclip.ing>	2026-08-22 09:01:31 -07:00
Nicky LeachandPaperclip	8161244284	feat(sandbox): add opt-in duplex command-stream foundation (capability, protocol, bounded host route, frame codec) (#11738) ... ## Thinking Path > - Paperclip provides a control plane for companies that run AI agents. > - Sandboxed agents need a safe execution path for persistent command streams. > - The existing callback transport does not provide a bounded, generic duplex route. > - The host must control capability access, route identity, protocol limits, and close behavior. > - This pull request adds an opt-in duplex command-stream foundation across the sandbox layers. > - The feature stays inert because no current provider declares the capability. ## Linked Issues or Issue Description **Subsystem affected** Cross-cutting (multiple of the above) **Problem or motivation** Sandbox command execution needs a persistent host-to-sandbox stream. The current callback bridge uses a file transport and does not provide this generic route. **Proposed solution** Add a fail-closed provider capability, generic worker protocol messages, a host-owned bounded route, cross-layer service mediation, and a versioned newline-delimited frame codec. **Alternatives considered** Keep the file transport and add feature-specific commands. This does not provide one reusable duplex contract or host-owned route bounds. **Roadmap alignment** This work supports the completed Cloud / Sandbox agents roadmap area and the safe autonomy goal in the product definition. **Additional context** The change passed a two-stage security review. The final code review verdict was approve after fixes for active-stream bounds and service-layer capability mediation. ## What Changed - Add the opt-in `duplexCommandStream` provider capability with fail-closed narrowing. - Add duplex open, write, stop, and close requests and data and exit notifications to the plugin worker protocol. - Add a host-owned route with bounds for chunk size, cumulative bytes, lifetime, protocol errors, pending requests, and pre-bind buffering. - Add close acknowledgement handling with worker retirement when the close remains unconfirmed. - Wire `openDuplexChannel` through the execution target, runtime service, and plugin worker. - Add a versioned frame codec with shared wire-compatibility vectors and split UTF-8 handling. ## Verification - `server/src/__tests__/plugin-worker-manager-duplex.test.ts` passes 18 tests. - `server/src/__tests__/environment-execution-target-duplex.test.ts` passes 11 tests. - `packages/adapter-utils/src/duplex-frame-codec.test.ts` passes 38 tests. - `server/src/__tests__/sandbox-capability-contract.test.ts` passes 15 tests. - Setup-token pseudo-terminal regression tests pass 47 tests. - Server TypeScript check passes. - Continuous integration will run the full required test, typecheck, build, and policy checks. ## Risks - Providers that opt into the capability must implement the complete worker protocol. - Route limit defaults can close a stream when a workload exceeds the configured bounds. - The capability remains disabled for current providers, so current production behavior does not change. ## Model Used OpenAI GPT-5 (`gpt-5`), with tool use and code execution. The model reviewed and prepared this pull request from the supplied implementation and verification record. ## 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 searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes: #` / `Refs: #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge --------- Co-authored-by: Paperclip <noreply@paperclip.ing>	2026-08-19 13:39:13 -07:00