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Nicky LeachandPaperclip
6019e2bd6e
## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Paperclip runs agents in local and remote sandboxes through adapter utilities > - The HTTP/2 sandbox bridge decoded every body as UTF-8 text and rejected non-JSON content > - This stopped agents from uploading or downloading issue attachments through that bridge > - This pull request carries raw bytes, permits the two attachment routes, and enforces a shared body limit > - The benefit is correct attachment transfer with a process-wide memory guard ## Linked Issues or Issue Description **What existing behavior does this improve?** The HTTP/2 sandbox bridge forwards request bodies between an agent sandbox and the Paperclip host. It now supports binary bodies and the issue attachment routes. **Current behavior** The bridge decodes each body as UTF-8 text. It returns HTTP 415 for content types outside the JSON route list. An agent cannot upload or download an issue attachment through this transport. **Proposed behavior** The bridge carries raw bytes through the forward path. It permits the attachment upload and content routes. The queue transport and file gateway keep their existing route behavior. A shared 10 MiB body limit and process-wide byte reservation protect memory use. **Reason and benefit** Attachment clients need byte-preserving transfer. The shared limit keeps the gateway and host aligned. The reservation prevents concurrent streams from exceeding the accepted process memory ceiling. **Breaking changes** The HTTP/2 bridge accepts two attachment routes and permits binary content. The queue transport and file gateway keep their previous route lists and HTTP 415 behavior. No schema or external endpoint changes. ## What Changed - Carry request and response bodies as raw bytes through the HTTP/2 bridge. - Permit attachment upload and attachment content routes on the HTTP/2 bridge only. - Raise the resolved per-body limit to 10 MiB and share it between the gateway and host. - Reserve body bytes before allocation and release each stream reservation on every terminal path. - Document the body limit, process ceiling, and reservation behavior. ## Verification - Run `pnpm exec vitest run packages/adapter-utils/src/http2-bridge-server.test.ts packages/adapter-utils/src/execution-target-sandbox.test.ts packages/adapter-utils/src/sandbox-callback-bridge.test.ts`; 226 tests pass. - Run `pnpm --filter @paperclipai/adapter-utils typecheck`; it passes. - Run the direct server TypeScript check with `tsc --noEmit` in `server/`; it passes with zero errors. - Verify multipart upload and binary download round trips over HTTP/2 without corruption. - Verify the queue transport and file gateway return HTTP 415 for the same routes. - Verify the host rejects bodies over the resolved limit. - Verify a denied reservation returns HTTP 503 and allocates no copy. - Verify stream cleanup releases reservations after completion, error, abort, timeout, and close. ## Risks The bridge now accepts larger bodies and binary content. The process-wide reservation limits total live body bytes to 1 GiB. Route behavior changes only for the HTTP/2 bridge. The security review found no blocking issue for this commit range. ## Model Used OpenAI Codex, GPT-5. The runtime used tool calls and code execution. The runtime did not expose the context window size. No model-generated code changes were made for this pull request. ## 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>