## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - Sandbox agents use the callback bridge to call the Paperclip API. > - The bridge round-trip test checks request delivery and credential removal. > - #12785 added an accepted API-key request before the feedback request. > - The feedback assertions still read request 2, which is now the GitHub credentials request. > - This PR checks request 3 and verifies that all four accepted requests reached the host. > - This restores the shared test gate while retaining the Unicode payload and token checks. ## Linked Issues or Issue Description Related PR: #12785 introduced the stale feedback index. The reported failure appears on #16486 and master. Searches for `workspaces-b`, `sandbox-callback-bridge`, `surrogate`, and `EncoderFallbackException` found no duplicate fix. **What happened?** The `General tests (workspaces-b)` job fails on PRs and master. The hosted PR job and AWS master job both report `System.Text.EncoderFallbackException` for an unpaired `\uD83D`. The runner exits during the test step and does not upload that step's log. The unchanged master test reproduces a deterministic assertion failure at the feedback request. It compares `/runtime-tools/github/credentials` with `/api/companies/company-1/agent-commentary` and prints a diff containing 5,000 crying emoji. The assertion output is the likely trigger for the runner's Unicode logging crash. - [Reported PR job](https://github.com/paperclipai/paperclip/actions/runs/38818474563/job/116719880033) - [Master job with the same runner exception](https://github.com/paperclipai/paperclip/actions/runs/38821128038/job/116717690951) **Expected behavior** The test checks the actual feedback request, verifies its full payload, and confirms that its authorization header is removed. Both shared CI lanes complete normally. **Steps to reproduce** 1. Check out master at `c4a16cbe981f96e2756c7014103c88da67e5514f`. 2. Install dependencies with pnpm 9.15.4. 3. Run `node_modules/.bin/vitest run packages/adapter-utils/src/sandbox-callback-bridge.test.ts -t 'round-trips localhost bridge requests'`. 4. Observe the feedback assertion reading the preceding GitHub credentials request. **Paperclip version or commit** Master at `c4a16cbe981f96e2756c7014103c88da67e5514f`. **Deployment mode** Built from source. GitHub-hosted PR CI and AWS post-merge CI. ## What Changed - Assert that four accepted requests reached the host. - Check feedback delivery and authorization stripping on request 3. - Retain the large Unicode payload and all existing authentication checks. ## Verification - Unchanged master: the focused round-trip test fails at the stale feedback index. - Fixed branch: all 68 tests in `sandbox-callback-bridge.test.ts` pass with real localhost gateways. - `pnpm --filter @paperclipai/adapter-utils typecheck` passes. - `git diff --check` passes. - Exact CI group: `node scripts/run-vitest-stable.mjs --mode general --group general-workspaces-b` passes (4,800 tests passed, 28 skipped across 17 projects). - `pnpm --filter @paperclipai/adapter-utils build` passes. - Greptile reviewed current head `3de15d3374354809ea84ca4df5f93c2473715f02`: 5/5, success, no comments or actionable findings. - All GitHub checks pass on current head `3de15d3374354809ea84ca4df5f93c2473715f02`: 55 successful checks and 2 intentional skips, including `workspaces-b`, build, typecheck, Runner verification, and e2e. - Full local `pnpm test:run` was started and stopped after the CI test lanes passed; it did not complete locally. No worktree-owned test processes remained afterward. - Full local typecheck and build were attempted. Both stop at the Runner Rust commands because `cargo` is absent from the shell PATH. The changed package typecheck passes. The complete repository typecheck and build pass in CI. - The first sandboxed local reproduction could not bind localhost (`EPERM`). It was repeated with listener permission and reached the deterministic assertion failure described above. ## Risks Low risk. This changes three test lines. Runtime behavior, credentials, workflow settings, and payload coverage stay the same. The GitHub runner Unicode logging defect remains upstream; this fix removes the incorrect assertion that triggers it in this test. ## Model Used OpenAI GPT-6 in Codex, with reasoning, repository inspection, and command execution. The exact runtime model identifier and context window size are not exposed in this session. ## 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 #` 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>
@paperclipai/adapter-utils
Shared utilities for Paperclip adapters: process spawning, environment injection, sandbox/SSH transport, workspace sync, and the round-trip helpers that move code between the local execution-workspace cwd and wherever the agent actually runs.
For the adapter-author guide see
docs/adapters/creating-an-adapter.md
and the in-repo notes at packages/adapters/AUTHORING.md.
Sandbox bridge deadlines
Command-managed bridge control operations (queue reads, input delivery, setup, and cleanup) have a host-enforced deadline of at most 30 seconds per shell command. A shorter configured timeout still applies. These operations cannot inherit the agent run's hours-long lifetime or wait forever on a provider that ignores its timeout. Long-lived agent session commands keep their own limits.
A control timeout reports a transport failure. It does not prove that the remote command stopped and does not replay an uncertain write. The process session closes failed input delivery and uses its existing shutdown path; normal execution settlement must still verify termination.
No-remote-git contract
The local execution-workspace cwd is the only persistence boundary across runs. No adapter may depend on a git remote for cross-run state.
Adapters that run the agent on a different host should use the SSH round-trip
helpers in src/ssh.ts:
prepareWorkspaceForSshExecution({ spec, localDir, remoteDir })— bundles the local cwd (tracked files, dirty edits, untracked additions, and the git history needed to reconstruct it) toremoteDirbefore the run starts. Runs with nogit remoteconfigured.restoreWorkspaceFromSshExecution({ spec, localDir, remoteDir, ... })— syncs the remote cwd back intolocalDirafter the run, including any new commits the agent created. Also runs with nogit remoteconfigured.
prepareRemoteManagedRuntime in
src/remote-managed-runtime.ts wraps both
calls for adapters that want a per-run remote workspace and an automatic
restoreWorkspace() finally hook.
The invariant is pinned by the no-remote-git contract case in
src/ssh-fixture.test.ts, which asserts that a
remote-only commit propagates to the local worktree through the
prepare → restore round-trip with no git remote configured at any point. Do
not regress that test.