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Nicky LeachandPaperclip b2752b21d5 fix(adapter-utils): allow process sessions without birthtime (#12451 )

## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - Remote agent adapters use a process-session wrapper inside a
sandbox.
> - Some supported sandbox filesystems do not report inode creation
time.
> - The wrapper rejects a zero creation time before it launches the
agent.
> - This pull request accepts that filesystem shape and keeps the
existing change-time probe.
> - The benefit is that valid sandbox runs can start without a
birth-time field.

## Linked Issues or Issue Description

**What happened?**

The remote process-session wrapper exited before it launched the agent
when the sandbox filesystem reported `birthtimeMs` as zero.

**Expected behavior**

The wrapper must start on a filesystem that does not report inode
creation time.

**Steps to reproduce**

1. Start the remote process-session wrapper.
2. Make `lstat()` report a zero `birthtimeMs` for its session directory.
3. Observe that the pre-fix wrapper terminates before the child process
starts.

**Paperclip version or commit**

Reproduced from `66e1c0df8b23cb8354b36dd446d9548dc4389191`.

**Deployment mode**

Self-hosted server with a remote sandbox runtime.

## What Changed

- Allow a zero reported creation time for process-session directories.
- Keep the probe that rejects a creation time copied from change time.
- Add a regression test that launches and stops a session with zero
birth time.

## Verification

- `npx vitest run
packages/adapter-utils/src/execution-target-stdin-race.test.ts`
- `pnpm --filter @paperclipai/adapter-utils typecheck`

## Risks

A filesystem without creation time can reduce the precision of
sandbox-local path-swap detection. This change does not change host-file
or Paperclip API authority. A follow-up will review that larger security
posture alignment.

> I checked `ROADMAP.md`. This is a focused compatibility bug fix for
the existing sandbox-agent roadmap area.

## Model Used

OpenAI Codex — GPT-5.6. The exact deployment suffix and context-window
size are not exposed. The model used reasoning, shell tools, and code
execution.

## 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>

2026-08-28 10:33:22 -07:00

src

fix(adapter-utils): allow process sessions without birthtime (#12451 )

2026-08-28 10:33:22 -07:00

CHANGELOG.md

fix: bound workspace Git scans (#11572 )

2026-08-17 22:11:30 -05:00

package.json

build(deps-dev): bump typescript from 5.9.3 to 7.0.2 (#11880 )

2026-08-25 14:49:05 -07:00

README.md

PAPA-430: workspace finalize gates + no-remote-git enforcement (#6969 )

2026-05-29 08:25:29 -07:00

tsconfig.json

…

README.md

@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.

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) to remoteDir before the run starts. Runs with no git remote configured.
restoreWorkspaceFromSshExecution({ spec, localDir, remoteDir, ... }) — syncs the remote cwd back into localDir after the run, including any new commits the agent created. Also runs with no git remote configured.

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.