## Thinking Path > - Paperclip manages AI agents and their work. > - A child task can inherit its parent's remote workspace. > - The remote workspace permits one writer until that writer saves its files. > - Reservation reports an active writer as a generic setup failure. > - The existing shared workspace wait does not cover inherited isolated workspaces or a race at reservation. > - This pull request sends verified active writer contention through the existing scheduled retry path. > - The child keeps a live execution path while unfinished files remain protected. ## Linked Issues or Issue Description **What happened?** A native sandbox task inherited an isolated remote workspace from its running parent. Setup failed with `The workspace still has an unfinished writer or save operation.` The child became blocked before provider execution and had no scheduled continuation after the parent saved. **Expected behavior** The child waits for the active writer through the existing workspace retry path. It keeps its workspace binding. A stale writer or a stopped writer with unfinished saves still requires reconciliation. **Steps to reproduce** 1. Start a native sandbox task with remote workspace storage. 2. Create a child that inherits its isolated workspace or operator branch while the parent is still writing. 3. Start the child. On the old code, atomic reservation raises a generic setup failure. **Paperclip version or commit** Observed on `410b0e27015495ab8951768b5b0b94727de33785`. Regression reproduced on source based on `554a770c6f8e48e327e19f5208b575a5ec5bce30`. **Deployment mode** Authenticated managed server, external PostgreSQL, native Codex with a Daytona sandbox. The failed attempt stopped before runtime selection or provider startup. Related: #18611 permits inherited remote bindings. #16371 adds waits for reused shared execution workspaces. This repair handles active writer contention at atomic remote reservation. #17156 proposes a separate change to task workspace inheritance. ## What Changed - Return a typed conflict with the exact active writer from the remote reservation owner. Keep company, binding, access, and writer checks in that transaction. - Translate a recent running writer into the existing heartbeat workspace wait. Keep stale, unknown, stopped, dirty, and uncertain save fences. The writer task lookup uses its primary key. - Preserve the admitted assignee role across preparation so reassignment cannot turn an old owner into a guest retry. - Add PostgreSQL regressions for isolated workspaces, operator branches, native writer identity, unchanged saved authority, admission after save, durable retry, Stop, and reassignment before contention reaches the wait handler. - Update the development guide and workspace verification recipes. ## Verification - Red: both inherited isolated/operator preparation cases fail on the old code. They receive `HttpError(remote_workspace_writer_pending)` instead of a workspace wait. No provider or allocation starts. - Green: those same cases pass after the repair. The assembled public heartbeat cases also pass: one scheduled retry owns the task lock, no sandbox lease is created, the original writer and saved authority remain unchanged, and Stop prevents retry promotion. - Ownership race red/green: changing the assignee during preparation produced `wasIssueAssignee: false` before the review fix. The same regression now preserves its original role. A real transaction fault boundary also reassigns the task after reservation rejects it and before the wait handler runs; promotion cancels that retry with `issue_reassigned`. - Test isolation: an initial combined placement cached the synthetic S3 run-log backend and failed twelve later preparation cases. The assembled native tests now have their own process. The ordered reproduction and all four complete affected suites pass after that change: 171 tests, zero skipped. - Four additional saved-file lifecycle cases pass against disposable Docker PostgreSQL 17 with independent filesystem execution and local object storage. They restore inherited shared, isolated, and operator-branch files on a new allocation and retain the second-writer fence. The other 42 cases in that file were outside the selection. - `pnpm -r typecheck`, `pnpm build`, `node scripts/check-maps.mjs`, and `git diff --check` pass on the final source. - The earlier `pnpm test:run` passed all six chat shards: 1,828 tests. Its remaining general-server phase was interrupted after final-head CI passed. That local command began before the review fix and is not a complete local full-suite pass. - Final head `096235d8fc80033f92d8de1fcfa9835795ba0456`: 54 successful checks/statuses, three skipped checks, and two neutral checks. None is pending or failed. All build, typecheck, general/serialized tests, Runner checks, and eight browser E2E shards pass in [CI](https://github.com/paperclipai/paperclip/actions/runs/41544310900). The PR is mergeable with no conflicts. - Greptile is 5/5 on that exact head. Its ownership finding is resolved and no review thread remains open. Paperclip Review also reports 5/5 with no findings; its check conclusion is neutral. Its earlier status-conflict recovery completed through the ordinary review request path. - Local environment: macOS arm64, Node 26.4.0, pnpm 9.15.4, isolated native PostgreSQL and the disposable PostgreSQL 17 lifecycle fixture. The acquisition boundary is controlled in the focused preparation cases. No live Codex/Daytona replay is claimed: the local environment and test configuration lack the required test credentials. - No deployment, merge, or original task recovery is claimed. ## Risks - Incorrect contention classification could retry a stopped or unverified writer. Only a running writer with a same-company task and recent activity enters the wait path. Stale and terminal dirty cases retain the conflict. - Retries must not start another executor or release unsaved files. Reservation remains atomic. The tests check unchanged writer authority, no allocation before release, one durable retry, retained binding, Stop, and reassignment before the conflict is caught. - No API schema, database migration, provider configuration, model, credential, trust, or approval changes. ## Model Used - OpenAI `gpt-6.1-sol` through Codex. The context window size is not exposed in this session. Used reasoning, tool use, code execution, and browser diagnostics. No sub-agents were used. ## 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 — targeted and chat results are recorded above; the full local command was interrupted - [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>
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Workspaces, services, and files
A project or task can use a managed workspace with inspectable files, Git state, services, and runtime controls. Operators can follow its lifecycle through provisioning, use, and closure.
Feature ID: workspaces.
Implementation: workspace list, execution workspace, project workspace.
Agent access: companion.
Sub-features
binding:workspaces/binding— identify the workspace actually bound to a task/run.provisioning:workspaces/provisioning— observe readiness and failures instead of inferring readiness from a created record.services:workspaces/services— start/stop supported services and inspect logs and exposed endpoints.files-git:workspaces/files-git— inspect workspace files and repository state used for the deliverable.closure:workspaces/closure— close/reopen or reconcile through permitted controls without losing work.
For a historical failed export whose exact sandbox was destroyed, the task recovery notice offers Continue from saved sources to an authorized board operator. Select surviving task attachments, record lost work and external action outcomes, then rebuild through fresh-session admission. The old failed run remains failed. Bounded bootstrap retries retain this decision and recheck their system wake, predecessors, saved files and current execution gates before provider startup. Later cancelled runs require their own confirmed stop and board file repair. Their evidence is preserved with the reconstruction and rechecked before dispatch. Stop retains unfinished native files; startup also repairs missing historical retention without replaying the cancelled turn. Daytona stop-only cleanup confirms retention and accepts an already archived source. Cancelled native file recovery can record a verified no-action outcome. Its confirmation stays optional and resets when the source changes. Retained sandboxes keep their existing export recovery path. Automated coverage: reconstruction. Live staging acceptance remains separate from these regression tests.
How to get to it (user POV)
task-workspace
Use the task’s workspace card or Files panel and follow its workspace link.
Native artifact-copy verification: in an admitted standard-mode task, save a
synthetic API response and call download_artifact with its saved identity and a
new workspace-relative filename. Independently inspect the file's complete byte
count and SHA-256 through the admitted filesystem. Retry the identical request;
reject a conflicting destination, symlink, revoked authority and foreign artifact.
The transfer does not change the content's untrusted status. See
API tools for support
and limits. Provider-free regression evidence is not live remote qualification.
workspace-management
Open /workspaces, a project workspace, or /execution-workspaces/:workspaceId and its Services/Configuration/Runtime logs views.
Driving it with Playwright and the Paperclip CLI
Preconditions: follow the baseline. Enable isolated-workspace UI where needed. Use an owned disposable repository and environment; record workspace ID and branch.
task-workspace
Automated: workspace card and task binding cover host/binding contracts.
Manual: Run a task that writes a small file, follow the bound workspace, and inspect the file and revision. Reload and verify links still refer to the same workspace, not another checkout or a stale run.
For experimental native remote storage, follow the
deployment prerequisites and explicit local import.
With durable Postgres, S3, and a stable key configured, a new disposable
Paperclip Runner sandbox task with a supported fresh source enrolls by default.
Verify an explicit remoteWorkspaceStorageEnabled: false disables new enrollment,
and an existing host workspace or configured local folder stays on its legacy
path until explicitly imported. An enrolled workspace must keep remote authority
when enrollment is disabled and fail admission if persistence prerequisites are
lost. Write ordinary/binary files and, for Git, staged, unstaged, and unpushed
work. Finish the run and inspect its saved version. Replace the webserver and
verify the next task turn uses the same remote folder without a controller
checkout. Then release the saved allocation and verify a new one restores the
files, Git state, and managed same-project repositories without the old sandbox
or original Git remote. Read-only cross-project referenced folders must fail
admission. Separate workspaces may run concurrently; shared concurrent writers
must be rejected.
Repeat remote capture with enough free space for the archive and normalized Git metadata, but not another working-tree copy. Verify saved files and Git state after restore. A concurrent file change must fail capture without publishing a receipt or retaining a partial archive. The portable archive suite checks the space allowance and concurrent-change boundary; its filesystem quota is controlled test input, not a live sandbox qualification.
Create a child that inherits a saved isolated workspace or operator branch. Verify it continues the same files after the prior writer saves, including on a new allocation. Two bound children must not acquire concurrent writer authority. Start the child while its parent is still writing. Verify it waits with one scheduled retry and retains its workspace binding without acquiring an allocation. Stop the waiting task and verify that the retry cannot execute. A stale writer or a stopped writer with unfinished saves must remain fenced. Reassign the child during preparation before reservation reports contention; retry promotion must cancel the former assignee's run without starting it. The reservation regression and saved-file lifecycle suite exercise inheritance, access checks, and file continuity with real PostgreSQL. Their filesystem transport is local test execution, not live sandbox/provider proof.
The Files panel must label Live workspace or Saved copy with its save time. Confirm browse, preview, and download agree. A missing allocation with unsaved work must report unavailability rather than show an old save as current. After a final save clears dirty state and writer authority, Files must read the current committed saved version even while the old allocation is still recorded or its read transport is unavailable. Confirm the original bytes and Saved copy label; a new writer or dirty state must retain the live-read requirement. Clear the recorded allocation while a saved preview is loading: the pinned copy must remain readable. Epoch, snapshot, source, writer, dirty-state, and foreign or reintroduced location changes must still reject the read. Live reads keep their physical-location fence, and all private saved copies must be removed. Close must retain dirty/unfinished work and reject custom cleanup/teardown commands; a clean saved workspace can release compute while retaining files. Manual runtime commands, jobs, repairs, and service starts must reject remote workspaces before local filesystem access; agent task execution remains supported. The archive, storage, migration, retention, and lifecycle regression suites exercise these contracts separately. This recipe records required deployment checks; it does not claim a live provider or webserver replacement passed.
For a repository-free isolated task, complete an explicitly fresh retry, save a marker, then send ordinary new input. It must retain the bound attempt directory and marker. A later explicitly fresh retry must use a separate clean sibling. The production preparation regression uses PostgreSQL and real private directories; it also rejects changed bindings. The directory boundary suite checks namespace, missing-directory and symlink refusal. Neither suite proves a hosted provider turn.
For slow source preparation, configure a short PostgreSQL idle-transaction timeout in a disposable instance. Hold preparation beyond that interval and verify it retains its source lock, rejects competing preparation, and leaves ordinary reads available. The source-lock regression uses real PostgreSQL; it does not prove provider startup or deployed recovery.
Create an authorized task whose selected checkout is also used by private historical
tasks and many old workspace records. Start and reuse it without a historical-source
permission failure or remote-clone fallback. Verify task-bound file browsing works,
while private historical task content and operation logs remain denied through app
APIs. Root traversal and symlink escapes must remain rejected. The OS and execution
environment own isolation between agents; Paperclip does not classify existing bytes
by the task that wrote them. Existing workspace_source_restricted failures remain
inspectable and recoverable, but new preparation does not produce that failure from
filesystem history. Current trust, credential, binding, and publication checks still
apply. The preparation-history benchmark supplies local service measurements, not
provider deployment qualification.
For reconstructable Git expiration, finish a disposable task tree, run the internal lifecycle sweep after its 24-hour grace, and inspect candidate/reclaimed bytes. Advance its upstream first; use the ordinary task/workspace reopen control and verify the original commit, file contents, and subsequent persisted work. Current runs, previews, recovery, unique files and shared base clones must stay. The expiration tests exercise real local Git and database paths, interruption and concurrent reopening; cloud credentials and the deployed user journey require separate live evidence.
For task workspace selection, use the authorized task workspace API to choose a task directory, project source, or existing workspace. Verify that a change made during a run stays pending until the next normal admission. Submit another choice using the returned revision, then retry the superseded request; it must fail without replacing the newer pending choice. A projectless task must retain its files across resume and reassignment. Use the repository preparation API to add an authorized repository beneath that workspace; repeat the request and verify that it reuses the checkout and pinned revision. See task binding tests and repository access tests.
For native unfinished work, yield after preparation is staged and verify that normal admission prepares the repository and continues the same task without a timer or user message. A staging-only task that finishes must not wake again. The saved continuation must disappear when the repository is ready or belongs to another task. Source regressions cover those eligibility checks; a live provider journey is required to qualify the complete automatic resume.
An existing projectless folder alias of a sandbox-restricted project must be rejected for a standard local task before its adapter executes. Repeat after relocating the configured source; retained ownership must still enforce the boundary. This is separate from ordinary authorized file preview/download. For a registered worktree selected for a sandbox or SSH environment, configured and built-in provision scripts must not run on the controller during fresh creation, reuse, or rebuild, including host runtime provisioning. Repeat with standard trust and a protected read-only source, then with source write grants; permissions must not change execution placement. Verify isolated source copying and selected-environment dispatch still work. Repeat an explicit local isolated source choice: copying remains available but controller scripts must stay absent, including after binding or metadata changes and closed-worktree reopening. An implicit trusted local project default remains a positive provisioning control. Repeat with a newer configured default overriding an older primary source, then with a newer primary overriding an older nonprimary source. Both configured and built-in hooks must run for the implicit local default. Task creation and controller classification share configured-default, primary, creation-time and ID precedence. Explicit choices and saved copy-only markers still suppress hooks; changing the default must not rotate an existing binding or clear its marker. SSH keeps its explicit remote provision-command path; these checks do not claim a new sandbox provision transport. Low-trust closed-worktree reopening, including a board-comment reopen of a projectless task, must also suppress both kinds of host provision script. Returned checkpoints must reject file, symlink or missing parents before host writes, even if a nested file is marked unchanged. The retained host file and recovery evidence must survive rejection. These are automated safety contracts, not new live runtime acceptance.
An unchanged returned snapshot skips the host scan after acquiring the writer lock and checking authority. Concurrent host edits remain untouched; changed files, modes, symlinks and deletions still take the conflict path. The unchanged restore regression checks both hooks under the lock. This is source-level coverage, not a cloud latency result.
For a child created by an admitted agent with an explicit existing workspace, verify that a matching sandbox boundary permits creation before the child has an ID. A changed child policy, unrelated parent, or forged creator run must fail. See the child workspace trust regression. This automated contract does not add live acceptance evidence.
workspace-management
Automated: workspace detail and runtime service cover UI and runtime contracts separately.
Manual: Provision a disposable workspace, wait for readiness, start an available service, open its endpoint, and inspect a real response and logs. Stop it and verify it actually stops. Exercise close/reopen only after inspecting pending changes and active runs.
Gotchas
-
UI visibility, default isolation policy, the local environment row, a workspace record, and a running service are distinct prerequisites. A fresh instance still needs an owned cwd/repository and runtime commands;
/workspaceslists existing work. Reopening depends on lifecycle, not a generic detail action. -
A link or running badge does not prove the service is reachable from the user’s browser.
-
Workspace IDs, runtime leases, and repository paths are not interchangeable.
-
Remote workspace snapshots require external Postgres, S3, and the original encryption key. Edits after the last save still depend on the sandbox; there is no periodic workspace backup. The experiment does not remove the instance volume or establish zero-outage deployment for other data paths.
-
Terminal workspace cleanup wakes after committed task/workspace/PR/finalization changes and restores cooldown deadlines at startup. Empty lanes stop scanning. Metadata reads do not inspect storage. Providers without ancestry inspection use finalized HEAD and destination-aware GitHub proof before storage checks. Associated squash PRs need not be recorded manually; wrong HEAD/base, unreachable integration commits, or unavailable credentials retain the workspace. Compatible records share one advisory Git inspection per bounded page, while each record keeps its own delivery check. Destructive cleanup starts a separate Git scan even if an older scan is running. The worker tests cover quiet lanes and deadlines. The service tests cover real PostgreSQL signals and retained worktrees. These tests do not qualify an external wake alarm or a live provider deployment.
-
Organizational project, source project, task files, personal
AGENT_HOME, and provider home have separate meanings. Private source ownership remains attached to copied files after source configuration changes or workspace closure. -
Use recovery for divergence/export repair and CLI operations for local worktree tooling.
Storybook verification
closure
Capability ID: workspaces/closure.
Scope: ui Storybook: Close-readiness checks, pending changes/active runs, blocked/pending/error close, retry close and eligible reopening. Production: Confirm owned workspace shutdown, preserved files/Git state and permitted lifecycle transition/reopening; Browser Use session closure is unrelated. Workspace detail and operation-history reads do not inspect Git or remote storage. Delivery is unknown until explicit close readiness or lifecycle inspection. Verify that these reads work during an inspection outage, while destructive close still refuses unverified data. Sources: Source: ExecutionWorkspaceDetail.tsx, ExecutionWorkspaceCloseDialog.tsx, execution-workspaces.ts. Tests: execution-workspaces-routes.test.ts, execution-workspaces-service.test.ts, execution-workspace-reopen.test.ts