## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - The Paperclip Runner keeps durable run and provider state outside
one server process.
> - A server restart can leave that runner alive or can interrupt it
after a provider checkpoint.
> - The old startup path used handoff intent and PID evidence, but it
did not reconstruct native ownership.
> - That gap could block the issue, create a replacement run, or start
duplicate provider work.
> - This pull request adds durable same-run recovery for coordinated and
uncoordinated restarts.
> - The benefit is exact recovery of the run, runner, session, provider,
steering, and finalization state.
## Linked Issues or Issue Description
Refs #9628. That pull request added earlier local-adapter hot-restart
work. This change adds native PRP authority reconstruction and same-run
provider resume.
Refs #10935. That pull request handles missing hot-restart snapshots.
This change also supports hard restarts with no snapshot.
Refs #11624. That pull request prevents unsafe retry after an adopted
legacy process exits. This change reconciles native terminal evidence
before provider recovery.
Refs #12070. That pull request improves process liveness checks. This
change also binds recovery to a process-start fingerprint and fails
closed on ambiguity.
**What happened?**
The server could record hot-restart intent, but startup did not rebuild
native runner ownership. A live runner could not re-register its PRP
authority. A dead runner could not resume the exact native and provider
session on the same heartbeat run. Generic recovery could then block the
issue or create replacement work.
**Expected behavior**
A live native runner must reconnect with the same PID and logical
identities. A dead runner must resume the same durable session and
heartbeat run with only a new operating-system PID. A proposed or
terminal result must finalize once before any provider turn starts.
Ambiguous process or session evidence must stay blocked without a signal
or duplicate spawn.
**Steps to reproduce**
1. Start a Paperclip Runner heartbeat and wait for an active provider
turn.
2. Restart only the Paperclip server, with or without a hot-restart
marker.
3. Observe that the old startup path does not reconstruct the native
control-plane authority.
4. Kill both the server and runner after a provider checkpoint.
5. Observe that the old path cannot resume the exact native session on
the original heartbeat run.
**Paperclip version or commit**
The defect was reproduced from commit
`1991f31fd53e7f7794d5c2e4b93be384ade2b41d`. This branch is rebased onto
the current `master`.
**Deployment mode**
Local development and self-hosted server deployments that use the local
Paperclip Runner.
## What Changed
- Added correlated hot-restart requests and version-compatible native
handoff fields.
- Added controller boot identity, process-start identity, controller
generation, recovery state, request id, and bounded history to the
native finalization ledger.
- Added transactional recovery claims for live-runner reattach,
dead-runner resume, and incomplete bootstrap.
- Added fail-closed ownership takeover rules and process identity
validation.
- Added live runner adoption to the local runner transport without a
duplicate spawn.
- Added same-run provider checkpoint resume and legacy retry-row
compatibility.
- Reconciled proposed and terminal results before runner or provider
recovery.
- Bound the HTTP and PRP listener before startup recovery and delayed
scheduling and generic reapers until classification completes.
- Added restart-aware health diagnostics, run-log recovery transitions,
durable runner diagnostics, and bounded shutdown finalizer draining.
- Moved restart-survivable diagnostics into runner-owned, pre-redacted
bounded writes; raw stdout and stderr are never persisted.
- Added process-start fencing for controller, runner, and provider PIDs;
startup classifies every candidate without an implicit cap.
- Added crash-recoverable, contention-safe development restart-request
coordination and failed-startup listener cleanup.
- Added a credential-free real-process restart suite for eight restart,
scale, and identity scenarios.
- Documented native restart operation, persistence, diagnostics, and
verification.
## Verification
- The documented native restart commands passed. They ran eight
real-process/database recovery scenarios and the live runner adoption
transport test.
- Native executor tests passed: 111 tests.
- Heartbeat recovery tests passed: 124 tests.
- Hot restart, health, and shutdown tests passed: 52 tests.
- The broader affected server suite passed: 350 tests.
- Focused native recovery and startup tests passed: 49 tests.
- Runner transport and control-plane tests passed: 63 tests.
- Runner-owned diagnostic tests passed for write-time bounding,
credential redaction, private file modes, and raw stream
non-persistence.
- Development restart coordination tests passed: 11 tests.
- Database migration checks and the partial-application/replay
regression test passed.
- Server, database, and Paperclip Runner typechecks passed.
- `git diff --check` passed.
- Full Paperclip PR CI passed, including build, canary, all five general
server shards, all five serialized server shards, all three browser E2E
shards, workspace suites, and release-registry verification.
- Greptile completed at 5/5 with no outstanding findings,
recommendations, follow-ups, or open review threads.
## Risks
- Moderate risk. This changes startup ordering and ownership transfer
for active native runs.
- The migration adds nullable columns and does not rewrite existing
rows.
- Recovery fails closed when process or durable session identity is
incomplete or contradictory.
- The first implementation supports the local Paperclip Runner. Remote
targets keep their existing behavior.
- The real-process suite covers cleanup and asserts that no runner or
provider process survives each test.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI Codex with GPT-5. The runtime did not expose a more specific
model revision or context-window size. Repository editing, shell
execution, database tests, and real-process test execution were enabled.
## 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
## Thinking Path
> - Paperclip operators spend most of their time scanning the board,
inbox, sidebar, and local dev status surfaces
> - Small UI and dev-ops frictions make repeated operator workflows feel
slower than they need to be
> - The working branch contained several independent quality-of-life
improvements mixed with larger cloud work
> - Grouping these smaller UI/dev-ops changes together keeps review
overhead reasonable without merging them into feature PRs
> - This pull request collects the operator-facing QoL polish into one
standalone branch
> - The benefit is a cleaner board navigation and local dev recovery
experience without depending on cloud upstream sync
## What Changed
- Relaxed forced 44px touch targets for small inline widgets.
- Fixed mobile mention menu scrolling and sidebar spacing on
touch/mobile layouts.
- Synced inbox hover state with j/k selection.
- Moved plugin sidebar entries into the Work section.
- Added manual dev-server restart action/banner behavior.
- Logged plugin bridge 502 causes for better diagnosis.
## Verification
- `pnpm install --frozen-lockfile --ignore-scripts`
- `pnpm --filter @paperclipai/plugin-sdk build`
- `pnpm exec vitest run ui/src/components/MarkdownEditor.test.tsx
ui/src/components/Sidebar.test.tsx
ui/src/components/SidebarProjects.test.tsx ui/src/pages/Inbox.test.tsx
ui/src/components/DevRestartBanner.test.tsx
server/src/__tests__/dev-server-status.test.ts
server/src/__tests__/health-dev-server-token.test.ts
server/src/__tests__/plugin-routes-authz.test.ts` initially failed only
because plugin SDK `dist` was not built in the fresh worktree.
- Rerun after build: `pnpm exec vitest run
server/src/__tests__/plugin-routes-authz.test.ts` passed.
- The remaining targeted UI/dev-server tests passed on the first
post-install run.
## Visual Evidence
- Sidebar layout and plugin Work section: 
- Inbox/task row selection and hover-state surface: 
- Dev restart banner desktop: 
- Dev restart banner mobile: 
## Risks
- Mostly UI/dev ergonomics with low data risk.
- Sidebar and inbox changes touch frequently used navigation surfaces,
so visual review on desktop/mobile is still useful.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI Codex, GPT-5-based coding agent with local shell/git/tool use.
Exact hosted model ID and context-window size are not exposed by the
local Paperclip adapter runtime.
## 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 run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
Dotta
dotta
