## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work
> - Apps let people give agents governed access to external providers
> - Paperclip Cloud brokers shared provider authorization for managed
stacks
> - The managed flow sent the browser through a confirmation page after
the tenant had already prepared sign-in
> - A lost confirmation response could also show an expired-session
error before the provider page opened
> - This pull request adds an opaque handoff contract and one shared
tenant coordinator
> - The benefit is a direct and recoverable transition from Paperclip to
every Cloud-brokered provider
## Linked Issues or Issue Description
**What happened?**
A managed Paperclip Cloud connection opened the Cloud confirmation
route. A response-loss race could show an expired-session error while
the authorization still continued.
**Expected behavior**
The current Paperclip loading state must stay visible while the tenant
exchanges an opaque session. The browser must then open the provider
directly. Self-hosted and direct OAuth must keep their existing
behavior.
**Steps to reproduce**
1. Open Apps on a Paperclip Cloud stack.
2. Start a managed provider connection.
3. Select Continue to sign in.
4. Observe that the browser visits the Cloud confirmation route before
it reaches the provider.
**Paperclip version or commit**
`b872cd3d1b404bdaff70af493a2973ceb7e5d6ec`
**Deployment mode**
Paperclip Cloud hosted stack.
No related open issue or pull request was found in the repository
search.
## What Changed
- Add a backward-compatible opaque Cloud handoff to the shared OAuth
start contract.
- Validate the Cloud descriptor on the server and expose no
browser-selected endpoint.
- Exchange managed handoffs through one fixed same-origin route in every
Apps OAuth launcher.
- Keep dialog popups reserved before asynchronous work and retain the
tenant loading state.
- Add recent-login resume storage, bounded retry behavior, terminal
tenant errors, tests, and Storybook states.
## Verification
- `pnpm check:token-gates`
- `pnpm -r typecheck`
- Focused connector and UI suites: 184 passed and 202 skipped.
- `pnpm build`
- `pnpm build-storybook`
- The full local suite reached one unrelated macOS path-alias failure.
The untouched test expected `/var/...` and received the equivalent
`/private/var/...`. The same test reproduces in isolation.
## Risks
- A malformed managed descriptor now fails closed in Paperclip instead
of opening a URL.
- A legacy Cloud deployment can omit the descriptor. Paperclip then uses
the existing validated confirmation URL.
- Direct provider OAuth and self-hosted flows do not receive a handoff
and remain unchanged.
- Rollback is a normal revert of this commit because the contract is
optional and backward compatible.
> 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-5.6, reasoning mode, tool use, code execution,
and browser verification.
## 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
- [ ] 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>
5f87090894