Files
PaperClipAI/doc
DottaandPaperclip 14c7efa068 fix(workspaces): enable UI hot reload by default (#12612)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work
> - Managed worktrees can run a Paperclip development server for each
task
> - The managed runtime used the built UI when its service did not set
the UI development middleware option
> - This made new UI source changes require a manual build instead of a
hot reload
> - The runtime must supply the development default while it must keep
an explicit operator choice
> - This pull request enables the UI development middleware for new
managed Paperclip development services
> - The benefit is that UI edits appear in the managed worktree browser
without a manual build

## Linked Issues or Issue Description

**What happened?**

A new managed Paperclip development worktree served the built UI by
default. An operator had to set `PAPERCLIP_UI_DEV_MIDDLEWARE=true`
before UI source changes could hot reload.

**Expected behavior**

New managed Paperclip development worktrees must enable the UI
development middleware by default. An explicit
`PAPERCLIP_UI_DEV_MIDDLEWARE=false` value must continue to disable it.

**Steps to reproduce**

1. Start a managed Paperclip development service without
`PAPERCLIP_UI_DEV_MIDDLEWARE`.
2. Open its UI.
3. Change a UI source file.
4. Observe that the browser does not receive the change until the UI is
built again.

**Paperclip version or commit**

This was reproduced on `317394456` from `master`.

**Deployment mode**

Local development with a managed worktree runtime.

## What Changed

- Set `PAPERCLIP_UI_DEV_MIDDLEWARE=true` for managed `paperclip-dev`
services when the service does not set a value.
- Keep explicit service values, including `false`.
- Add a regression test and document the default and the opt-out.

## Verification

- `pnpm --filter @paperclipai/server exec vitest run
src/__tests__/workspace-runtime.test.ts -t "enables UI dev middleware by
default"`
- `pnpm -r typecheck`
- `pnpm build`
- `pnpm test:run` completed with 5,397 passing tests. Four existing
runtime-port tests could not use ports `42000` and `52000` because a
live managed runtime owns those ports on this host. The new regression
test passed separately.

## Risks

- Risk is low. The change applies only to managed services named
`paperclip-dev`.
- A service can keep the built UI by setting
`PAPERCLIP_UI_DEV_MIDDLEWARE=false`.
- There is no database or API contract change.

> 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-5.6-sol`, hosted Codex context window, high
reasoning, tool use, code execution, and multi-file repository editing.

## 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>
2026-09-01 10:06:53 -05:00
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