## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - Operators often open self-hosted Paperclip over plain HTTP on a LAN
or private network.
> - Browser Clipboard API writes are not reliable in that insecure
context.
> - Paperclip already has one shared helper with a legacy copy fallback,
but many current copy actions bypass it.
> - This pull request routes every core UI copy action and the
first-party workspace-diff plugin through the shared helper.
> - The benefit is consistent copy behavior on HTTPS, localhost, and
plain-HTTP private deployments.
## Linked Issues or Issue Description
Refs #3529.
This change supersedes the stale prior attempt in #3531. Current master
has more copy surfaces and a first-party plugin UI bridge that the prior
branch does not cover.
## What Changed
- Replaced direct Clipboard API writes and duplicate fallback
implementations across the current core UI with `copyTextToClipboard`.
- Added an HTTP-safe clipboard function to the plugin UI SDK and wired
the host bridge to the same implementation.
- Migrated the first-party workspace-diff plugin to the plugin SDK
clipboard function.
- Added unit coverage for native rejection fallback and plugin host
delegation.
- Added a source-level regression test that rejects new direct clipboard
writes outside the shared implementation.
- Documented the plugin UI clipboard function.
## Verification
- `NODE_ENV=test pnpm exec vitest run ...` for 14 affected suites: 164
tests passed.
- `pnpm exec vitest run tests/ui-clipboard.test.ts` in
`packages/plugins/sdk`: 1 test passed.
- `NODE_ENV=test pnpm -r typecheck`: passed for 31 workspace projects.
- `NODE_ENV=test pnpm test:run`: passed.
- `NODE_ENV=production pnpm build`: passed.
- `pnpm check:token-gates`: passed with all gates clean.
## Risks
Low risk. Secure contexts still use the modern Clipboard API. Plain HTTP
and rejected modern writes use the existing `execCommand("copy")`
fallback. That API is deprecated, but it is the compatibility path
required for insecure contexts. The change has no schema, API, or visual
design effect.
> 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`. The runtime did not expose a context-window
size. Reasoning, tool use, repository editing, test execution, and
GitHub CLI access 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
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
## Thinking Path
> - Paperclip gives operators a workspace diff plugin so they can
inspect agent changes before review
> - The diff view needs reliable base-ref defaults and controls that
stay usable while scrolling large diffs
> - The working branch mixed those plugin improvements with unrelated
server and cloud work
> - Keeping the workspace diff plugin changes isolated makes them easy
to test and review
> - This pull request polishes the workspace diff plugin controls,
base-ref behavior, and sticky headers
> - The benefit is a more predictable diff review surface for agent
workspaces
## What Changed
- Fixed workspace diff default base-ref resolution.
- Improved split/unified and working-tree/against-ref pane controls.
- Made workspace diff headers stay sticky while scrolling.
- Added a review screenshot at
`screenshots/PAP-9841-workspace-diff.png`.
## Verification
- `pnpm install --frozen-lockfile --ignore-scripts`
- `pnpm --filter @paperclipai/plugin-sdk build`
- `pnpm --filter @paperclipai/plugin-workspace-diff exec vitest run
tests/plugin.spec.ts`
- Result: 9 tests passed.
## Risks
- UI-only plugin branch with low data risk.
- The default base-ref inference should be reviewed against unusual
worktree/upstream combinations.
> 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>
## Thinking Path
> - Paperclip orchestrates AI agents for zero-human companies.
> - Operators need to inspect what agents changed inside execution and
project workspaces.
> - The existing workspace detail views did not provide a first-party
rich diff surface for staged, unstaged, head, renamed, binary,
oversized, and untracked changes.
> - The plugin system is the intended extension point for optional rich
UI surfaces.
> - This pull request adds a workspace diff plugin plus host services
and shared contracts so Changes tabs can render workspace diffs through
plugin slots.
> - The diff-renderer dependency should stay owned by the plugin package
rather than the core UI app.
> - The dependency surface must stay aligned with repository PR policy,
including intentionally omitting `pnpm-lock.yaml` from the PR.
> - The benefit is a more reviewable workspace surface without
hard-coding the renderer into every page.
## What Changed
- Added `@paperclipai/plugin-workspace-diff`, including diff
normalization, plugin manifest/worker/UI entrypoints, and focused plugin
tests.
- Kept `@pierre/diffs` scoped to `@paperclipai/plugin-workspace-diff`;
removed the core UI lab diff-renderer surface and direct UI package
dependency.
- Added shared workspace diff types and validators, plus plugin SDK
surface for workspace diff host services.
- Added server workspace diff service support and route coverage for
execution/project workspace diff flows.
- Wired Execution Workspace and Project Workspace Changes tabs to load
the diff plugin, including loading/error fallback behavior.
- Added UI tests and fixtures for the Changes tabs and plugin bridge
behavior.
- Added the new plugin package manifest to the Docker deps stage so PR
policy can validate dependency coverage.
- Addressed review hardening around empty untracked patches, workspace
path exposure, project workspace read capability checks, and default
base refs.
## Verification
- `pnpm --filter @paperclipai/plugin-workspace-diff test`
- `pnpm exec vitest run
packages/shared/src/validators/workspace-diff.test.ts
server/src/__tests__/workspace-diff-service.test.ts
ui/src/pages/ProjectWorkspaceDetail.test.tsx
ui/src/pages/ExecutionWorkspaceDetail.test.tsx`
- `pnpm exec vitest run ui/src/plugins/bridge.test.ts
server/src/__tests__/workspace-runtime-routes-authz.test.ts`
- `pnpm --filter @paperclipai/shared typecheck`
- `pnpm --filter @paperclipai/plugin-workspace-diff typecheck`
- `pnpm --filter @paperclipai/server typecheck`
- `pnpm --filter @paperclipai/ui typecheck`
- `node ./scripts/check-docker-deps-stage.mjs`
- Browser screenshot captured from the local worktree dev server:
https://files.catbox.moe/ofdpsp.png
- Confirmed branch is rebased onto `public-gh/master`,
`.github/workflows/pr.yml` is not included in the PR diff,
`ui/package.json` is not included in the PR diff, and `pnpm-lock.yaml`
is not included in the PR diff.
## Risks
- Medium UI integration risk: the Changes tab depends on the plugin slot
and host diff service path.
- Medium dependency risk: this adds `@pierre/diffs` in the plugin
package, but `pnpm-lock.yaml` is intentionally omitted per packaging
instructions because repository automation manages lockfile updates.
- Current CI blocker: downstream frozen installs fail until the
repository policy path for new plugin package dependencies is chosen.
- Diff rendering edge cases are covered for common working-tree and head
diff states, but very large repositories may still expose performance
limits.
- No migrations are included.
> 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 class coding model, tool-enabled local execution
environment. Exact context window was not exposed by the 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>
dependabot[bot]
Dotta
