dsh-rightbar (alpha.2)

The pack's own right bar — the right-hand column of the DeepSeek Harness web GUI: the tab strip with its "+" add control, the docking panel with split / float / fullscreen, the header expand button, the Start (guide) page, the tab-type registry other plugins register into, and the keyed tab body/title seats. Alpha.

What "the pack owns it" means

The right bar is a fork: lib/client.js is a copy of the shipped @deepseek-ai/dsh-client-ui-sidebar-right bundle (same harness line as .dsh-version.json's dsh pin), with a generated banner, the module-table id rewritten to dsh-rightbar, and the patch list in scripts/sync-vendored.ps1 applied on top — today that list is the dock's pane ceiling and nothing else (see Four panes, not two). The bundle layer then hard-disables the two core rows and inserts the pack's:

- id: ui-sidebar-right
  disabled: true
- id: ui-sidebar-files
  disabled: true
- insert:
    - id: rightbar
      name: 'dsh-rightbar'

So exactly one bar is mounted, and it is this package — the code can be changed here without touching any DeepSeek core file. The shipped @deepseek-ai/dsh-client-ui-sidebar-documentpreview row is deliberately left alone: it only consumes the sidebarRightTabs service and the sidebar.right.pane.tab seat, which this copy provides under the same names.

The contract other plugins use

Unchanged from the shipped bar — the fork's patches move one limit, never the contract:

• Registry (cordis service sidebarRightTabs): register({ id, kind, patterns?, priority?, canOpen?, title(address), guide? }) — id is also the slot key of the plugin's body/title.
• Controller (cordis service sidebarRight): openResource(address, opts), openTab(kind, opts), close, focus, split, float, dock, isExpanded, toggleExpanded.
• Seats: sidebar.right.pane.tab and sidebar.right.pane.tab.title (keyed by the definition id), sidebar.right.tab.guide (chain), sidebar.right.tab.menu.item (list), plus the rightbar / rightbar.session panel seats and the conversation.session.header.corner expand button.
• The "+" control opens the Start page, which lists each registered type's guide entries; picking one calls openTab(kind, { replaceTab: true }).

dsh-rightbar-files (the Files tab) and dsh-editor (the editor tab) are the pack's own tab types on top of this bar.

Four panes, not two (alpha.2)

The docking kit this bar is built on allows four docked panes (MAX_DOCK_PANES, with its own canSplit meaning fewer than four) and offers five drop bands per pane (centre, left, right, top, bottom). The shipped sidebar-right bundle caps the dock at two in five places, and the fork had inherited that verbatim. Alpha.2 lifts it, so the limit is the kit's own:

• Split (the strip button) still adds a column to the right of the pane it is pressed on — that is the kit's own planSplitPane, unchanged — up to four panes in a row.
• Dragging a tab into a pane's top or bottom quarter stacks a pane there instead, which is how a 2×2 is built. The drop hints for those bands ("Add top split" / "Add bottom split") and their glyphs were already in the core bundle; only the fork's own refusal of the top/bottom zones kept them from ever being offered.
• Room still wins over count. The kit hides the Split control and refuses a drop when a pane cannot hold two strips (~100px chip + 48px body each side), so four panes want a widened bar or the panel's fullscreen mode. The pack keeps its own minPaneFraction: .2, so a divider drag never leaves a pane under 20%.
• Floating panels are not counted against the four: a tab dragged out to float has no pane ceiling of its own, so it stays the way to see more than four at once.
• Panes beyond the first are created by a normal split op with a new split id, so the session store, undo/redo and the close-time merge of empty panes all handle a 2×2 exactly as they handled a single split — no format change.

Re-syncing the fork

When the pinned harness line moves:

pwsh -NoProfile -File scripts/sync-vendored.ps1
pwsh -NoProfile -File scripts/sync-vendored.ps1 -Check

(On Windows, powershell -NoProfile -ExecutionPolicy Bypass -File scripts\sync-vendored.ps1 works just as well: the script is OS-neutral.)

The script finds the harness node_modules (profile first, then the npm caches

• the Windows npm cache, ~/.npm/_npx, and the POSIX global module directories), copies each forked bundle, rewrites the module id, applies that fork's patch list, stamps the banner and prints hashes. -Check reports drift without writing (exit 1 when out of sync). If the bar's slot/service surface changed in the new line, review the diff before installing — a fork does not silently track upstream.

Layout

cordis.patch.yml   bundle layer: disables the core bar + Files rows, inserts 'rightbar'
lib/index.js       Node half: no-op row so the browser bundle ships
lib/client.js      GENERATED vendored bar (do not edit; re-sync instead)